0001631942 jhct:C000154149Member 2025-12-31 2026-06-30 0001631942 2025-12-31 2026-06-30 0001631942 jhct:C000154149Member 2026-06-30 0001631942 jhct:C000154149Member jhct:Over90DaysMember 2026-06-30 0001631942 us-gaap:RepurchaseAgreementsMember jhct:C000154149Member 2026-06-30 0001631942 jhct:C000154149Member jhct:SixtyOneTo90DaysMember 2026-06-30 0001631942 jhct:C000154149Member jhct:ThirtyOneTo60DaysMember 2026-06-30 0001631942 us-gaap:USGovernmentCorporationsAndAgenciesSecuritiesMember jhct:C000154149Member 2026-06-30 0001631942 us-gaap:USGovernmentDebtSecuritiesMember jhct:C000154149Member 2026-06-30 0001631942 jhct:C000154149Member jhct:ZeroTo30DaysMember 2026-06-30 iso4217:USD pure jhct:Holding 0.042 0.035 0.187 0.736 0001631942 false true N-1A N-CSRS semi-annual shareholder report JOHN HANCOCK COLLATERAL TRUST 2026-06-30 John Hancock Collateral Trust John Hancock Collateral Trust This <span><span class="sec-hidden" style="-sec-ix-hidden:t_11_1f8d1598_4d76_aa75_6993_bbaa28e1d030">semiannual shareholder report</span></span> contains important information about the John Hancock Collateral Trust (the fund) for the period of January 1, 2026 to June 30, 2026. You can find additional information about the fund at <span style="text-decoration-line:underline;color:rgb(0, 0, 0);font-weight:normal;font-size:9pt;font-family:'arial'">jhinvestments.com/collateral-trust</span>. You can also request this information by contacting us at 800-225-5291. jhinvestments.com/collateral-trust 800-225-5291 <div style="margin-top:0px;color:rgb(0, 0, 0);margin-bottom:6pt;font-weight:normal;font-size:9pt;font-family:'arial';"> <b>What were the fund costs during the last </b> <b>six months</b> <b>?</b> </div><div style="margin-top:0px;margin-bottom:0px;color:rgb(0, 0, 0);font-weight:normal;font-size:9pt;font-family:'arial';"> <i>(Based on a hypothetical $10,000 investment)</i> </div><table style="width:100%;border-collapse:collapse;break-inside:avoid"> <tr style="break-after:avoid;break-inside:avoid-page;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt;height:20pt"> <td style="break-inside: avoid-page; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Arial Narrow'; color: rgb(0, 0, 0); font-size: 9pt; font-weight: bold; vertical-align: bottom; text-align: left;">Fund</td> <td style="font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; vertical-align: bottom;"></td> <td style="font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; vertical-align: bottom;"></td> <td style="break-inside: avoid-page; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Arial Narrow'; color: rgb(0, 0, 0); font-size: 9pt; font-weight: bold; vertical-align: bottom;">Costs of a $10,000 investment</td> <td style="break-inside: avoid-page; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Arial Narrow'; color: rgb(0, 0, 0); font-size: 9pt; font-weight: bold; vertical-align: bottom;">Costs paid as a percentage<br/> of a $10,000 investment</td> </tr> <tr style="break-inside:avoid-page;height:20pt;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"> <td style="break-inside: avoid-page; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Arial Narrow'; color: rgb(0, 0, 0); font-size: 9pt; text-align: left; vertical-align: bottom;">Collateral Trust</td> <td style="break-inside: avoid-page; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Arial Narrow'; color: rgb(0, 0, 0); font-size: 9pt;"></td> <td style="break-inside: avoid-page; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Arial Narrow'; color: rgb(0, 0, 0); font-size: 9pt;"></td> <td style="break-inside: avoid-page; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Arial Narrow'; color: rgb(0, 0, 0); font-size: 9pt; vertical-align: bottom;"><span style="float:none">$</span>4</td> <td style="break-inside: avoid-page; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Arial Narrow'; color: rgb(0, 0, 0); font-size: 9pt; white-space: nowrap; vertical-align: bottom;">0.08<span>%</span></td> </tr> </table> 4 0.0008 <div style="color:rgb(0, 0, 0);font-weight:normal;font-size:9pt;font-family:'arial';margin-top:0px;margin-bottom:0px;">Fund Statistics</div><table style="width:100%;border-collapse:collapse;break-inside:avoid"> <tr style="break-inside:avoid-page;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt;height:20pt"> <td style="break-inside: