c4c0f6e9-634c-4ec4-bbfa-7b5c4a3903d8

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number

811-05718

BNY Dreyfus Treasury Securities Cash Management

(Exact name of registrant as specified in charter)

c/o BNY Mellon Investment Adviser, Inc.

240 Greenwich Street

New York, New York 10286

(Address of Principal Executive Officer) (Zip Code)

Deirdre Cunnane, Esq.

240 Greenwich Street

New York, New York 10286

(Name and Address of Agent for Service)

Registrant's telephone number, including area code:

(212) 922-6400

Date of fiscal year end:

1/31

Date of reporting period:

7/31/26

ITEM 1 - Reports to Stockholders

BNY Dreyfus Treasury Securities Cash Management

SEMI-ANNUAL
SHAREHOLDER
REPORT

July 31, 2026

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. You can find additional information about the Fund at
www.dreyfus.com/products/mm.html#overview. 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.

This report describes changes to the Fund that occurred during the reporting period.

What were the Fund’s costs for the last six months ?

(based on a hypothetical $10,000 investment)

Share Class	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Institutional Shares^*	$9	0.18%^**

*	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.

KEY FUND STATISTICS (AS OF 7/31/26 )

Fund Size (Millions)	Number of Holdings
$73,636	69

Portfolio Holdings (as of 7/31/26 )

Allocation of Holdings (Based on Net Assets)

Graphical Representation - Top N Holdings Chart

How has the Fund changed?

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.

This is a summary of certain changes to the Fund since February 1, 2026 . For more complete information, you may review the Fund’s current prospectus dated June 1, 2026 at www.dreyfus.com/products/mm.html#overview or upon request at 1-800-373-9387.

For additional information about the Fund, including its prospectus, financial information and portfolio holdings, please visit
www.dreyfus.com/products/mm.html#overview .

Not FDIC Insured. Not Bank-Guaranteed. May Lose Value

240 Greenwich Street, 9th Floor, New York, NY 10286

Code-0761SA0726

BNY Dreyfus Treasury Securities Cash Management

SEMI-ANNUAL
SHAREHOLDER
REPORT

July 31, 2026

Investor Shares – DVRXX

This report describes changes to the Fund that occurred during the reporting period.

What were the Fund’s costs for the last six months ?

(based on a hypothetical $10,000 investment)

Share Class	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Investor Shares^*	$21	0.42%^**

*	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.

KEY FUND STATISTICS (AS OF 7/31/26 )

Fund Size (Millions)	Number of Holdings
$73,636	69

Portfolio Holdings (as of 7/31/26 )

Allocation of Holdings (Based on Net Assets)

How has the Fund changed?

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.

For additional information about the Fund, including its prospectus, financial information and portfolio holdings, please visit
www.dreyfus.com/products/mm.html#overview .

Not FDIC Insured. Not Bank-Guaranteed. May Lose Value

240 Greenwich Street, 9th Floor, New York, NY 10286

Code-0674SA0726

BNY Dreyfus Treasury Securities Cash Management

SEMI-ANNUAL
SHAREHOLDER
REPORT

July 31, 2026

Administrative Shares – DARXX

This report describes changes to the Fund that occurred during the reporting period.

What were the Fund’s costs for the last six months ?

(based on a hypothetical $10,000 investment)

Share Class	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Administrative Shares^*	$14	0.28%^**

*	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.

KEY FUND STATISTICS (AS OF 7/31/26 )

Fund Size (Millions)	Number of Holdings
$73,636	69

Portfolio Holdings (as of 7/31/26 )

Allocation of Holdings (Based on Net Assets)

How has the Fund changed?

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.

For additional information about the Fund, including its prospectus, financial information and portfolio holdings, please visit
www.dreyfus.com/products/mm.html#overview .

Not FDIC Insured. Not Bank-Guaranteed. May Lose Value

240 Greenwich Street, 9th Floor, New York, NY 10286

Code-0582SA0726

BNY Dreyfus Treasury Securities Cash Management

SEMI-ANNUAL
SHAREHOLDER
REPORT

July 31, 2026

Participant Shares – DPRXX

This report describes changes to the Fund that occurred during the reporting period.

What were the Fund’s costs for the last six months ?

(based on a hypothetical $10,000 investment)

Share Class	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Participant Shares^*	$28	0.57%^**

*	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.

KEY FUND STATISTICS (AS OF 7/31/26 )

Fund Size (Millions)	Number of Holdings
$73,636	69

Portfolio Holdings (as of 7/31/26 )

Allocation of Holdings (Based on Net Assets)

How has the Fund changed?

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.

For additional information about the Fund, including its prospectus, financial information and portfolio holdings, please visit
www.dreyfus.com/products/mm.html#overview .

Not FDIC Insured. Not Bank-Guaranteed. May Lose Value

240 Greenwich Street, 9th Floor, New York, NY 10286

Code-0592SA0726

BNY Dreyfus Treasury Securities Cash Management

SEMI-ANNUAL
SHAREHOLDER
REPORT

July 31, 2026

Wealth Shares – DTJXX

This report describes changes to the Fund that occurred during the reporting period.

What were the Fund’s costs for the last six months ?

(based on a hypothetical $10,000 investment)

Share Class	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Wealth Shares^*	$22	0.44%^**

*	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.

KEY FUND STATISTICS (AS OF 7/31/26 )

Fund Size (Millions)	Number of Holdings
$73,636	69

Portfolio Holdings (as of 7/31/26 )

Allocation of Holdings (Based on Net Assets)

How has the Fund changed?

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.

For additional information about the Fund, including its prospectus, financial information and portfolio holdings, please visit
www.dreyfus.com/products/mm.html#overview .

Not FDIC Insured. Not Bank-Guaranteed. May Lose Value

240 Greenwich Street, 9th Floor, New York, NY 10286

Code-6353SA0726

BNY Dreyfus Treasury Securities Cash Management

SEMI-ANNUAL
SHAREHOLDER
REPORT

July 31, 2026

Service Shares – DTHXX

This report describes changes to the Fund that occurred during the reporting period.

What were the Fund’s costs for the last six months ?

(based on a hypothetical $10,000 investment)

Share Class	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Service Shares^*	$48	0.97%^**

*	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.

KEY FUND STATISTICS (AS OF 7/31/26 )

Fund Size (Millions)	Number of Holdings
$73,636	69

Portfolio Holdings (as of 7/31/26 )

Allocation of Holdings (Based on Net Assets)

How has the Fund changed?

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.

For additional information about the Fund, including its prospectus, financial information and portfolio holdings, please visit
www.dreyfus.com/products/mm.html#overview .

Not FDIC Insured. Not Bank-Guaranteed. May Lose Value

240 Greenwich Street, 9th Floor, New York, NY 10286

Code-6352SA0726

BNY Dreyfus Treasury Securities Cash Management

SEMI-ANNUAL
SHAREHOLDER
REPORT

July 31, 2026

Token-Enabled Shares – TKNXX

This report describes changes to the Fund that occurred during the reporting period.

What were the Fund’s costs for the last six months ?

(based on a hypothetical $10,000 investment)

Share Class	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Token-Enabled Shares^*	$9	0.18%^**

*	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.

KEY FUND STATISTICS (AS OF 7/31/26 )

Fund Size (Millions)	Number of Holdings
$73,636	69

Portfolio Holdings (as of 7/31/26 )

Allocation of Holdings (Based on Net Assets)

How has the Fund changed?

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.
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.

For additional information about the Fund, including its prospectus, financial information and portfolio holdings, please visit
www.dreyfus.com/products/mm.html#overview .

Not FDIC Insured. Not Bank-Guaranteed. May Lose Value

240 Greenwich Street, 9th Floor, New York, NY 10286

Code-6359SA0726A

Item 2.

Code of Ethics.

Not applicable.

Item 3.

Audit Committee Financial Expert.

Not applicable.

Item 4.

Principal Accountant Fees and Services.

Not applicable.

Item 5.

