0000843781 dtscm:C000000255Member 2026-02-01 2026-07-31 0000843781 dtscm:C000000256Member 2026-02-01 2026-07-31 0000843781 dtscm:C000000257Member 2026-02-01 2026-07-31 0000843781 dtscm:C000000258Member 2026-02-01 2026-07-31 0000843781 dtscm:C000223305Member 2026-02-01 2026-07-31 0000843781 dtscm:C000223306Member 2026-02-01 2026-07-31 0000843781 dtscm:C000260907Member 2026-02-01 2026-07-31 0000843781 2026-02-01 2026-07-31 0000843781 dtscm:C000000255Member 2026-07-31 0000843781 dtscm:NetOtherAssetsAndLiabilitiesMember dtscm:C000000255Member 2026-07-31 0000843781 us-gaap:USTreasuryBillSecuritiesMember dtscm:C000000255Member 2026-07-31 0000843781 dtscm:USTreasuryFloatingRateNotesMember dtscm:C000000255Member 2026-07-31 0000843781 us-gaap:USTreasuryNotesSecuritiesMember dtscm:C000000255Member 2026-07-31 0000843781 dtscm:C000000256Member 2026-07-31 0000843781 dtscm:NetOtherAssetsAndLiabilitiesMember dtscm:C000000256Member 2026-07-31 0000843781 us-gaap:USTreasuryBillSecuritiesMember dtscm:C000000256Member 2026-07-31 0000843781 dtscm:USTreasuryFloatingRateNotesMember dtscm:C000000256Member 2026-07-31 0000843781 us-gaap:USTreasuryNotesSecuritiesMember dtscm:C000000256Member 2026-07-31 0000843781 dtscm:C000000257Member 2026-07-31 0000843781 dtscm:NetOtherAssetsAndLiabilitiesMember dtscm:C000000257Member 2026-07-31 0000843781 us-gaap:USTreasuryBillSecuritiesMember dtscm:C000000257Member 2026-07-31 0000843781 dtscm:USTreasuryFloatingRateNotesMember dtscm:C000000257Member 2026-07-31 0000843781 us-gaap:USTreasuryNotesSecuritiesMember dtscm:C000000257Member 2026-07-31 0000843781 dtscm:C000000258Member 2026-07-31 0000843781 dtscm:NetOtherAssetsAndLiabilitiesMember dtscm:C000000258Member 2026-07-31 0000843781 us-gaap:USTreasuryBillSecuritiesMember dtscm:C000000258Member 2026-07-31 0000843781 dtscm:USTreasuryFloatingRateNotesMember dtscm:C000000258Member 2026-07-31 0000843781 us-gaap:USTreasuryNotesSecuritiesMember dtscm:C000000258Member 2026-07-31 0000843781 dtscm:C000223305Member 2026-07-31 0000843781 dtscm:NetOtherAssetsAndLiabilitiesMember dtscm:C000223305Member 2026-07-31 0000843781 us-gaap:USTreasuryBillSecuritiesMember dtscm:C000223305Member 2026-07-31 0000843781 dtscm:USTreasuryFloatingRateNotesMember dtscm:C000223305Member 2026-07-31 0000843781 us-gaap:USTreasuryNotesSecuritiesMember dtscm:C000223305Member 2026-07-31 0000843781 dtscm:C000223306Member 2026-07-31 0000843781 dtscm:NetOtherAssetsAndLiabilitiesMember dtscm:C000223306Member 2026-07-31 0000843781 us-gaap:USTreasuryBillSecuritiesMember dtscm:C000223306Member 2026-07-31 0000843781 dtscm:USTreasuryFloatingRateNotesMember dtscm:C000223306Member 2026-07-31 0000843781 us-gaap:USTreasuryNotesSecuritiesMember dtscm:C000223306Member 2026-07-31 0000843781 dtscm:C000260907Member 2026-07-31 0000843781 dtscm:NetOtherAssetsAndLiabilitiesMember dtscm:C000260907Member 2026-07-31 0000843781 us-gaap:USTreasuryBillSecuritiesMember dtscm:C000260907Member 2026-07-31 0000843781 dtscm:USTreasuryFloatingRateNotesMember dtscm:C000260907Member 2026-07-31 0000843781 us-gaap:USTreasuryNotesSecuritiesMember dtscm:C000260907Member 2026-07-31 iso4217:USD pure dtscm:Holding 0.836 0.127 0.127 0.127 0.127 -0.039 0.836 0.076 0.076 0.076 0.076 -0.039 0.836 0.076 0.076 -0.039 0.836 0.076 -0.039 0.127 0.836 -0.039 -0.039 0.127 0.127 0.836 -0.039 0.836 0000843781 false N-1A N-CSRS/A BNY Dreyfus Treasury Securities Cash Management 2026-07-31 BNY Dreyfus Treasury Securities Cash Management Institutional Shares DIRXX This semi-annual shareholder report contains important information about BNY Dreyfus Treasury Securities Cash Management (the “Fund”) for the period of February 1, 2026 to July 31, 2026. semi-annual shareholder report You can find additional information about the Fund at<br/> <span style="text-decoration-line:underline;color:rgb(0, 0, 0);line-height:7.5pt;word-break:break-all;font-weight:400;font-family:'times new roman';font-size:10pt">www.dreyfus.com/products/mm.html#overview</span>. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bny.com. www.dreyfus.com/products/mm.html#overview 1-800-373-9387 info@bny.com <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:8pt;"> <b>This report describes changes to the Fund that occurred during the reporting period.</b> </div> <div style="margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-bottom:2pt;"> <b>What were the Fund’s costs for the last </b> <b>six months</b> <b>?</b> </div><div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:3pt;">(based on a hypothetical $10,000 investment)</div><table style="width:100%;border-collapse:collapse;page-break-inside:avoid;break-inside:avoid"> <tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;background-color:rgb(0, 72, 94);border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); vertical-align: top; text-align: left; width: 25%;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); vertical-align: top; text-align: center; width: 30%;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); vertical-align: top; text-align: center; width: 40%;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside:avoid-page;page-break-inside:avoid;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial;background-color:rgb(227, 235, 237);height:19pt"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 6pt; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; text-align: left; text-indent: -6pt;">Institutional <span style="white-space:nowrap">Shares<sup style="vertical-align:super;font-size:5pt">*</sup></span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"><span style="float:none">$</span>9</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;">0.18<span>%</span><sup style="vertical-align:super;font-size:5pt">**</sup></td> </tr> </table><table style="width:100%;border-collapse:collapse;page-break-inside:avoid;break-inside:avoid;margin-bottom:22pt"> <tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-style: normal; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 10pt; text-align: left; vertical-align: super;">*</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-family: 'Times New Roman'; font-size: 9pt; line-height: normal; font-style: normal; text-align: left; vertical-align: top; color: rgb(0, 0, 0); padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0;"> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';font-size:9pt;line-height:normal;font-style:normal;text-align:left;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;">During the period, fees were waived and/or expenses reimbursed pursuant to an agreement with the Fund’s investment adviser, BNY Mellon Investment Adviser, Inc. If this agreement is not extended in the future, expenses could be higher.</div></td> </tr> <tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-style: normal; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 10pt; text-align: left; vertical-align: super;">**</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-family: 'Times New Roman'; font-size: 9pt; line-height: normal; font-style: normal; text-align: left; vertical-align: top; color: rgb(0, 0, 0); padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0;"> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';font-size:9pt;line-height:normal;font-style:normal;text-align:left;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;">Annualized.</div></td> </tr> </table> 9 0.0018 <div style="font-family:'times new roman';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-top:0px;margin-bottom:0px;"> <b>KEY FUND STATISTICS (AS OF </b> <b>7/31/26</b> <b>)</b> </div><table style="width:100%;border-collapse:collapse;page-break-inside:avoid;break-inside:avoid"> <tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;background-color:rgb(0, 72, 94);border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); padding-top: 1pt; padding-bottom: 10pt; padding-right: 3pt; padding-left: 3pt; width: 170pt; vertical-align: top; text-align: center;"><br/> Fund Size (Millions)</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); padding-top: 1pt; padding-bottom: 10pt; padding-right: 3pt; padding-left: 3pt; width: 170pt; vertical-align: top; text-align: center;"><br/> Number of Holdings</td> </tr> <tr style="break-inside:avoid-page;page-break-inside:avoid;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial;background-color:rgb(227, 235, 237);height:19pt"> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-right: 3pt; padding-left: 3pt; padding-top: 1pt; width: 170pt; font-family: 'Times New Roman'; font-weight: normal; font-size: 9pt; line-height: 9pt; vertical-align: top; text-align: center; color: rgb(0, 0, 0); padding-bottom: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial;"><span style="float:none">$</span>73,636</td> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-right: 3pt; padding-left: 3pt; padding-top: 1pt; width: 170pt; font-family: 'Times New Roman'; font-weight: normal; font-size: 