avoid-page; vertical-align: middle; padding-top: 0; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; color: rgb(0, 0, 0); font-size: 9pt; width: 90%; text-align: left; font-family: 'Arial Narrow'; font-weight: bold;">Fund net assets</td> <td style="break-inside: avoid-page; text-align: right; vertical-align: middle; padding-top: 0; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Arial Narrow'; color: rgb(0, 0, 0); font-size: 9pt;"><span style="float:none">$</span>2,599,085,078</td> </tr> <tr style="break-inside:avoid-page;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt;height:20pt"> <td style="break-inside: avoid-page; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; color: rgb(0, 0, 0); font-size: 9pt; width: 90%; text-align: left; font-family: 'Arial Narrow'; font-weight: bold;">Total number of portfolio holdings</td> <td style="break-inside: avoid-page; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Arial Narrow'; color: rgb(0, 0, 0); font-size: 9pt;">103</td> </tr> <tr style="break-inside:avoid-page;height:20pt;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"> <td style="break-inside: avoid-page; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; color: rgb(0, 0, 0); font-size: 9pt; width: 90%; text-align: left; font-family: 'Arial Narrow'; font-weight: bold;">Weighted Average Maturity</td> <td style="break-inside: avoid-page; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Arial Narrow'; color: rgb(0, 0, 0); font-size: 9pt;">48 Days</td> </tr> </table> 2599085078 103 <div style="margin-top:0px;color:rgb(0, 0, 0);margin-bottom:6pt;font-weight:normal;font-size:9pt;font-family:'arial';">Graphical Representation of Holdings</div><div style="margin-top:0px;color:rgb(0, 0, 0);margin-bottom:7pt;font-weight:normal;font-size:9pt;font-family:'arial';">The tables below show the investment makeup of the fund, representing a percentage of the total investments of the fund.</div><div style="margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt;font-family:'arial narrow';color:rgb(0, 0, 0);letter-spacing:1.25px;text-transform:uppercase;font-size:10pt;text-align:center;padding-bottom:0px;font-weight:bold;"> <b>Portfolio Composition</b> </div><table style="width:100%;border-collapse:collapse;break-inside:avoid"> <tr style="break-inside:avoid-page;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt;height:20pt"> <td style="font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; text-align: left;">Repurchase agreement</td> <td style="font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap;">46.4<span>%</span></td> </tr> <tr style="break-inside:avoid-page;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt;height:20pt"> <td style="font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; text-align: left;">U.S. Government Agency</td> <td style="font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap;">45.6<span>%</span></td> </tr> <tr style="break-inside:avoid-page;height:20pt;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"> <td style="font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; text-align: left;">U.S. Government</td> <td style="font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap;">8.0<span>%</span></td> </tr> <tr style="break-inside:avoid-page;height:20pt;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"> <td style="font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid-page; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; text-align: left;"><strong></strong></td> <td style="font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid-page; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt;"></td> </tr> </table><div style="margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt;font-family:'arial narrow';color:rgb(0, 0, 0);letter-spacing:1.25px;text-transform:uppercase;font-size:10pt;text-align:center;padding-bottom:0px;font-weight:bold;"> <b>Maturity Composition</b> </div><div style="font-size:9pt;color:rgb(0, 0, 0);padding-right:6pt;padding-left:6pt;"> <img alt="Graphical Representation - Allocation 1 Chart" src="chartimages_6611655.jpg" style="width: 172.8pt;"/> </div><div style="margin-top:0px;color:rgb(0, 0, 0);font-weight:normal;font-size:9pt;font-family:'arial';margin-bottom:7.5pt;">Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time.</div> 0.464 0.456 0.080