Audit Committee of Listed Registrants.

Not applicable.

Item 6.

Investments.

Not applicable.

BNY Dreyfus Treasury Securities Cash Management

SEMI-ANNUAL FINANCIALS AND OTHER INFORMATION

July 31, 2026

Share Class	Ticker
Institutional Shares	DIRXX
Investor Shares	DVRXX
Administrative Shares	DARXX
Participant Shares	DPRXX
Wealth Shares	DTJXX
Service Shares	DTHXX
Token-Enabled Shares	TKNXX

Save time. Save paper. View your next shareholder report online as soon as it’s available. Log into www.bny.com/investments and sign up for eCommunications. It’s simple and only takes a few minutes.

The views expressed in this report reflect those of the portfolio manager(s) only through the end of the period covered and do not necessarily represent the views of BNY Mellon Investment Adviser, Inc. or any other person in the BNY Mellon Investment Adviser, Inc. organization. Any such views are subject to change at any time based upon market or other conditions and BNY Mellon Investment Adviser, Inc. disclaims any responsibility to update such views. These views may not be relied on as investment advice and, because investment decisions for a fund in the BNY Mellon Family of Funds are based on numerous factors, may not be relied on as an indication of trading intent on behalf of any fund in the BNY Mellon

Family of Funds.

Not FDIC-Insured • Not Bank-Guaranteed • May Lose Value

Contents

The Fund

Please note the Semi-Annual Financials and Other Information only contains Items 7-11 required in Form N-CSR. All other required items will be filed with the Securities and Exchange Commission (the “SEC”).

Item 7. Financial Statements and Financial Highlights for Open-End Management Investment Companies	3
Schedule of Investments	3
Statement of Assets and Liabilities	5
Statement of Operations	6
Statement of Changes in Net Assets	7
Financial Highlights	8
Notes to Financial Statements	15
Item 8. Changes in and Disagreements with Accountants for Open-End Management Investment Companies	20
Item 9. Proxy Disclosures for Open-End Management Investment Companies	21
Item 10. Remuneration Paid to Directors, Officers, and Other of Open-End Management Investment Companies	22
Item 11. Statement Regarding Basis for Approval of Investment Advisory Contracts	23

Item 7. Financial Statements and Financial Highlights for Open-End Management Investment Companies.

BNY Dreyfus Treasury Securities Cash Management

SCHEDULE OF INVESTMENTS

July 31, 2026 (Unaudited)

Description	Annualized Yield (%)	Principal Amount ($)	Value ($)
U.S. Treasury Bills — 83.6%
8/4/2026(a)	3.65	7,181,000,000	7,178,846,992
8/6/2026(a)	3.66	2,556,000,000	2,554,717,667
8/11/2026(a)	3.67	2,875,000,000	2,872,111,667
8/13/2026(a)	3.69	4,222,000,000	4,216,884,360
8/18/2026(a)	3.71	4,150,000,000	4,142,840,161
8/20/2026(a)	3.66	4,200,000,000	4,192,007,918
8/25/2026(a)	3.75	2,255,000,000	2,249,452,967
8/27/2026(a)	3.68	2,877,400,000	2,869,870,104
9/1/2026(a)	3.67	4,300,000,000	4,287,220,228
9/3/2026(a)	3.65	600,000,000	598,027,448
9/8/2026(a)	3.70	2,100,000,000	2,091,942,423
9/10/2026(a)	3.74	3,035,840,000	3,023,435,040
9/15/2026(a)	3.72	2,000,000,000	1,990,874,996
9/17/2026(a)	3.70	1,392,000,000	1,385,402,454
9/24/2026(a)	3.77	700,000,000	696,120,250
9/29/2026(a)	3.67	3,852,000,000	3,829,839,423
10/1/2026(a)	3.76	1,244,000,000	1,236,230,675
10/6/2026(a)	3.71	334,000,000	331,774,169
10/8/2026(a)	3.69	652,000,000	647,547,928
10/13/2026(a)	3.74	500,000,000	496,284,098
10/15/2026(a)	3.84	880,000,000	873,106,670
10/22/2026(a)	3.76	870,000,000	862,721,590
10/27/2026(a)	3.86	233,000,000	230,877,177
10/29/2026(a)	3.83	1,555,000,000	1,540,612,103
11/5/2026(a)	3.70	330,000,000	326,823,199
11/10/2026(a)	3.88	984,200,000	973,734,943
11/12/2026(a)	3.70	400,000,000	395,862,834
11/17/2026(a)	3.84	703,000,000	695,101,792
11/19/2026(a)	3.71	200,000,000	197,790,834
11/24/2026(a)	3.95	199,000,000	196,555,755
11/27/2026(a)	3.71	1,000,000,000	988,160,665
12/3/2026(a)	3.76	495,000,000	488,751,175
12/10/2026(a)	3.79	381,800,000	376,673,381
12/17/2026(a)	3.78	300,000,000	295,768,001
12/24/2026(a)	3.76	786,550,000	774,978,602
1/21/2027(a)	3.67	965,000,000	948,498,801
3/18/2027(a)	3.61	125,000,000	122,228,941
7/8/2027(a)	4.06	361,000,000	347,800,837
Total U.S. Treasury Bills (cost $61,527,478,268)			61,527,478,268
U.S. Treasury Floating Rate Notes — 12.7%
8/3/2026, (3 Month USBMMY +0.098%)(b)	3.95	1,498,000,000	1,498,007,264
8/3/2026, (3 Month USBMMY +0.099%)(b)	3.95	1,413,000,000	1,412,865,929
8/3/2026, (3 Month USBMMY +0.103%)(b)	3.96	1,296,120,000	1,296,503,648
8/3/2026, (3 Month USBMMY +0.159%)(b)	4.01	1,961,000,000	1,960,744,159
8/3/2026, (3 Month USBMMY +0.16%)(b)	4.01	884,000,000	883,998,887

SCHEDULE OF INVESTMENTS (Unaudited) (continued)

Description	Annualized Yield (%)	Principal Amount ($)	Value ($)
U.S. Treasury Floating Rate Notes — 12.7% (continued)
8/3/2026, (3 Month USBMMY +0.19%)(b)	4.04	894,200,000	894,652,665
8/3/2026, (3 Month USBMMY +0.205%)(b)	4.06	1,443,000,000	1,443,144,668
Total U.S. Treasury Floating Rate Notes (cost $9,389,917,220)			9,389,917,220
U.S. Treasury Notes — 7.6%
8/31/2026	3.75	102,000,000	102,003,485
9/30/2026	1.63	138,000,000	137,540,846
9/30/2026	0.88	433,000,000	430,997,231
9/30/2026	3.50	190,800,000	190,726,199
10/15/2026	4.63	28,000,000	28,052,366
10/31/2026	1.63	54,000,000	53,736,492
10/31/2026	1.13	237,700,000	236,223,516
10/31/2026	4.13	85,000,000	85,080,832
11/30/2026	1.25	121,000,000	120,068,479
11/30/2026	4.25	471,000,000	471,909,098
12/31/2026	1.25	203,700,000	201,751,093
12/31/2026	4.25	549,200,000	550,691,132
1/31/2027	4.13	207,000,000	207,596,402
2/28/2027	1.88	83,000,000	82,205,024
2/28/2027	4.13	210,000,000	210,513,158
3/15/2027	4.25	465,000,000	467,026,390
3/31/2027	2.50	100,000,000	99,288,357
3/31/2027	3.88	568,900,000	570,021,630
4/15/2027	4.50	175,000,000	176,025,008
4/30/2027	2.75	56,200,000	55,769,086
4/30/2027	3.75	247,600,000	247,594,762
5/31/2027	2.63	100,000,000	99,024,209
5/31/2027	3.88	591,600,000	591,852,189
6/15/2027	4.63	190,000,000	191,130,279
Total U.S. Treasury Notes (cost $5,606,827,263)			5,606,827,263
Total Investments (cost $76,524,222,751)		103.9 %	76,524,222,751
Liabilities, Less Cash and Receivables		(3.9 %)	(2,888,232,852 )
Net Assets		100.0 %	73,635,989,899

USBMMY—U.S. Treasury Bill Money Market Yield

(a)	Security is a discount security. Income is recognized through the accretion of discount.
(b)	Variable rate security—interest rate resets periodically and rate shown is the interest rate in effect at period end. Date shown represents the earlier of the next interest reset date or ultimate maturity date. Security description also includes the reference rate and spread if published and available.