9pt; line-height: 9pt; vertical-align: top; text-align: center; color: rgb(0, 0, 0); padding-bottom: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial;">69</td> </tr> </table> 73636000000 69 <div style="margin-top:0px;text-transform:uppercase;margin-bottom:3pt;font-family:'times new roman';color:rgb(0, 0, 0);font-size:9pt;font-weight:bold;letter-spacing:0px;"> <b>Portfolio Holdings (as of </b> <b>7/31/26</b> <b>)</b> </div><div style="margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:9pt;font-weight:bold;letter-spacing:0px;text-transform:none;margin-bottom:0px;page-break-after:avoid;"> <b>Allocation of Holdings (Based on Net Assets)</b> </div><div style="font-family:'times new roman';font-size:9pt;font-weight:400;color:rgb(0, 0, 0);width:540pt;margin-bottom:12pt;margin-left:18pt;"> <img alt="Graphical Representation - Top N Holdings Chart" src="chartimages_12287277.jpg" style="margin-left: 50pt; width: 437pt;"/> </div> <div style="font-family:'times new roman';font-size:9pt;font-weight:400;color:rgb(0, 0, 0);width:540pt;margin-bottom:9pt;margin-left:18pt;"> <div style="font-family:'times new roman';font-size:9pt;font-weight:400;color:rgb(0, 0, 0);break-inside:avoid;"> <div style="font-family:'times new roman';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-bottom:4pt;margin-top:0px;"> <b>How has the Fund changed?</b> </div> </div> <ul style="padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; margin-top: 0; margin-right: 0; margin-bottom: 0; margin-left: 0; counter-reset: numberedlisting 0 letteringlisting 0 letteredhead 0 lcrmnhead 0 ucletteredhead 0 ucrmnhead 0; break-inside: avoid;"> <li style="font-weight: 400; padding-left: 3pt; margin-left: 7pt; list-style-type: disc; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin-bottom: 3pt;"> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:8pt;">Effective on May 29, 2026, the Fund and it’s registered investment company changed their name from Dreyfus Treasury Securities Cash Management to BNY Dreyfus Treasury Securities Cash Management.</div> </li> </ul> </div><div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:10pt;"> <b>This is a summary of certain changes to the Fund since </b> <b>February 1, 2026</b> <b>. For more complete information, you may review the Fund’s </b> <b>current prospectus dated </b> <b>June 1, 2026</b> <b> at </b> <span style="white-space:nowrap"> <span style="text-decoration-line:underline;color:rgb(0, 0, 0);line-height:8.5pt;word-break:break-all;font-weight:bold;font-family:'times new roman';font-size:10pt">www.dreyfus.com/products/mm.html#overview</span> </span> <b> or upon request at 1-800-373-9387.</b> </div> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:8pt;">Effective on May 29, 2026, the Fund and it’s registered investment company changed their name from Dreyfus Treasury Securities Cash Management to BNY Dreyfus Treasury Securities Cash Management.</div> 2026-05-29 <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:10pt;"> <b>This is a summary of certain changes to the Fund since </b> <b>February 1, 2026</b> <b>. For more complete information, you may review the Fund’s </b> <b>current prospectus dated </b> <b>June 1, 2026</b> <b> at </b> <span style="white-space:nowrap"> <span style="text-decoration-line:underline;color:rgb(0, 0, 0);line-height:8.5pt;word-break:break-all;font-weight:bold;font-family:'times new roman';font-size:10pt">www.dreyfus.com/products/mm.html#overview</span> </span> <b> or upon request at 1-800-373-9387.</b> </div> www.dreyfus.com/products/mm.html#overview 1-800-373-9387 BNY Dreyfus Treasury Securities Cash Management Investor Shares DVRXX This semi-annual shareholder report contains important information about BNY Dreyfus Treasury Securities Cash Management (the “Fund”) for the period of February 1, 2026 to July 31, 2026. semi-annual shareholder report You can find additional information about the Fund at<br/> <span style="text-decoration-line:underline;color:rgb(0, 0, 0);line-height:7.5pt;word-break:break-all;font-weight:400;font-family:'times new roman';font-size:10pt">www.dreyfus.com/products/mm.html#overview</span>. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bny.com. www.dreyfus.com/products/mm.html#overview 1-800-373-9387 info@bny.com <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:8pt;"> <b>This report describes changes to the Fund that occurred during the reporting period.</b> </div> <div style="margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-bottom:2pt;"> <b>What were the Fund’s costs for the last </b> <b>six months</b> <b>?</b> </div><div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:3pt;">(based on a hypothetical $10,000 investment)</div><table style="width:100%;border-collapse:collapse;page-break-inside:avoid;break-inside:avoid"> <tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;background-color:rgb(0, 72, 94);border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); vertical-align: top; text-align: left; width: 25%;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); vertical-align: top; text-align: center; width: 30%;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); vertical-align: top; text-align: center; width: 40%;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside:avoid-page;page-break-inside:avoid;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial;background-color:rgb(227, 235, 237);height:19pt"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 6pt; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; text-align: left; text-indent: -6pt;">Investor <span style="white-space:nowrap">Shares<sup style="vertical-align:super;font-size:5pt">*</sup></span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"><span style="float:none">$</span>21</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;">0.42<span>%</span><sup style="vertical-align:super;font-size:5pt">**</sup></td> </tr> </table><table style="width:100%;border-collapse:collapse;page-break-inside:avoid;break-inside:avoid;margin-bottom:22pt"> <tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-style: normal; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 10pt; text-align: left; vertical-align: super;">*</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-family: 'Times New Roman'; font-size: 9pt; line-height: normal; font-style: normal; text-align: left; vertical-align: top; color: rgb(0, 0, 0); padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0;"> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';font-size:9pt;line-height:normal;font-style:normal;text-align:left;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;">During the period, fees were waived and/or expenses reimbursed pursuant to an agreement with the Fund’s investment adviser, BNY Mellon Investment Adviser, Inc. If this agreement is not extended in the future, expenses could be higher.</div></td> </tr> <tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-style: normal; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 10pt; text-align: left; vertical-align: super;">**</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-family: 'Times New Roman'; font-size: 9pt; line-height: normal; font-style: normal; text-align: left; vertical-align: top; color: rgb(0, 0, 0); padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0;"> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';font-size:9pt;line-height:normal;font-style:normal;text-align:left;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;">Annualized.</div></td> </tr> </table> 21 0.0042 <div style="font-family:'times new roman';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-top:0px;margin-bottom:0px;"> <b>KEY FUND STATISTICS (AS OF </b> <b>7/31/26</b> <b>)</b> </div><table style="width:100%;border-collapse:collapse;page-break-inside:avoid;break-inside:avoid"> <tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;background-color:rgb(0, 72, 94);border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); padding-top: 1pt; padding-bottom: 10pt; padding-right: 3pt; padding-left: 3pt; width: 170pt; vertical-align: top; text-align: center;"><br/> Fund Size (Millions)</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); padding-top: 1pt; padding-bottom: 10pt; padding-right: 3pt; padding-left: 3pt; width: 170pt; vertical-align: top; text-align: center;"><br/> Number of Holdings</td> </tr> <tr style="break-inside:avoid-page;page-break-inside:avoid;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial;background-color:rgb(227, 235, 237);height:19pt"> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-right: 3pt; padding-left: 3pt; padding-top: 1pt; width: 170pt; font-family: 'Times New Roman'; font-weight: normal; font-size: 9pt; line-height: 9pt; vertical-align: top; text-align: center; color: rgb(0, 0, 0); padding-bottom: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial;"><span style="float:none">$</span>73,636</td> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-right: 3pt; padding-left: 3pt; padding-top: 1pt; width: 170pt; font-family: 'Times New Roman'; font-weight: normal; font-size: 9pt; line-height: 9pt; vertical-align: top; text-align: center; color: rgb(0, 0, 0); padding-bottom: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial;">69</td> </tr> </table> 73636000000 69 <div style="margin-top:0px;text-transform:uppercase;margin-bottom:3pt;font-family:'times new roman';color:rgb(0, 0, 0);font-size:9pt;font-weight:bold;letter-spacing:0px;"> <b>Portfolio Holdings (as of </b> <b>7/31/26</b> <b>)</b> </div><div style="margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:9pt;font-weight:bold;letter-spacing:0px;text-transform:none;margin-bottom:0px;page-break-after:avoid;"> <b>Allocation of Holdings (Based on Net Assets)</b> </div><div style="font-family:'times new roman';font-size:9pt;font-weight:400;color:rgb(0, 0, 0);width:540pt;margin-bottom:12pt;margin-left:18pt;"> <img alt="Graphical Representation - Top N Holdings Chart" src="chartimages_12287328.jpg" style="margin-left: 50pt; width: 437pt;"/> </div> <div style="font-family:'times new roman';font-size:9pt;font-weight:400;color:rgb(0, 0, 0);width:540pt;margin-bottom:9pt;margin-left:18pt;"> <div style="font-family:'times new roman';font-size:9pt;font-weight:400;color:rgb(0, 0, 0);break-inside:avoid;"> <div style="font-family:'times new roman';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-bottom:4pt;margin-top:0px;"> <b>How has the Fund changed?</b> </div> </div> <ul style="padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; margin-top: 0; margin-right: 0; margin-bottom: 0; margin-left: 0; counter-reset: numberedlisting 0 letteringlisting 0 letteredhead 0 lcrmnhead 0 ucletteredhead 0 ucrmnhead 0; break-inside: avoid;"> <li style="font-weight: 400; padding-left: 3pt; margin-left: 7pt; list-style-type: disc; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin-bottom: 3pt;"> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:8pt;">Effective on May 29, 2026, the Fund and it’s registered investment company changed their name from Dreyfus Treasury Securities Cash Management to BNY Dreyfus Treasury Securities Cash Management.</div> </li> </ul> </div><div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:10pt;"> <b>This is a summary of certain changes to the Fund since </b> <b>February 1, 2026</b> <b>. For more complete information, you may review the Fund’s </b> <b>current prospectus dated </b> <b>June 1, 2026</b> <b> at </b> <span style="white-space:nowrap"> <span style="text-decoration-line:underline;color:rgb(0, 0, 0);line-height:8.5pt;word-break:break-all;font-weight:bold;font-family:'times new roman';font-size:10pt">www.dreyfus.com/products/mm.html#overview</span> </span> <b> or upon request at 1-800-373-9387.</b> </div> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:8pt;">Effective on May 29, 2026, the Fund and it’s registered investment company changed their name from Dreyfus Treasury Securities Cash Management to BNY Dreyfus Treasury Securities Cash Management.</div> 2026-05-29 <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:10pt;"> <b>This is a summary of certain changes to the Fund since </b> <b>February 1, 2026</b> <b>. For more complete information, you may review the Fund’s </b> <b>current prospectus dated </b> <b>June 1, 2026</b> <b> at </b> <span style="white-space:nowrap"> <span style="text-decoration-line:underline;color:rgb(0, 0, 0);line-height:8.5pt;word-break:break-all;font-weight:bold;font-family:'times new roman';font-size:10pt">www.dreyfus.com/products/mm.html#overview</span> </span> <b> or upon request at 1-800-373-9387.</b> </div> www.dreyfus.com/products/mm.html#overview 1-800-373-9387 BNY Dreyfus Treasury Securities Cash Management Administrative Shares DARXX This semi-annual shareholder report contains important information about BNY Dreyfus Treasury Securities Cash Management (the “Fund”) for the period of February 1, 2026 to July 31, 2026. semi-annual shareholder report You can find additional information about the Fund at<br/> <span style="text-decoration-line:underline;color:rgb(0, 0, 0);line-height:7.5pt;word-break:break-all;font-weight:400;font-family:'times new roman';font-size:10pt">www.dreyfus.com/products/mm.html#overview</span>. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bny.com. www.dreyfus.com/products/mm.html#overview 1-800-373-9387 info@bny.com <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:8pt;"> <b>This report describes changes to the Fund that occurred during the reporting period.</b> </div> <div style="margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-bottom:2pt;"> <b>What were the Fund’s costs for the last </b> <b>six months</b> <b>?</b> </div><div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:3pt;">(based on a hypothetical $10,000 investment)</div><table style="width:100%;border-collapse:collapse;page-break-inside:avoid;break-inside:avoid"> <tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;background-color:rgb(0, 72, 94);border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); vertical-align: top; text-align: left; width: 25%;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); vertical-align: top; text-align: center; width: 30%;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); vertical-align: top; text-align: center; width: 40%;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside:avoid-page;page-break-inside:avoid;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial;background-color:rgb(227, 235, 237);height:19pt"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 6pt; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; text-align: left; text-indent: -6pt;">Administrative <span style="white-space:nowrap">Shares<sup style="vertical-align:super;font-size:5pt">*</sup></span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"><span style="float:none">$</span>14</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;">0.28<span>%</span><sup style="vertical-align:super;font-size:5pt">**</sup></td> </tr> </table><table style="width:100%;border-collapse:collapse;page-break-inside:avoid;break-inside:avoid;margin-bottom:22pt"> <tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-style: normal; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 10pt; text-align: left; vertical-align: super;">*</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-family: 'Times New Roman'; font-size: 9pt; line-height: normal; font-style: normal; text-align: left; vertical-align: top; color: rgb(0, 0, 0); padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0;"> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';font-size:9pt;line-height:normal;font-style:normal;text-align:left;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;">During the period, fees were waived and/or expenses reimbursed pursuant to an agreement with the Fund’s investment adviser, BNY Mellon Investment Adviser, Inc. If this agreement is not extended in the future, expenses could be higher.</div></td> </tr> <tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-style: normal; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 10pt; text-align: left; vertical-align: super;">**</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-family: 'Times New Roman'; font-size: 9pt; line-height: normal; font-style: normal; text-align: left; vertical-align: top; color: rgb(0, 0, 0); padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0;"> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';font-size:9pt;line-height:normal;font-style:normal;text-align:left;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;">Annualized.