See notes to financial statements.

STATEMENT OF ASSETS AND LIABILITIES

July 31, 2026 (Unaudited)

	Cost	Value
Assets ($):
Investments in securities—See Schedule of Investments	76,524,222,751	76,524,222,751
Cash		2,593,539,292
Receivable for shares of Beneficial Interest subscribed		60,735,701
Interest receivable		46,725,610
Prepaid expenses		1,166,968
		79,226,390,322
Liabilities ($):
Due to BNY Mellon Investment Adviser, Inc. and affiliates—Note 2(c)		14,614,748
Payable for investment securities purchased		5,524,927,164
Payable for shares of Beneficial Interest redeemed		48,722,698
Trustees’ fees and expenses payable		27,968
Other accrued expenses		2,107,845
		5,590,400,423
Net Assets ($)		73,635,989,899
Composition of Net Assets ($):
Paid-in capital		73,637,855,286
Total distributable earnings (loss)		(1,865,387 )
Net Assets ($)		73,635,989,899

Net Asset Value Per Share	Institutional Shares	Investor Shares	Administrative Shares	Participant Shares
Net Assets ($)	61,437,959,762	1,576,696,702	4,847,699,404	2,776,893,073
Shares Outstanding	61,437,184,007	1,576,663,191	4,847,573,217	2,776,792,481
Net Asset Value Per Share ($)	1.00	1.00	1.00	1.00

Net Asset Value Per Share	Wealth Shares	Service Shares	Token-Enabled Shares
Net Assets ($)	306,972,346	2,559,729,002	130,039,610
Shares Outstanding	306,954,571	2,559,652,335	130,040,000
Net Asset Value Per Share ($)	1.00	1.00	1.00

See notes to financial statements.

STATEMENT OF OPERATIONS

Six Months Ended July 31, 2026 (Unaudited)


Investment Income ($):
Interest Income	1,318,249,636
Expenses:
Management fee—Note 2(a)	71,113,533
Shareholder servicing costs—Note 2(b)	12,355,333
Administrative services plan fees—Note 2(c)	10,306,653
Registration fees	2,457,354
Custodian fees—Note 2(c)	332,086
Trustees’ fees and expenses—Note 2(d)	131,206
Professional fees	60,626
Prospectus and shareholders’ reports	30,106
Chief Compliance Officer fees—Note 2(c)	18,137
Shareholder and regulatory reports service fees—Note 2(c)	5,750
Miscellaneous	246,178
Total Expenses	97,056,962
Less—reduction in expenses due to undertaking—Note 2(a)	(10,675,759 )
Net Expenses	86,381,203
Net Investment Income	1,231,868,433
Net Realized Gain (Loss) on Investments—Note 1(b) ($)	(158,527 )
Net Increase in Net Assets Resulting from Operations	1,231,709,906

See notes to financial statements.

STATEMENT OF CHANGES IN NET ASSETS

	Six Months Ended July 31, 2026 (Unaudited)	Year Ended January 31, 2026(a)
	Six Months Ended July 31, 2026 (Unaudited)	Year Ended January 31, 2026(a)
Operations ($):
Net investment income	1,231,868,433	2,472,186,583
Net realized gain (loss) on investments	(158,527)	(85,616)
Net Increase (Decrease) in Net Assets Resulting from Operations	1,231,709,906	2,472,100,967
Distributions ($):
Distributions to shareholders:
Institutional Shares	(1,028,536,631)	(1,999,393,162)
Investor Shares	(26,138,331)	(57,583,099)
Administrative Shares	(85,943,287)	(200,446,755)
Participant Shares	(44,211,193)	(102,211,234)
Wealth Shares	(5,170,891)	(12,716,162)
Service Shares	(40,626,018)	(99,786,925)
Token-Enabled Shares	(1,370,105)	(4,744)
Total Distributions	(1,231,996,456)	(2,472,142,081)
Beneficial Interest Transactions ($1.00 per share):
Net proceeds from shares sold:
Institutional Shares	82,602,584,442	127,181,378,730
Investor Shares	3,065,349,692	5,335,619,867
Administrative Shares	9,174,675,518	19,059,925,167
Participant Shares	2,916,785,119	6,532,045,266
Wealth Shares	61,866,478	213,045,764
Service Shares	3,835,314,866	7,163,147,010
Token-Enabled Shares	130,000,000	15,140,000
Distributions reinvested:
Institutional Shares	205,370,947	453,074,434
Investor Shares	12,156,501	22,097,999
Administrative Shares	76,033,445	172,502,078
Participant Shares	41,332,544	96,233,104
Wealth Shares	4,954,171	12,178,256
Service Shares	34,238,702	86,627,165
Cost of shares redeemed:
Institutional Shares	(74,287,491,817)	(123,612,483,218)
Investor Shares	(3,191,406,931)	(5,238,183,279)
Administrative Shares	(9,888,838,152)	(18,163,428,395)
Participant Shares	(3,200,486,716)	(6,902,101,093)
Wealth Shares	(96,043,905)	(189,231,168)
Service Shares	(4,455,612,605)	(7,162,298,951)
Token-Enabled Shares	-	(15,100,000)
Increase (Decrease) in Net Assets from Beneficial Interest Transactions	7,040,782,299	5,060,188,736
Total Increase (Decrease) in Net Assets	7,040,495,749	5,060,147,622
Net Assets ($):
Beginning of Period	66,595,494,150	61,535,346,528
End of Period	73,635,989,899	66,595,494,150

(a)	On July 22, 2025, the fund commenced offering Token-Enabled shares.

See notes to financial statements.

FINANCIAL HIGHLIGHTS

The following tables describe the performance for each share class for the fiscal periods indicated. All information reflects financial results for a single fund share. Net asset value total return is calculated assuming an initial investment made at the net asset value at the beginning of the period, reinvestment of all dividends and distributions at net asset value during the period, and redemption at net asset value on the last day of the period. Net asset value total return includes adjustments in accordance with accounting principles generally accepted in the United States of America and as such, the net asset value for financial reporting purposes and the returns based upon those net asset values may differ from the net asset value and returns for shareholder transactions.

	Six Months Ended July 31, 2026 (Unaudited)	Year Ended January 31,
Institutional Shares	Six Months Ended July 31, 2026 (Unaudited)	2026	2025	2024	2023	2022
Per Share Data ($):
Net asset value, beginning of period	1.00	1.00	1.00	1.00	1.00	1.00
Investment Operations:
Net investment income	.017	.040	.049	.049	.018	.000 (a)
Distributions:
Dividends from net investment income	(.017 )	(.040 )	(.049 )	(.049 )	(.018 )	(.000 )(a)
Net asset value, end of period	1.00	1.00	1.00	1.00	1.00	1.00
Total Return (%)	1.76 (b)	4.08	5.06	5.04	1.77	.01
Ratios/Supplemental Data (%):
Ratio of total expenses to average net assets	.21 (c)	.21	.21	.21	.21	.21
Ratio of net expenses to average net assets(d)	.18 (c)	.18 (e)	.18 (e)	.18 (e)	.17 (e)	.05
Ratio of net investment income to average net assets(d)	3.53 (c)	4.00 (e)	4.93 (e)	4.97 (e)	1.78 (e)	.01
Net Assets, end of period ($ x 1,000)	61,437,960	52,917,738	48,895,813	43,641,059	31,570,972	33,717,357

(a)	Amount represents less than $.001 per share.
(b)	Not annualized.
(c)	Annualized.
(d)	Amount inclusive of reduction in expenses due to undertaking.
(e)	Amount inclusive of reduction in fees due to earnings credits.