</div></td> </tr> </table> 14 0.0028 <div style="font-family:'times new roman';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-top:0px;margin-bottom:0px;"> <b>KEY FUND STATISTICS (AS OF </b> <b>7/31/26</b> <b>)</b> </div><table style="width:100%;border-collapse:collapse;page-break-inside:avoid;break-inside:avoid"> <tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;background-color:rgb(0, 72, 94);border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); padding-top: 1pt; padding-bottom: 10pt; padding-right: 3pt; padding-left: 3pt; width: 170pt; vertical-align: top; text-align: center;"><br/> Fund Size (Millions)</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); padding-top: 1pt; padding-bottom: 10pt; padding-right: 3pt; padding-left: 3pt; width: 170pt; vertical-align: top; text-align: center;"><br/> Number of Holdings</td> </tr> <tr style="break-inside:avoid-page;page-break-inside:avoid;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial;background-color:rgb(227, 235, 237);height:19pt"> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-right: 3pt; padding-left: 3pt; padding-top: 1pt; width: 170pt; font-family: 'Times New Roman'; font-weight: normal; font-size: 9pt; line-height: 9pt; vertical-align: top; text-align: center; color: rgb(0, 0, 0); padding-bottom: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial;"><span style="float:none">$</span>73,636</td> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-right: 3pt; padding-left: 3pt; padding-top: 1pt; width: 170pt; font-family: 'Times New Roman'; font-weight: normal; font-size: 9pt; line-height: 9pt; vertical-align: top; text-align: center; color: rgb(0, 0, 0); padding-bottom: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial;">69</td> </tr> </table> 73636000000 69 <div style="margin-top:0px;text-transform:uppercase;margin-bottom:3pt;font-family:'times new roman';color:rgb(0, 0, 0);font-size:9pt;font-weight:bold;letter-spacing:0px;"> <b>Portfolio Holdings (as of </b> <b>7/31/26</b> <b>)</b> </div><div style="margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:9pt;font-weight:bold;letter-spacing:0px;text-transform:none;margin-bottom:0px;page-break-after:avoid;"> <b>Allocation of Holdings (Based on Net Assets)</b> </div><div style="font-family:'times new roman';font-size:9pt;font-weight:400;color:rgb(0, 0, 0);width:540pt;margin-bottom:12pt;margin-left:18pt;"> <img alt="Graphical Representation - Top N Holdings Chart" src="chartimages_12287226.jpg" style="margin-left: 50pt; width: 437pt;"/> </div> <div style="font-family:'times new roman';font-size:9pt;font-weight:400;color:rgb(0, 0, 0);width:540pt;margin-bottom:9pt;margin-left:18pt;"> <div style="font-family:'times new roman';font-size:9pt;font-weight:400;color:rgb(0, 0, 0);break-inside:avoid;"> <div style="font-family:'times new roman';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-bottom:4pt;margin-top:0px;"> <b>How has the Fund changed?</b> </div> </div> <ul style="padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; margin-top: 0; margin-right: 0; margin-bottom: 0; margin-left: 0; counter-reset: numberedlisting 0 letteringlisting 0 letteredhead 0 lcrmnhead 0 ucletteredhead 0 ucrmnhead 0; break-inside: avoid;"> <li style="font-weight: 400; padding-left: 3pt; margin-left: 7pt; list-style-type: disc; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin-bottom: 3pt;"> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:8pt;">Effective on May 29, 2026, the Fund and it’s registered investment company changed their name from Dreyfus Treasury Securities Cash Management to BNY Dreyfus Treasury Securities Cash Management.</div> </li> </ul> </div><div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:10pt;"> <b>This is a summary of certain changes to the Fund since </b> <b>February 1, 2026</b> <b>. For more complete information, you may review the Fund’s </b> <b>current prospectus dated </b> <b>June 1, 2026</b> <b> at </b> <span style="white-space:nowrap"> <span style="text-decoration-line:underline;color:rgb(0, 0, 0);line-height:8.5pt;word-break:break-all;font-weight:bold;font-family:'times new roman';font-size:10pt">www.dreyfus.com/products/mm.html#overview</span> </span> <b> or upon request at 1-800-373-9387.</b> </div> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:8pt;">Effective on May 29, 2026, the Fund and it’s registered investment company changed their name from Dreyfus Treasury Securities Cash Management to BNY Dreyfus Treasury Securities Cash Management.</div> 2026-05-29 <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:10pt;"> <b>This is a summary of certain changes to the Fund since </b> <b>February 1, 2026</b> <b>. For more complete information, you may review the Fund’s </b> <b>current prospectus dated </b> <b>June 1, 2026</b> <b> at </b> <span style="white-space:nowrap"> <span style="text-decoration-line:underline;color:rgb(0, 0, 0);line-height:8.5pt;word-break:break-all;font-weight:bold;font-family:'times new roman';font-size:10pt">www.dreyfus.com/products/mm.html#overview</span> </span> <b> or upon request at 1-800-373-9387.</b> </div> www.dreyfus.com/products/mm.html#overview 1-800-373-9387 BNY Dreyfus Treasury Securities Cash Management Participant Shares DPRXX This semi-annual shareholder report contains important information about BNY Dreyfus Treasury Securities Cash Management (the “Fund”) for the period of February 1, 2026 to July 31, 2026. semi-annual shareholder report You can find additional information about the Fund at<br/> <span style="text-decoration-line:underline;color:rgb(0, 0, 0);line-height:7.5pt;word-break:break-all;font-weight:400;font-family:'times new roman';font-size:10pt">www.dreyfus.com/products/mm.html#overview</span>. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bny.com. www.dreyfus.com/products/mm.html#overview 1-800-373-9387 info@bny.com <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:8pt;"> <b>This report describes changes to the Fund that occurred during the reporting period.</b> </div> <div style="margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-bottom:2pt;"> <b>What were the Fund’s costs for the last </b> <b>six months</b> <b>?</b> </div><div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:3pt;">(based on a hypothetical $10,000 investment)</div><table style="width:100%;border-collapse:collapse;page-break-inside:avoid;break-inside:avoid"> <tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;background-color:rgb(0, 72, 94);border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); vertical-align: top; text-align: left; width: 25%;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); vertical-align: top; text-align: center; width: 30%;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); vertical-align: top; text-align: center; width: 40%;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside:avoid-page;page-break-inside:avoid;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial;background-color:rgb(227, 235, 237);height:19pt"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 6pt; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; text-align: left; text-indent: -6pt;">Participant <span style="white-space:nowrap">Shares<sup style="vertical-align:super;font-size:5pt">*</sup></span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"><span style="float:none">$</span>28</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;">0.57<span>%</span><sup style="vertical-align:super;font-size:5pt">**</sup></td> </tr> </table><table style="width:100%;border-collapse:collapse;page-break-inside:avoid;break-inside:avoid;margin-bottom:22pt"> <tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-style: normal; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 10pt; text-align: left; vertical-align: super;">*</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-family: 'Times New Roman'; font-size: 9pt; line-height: normal; font-style: normal; text-align: left; vertical-align: top; color: rgb(0, 0, 0); padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0;"> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';font-size:9pt;line-height:normal;font-style:normal;text-align:left;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;">During the period, fees were waived and/or expenses reimbursed pursuant to an agreement with the Fund’s investment adviser, BNY Mellon Investment Adviser, Inc. If this agreement is not extended in the future, expenses could be higher.</div></td> </tr> <tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-style: normal; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 10pt; text-align: left; vertical-align: super;">**</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-family: 'Times New Roman'; font-size: 9pt; line-height: normal; font-style: normal; text-align: left; vertical-align: top; color: rgb(0, 0, 0); padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0;"> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';font-size:9pt;line-height:normal;font-style:normal;text-align:left;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;">Annualized.