See notes to financial statements.

	Six Months Ended July 31, 2026 (Unaudited)	Year Ended January 31,
Investor Shares	Six Months Ended July 31, 2026 (Unaudited)	2026	2025	2024	2023	2022
Per Share Data ($):
Net asset value, beginning of period	1.00	1.00	1.00	1.00	1.00	1.00
Investment Operations:
Net investment income	.016	.038	.047	.047	.015	.000 (a)
Distributions:
Dividends from net investment income	(.016 )	(.038 )	(.047 )	(.047 )	(.015 )	(.000 )(a)
Net asset value, end of period	1.00	1.00	1.00	1.00	1.00	1.00
Total Return (%)	1.64 (b)	3.83	4.80	4.78	1.56	.01
Ratios/Supplemental Data (%):
Ratio of total expenses to average net assets	.45 (c)	.45	.45	.45	.45	.45
Ratio of net expenses to average net assets(d)	.42 (c)	.42 (e)	.42 (e)	.42 (e)	.37 (e)	.05
Ratio of net investment income to average net assets(d)	3.28 (c)	3.76 (e)	4.72 (e)	4.76 (e)	1.40 (e)	.01
Net Assets, end of period ($ x 1,000)	1,576,697	1,690,605	1,571,072	1,664,092	1,461,809	1,577,212

(a)	Amount represents less than $.001 per share.
(b)	Not annualized.
(c)	Annualized.
(d)	Amount inclusive of reduction in expenses due to undertaking.
(e)	Amount inclusive of reduction in fees due to earnings credits.

See notes to financial statements.

FINANCIAL HIGHLIGHTS (continued)

	Six Months Ended July 31, 2026 (Unaudited)	Year Ended January 31,
Administrative Shares	Six Months Ended July 31, 2026 (Unaudited)	2026	2025	2024	2023	2022
Per Share Data ($):
Net asset value, beginning of period	1.00	1.00	1.00	1.00	1.00	1.00
Investment Operations:
Net investment income	.017	.039	.048	.048	.017	.000 (a)
Distributions:
Dividends from net investment income	(.017 )	(.039 )	(.048 )	(.048 )	(.017 )	(.000 )(a)
Net asset value, end of period	1.00	1.00	1.00	1.00	1.00	1.00
Total Return (%)	1.71 (b)	3.98	4.95	4.94	1.68	.01
Ratios/Supplemental Data (%):
Ratio of total expenses to average net assets	.31 (c)	.31	.31	.30	.30	.31
Ratio of net expenses to average net assets(d)	.28 (c)	.28 (e)	.28 (e)	.27 (e)	.25 (e)	.06
Ratio of net investment income to average net assets(d)	3.43 (c)	3.89 (e)	4.83 (e)	4.83 (e)	1.08 (e)	.01
Net Assets, end of period ($ x 1,000)	4,847,699	5,485,850	4,416,832	4,238,417	3,455,742	9,670,384

(a)	Amount represents less than $.001 per share.
(b)	Not annualized.
(c)	Annualized.
(d)	Amount inclusive of reduction in expenses due to undertaking.
(e)	Amount inclusive of reduction in fees due to earnings credits.

See notes to financial statements.

	Six Months Ended July 31, 2026 (Unaudited)	Year Ended January 31,
Participant Shares	Six Months Ended July 31, 2026 (Unaudited)	2026	2025	2024	2023	2022
Per Share Data ($):
Net asset value, beginning of period	1.00	1.00	1.00	1.00	1.00	1.00
Investment Operations:
Net investment income	.016	.036	.045	.045	.014	.000 (a)
Distributions:
Dividends from net investment income	(.016 )	(.036 )	(.045 )	(.045 )	(.014 )	(.000 )(a)
Net asset value, end of period	1.00	1.00	1.00	1.00	1.00	1.00
Total Return (%)	1.56 (b)	3.67	4.64	4.63	1.45	.01
Ratios/Supplemental Data (%):
Ratio of total expenses to average net assets	.60 (c)	.60	.60	.60	.60	.60
Ratio of net expenses to average net assets(d)	.57 (c)	.57 (e)	.57 (e)	.57 (e)	.46 (e)	.05
Ratio of net investment income to average net assets(d)	3.13 (c)	3.61 (e)	4.60 (e)	4.51 (e)	1.11 (e)	.01
Net Assets, end of period ($ x 1,000)	2,776,893	3,019,275	3,293,112	5,434,017	2,313,589	4,801,362

(a)	Amount represents less than $.001 per share.
(b)	Not annualized.
(c)	Annualized.
(d)	Amount inclusive of reduction in expenses due to undertaking.
(e)	Amount inclusive of reduction in fees due to earnings credits.

See notes to financial statements.

FINANCIAL HIGHLIGHTS (continued)

	Six Months Ended July 31, 2026 (Unaudited)	Year Ended January 31,
Wealth Shares	Six Months Ended July 31, 2026 (Unaudited)	2026	2025	2024	2023	2022
Per Share Data ($):
Net asset value, beginning of period	1.00	1.00	1.00	1.00	1.00	1.00
Investment Operations:
Net investment income	.016	.037	.047	.047	.015	.000 (a)
Distributions:
Dividends from net investment income	(.016 )	(.037 )	(.047 )	(.047 )	(.015 )	(.000 )(a)
Net asset value, end of period	1.00	1.00	1.00	1.00	1.00	1.00
Total Return (%)	1.63 (b)	3.81	4.78	4.77	1.55	.01
Ratios/Supplemental Data (%):
Ratio of total expenses to average net assets	.47 (c)	.47	.47	.47	.47	.48
Ratio of net expenses to average net assets(d)	.44 (c)	.44 (e)	.44 (e)	.44 (e)	.37 (e)	.06
Ratio of net investment income to average net assets(d)	3.26 (c)	3.74 (e)	4.66 (e)	4.69 (e)	1.06 (e)	.01
Net Assets, end of period ($ x 1,000)	306,972	336,197	300,202	261,181	216,893	534,237

(a)	Amount represents less than $.001 per share.
(b)	Not annualized.
(c)	Annualized.
(d)	Amount inclusive of reduction in expenses due to undertaking.
(e)	Amount inclusive of reduction in fees due to earnings credits.

See notes to financial statements.

	Six Months Ended July 31, 2026 (Unaudited)	Year Ended January 31,
Service Shares	Six Months Ended July 31, 2026 (Unaudited)	2026	2025	2024	2023	2022
Per Share Data ($):
Net asset value, beginning of period	1.00	1.00	1.00	1.00	1.00	1.00
Investment Operations:
Net investment income	.014	.032	.041	.041	.012	.000 (a)
Distributions:
Dividends from net investment income	(.014 )	(.032 )	(.041 )	(.041 )	(.012 )	(.000 )(a)
Net asset value, end of period	1.00	1.00	1.00	1.00	1.00	1.00
Total Return (%)	1.36 (b)	3.26	4.23	4.21	1.17	.01
Ratios/Supplemental Data (%):
Ratio of total expenses to average net assets	1.00 (c)	1.01	1.01	1.01	1.01	1.02
Ratio of net expenses to average net assets(d)	.97 (c)	.98 (e)	.98 (e)	.98 (e)	.79 (e)	.06
Ratio of net investment income to average net assets(d)	2.73 (c)	3.22 (e)	4.13 (e)	4.10 (e)	1.23 (e)	.01
Net Assets, end of period ($ x 1,000)	2,559,729	3,145,790	3,058,315	2,812,179	2,312,388	1,893,407

(a)	Amount represents less than $.001 per share.
(b)	Not annualized.
(c)	Annualized.
(d)	Amount inclusive of reduction in expenses due to undertaking.
(e)	Amount inclusive of reduction in fees due to earnings credits.

See notes to financial statements.