</div></td> </tr> </table> 28 0.0057 <div style="font-family:'times new roman';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-top:0px;margin-bottom:0px;"> <b>KEY FUND STATISTICS (AS OF </b> <b>7/31/26</b> <b>)</b> </div><table style="width:100%;border-collapse:collapse;page-break-inside:avoid;break-inside:avoid"> <tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;background-color:rgb(0, 72, 94);border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); padding-top: 1pt; padding-bottom: 10pt; padding-right: 3pt; padding-left: 3pt; width: 170pt; vertical-align: top; text-align: center;"><br/> Fund Size (Millions)</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); padding-top: 1pt; padding-bottom: 10pt; padding-right: 3pt; padding-left: 3pt; width: 170pt; vertical-align: top; text-align: center;"><br/> Number of Holdings</td> </tr> <tr style="break-inside:avoid-page;page-break-inside:avoid;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial;background-color:rgb(227, 235, 237);height:19pt"> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-right: 3pt; padding-left: 3pt; padding-top: 1pt; width: 170pt; font-family: 'Times New Roman'; font-weight: normal; font-size: 9pt; line-height: 9pt; vertical-align: top; text-align: center; color: rgb(0, 0, 0); padding-bottom: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial;"><span style="float:none">$</span>73,636</td> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-right: 3pt; padding-left: 3pt; padding-top: 1pt; width: 170pt; font-family: 'Times New Roman'; font-weight: normal; font-size: 9pt; line-height: 9pt; vertical-align: top; text-align: center; color: rgb(0, 0, 0); padding-bottom: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial;">69</td> </tr> </table> 73636000000 69 <div style="margin-top:0px;text-transform:uppercase;margin-bottom:3pt;font-family:'times new roman';color:rgb(0, 0, 0);font-size:9pt;font-weight:bold;letter-spacing:0px;"> <b>Portfolio Holdings (as of </b> <b>7/31/26</b> <b>)</b> </div><div style="margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:9pt;font-weight:bold;letter-spacing:0px;text-transform:none;margin-bottom:0px;page-break-after:avoid;"> <b>Allocation of Holdings (Based on Net Assets)</b> </div><div style="font-family:'times new roman';font-size:9pt;font-weight:400;color:rgb(0, 0, 0);width:540pt;margin-bottom:12pt;margin-left:18pt;"> <img alt="Graphical Representation - Top N Holdings Chart" src="chartimages_12287379.jpg" style="margin-left: 50pt; width: 437pt;"/> </div> <div style="font-family:'times new roman';font-size:9pt;font-weight:400;color:rgb(0, 0, 0);width:540pt;margin-bottom:9pt;margin-left:18pt;"> <div style="font-family:'times new roman';font-size:9pt;font-weight:400;color:rgb(0, 0, 0);break-inside:avoid;"> <div style="font-family:'times new roman';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-bottom:4pt;margin-top:0px;"> <b>How has the Fund changed?</b> </div> </div> <ul style="padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; margin-top: 0; margin-right: 0; margin-bottom: 0; margin-left: 0; counter-reset: numberedlisting 0 letteringlisting 0 letteredhead 0 lcrmnhead 0 ucletteredhead 0 ucrmnhead 0; break-inside: avoid;"> <li style="font-weight: 400; padding-left: 3pt; margin-left: 7pt; list-style-type: disc; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin-bottom: 3pt;"> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:8pt;">Effective on May 29, 2026, the Fund and it’s registered investment company changed their name from Dreyfus Treasury Securities Cash Management to BNY Dreyfus Treasury Securities Cash Management.</div> </li> </ul> </div><div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:10pt;"> <b>This is a summary of certain changes to the Fund since </b> <b>February 1, 2026</b> <b>. For more complete information, you may review the Fund’s </b> <b>current prospectus dated </b> <b>June 1, 2026</b> <b> at </b> <span style="white-space:nowrap"> <span style="text-decoration-line:underline;color:rgb(0, 0, 0);line-height:8.5pt;word-break:break-all;font-weight:bold;font-family:'times new roman';font-size:10pt">www.dreyfus.com/products/mm.html#overview</span> </span> <b> or upon request at 1-800-373-9387.</b> </div> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:8pt;">Effective on May 29, 2026, the Fund and it’s registered investment company changed their name from Dreyfus Treasury Securities Cash Management to BNY Dreyfus Treasury Securities Cash Management.</div> 2026-05-29 <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:10pt;"> <b>This is a summary of certain changes to the Fund since </b> <b>February 1, 2026</b> <b>. For more complete information, you may review the Fund’s </b> <b>current prospectus dated </b> <b>June 1, 2026</b> <b> at </b> <span style="white-space:nowrap"> <span style="text-decoration-line:underline;color:rgb(0, 0, 0);line-height:8.5pt;word-break:break-all;font-weight:bold;font-family:'times new roman';font-size:10pt">www.dreyfus.com/products/mm.html#overview</span> </span> <b> or upon request at 1-800-373-9387.</b> </div> www.dreyfus.com/products/mm.html#overview 1-800-373-9387 BNY Dreyfus Treasury Securities Cash Management Wealth Shares DTJXX This semi-annual shareholder report contains important information about BNY Dreyfus Treasury Securities Cash Management (the “Fund”) for the period of February 1, 2026 to July 31, 2026. semi-annual shareholder report You can find additional information about the Fund at<br/> <span style="text-decoration-line:underline;color:rgb(0, 0, 0);line-height:7.5pt;word-break:break-all;font-weight:400;font-family:'times new roman';font-size:10pt">www.dreyfus.com/products/mm.html#overview</span>. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bny.com. www.dreyfus.com/products/mm.html#overview 1-800-373-9387 info@bny.com <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:8pt;"> <b>This report describes changes to the Fund that occurred during the reporting period.</b> </div> <div style="margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-bottom:2pt;"> <b>What were the Fund’s costs for the last </b> <b>six months</b> <b>?</b> </div><div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:3pt;">(based on a hypothetical $10,000 investment)</div><table style="width:100%;border-collapse:collapse;page-break-inside:avoid;break-inside:avoid"> <tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;background-color:rgb(0, 72, 94);border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); vertical-align: top; text-align: left; width: 25%;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); vertical-align: top; text-align: center; width: 30%;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); vertical-align: top; text-align: center; width: 40%;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside:avoid-page;page-break-inside:avoid;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial;background-color:rgb(227, 235, 237);height:19pt"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 6pt; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; text-align: left; text-indent: -6pt;">Wealth <span style="white-space:nowrap">Shares<sup style="vertical-align:super;font-size:5pt">*</sup></span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"><span style="float:none">$</span>22</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;">0.44<span>%</span><sup style="vertical-align:super;font-size:5pt">**</sup></td> </tr> </table><table style="width:100%;border-collapse:collapse;page-break-inside:avoid;break-inside:avoid;margin-bottom:22pt"> <tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-style: normal; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 10pt; text-align: left; vertical-align: super;">*</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-family: 'Times New Roman'; font-size: 9pt; line-height: normal; font-style: normal; text-align: left; vertical-align: top; color: rgb(0, 0, 0); padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0;"> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';font-size:9pt;line-height:normal;font-style:normal;text-align:left;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;">During the period, fees were waived and/or expenses reimbursed pursuant to an agreement with the Fund’s investment adviser, BNY Mellon Investment Adviser, Inc. If this agreement is not extended in the future, expenses could be higher.</div></td> </tr> <tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-style: normal; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 10pt; text-align: left; vertical-align: super;">**</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-family: 'Times New Roman'; font-size: 9pt; line-height: normal; font-style: normal; text-align: left; vertical-align: top; color: rgb(0, 0, 0); padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0;"> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';font-size:9pt;line-height:normal;font-style:normal;text-align:left;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;">Annualized.</div></td> </tr> </table> 22 0.0044 <div style="font-family:'times new roman';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-top:0px;margin-bottom:0px;"> <b>KEY FUND STATISTICS (AS OF </b> <b>7/31/26</b> <b>)</b> </div><table style="width:100%;border-collapse:collapse;page-break-inside:avoid;break-inside:avoid"> <tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;background-color:rgb(0, 72, 94);border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); padding-top: 1pt; padding-bottom: 10pt; padding-right: 3pt; padding-left: 3pt; width: 170pt; vertical-align: top; text-align: center;"><br/> Fund Size (Millions)</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); padding-top: 1pt; padding-bottom: 10pt; padding-right: 3pt; padding-left: 3pt; width: 170pt; vertical-align: top; text-align: center;"><br/> Number of Holdings</td> </tr> <tr style="break-inside:avoid-page;page-break-inside:avoid;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial;background-color:rgb(227, 235, 237);height:19pt"> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-right: 3pt; padding-left: 3pt; padding-top: 1pt; width: 170pt; font-family: 'Times New Roman'; font-weight: normal; font-size: 9pt; line-height: 9pt; vertical-align: top; text-align: center; color: rgb(0, 0, 0); padding-bottom: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial;"><span style="float:none">$</span>73,636</td> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-right: 3pt; padding-left: 3pt; padding-top: 1pt; width: 170pt; font-family: 'Times New Roman'; font-weight: normal; font-size: 9pt; line-height: 9pt; vertical-align: top; text-align: center; color: rgb(0, 0, 0); padding-bottom: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial;">69</td> </tr> </table> 73636000000 69 <div style="margin-top:0px;text-transform:uppercase;margin-bottom:3pt;font-family:'times new roman';color:rgb(0, 0, 0);font-size:9pt;font-weight:bold;letter-spacing:0px;"> <b>Portfolio Holdings (as of </b> <b>7/31/26</b> <b>)</b> </div><div style="margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:9pt;font-weight:bold;letter-spacing:0px;text-transform:none;margin-bottom:0px;page-break-after:avoid;"> <b>Allocation of Holdings (Based on Net Assets)</b> </div><div style="font-family:'times new roman';font-size:9pt;font-weight:400;color:rgb(0, 0, 0);width:540pt;margin-bottom:12pt;margin-left:18pt;"> <img alt="Graphical Representation - Top N Holdings Chart" src="chartimages_12287481.jpg" style="margin-left: 50pt; width: 437pt;"/> </div> <div style="font-family:'times new roman';font-size:9pt;font-weight:400;color:rgb(0, 0, 0);width:540pt;margin-bottom:9pt;margin-left:18pt;"> <div style="font-family:'times new roman';font-size:9pt;font-weight:400;color:rgb(0, 0, 0);break-inside:avoid;"> <div style="font-family:'times new roman';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-bottom:4pt;margin-top:0px;"> <b>How has the Fund changed?</b> </div> </div> <ul style="padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; margin-top: 0; margin-right: 0; margin-bottom: 0; margin-left: 0; counter-reset: numberedlisting 0 letteringlisting 0 letteredhead 0 lcrmnhead 0 ucletteredhead 0 ucrmnhead 0; break-inside: avoid;"> <li style="font-weight: 400; padding-left: 3pt; margin-left: 7pt; list-style-type: disc; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin-bottom: 3pt;"> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:8pt;">Effective on May 29, 2026, the Fund and it’s registered investment company changed their name from Dreyfus Treasury Securities Cash Management to BNY Dreyfus Treasury Securities Cash Management.</div> </li> </ul> </div><div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:10pt;"> <b>This is a summary of certain changes to the Fund since </b> <b>February 1, 2026</b> <b>. For more complete information, you may review the Fund’s </b> <b>current prospectus dated </b> <b>June 1, 2026</b> <b> at </b> <span style="white-space:nowrap"> <span style="text-decoration-line:underline;color:rgb(0, 0, 0);line-height:8.5pt;word-break:break-all;font-weight:bold;font-family:'times new roman';font-size:10pt">www.dreyfus.com/products/mm.html#overview</span> </span> <b> or upon request at 1-800-373-9387.</b> </div> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:8pt;">Effective on May 29, 2026, the Fund and it’s registered investment company changed their name from Dreyfus Treasury Securities Cash Management to BNY Dreyfus Treasury Securities Cash Management.</div> 2026-05-29 <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:10pt;"> <b>This is a summary of certain changes to the Fund since </b> <b>February 1, 2026</b> <b>. For more complete information, you may review the Fund’s </b> <b>current prospectus dated </b> <b>June 1, 2026</b> <b> at </b> <span style="white-space:nowrap"> <span style="text-decoration-line:underline;color:rgb(0, 0, 0);line-height:8.5pt;word-break:break-all;font-weight:bold;font-family:'times new roman';font-size:10pt">www.dreyfus.com/products/mm.html#overview</span> </span> <b> or upon request at 1-800-373-9387.</b> </div> www.dreyfus.com/products/mm.html#overview 1-800-373-9387 BNY Dreyfus Treasury Securities Cash Management Service Shares DTHXX This semi-annual shareholder report contains important information about BNY Dreyfus Treasury Securities Cash Management (the “Fund”) for the period of February 1, 2026 to July 31, 2026. semi-annual shareholder report You can find additional information about the Fund at<br/> <span style="text-decoration-line:underline;color:rgb(0, 0, 0);line-height:7.5pt;word-break:break-all;font-weight:400;font-family:'times new roman';font-size:10pt">www.dreyfus.com/products/mm.html#overview</span>. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bny.com. www.dreyfus.com/products/mm.html#overview 1-800-373-9387 info@bny.com <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:8pt;"> <b>This report describes changes to the Fund that occurred during the reporting period.</b> </div> <div style="margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-bottom:2pt;"> <b>What were the Fund’s costs for the last </b> <b>six months</b> <b>?</b> </div><div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:3pt;">(based on a hypothetical $10,000 investment)</div><table style="width:100%;border-collapse:collapse;page-break-inside:avoid;break-inside:avoid"> <tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;background-color:rgb(0, 72, 94);border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); vertical-align: top; text-align: left; width: 25%;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); vertical-align: top; text-align: center; width: 30%;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); vertical-align: top; text-align: center; width: 40%;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside:avoid-page;page-break-inside:avoid;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial;background-color:rgb(227, 235, 237);height:19pt"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 6pt; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; text-align: left; text-indent: -6pt;">Service <span style="white-space:nowrap">Shares<sup style="vertical-align:super;font-size:5pt">*</sup></span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"><span style="float:none">$</span>48</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;">0.97<span>%</span><sup style="vertical-align:super;font-size:5pt">**</sup></td> </tr> </table><table style="width:100%;border-collapse:collapse;page-break-inside:avoid;break-inside:avoid;margin-bottom:22pt"> <tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-style: normal; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 10pt; text-align: left; vertical-align: super;">*</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-family: 'Times New Roman'; font-size: 9pt; line-height: normal; font-style: normal; text-align: left; vertical-align: top; color: rgb(0, 0, 0); padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0;"> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';font-size:9pt;line-height:normal;font-style:normal;text-align:left;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;">During the period, fees were waived and/or expenses reimbursed pursuant to an agreement with the Fund’s investment adviser, BNY Mellon Investment Adviser, Inc. If this agreement is not extended in the future, expenses could be higher.</div></td> </tr> <tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-style: normal; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 10pt; text-align: left; vertical-align: super;">**</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-family: 'Times New Roman'; font-size: 9pt; line-height: normal; font-style: normal; text-align: left; vertical-align: top; color: rgb(0, 0, 0); padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0;"> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';font-size:9pt;line-height:normal;font-style:normal;text-align:left;vertical-align:top;color:rgb(0, 0, 0);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom:0px;">Annualized.