FINANCIAL HIGHLIGHTS (continued)

Token-Enabled Shares	Six Months Ended July 31, 2026 (Unaudited)	Period Ended January 31, 2026(a)
Per Share Data ($):
Net asset value, beginning of period	1.00	1.00
Investment Operations:
Net investment income	.017	.020
Distributions:
Dividends from net investment income	(.017 )	(.020 )
Net asset value, end of period	1.00	1.00
Total Return (%)	1.76 (b)	2.05 (b)
Ratios/Supplemental Data (%):
Ratio of total expenses to average net assets	.23 (c)	.24 (c)
Ratio of net expenses to average net assets(d)	.18 (c)	.21 (c)
Ratio of net investment income to average net assets(d)	3.53 (c)	3.91 (c)
Net Assets, end of period ($ x 1,000)	130,040	40

(a)	On July 22, 2025, the fund commenced offering Token-Enabled shares.
(b)	Not annualized.
(c)	Annualized.
(d)	Amount inclusive of reduction in expenses due to undertaking.

See notes to financial statements.

NOTES TO FINANCIAL STATEMENTS (Unaudited)

NOTE 1—

Significant Accounting Policies:

BNY Dreyfus Treasury Securities Cash Management (the “fund”), which is registered under the Investment Company Act of 1940, as amended (the “Act”), is a diversified open-end management investment company. The fund’s investment objective is to seek as high a level of current income as is consistent with the preservation of capital and the maintenance of liquidity. BNY Mellon Investment Adviser, Inc. (the “Adviser”), a wholly-owned subsidiary of The Bank of New York Mellon Corporation (“BNY”), serves as the fund’s investment adviser. Dreyfus, a division of Mellon Investments Corporation (the “Sub-Adviser”), an indirect wholly-owned subsidiary of BNY and an affiliate of the Adviser, serves as the fund’s sub-adviser.

Effective May 29, 2026, the fund and the trust changed its name from Dreyfus Treasury Securities Cash Management to BNY Dreyfus Treasury Securities Cash Management.

BNY Mellon Securities Corporation (the “Distributor”), a wholly-owned subsidiary of the Adviser, is the distributor of the fund’s shares, which are sold without a sales charge. The fund is authorized to issue an unlimited number of $.001 par value shares of Beneficial Interest in each of the following classes of shares: Institutional, Investor, Administrative, Participant, Wealth, Service and Token-Enabled. Each share class of the fund except for Token-Enabled shares are subject to a shareholder services plan. Participant and Service shares of the fund are subject to an administrative services plan. Other differences between the classes include the services offered to and the expenses borne by each class, the allocation of certain transfer agency costs and certain voting rights. Income, expenses (other than expenses attributable to a specific class), and realized and unrealized gains or losses on investments are allocated to each class of shares based on its relative net assets.

Investors are required to purchase Token-Enabled shares through BNY, on BNY’s platform. The fund’s transfer agent maintains the official books and records of Token-Enabled shares, with such ownership reflected as an omnibus account for BNY (The Bank of New York Mellon Omnibus Account). BNY will maintain the share ownership records of its clients using its traditional books and records methods, and also will mirror such share ownership via a blockchain system. A “blockchain” is a type of digital database or ledger that facilitates the process of recording transactions and tracking assets in a business network. Unlike the currently implemented traditional books and records maintained by fund transfer agents, including the fund’s transfer agent, a blockchain is a system that allows for the sharing of information across its network. Assets are represented on the blockchain through “tokens,” which are a digital representation of an asset and are built into the blockchain.

The fund operates as a “government money market fund” as that term is defined in Rule 2a-7 under the Act. It is the fund’s policy to maintain a constant net asset value (“NAV”) per share of $1.00, and the fund has adopted certain investment, portfolio valuation and dividend and distribution policies to enable it to do so. There is no assurance, however, that the fund will be able to maintain a constant NAV per share of $1.00.

The Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) is the exclusive reference of authoritative U.S. generally accepted accounting principles (“GAAP”) recognized by the FASB to be applied by nongovernmental entities. Rules and interpretive releases of the SEC under authority of federal laws are also sources of authoritative GAAP for SEC registrants. The fund is an investment company and applies the accounting and reporting guidance of the FASB ASC Topic 946 Financial Services-Investment Companies. The fund’s financial statements are prepared in accordance with GAAP, which may require the use of management estimates and assumptions. Actual results could differ from those estimates.

The fund enters into contracts that contain a variety of indemnifications. The fund’s maximum exposure under these arrangements is unknown. The fund does not anticipate recognizing any loss related to these arrangements.

(a) Portfolio valuation: Investments in securities are valued at amortized cost in accordance with Rule 2a-7 under the Act. If amortized cost is determined not to approximate fair market value, the fair value of the portfolio securities will be determined by procedures established by and under the general oversight of the fund’s Board of Trustees (the “Board”) pursuant to Rule 2a-5 under the Act.

The fair value of a financial instrument is the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (i.e., the exit price). GAAP establishes a fair value hierarchy that prioritizes the inputs of valuation techniques used to measure fair value. This hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements).

NOTES TO FINANCIAL STATEMENTS (Unaudited) (continued)

Additionally, GAAP provides guidance on determining whether the volume and activity in a market has decreased significantly and whether such a decrease in activity results in transactions that are not orderly. GAAP requires enhanced disclosures around valuation inputs and techniques used during annual and interim periods.

Various inputs are used in determining the value of the fund’s investments relating to fair value measurements. These inputs are summarized in the three broad levels listed below:

Level 1—unadjusted quoted prices in active markets for identical investments.

Level 2—other significant observable inputs (including quoted prices for similar investments, interest rates, prepayment speeds, credit risk, etc.).

Level 3—significant unobservable inputs (including the fund’s own assumptions in determining the fair value of investments).

The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities.

Money market securities are valued using amortized cost, in accordance with rules under the Act, which does not take into account unrealized gains or losses. This involves valuing an instrument at its cost and thereafter assuming a constant amortization to maturity of any discount or premium, regardless of the impact of fluctuating interest rates on the market value of the instrument. While this method provides certainty in valuation, it may result in periods during which value, as determined by amortized cost, is higher or lower than the price the fund would receive if it sold the instrument. The Board overseeing this fund has established, as a particular responsibility within the overall duty of care owed to fund investors, procedures reasonably designed to stabilize the fund price per share as computed for the purpose of purchases and redemptions at $1.00. Such procedures include periodic review by the Board of the deviation of the fund NAV calculated by using available market quotations or market equivalents (including valuations obtained from a Service) from the fund $1.00 per share based on amortized cost. A fund cannot guarantee that its NAV will always remain at $1.00 per share. These securities are generally categorized within Level 2 of the fair value hierarchy.

The following is a summary of the inputs used as of July 31, 2026 in valuing the fund’s investments:

	Level 1 - Unadjusted Quoted Prices	Level 2- Other Significant Observable Inputs	Level 3- Significant Unobservable Inputs	Total
Assets ($)
Investments in Securities:†
U.S. Treasury Bills	—	61,527,478,268	—	61,527,478,268
U.S. Treasury Floating Rate Notes	—	9,389,917,220	—	9,389,917,220
U.S. Treasury Notes	—	5,606,827,263	—	5,606,827,263
	—	76,524,222,751	—	76,524,222,751

†	See Schedule of Investments for additional detailed categorizations, if any.

(b) Securities transactions and investment income: Securities transactions are recorded on a trade date basis. Interest income, adjusted for accretion of discount and amortization of premium on investments, is earned from settlement date and is recognized on the accrual basis. Realized gains and losses from securities transactions are recorded on the identified cost basis.

(c) Market Risk: The value of the securities in which the fund invests may be affected by political, regulatory, economic and social developments. In addition, turbulence in financial markets and reduced liquidity in fixed-income markets may negatively affect many issuers, which could adversely affect the fund. Global economies and financial markets are becoming increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies world-wide. Local, regional or global events such as war, military conflicts, acts of terrorism, natural disasters, the spread of infectious illness or other public health issues, recessions, elevated levels of government debt, changes in trade regulation or economic sanctions, internal unrest and discord, or other events could have a significant impact on the fund and its investments.

NOTES TO FINANCIAL STATEMENTS (Unaudited) (continued)

Interest Rate Risk: This risk refers to the decline in the prices of fixed-income securities that may accompany a rise in the overall level of interest rates. A sharp and unexpected rise in interest rates could impair the fund’s ability to maintain a stable net asset value. A wide variety of market factors can cause interest rates to rise, including central bank monetary policy, rising inflation and changes in general economic conditions. It is difficult to predict the pace at which central banks or monetary authorities may increase (or decrease) interest rates or the timing, frequency, or magnitude of such changes. Changing interest rates may have unpredictable effects on markets, may result in heightened market volatility and may detract from fund performance. For floating and variable rate obligations, there may be a lag between an actual change in the underlying interest rate benchmark and the reset time for an interest payment of such an obligation, which could harm or benefit the fund, depending on the interest rate environment or other circumstances.

U.S. Treasury Securities Risk: A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity, but the market prices for such securities are not guaranteed and will fluctuate.

(d) Dividends and distributions to shareholders: It is the policy of the fund to declare dividends daily from net investment income. Such dividends are paid monthly. Dividends from net realized capital gains, if any, are normally declared and paid annually, but the fund may make distributions on a more frequent basis to comply with the distribution requirements of the Internal Revenue Code of 1986, as amended (the “Code”). To the extent that net realized capital gains can be offset by capital loss carryovers, it is the policy of the fund not to distribute such gains.

(e) Federal income taxes: It is the policy of the fund to continue to qualify as a regulated investment company, if such qualification is in the best interests of its shareholders, by complying with the applicable provisions of the Code, and to make distributions of taxable income and net realized capital gain sufficient to relieve it from substantially all federal income and excise taxes.

As of and during the period ended July 31, 2026, the fund did not have any liabilities for any uncertain tax positions. The fund recognizes interest and penalties, if any, related to uncertain tax positions as income tax expense in the Statement of Operations. During the period ended July 31, 2026, the fund did not incur any interest or penalties.

Each tax year in the three-year period ended January 31, 2026 remains subject to examination by the Internal Revenue Service and state taxing authorities.

The fund is permitted to carry forward capital losses for an unlimited period. Furthermore, capital loss carryovers retain their character as either short-term or long-term capital losses.

The fund has an unused capital loss carryover of $1,676,642 available for federal income tax purposes to be applied against future net realized capital gains, if any, realized subsequent to January 31, 2026. These short-term capital losses can be carried forward for an unlimited period.

The tax character of distributions paid to shareholders during the fiscal year ended January 31, 2026 was as follows: ordinary income $2,472,142,081. The tax character of current year distributions will be determined at the end of the current fiscal year.

At July 31, 2026, the cost of investments for federal income tax purposes was substantially the same as the cost for financial reporting purposes (see the Schedule of Investments).

(f) Operating segment reporting: In accordance with FASB Accounting Standards Update 2023-07, Segment Reporting (Topic 280) - Improvements to Reportable Segment Disclosures (“ASU 2023-07”), the fund has operated and been managed as a single reportable segment, generating returns through dividends, interest, and/or gains from investments aligned with its single stated investment objective as outlined in the fund’s prospectus. The fund’s accounting policies are consistent with those described in these Notes to Financial Statements. The chief operating decision maker (“CODM”) is represented by BNY Investments and is comprised of Senior Management and Directors of BNY Investments. The CODM considers the net increase in net assets resulting from operations when deciding whether to purchase additional investments or make distributions to shareholders. Detailed financial information for the fund is presented in these financial statements, including total assets and liabilities in the Statement of Assets and Liabilities, investments held in the Schedule of Investments, results of operations and significant segment expenses in the Statement of Operations, and additional performance information—such as total return, portfolio turnover, and ratios—in the Financial Highlights.

NOTE 2—

Management Fee, Sub-Advisory Fee and Other Transactions with Affiliates:

(a) Pursuant to a management agreement with the Adviser, the management fee is computed at the annual rate of .20% of the value of the fund’s average daily net assets and is payable monthly.

NOTES TO FINANCIAL STATEMENTS (Unaudited) (continued)

The Adviser has contractually agreed, from February 1, 2026 through June 1, 2027, to waive receipt of a portion of its management fee in the amount of .03% of the value of the fund’s average daily net assets. On or after June 1, 2027, the Adviser may terminate this waiver agreement at any time. In addition, the Adviser has also contractually agreed, from February 1, 2026 through June 1, 2027, to waive receipt of its fees and/or assume the direct expenses of the fund so that the direct expenses of the fund’s Wealth and Service shares (excluding taxes, brokerage commissions and extraordinary expenses) do not exceed .47% and 1.01%, respectively, of the value of the applicable share class’ 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. On or after June 1, 2027, the Adviser may terminate this expense limitation agreement at any time.

The Adviser has agreed, from February 2, 2026 through January 31, 2027, 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.

The reduction in expenses, pursuant to these undertakings, amounted to $10,675,759 during the period ended July 31, 2026.

Pursuant to a sub-investment advisory agreement between the Adviser and the Sub-Adviser, the Adviser pays to the Sub-Adviser a monthly fee of 50% of the monthly management fee the Adviser receives from the fund with respect to the value of the sub-advised net assets of the fund, net of any fee waivers and/or expense reimbursements made by the Adviser.

(b) Under the compensation shareholder services plan with respect to Investor, Administrative, Participant, Wealth and Service shares (the “Compensation Shareholder Services Plan”), Investor, Administrative, Participant, Wealth and Service shares pay the Distributor at an annual rate of .25%, .10%, .25%, .25% and .25%, respectively, of the value of the average daily net assets of its shares for the provision of certain services. The services provided may include personal services relating to shareholder accounts, such as answering shareholder inquiries regarding the fund, and services related to the maintenance of shareholder accounts. The Distributor may make payments to service agents with respect to these services. The Distributor determines the amounts to be paid to service agents. During the period ended July 31, 2026, Investor, Administrative, Participant, Wealth and Service shares were charged $1,992,585, $2,507,739, $3,531,787, $395,919 and $3,721,628, respectively, pursuant to each of their respective Compensation Shareholder Services Plan.

Under the reimbursement shareholder services plan with respect to its Institutional shares (the “Reimbursement Shareholder Services Plan”), Institutional shares reimburse the Distributor at an amount not to exceed an annual rate of .25% of the value of the average daily net assets of its shares for certain allocated expenses of providing certain services to the holders of Institutional shares. The services provided may include personal services relating to shareholder accounts, such as answering shareholder inquiries regarding Institutional shares of the fund, and services related to the maintenance of shareholder accounts. During the period ended July 31, 2026, Institutional shares were charged $89,311 pursuant to the Reimbursement Shareholder Services Plan.

(c) Under the administrative services plan with respect to Participant and Service shares (the “Administrative Services Plan”), pursuant to which the fund may pay the Distributor for the provision of certain type of recordkeeping and other related services (which are not services for which a “service fee” as defined under the Conduct Rules of FINRA is intended to compensate). Pursuant to the Administrative Services Plan, the fund will pay the Distributor at an annual rate of .15% and .55%, respectively, of the value of their average daily net assets attributable to the fund’s Participant and Service shares for the provision of such services, which include, at a minimum: mailing periodic reports, prospectuses and other fund communications to beneficial owners; client onboarding; anti-money laundering and related regulatory oversight; manual transaction processing; transmitting wires; withholding on dividends and distributions as may be required by state or Federal authorities from time to time; receiving, tabulating, and transmitting proxies executed by beneficial owners; fund statistical reporting; technical support; business continuity support; and blue sky support. During the period ended July 31, 2026, Participant and Service shares were charged $2,119,072 and $8,187,581, pursuant to the Administrative Services Plan.