</div></td> </tr> </table> 48 0.0097 <div style="font-family:'times new roman';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-top:0px;margin-bottom:0px;"> <b>KEY FUND STATISTICS (AS OF </b> <b>7/31/26</b> <b>)</b> </div><table style="width:100%;border-collapse:collapse;page-break-inside:avoid;break-inside:avoid"> <tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;background-color:rgb(0, 72, 94);border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); padding-top: 1pt; padding-bottom: 10pt; padding-right: 3pt; padding-left: 3pt; width: 170pt; vertical-align: top; text-align: center;"><br/> Fund Size (Millions)</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); padding-top: 1pt; padding-bottom: 10pt; padding-right: 3pt; padding-left: 3pt; width: 170pt; vertical-align: top; text-align: center;"><br/> Number of Holdings</td> </tr> <tr style="break-inside:avoid-page;page-break-inside:avoid;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial;background-color:rgb(227, 235, 237);height:19pt"> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-right: 3pt; padding-left: 3pt; padding-top: 1pt; width: 170pt; font-family: 'Times New Roman'; font-weight: normal; font-size: 9pt; line-height: 9pt; vertical-align: top; text-align: center; color: rgb(0, 0, 0); padding-bottom: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial;"><span style="float:none">$</span>73,636</td> <td style="break-inside: avoid-page; page-break-inside: avoid; padding-right: 3pt; padding-left: 3pt; padding-top: 1pt; width: 170pt; font-family: 'Times New Roman'; font-weight: normal; font-size: 9pt; line-height: 9pt; vertical-align: top; text-align: center; color: rgb(0, 0, 0); padding-bottom: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial;">69</td> </tr> </table> 73636000000 69 <div style="margin-top:0px;text-transform:uppercase;margin-bottom:3pt;font-family:'times new roman';color:rgb(0, 0, 0);font-size:9pt;font-weight:bold;letter-spacing:0px;"> <b>Portfolio Holdings (as of </b> <b>7/31/26</b> <b>)</b> </div><div style="margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:9pt;font-weight:bold;letter-spacing:0px;text-transform:none;margin-bottom:0px;page-break-after:avoid;"> <b>Allocation of Holdings (Based on Net Assets)</b> </div><div style="font-family:'times new roman';font-size:9pt;font-weight:400;color:rgb(0, 0, 0);width:540pt;margin-bottom:12pt;margin-left:18pt;"> <img alt="Graphical Representation - Top N Holdings Chart" src="chartimages_12287430.jpg" style="margin-left: 50pt; width: 437pt;"/> </div> <div style="font-family:'times new roman';font-size:9pt;font-weight:400;color:rgb(0, 0, 0);width:540pt;margin-bottom:9pt;margin-left:18pt;"> <div style="font-family:'times new roman';font-size:9pt;font-weight:400;color:rgb(0, 0, 0);break-inside:avoid;"> <div style="font-family:'times new roman';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-bottom:4pt;margin-top:0px;"> <b>How has the Fund changed?</b> </div> </div> <ul style="padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; margin-top: 0; margin-right: 0; margin-bottom: 0; margin-left: 0; counter-reset: numberedlisting 0 letteringlisting 0 letteredhead 0 lcrmnhead 0 ucletteredhead 0 ucrmnhead 0; break-inside: avoid;"> <li style="font-weight: 400; padding-left: 3pt; margin-left: 7pt; list-style-type: disc; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin-bottom: 3pt;"> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:8pt;">Effective on May 29, 2026, the Fund and it’s registered investment company changed their name from Dreyfus Treasury Securities Cash Management to BNY Dreyfus Treasury Securities Cash Management.</div> </li> </ul> </div><div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:10pt;"> <b>This is a summary of certain changes to the Fund since </b> <b>February 1, 2026</b> <b>. For more complete information, you may review the Fund’s </b> <b>current prospectus dated </b> <b>June 1, 2026</b> <b> at </b> <span style="white-space:nowrap"> <span style="text-decoration-line:underline;color:rgb(0, 0, 0);line-height:8.5pt;word-break:break-all;font-weight:bold;font-family:'times new roman';font-size:10pt">www.dreyfus.com/products/mm.html#overview</span> </span> <b> or upon request at 1-800-373-9387.</b> </div> <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:8pt;">Effective on May 29, 2026, the Fund and it’s registered investment company changed their name from Dreyfus Treasury Securities Cash Management to BNY Dreyfus Treasury Securities Cash Management.</div> 2026-05-29 <div style="font-weight:400;margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:10pt;"> <b>This is a summary of certain changes to the Fund since </b> <b>February 1, 2026</b> <b>. For more complete information, you may review the Fund’s </b> <b>current prospectus dated </b> <b>June 1, 2026</b> <b> at </b> <span style="white-space:nowrap"> <span style="text-decoration-line:underline;color:rgb(0, 0, 0);line-height:8.5pt;word-break:break-all;font-weight:bold;font-family:'times new roman';font-size:10pt">www.dreyfus.com/products/mm.html#overview</span> </span> <b> or upon request at 1-800-373-9387.</b> </div> www.dreyfus.com/products/mm.html#overview 1-800-373-9387 BNY Dreyfus Treasury Securities Cash Management Token-Enabled Shares TKNXX This semi-annual shareholder report contains important information about BNY Dreyfus Treasury Securities Cash Management (the “Fund”) for the period of February 1, 2026 to July 31, 2026. semi-annual shareholder report You can find additional information about the Fund at<br/><span style="text-decoration-line: underline; color: rgb(0, 0, 0); line-height: 7.5pt; word-break: break-all; font-weight: 400; font-family: 'times new roman'; font-size: 10pt;">www.dreyfus.com/products/mm.html#overview</span>. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bny.com. www.dreyfus.com/products/mm.html#overview 1-800-373-9387 info@bny.com <div style="font-weight: 400; margin-top: 0px; font-family: 'times new roman'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin-bottom: 8pt;"><b>This report describes changes to the Fund that occurred during the reporting period.</b></div> <div style="margin-top: 0px; font-family: 'times new roman'; color: rgb(0, 0, 0); font-size: 11pt; font-weight: bold; margin-bottom: 2pt;"><b>What were the Fund’s costs for the last </b> <b>six months</b> <b>?</b></div> <div style="font-weight: 400; margin-top: 0px; font-family: 'times new roman'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin-bottom: 3pt;">(based on a hypothetical $10,000 investment)</div> <table style="width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: auto; background-color: rgb(0, 72, 94); border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); vertical-align: top; text-align: left; width: 25%; padding: 1pt 3pt 10pt 3pt;">Share Class</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); vertical-align: top; text-align: center; width: 30%; padding: 1pt 3pt 10pt 3pt;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); vertical-align: top; text-align: center; width: 40%; padding: 1pt 3pt 10pt 3pt;">Costs paid as a percentage of a $10,000 investment</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; background-color: rgb(227, 235, 237); height: 19pt;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; text-align: left; text-indent: -6pt; padding: 1pt 3pt 3pt 6pt;">Token-Enabled <span style="white-space: nowrap;">Shares<sup style="vertical-align: super; font-size: 5pt;">*</sup></span></td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top; padding: 1pt 3pt 3pt 3pt;"><span style="float: none;">$</span>9</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; white-space: nowrap; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top; padding: 1pt 3pt 3pt 3pt;">0.18<span>%</span><sup style="vertical-align: super; font-size: 5pt;">**</sup></td> </tr> </table> <table style="width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; margin-bottom: 22pt;"> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-style: normal; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; width: 10pt; text-align: left; vertical-align: super; padding: 0;">*</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-family: 'Times New Roman'; font-size: 9pt; line-height: normal; font-style: normal; text-align: left; vertical-align: top; color: rgb(0, 0, 0); padding: 0;"> <div style="font-weight: 400; margin-top: 0px; font-family: 'times new roman'; font-size: 9pt; line-height: normal; font-style: normal; text-align: left; vertical-align: top; color: rgb(0, 0, 0); margin-bottom: 0px; padding: 0px;">During the period, fees were waived and/or expenses reimbursed pursuant to an agreement with the Fund’s investment adviser, BNY Mellon Investment Adviser, Inc. If this agreement is not extended in the future, expenses could be higher.</div> </td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; height: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-style: normal; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; width: 10pt; text-align: left; vertical-align: super; padding: 0;">**</td> <td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; margin-bottom: 0; font-family: 'Times New Roman'; font-size: 9pt; line-height: normal; font-style: normal; text-align: left; vertical-align: top; color: rgb(0, 0, 0); padding: 0;"> <div style="font-weight: 400; margin-top: 0px; font-family: 'times new roman'; font-size: 9pt; line-height: normal; font-style: normal; text-align: left; vertical-align: top; color: rgb(0, 0, 0); margin-bottom: 0px; padding: 0px;">Annualized.