The fund has an arrangement with BNY Mellon Transfer, Inc., (the “Transfer Agent”), a subsidiary of BNY and an affiliate of the Adviser, whereby the fund may receive earnings credits when positive cash balances are maintained, which are used to offset Transfer Agent fees. For financial reporting purposes, the fund includes transfer agent net earnings credits, if any, as an expense offset in the Statement of Operations.

NOTES TO FINANCIAL STATEMENTS (Unaudited) (continued)

The fund has an arrangement with The Bank of New York Mellon (the “Custodian”), a subsidiary of BNY and an affiliate of the Adviser, whereby the fund will receive interest income or be charged overdraft fees when cash balances are maintained. For financial reporting purposes, the fund includes this interest income and overdraft fees, if any, as interest income in the Statement of Operations.

The fund compensates the Transfer Agent, under a transfer agency agreement, for providing transfer agency and cash management services for the fund. The majority of Transfer Agent fees are comprised of amounts paid on a per account basis, while cash management fees are related to fund subscriptions and redemptions. During the period ended July 31, 2026, the fund was charged $23,231 for transfer agency services. These fees are included in Shareholder servicing costs in the Statement of Operations.

The fund compensates the Custodian, under a custody agreement, for providing custodial services for the fund. These fees are determined based on net assets, geographic region and transaction activity. During the period ended July 31, 2026, the fund was charged $332,086 pursuant to the custody agreement.

The fund compensates the Custodian, under a shareholder redemption draft processing agreement, for providing certain services related to the fund’s check writing privilege. During the period ended July 31, 2026, the fund was charged $1,542 pursuant to the agreement, which is included in Shareholder servicing costs in the Statement of Operations.

During the period ended July 31, 2026, the fund was charged $18,137 for services performed by the fund’s Chief Compliance Officer and his staff. These fees are included in Chief Compliance Officer fees in the Statement of Operations.

The fund compensates the Custodian for providing shareholder reporting and regulatory services for the fund. These fees are included in shareholder and regulatory reports service fees in the Statement of Operations. During the period ended July 31, 2026, the Custodian was compensated $5,750 for financial reporting and regulatory services.

The components of “Due to BNY Mellon Investment Adviser, Inc. and affiliates” in the Statement of Assets and Liabilities consist of: management fee of $12,559,029, Administrative Services Plan fees of $1,624,811, Shareholder Services Plans fees of $1,973,400, Custodian fees of $330,000, Chief Compliance Officer fees of $2,388, Transfer Agent fees of $11,378, checkwriting fees of $300 and shareholder and regulatory reports service fees of $4,792, which are offset against an expense reimbursement currently in effect in the amount of $1,891,350.

(d) Each board member of the fund also serves as a board member of other funds in the BNY Mellon Family of Funds complex. Annual retainer fees and attendance fees are allocated to each fund based on net assets.

Item 8. Changes in and Disagreements with Accountants for Open-End Management Investment Companies (Unaudited)

N/A

Item 9. Proxy Disclosures for Open-End Management Investment Companies (Unaudited)

N/A

Item 10. Remuneration Paid to Directors, Officers, and Others of Open-End Management Investment Companies (Unaudited)

Each board member also serves as a board member of other funds in the BNY Mellon Family of Funds complex, and annual retainer fees and meeting attendance fees are allocated to each fund based on net assets. The fund is charged for services performed by the fund’s Chief Compliance Officer. Compensation paid by the fund during the period to the board members and the Chief Compliance Officer are within Item 7. Statement of Operations as Trustees’ fees and expenses and Chief Compliance Officer fees, respectively. The aggregate amount of Trustees’ fees and expenses and Chief Compliance Officer fees paid by the fund during the period was $149,343.

Item 11. Statement Regarding Basis for Approval of Investment Advisory Contracts (Unaudited)

At a meeting of the fund’s Board of Trustees (the “Board”) held on May 26 2026, the Board considered the renewal of the fund’s Management Agreement, pursuant to which the Adviser provides the fund with investment advisory and administrative services, and the Sub-Investment Advisory Agreement (together with the Management Agreement, the “Agreements”), pursuant to which Dreyfus, a division of Mellon Investments Corporation (the “Sub-Adviser”), provides day-to-day management of the fund’s investments. The Board members, none of whom are “interested persons” (as defined in the Investment Company Act of 1940, as amended) of the fund (“Independent Trustees”), were assisted in their review by independent legal counsel and met with counsel in executive session separate from representatives of the Adviser and the Sub-Adviser. In considering the renewal of the Agreements, the Board considered several factors that it believed to be relevant, including those discussed below. The Board did not identify any one factor as dispositive, and each Board member may have attributed different weights to the factors considered.

Analysis of Nature, Extent and Quality of Services Provided to the Fund. The Board considered information provided to it at the meeting and in previous presentations from representatives of the Adviser regarding the nature, extent and quality of the services provided to funds in the BNY fund complex, including the fund. The Adviser provided the number of open accounts in the fund, the fund’s asset size and the allocation of fund assets among distribution channels. The Adviser also had previously provided information regarding the diverse intermediary relationships and distribution channels of funds in the BNY fund complex (such as retail direct or intermediary, in which intermediaries typically are paid by the fund and/or the Adviser) and the Adviser’s corresponding need for broad, deep, and diverse resources to be able to provide ongoing shareholder services to each intermediary or distribution channel, as applicable to the fund.

The Board also considered research support available to, and portfolio management capabilities of, the fund’s portfolio management personnel and that the Adviser also provides oversight of day-to-day fund operations, including fund accounting and administration and assistance in meeting legal and regulatory requirements. The Board also considered the Adviser’s extensive administrative, accounting and compliance infrastructures, as well as the Adviser’s supervisory activities over the Sub-Adviser.

Comparative Analysis of the Fund’s Performance and Management Fee and Expense Ratio. The Board reviewed reports prepared by Broadridge Financial Solutions, Inc. (“Broadridge”), an independent provider of investment company data based on classifications provided by Thomson Reuters Lipper (“Lipper”), which included information comparing (1) the performance of the fund’s Institutional shares with the performance of a group of institutional U.S. Treasury money market funds selected by Broadridge as comparable to the fund (the “Performance Group”) and with a broader group of funds consisting of all institutional U.S. Treasury money market funds (the “Performance Universe”), all for various periods ended March 31, 2026, and (2) the fund’s actual and contractual management fees and total expenses with those of the same group of funds in the Performance Group (the “Expense Group”) and with a broader group of funds consisting of institutional U.S. Treasury money market funds, excluding outliers (the “Expense Universe”), the information for which was derived in part from fund financial statements available to Broadridge as of the date of its analysis. The Performance Group and Performance Universe comparisons were provided based on both “gross” (i.e., without including fees and expenses) and “net” (i.e., including fees and expenses) total returns. The Adviser previously had furnished the Board with a description of the methodology Broadridge used to select the Performance Group and Performance Universe and the Expense Group and Expense Universe.

Performance Comparisons. Representatives of the Adviser stated that the usefulness of performance comparisons may be affected by a number of factors, including different investment limitations and policies that may be applicable to the fund and comparison funds and the end date selected. The Board also considered the fund’s performance in light of overall financial market conditions. The Board discussed with representatives of the Adviser and the Sub-Adviser the results of the comparisons and considered that the fund’s gross total return performance was at or slightly below the Performance Group median for all periods, and was slightly below the Performance Universe median for all periods. The Board also considered that the fund’s net total return performance was at the Performance Group median for all periods, and was above the Performance Universe median for all periods. The Board considered the relative proximity of the fund’s gross and net total return performance to the Performance Group and/or Performance Universe medians during the periods under review.

Management Fee and Expense Ratio Comparisons. The Board reviewed and considered the contractual management fee rate payable by the fund to the Adviser in light of the nature, extent and quality of the management services and the sub-advisory services provided by the Adviser and the Sub-Adviser, respectively. In addition, the Board reviewed and considered the actual management fee rate paid by

Item 11. Statement Regarding Basis for Approval of Investment Advisory Contracts (Unaudited) (continued)

the fund over the fund’s last fiscal year, which included reductions for a fee waiver arrangement in place that reduced the management fee paid to the Adviser. The Board also reviewed the range of actual and contractual management fees and total expenses as a percentage of average net assets of the Expense Group and Expense Universe funds and discussed the results of the comparisons.