</div> </td> </tr> </table> 9 0.0018 <div style="font-family: 'times new roman'; color: rgb(0, 0, 0); font-size: 11pt; font-weight: bold; margin-top: 0px; margin-bottom: 0px;"><b>KEY FUND STATISTICS (AS OF </b> <b>7/31/26</b> <b>)</b></div> <table style="width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"> <tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: auto; background-color: rgb(0, 72, 94); border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); width: 170pt; vertical-align: top; text-align: center; padding: 1pt 3pt 10pt 3pt;"><br/>Fund Size (Millions)</td> <td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-size: 9pt; line-height: 9pt; font-weight: bold; color: rgb(255, 255, 255); width: 170pt; vertical-align: top; text-align: center; padding: 1pt 3pt 10pt 3pt;"><br/>Number of Holdings</td> </tr> <tr style="break-inside: avoid-page; page-break-inside: avoid; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; background-color: rgb(227, 235, 237); height: 19pt;"> <td style="break-inside: avoid-page; page-break-inside: avoid; width: 170pt; font-family: 'Times New Roman'; font-weight: normal; font-size: 9pt; line-height: 9pt; vertical-align: top; text-align: center; color: rgb(0, 0, 0); border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 1pt 3pt 1pt 3pt;"><span style="float: none;">$</span>73,636</td> <td style="break-inside: avoid-page; page-break-inside: avoid; width: 170pt; font-family: 'Times New Roman'; font-weight: normal; font-size: 9pt; line-height: 9pt; vertical-align: top; text-align: center; color: rgb(0, 0, 0); border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 1pt 3pt 1pt 3pt;">69</td> </tr> </table> 73636000000 69 <div style="margin-top: 0px; text-transform: uppercase; margin-bottom: 3pt; font-family: 'times new roman'; color: rgb(0, 0, 0); font-size: 9pt; font-weight: bold; letter-spacing: 0px;"><b>Portfolio Holdings (as of </b> <b>7/31/26</b> <b>)</b></div> <div style="margin-top: 0px; font-family: 'times new roman'; color: rgb(0, 0, 0); font-size: 9pt; font-weight: bold; letter-spacing: 0px; text-transform: none; margin-bottom: 0px; page-break-after: avoid;"><b>Allocation of Holdings (Based on Net Assets)</b></div> <div style="font-family: 'times new roman'; font-size: 9pt; font-weight: 400; color: rgb(0, 0, 0); width: 540pt; margin-bottom: 12pt; margin-left: 18pt;"><img alt="Graphical Representation - Top N Holdings Chart" src="chartimages_12287532.jpg" style="margin-left: 50pt; width: 437pt;"/> </div> <div style="font-family: 'times new roman'; font-size: 9pt; font-weight: 400; color: rgb(0, 0, 0); break-inside: avoid;"> <div style="font-family: 'times new roman'; color: rgb(0, 0, 0); font-size: 11pt; font-weight: bold; margin-bottom: 4pt; margin-top: 0px;"><b>How has the Fund changed?</b></div> <ul style="counter-reset: numberedlisting 0 letteringlisting 0 letteredhead 0 lcrmnhead 0 ucletteredhead 0 ucrmnhead 0; break-inside: avoid; padding: 0; margin: 0;"> <li style="font-weight: 400; padding-left: 3pt; margin-left: 7pt; list-style-type: disc; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin-bottom: 3pt;"> <div style="font-weight: 400; margin-top: 0px; font-family: 'times new roman'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin-bottom: 3pt;">Effective on February 2, 2026, BNY Mellon Investment Adviser, Inc. (the “Adviser”) has agreed to waive receipt of its fees and/or assume the direct expenses of the Token-Enabled shares of the Fund so that the direct expenses of such Fund’s Token-Enabled shares (excluding taxes, brokerage commissions, and extraordinary expenses) do not exceed .18% of the value of the Token-Enabled shares average daily net assets. To the extent that it is necessary for the Adviser to waive receipt of its management fee or reimburse the Fund’s common expenses, the amount of the waiver or reimbursement will be applied equally to each share class of the Fund. This expense limit is voluntary, not contractual, and may be terminated by the Adviser at any time.</div> </li> <li style="font-weight: 400; padding-left: 3pt; margin-left: 7pt; list-style-type: disc; font-family: 'Times New Roman'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin-bottom: 3pt;"> <div style="font-weight: 400; margin-top: 0px; font-family: 'times new roman'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin-bottom: 8pt;">Effective on May 29, 2026, the Fund and it’s registered investment company changed their name from Dreyfus Treasury Securities Cash Management to BNY Dreyfus Treasury Securities Cash Management.</div> </li> </ul> </div><div style="font-weight: 400; margin-top: 0px; font-family: 'times new roman'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin-bottom: 10pt;"><b>This is a summary of certain changes to the Fund since </b> <b>February 1, 2026</b> <b>. For more complete information, you may review the Fund’s </b> <b>current prospectus dated </b> <b>June 1, 2026</b> <b> at </b> <span style="white-space: nowrap;"> <span style="text-decoration-line: underline; color: rgb(0, 0, 0); line-height: 8.5pt; word-break: break-all; font-weight: bold; font-family: 'times new roman'; font-size: 10pt;">www.dreyfus.com/products/mm.html#overview</span> </span> <b> or upon request at 1-800-373-9387.</b></div> <div style="font-weight: 400; margin-top: 0px; font-family: 'times new roman'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin-bottom: 3pt;">Effective on February 2, 2026, BNY Mellon Investment Adviser, Inc. (the “Adviser”) has agreed to waive receipt of its fees and/or assume the direct expenses of the Token-Enabled shares of the Fund so that the direct expenses of such Fund’s Token-Enabled shares (excluding taxes, brokerage commissions, and extraordinary expenses) do not exceed .18% of the value of the Token-Enabled shares average daily net assets. To the extent that it is necessary for the Adviser to waive receipt of its management fee or reimburse the Fund’s common expenses, the amount of the waiver or reimbursement will be applied equally to each share class of the Fund. This expense limit is voluntary, not contractual, and may be terminated by the Adviser at any time.</div> 2026-02-02 <div style="font-weight: 400; margin-top: 0px; font-family: 'times new roman'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin-bottom: 8pt;">Effective on May 29, 2026, the Fund and it’s registered investment company changed their name from Dreyfus Treasury Securities Cash Management to BNY Dreyfus Treasury Securities Cash Management.</div> <div style="font-weight: 400; margin-top: 0px; font-family: 'times new roman'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin-bottom: 10pt;"><b>This is a summary of certain changes to the Fund since </b> <b>February 1, 2026</b> <b>. For more complete information, you may review the Fund’s </b> <b>current prospectus dated </b> <b>June 1, 2026</b> <b> at </b> <span style="white-space: nowrap;"> <span style="text-decoration-line: underline; color: rgb(0, 0, 0); line-height: 8.5pt; word-break: break-all; font-weight: bold; font-family: 'times new roman'; font-size: 10pt;">www.dreyfus.com/products/mm.html#overview</span> </span> <b> or upon request at 1-800-373-9387.</b></div> www.dreyfus.com/products/mm.html#overview 1-800-373-9387 During the period, fees were waived and/or expenses reimbursed pursuant to an agreement with the Fund’s investment adviser, BNY Mellon Investment Adviser, Inc. If this agreement is not extended in the future, expenses could be higher. During the period, fees were waived and/or expenses reimbursed pursuant to an agreement with the Fund’s investment adviser, BNY Mellon Investment Adviser, Inc. If this agreement is not extended in the future, expenses could be higher. Annualized. During the period, fees were waived and/or expenses reimbursed pursuant to an agreement with the Fund’s investment adviser, BNY Mellon Investment Adviser, Inc. If this agreement is not extended in the future, expenses could be higher. Annualized. During the period, fees were waived and/or expenses reimbursed pursuant to an agreement with the Fund’s investment adviser, BNY Mellon Investment Adviser, Inc. If this agreement is not extended in the future, expenses could be higher. Annualized. Annualized. During the period, fees were waived and/or expenses reimbursed pursuant to an agreement with the Fund’s investment adviser, BNY Mellon Investment Adviser, Inc. If this agreement is not extended in the future, expenses could be higher. Annualized. During the period, fees were waived and/or expenses reimbursed pursuant to an agreement with the Fund’s investment adviser, BNY Mellon Investment Adviser, Inc. If this agreement is not extended in the future, expenses could be higher. Annualized. During the period, fees were waived and/or expenses reimbursed pursuant to an agreement with the Fund’s investment adviser, BNY Mellon Investment Adviser, Inc. If this agreement is not extended in the future, expenses could be higher. Annualized.