The Board considered that the fund’s contractual management fee was equal to the Expense Group median contractual management fee, the fund’s actual management fee was approximately equivalent to the Expense Group median and slightly higher than the Expense Universe median actual management fee, and the fund’s total expenses were approximately equivalent to the Expense Group median and lower than the Expense Universe median total expenses.

Representatives of the Adviser stated that the Adviser has contractually agreed, until May 31, 2027, to waive receipt of a portion of its management fees in the amount of 0.03% of the value of the fund’s average daily net assets.

Representatives of the Adviser reviewed with the Board the management or investment advisory fees paid by funds advised by the Adviser that are in the same Lipper category as the fund (the “Similar Funds”), and explained the nature of the Similar Funds. They discussed differences in fees paid and the relationship of the fees paid in light of any differences in the services provided and other relevant factors. The Board considered the relevance of the fee information provided for the Similar Funds to evaluate the appropriateness of the fund’s management fee. Representatives of the Adviser noted that there were no separate accounts and/or other types of client portfolios advised by the Adviser or the Sub-Adviser that are considered to have similar investment strategies and policies as the fund.

The Board considered the fee payable to the Sub-Adviser in relation to the fee payable to the Adviser by the fund and the respective services provided by the Sub-Adviser and the Adviser. The Board also took into consideration that the Sub-Adviser’s fee is paid by the Adviser, out of its fee from the fund, and not the fund.

Analysis of Profitability and Economies of Scale. Representatives of the Adviser reviewed the expenses allocated and profit received by the Adviser and its affiliates and the resulting profitability percentage for managing the fund and the aggregate profitability percentage to the Adviser and its affiliates for managing the funds in the BNY fund complex, and the method used to determine the expenses and profit. The Board concluded that the profitability results were not excessive, given the services rendered and service levels provided by the Adviser and its affiliates. The Board also considered the fee waiver arrangement and its effect on the profitability of the Adviser and its affiliates. The Board also had been provided with information prepared by an independent consulting firm regarding the Adviser’s approach to allocating costs to, and determining the profitability of, individual funds and the entire BNY fund complex. The consulting firm also had analyzed where any economies of scale might emerge in connection with the management of a fund.

The Board considered, on the advice of its counsel, the profitability analysis (1) as part of its evaluation of whether the fees under the Agreements, considered in relation to the mix of services provided by the Adviser and the Sub-Adviser, including the nature, extent and quality of such services, supported the renewal of the Agreements and (2) in light of the relevant circumstances for the fund and the extent to which economies of scale would be realized if the fund grows and whether fee levels reflect these economies of scale for the benefit of fund shareholders. Representatives of the Adviser stated that, as a result of shared and allocated costs among funds in the BNY fund complex, the extent of economies of scale could depend substantially on the level of assets in the complex as a whole, so that increases and decreases in complex-wide assets can affect potential economies of scale in a manner that is disproportionate to, or even in the opposite direction from, changes in the fund’s asset level. The Board also considered potential benefits to the Adviser and the Sub-Adviser from acting as investment adviser and sub-adviser, respectively, and took into consideration that there were no soft dollar arrangements in effect for trading the fund’s investments.

At the conclusion of these discussions, the Board agreed that it had been furnished with sufficient information to make an informed business decision with respect to the renewal of the Agreements. Based on the discussions and considerations as described above, the Board concluded and determined as follows.

●The Board concluded that the nature, extent and quality of the services provided by the Adviser and the Sub-Adviser are satisfactory and appropriate.

●The Board was generally satisfied with the fund’s overall performance.

●The Board concluded that the fees paid to the Adviser and the Sub-Adviser continued to be appropriate under the circumstances and in light of the factors and the totality of the services provided as discussed above.

●The Board determined that the economies of scale which may accrue to the Adviser and its affiliates in connection with the management of the fund had been adequately considered by the Adviser in connection with the fee rate charged to the fund pursuant to the Management Agreement and that, to the extent in the future it were determined that material economies of scale had not been shared with the fund, the Board would seek to have those economies of scale shared with the fund.

In evaluating the Agreements, the Board considered these conclusions and determinations and also relied on its previous knowledge, gained through meetings and other interactions with the Adviser and its affiliates and the Sub-Adviser, of the Adviser and the Sub-Adviser and the services provided to the fund by the Adviser and the Sub-Adviser. The Board also relied on information received on a routine and regular basis throughout the year relating to the operations of the fund and the investment management and other services provided under the Agreements, including information on the investment performance of the fund in comparison to similar mutual funds and benchmark performance measures; general market outlook as applicable to the fund; and compliance reports. In addition, the Board’s consideration of the contractual fee arrangements for the fund had the benefit of a number of years of reviews of the Agreements for the fund, or substantially similar agreements for other BNY funds that the Board oversees, during which lengthy discussions took place between the Board and representatives of the Adviser. Certain aspects of the arrangements may receive greater scrutiny in some years than in others, and the Board’s conclusions may be based, in part, on its consideration of the fund’s arrangements, or substantially similar arrangements for other BNY funds that the Board oversees, in prior years. The Board determined to renew the Agreements.

Code-0761NCSRSA0726A

Item 12.

Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies.

Not applicable.

Item 13.

Portfolio Managers for Closed-End Management Investment Companies.

Not applicable.

Item 14.

Purchases of Equity Securities By Closed-End Management Investment Companies and Affiliated Purchasers.

Not applicable.

Item 15.

Submission of Matters to a Vote of Security Holders.

There have been no materials changes to the procedures applicable to Item 15.

Item 16.

Controls and Procedures.

(a)

The Registrant's principal executive and principal financial officers have concluded, based on their evaluation of the Registrant's disclosure controls and procedures as of a date within 90 days of the filing date of this report, that the Registrant's disclosure controls and procedures are reasonably designed to ensure that information required to be disclosed by the Registrant on Form N-CSR is recorded, processed, summarized and reported within the required time periods and that information required to be disclosed by the Registrant in the reports that it files or submits on Form N-CSR is accumulated and communicated to the Registrant's management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure.

(b)

There were no changes to the Registrant's internal control over financial reporting that occurred during the period covered by this report that have materially affected, or are reasonably likely to materially affect, the Registrant's internal control over financial reporting.

Item 17.

Disclosure of Securities Lending Activities for Closed-End Management Investment Companies.

Not applicable.

Item 18.

Recovery of Erroneously Awarded Compensation.

Not applicable.

Item 19.

Exhibits.

(a)(1) Not applicable.

(a)(2) Not applicable.

(a)(3) Certifications of principal executive and principal financial officers as required by Rule 30a-2(a) under the Investment Company Act of 1940.

(a)(4) Not applicable.

(a)(5) Not applicable.

(b) Certification of principal executive and principal financial officers as required by Rule 30a-2(b) under the Investment Company Act of 1940.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the Registrant has duly caused this Report to be signed on its behalf by the undersigned, thereunto duly authorized.

BNY Dreyfus Treasury Securities Cash Management

By: /s/ David J. DiPetrillo

David J. DiPetrillo

President (Principal Executive Officer)

Date: September 24, 2026

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this Report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

By: /s/ David J. DiPetrillo

David J. DiPetrillo

President (Principal Executive Officer)

Date: September 24, 2026

By: /s/ James Windels

James Windels

Treasurer (Principal Financial Officer)

Date: September 24, 2026

EXHIBIT INDEX

(a)(3) Certifications of principal executive and principal financial officers as required by Rule 30a-2(a) under the Investment Company Act of 1940. (EX-99.CERT)

(b) Certification of principal executive and principal financial officers as required by Rule 30a-2(b) under the Investment Company Act of 1940. (EX-99.906CERT)