UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

~~Securities~~Date ~~Exchange~~of ~~Act~~Report (Date of ~~1934~~Earliest Event Reported): March 27, 2026

Date of Report (Date of Earliest Event Reported): April 7, 2025

iShares® Bitcoin Trust ETF

(Exact name of registrant as specified in its charter)

New York	001-41914	93-6461129
(State or other jurisdiction of incorporation)	(Commission File Number)	(I.R.S. Employer Identification No.)
	c/o iShares Delaware Trust Sponsor LLC 400 Howard Street San Francisco, California 94105
	(Address of principal executive offices)

Delaware
(State or other jurisdiction of

incorporation)

001-41914
(Commission File Number)

93-6461129
(I.R.S. Employer Identification

No.)

c/o iShares Delaware Trust Sponsor LLC
400 Howard Street
San Francisco, California 94105
(Address of Principal Executive Offices)

Registrant’s telephone number, including area code: (415) 670-2000

Not Applicable Former name or former address, if changed since last report

Former name or former address, if changed since last report

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-‑2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-‑4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Shares	IBIT	The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☒☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

IfItem an5.02. ~~emerging~~Departure ~~growth~~of ~~company,~~Directors ~~indicate~~or byCertain ~~check~~Officers; ~~mark~~Election ifof ~~the~~Directors; ~~registrant~~Appointment ~~has~~of ~~elected~~Certain ~~not~~Officers; toCompensatory ~~use~~Arrangements ~~the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a)~~ of ~~the~~Certain ~~Exchange Act~~Officers. ☒

~~Item~~On 1March 27, 2026, Jay Jacobs was appointed to the Board of Directors of iShares Delaware Trust Sponsor LLC (the “Sponsor”), which is the sponsor of iShares® Bitcoin Trust ETF (the “Trust”).01 ~~Entry~~Mr. ~~into~~Jacobs awas ~~Material~~appointed ~~Definitive~~by ~~Agreement~~BlackRock Asset Management International Inc., which is the member of the Sponsor. Also on March 27, 2026, Mr. Jacobs was appointed as the President and Chief Executive Officer of the Sponsor.

OnMr. ~~April~~Jacobs 7,is ~~2025~~a Managing Director of BlackRock, Inc. (“BlackRock”) ~~Fund~~and ~~Advisors,~~has served as ~~administrative~~the ~~trustee~~U.S. Head of ~~iShares~~Equity ~~Bitcoin~~ETFs ~~Trust~~at ~~ETF~~BlackRock ~~(the~~since ~~"Trust")~~April ~~entered~~7, ~~into~~2025. aIn ~~custodial~~this ~~services~~role, ~~agreement~~he (oversees the ~~"Anchorage~~overall ~~Custodian~~product ~~Agreement")~~strategy, ~~with~~thought ~~Anchorage~~leadership, ~~Digital~~and ~~Bank~~client Nengagement for BlackRock’s U.AS. ~~("Anchorage"~~ orindex ~~the~~and ~~"Additional~~active ~~Bitcoin~~equity ~~Custodian"),~~ETF abusiness. ~~national~~Mr. ~~trust~~Jacobs ~~bank~~joined ~~chartered~~BlackRock byas ~~the~~U.S. ~~Office~~Head of ~~the~~Thematics ~~Comptroller~~and ofActive ~~the~~Equity ~~Currency~~ETFs on April 18, 2022. ~~Pursuant~~From toMay ~~the~~2013 ~~Anchorage~~to ~~Custodian~~March ~~Agreement~~2022, ~~Anchorage~~he ~~will~~worked ~~establish~~at ~~and~~Global ~~maintain~~X ~~one~~ETFs, orwhere ~~more~~he ~~segregated~~founded ~~custody~~and ~~accounts,~~led ~~controlled~~the firm’s research and ~~secured~~strategy byteam. ~~Anchorage~~Previously, onMr. ~~its~~Jacobs ~~books~~was ~~which~~a ~~will~~business ~~have~~analyst at the ~~ability~~New York Stock Exchange from July 2011 to ~~support~~May ~~the~~2013. ~~receipt,~~Mr. ~~safekeeping,~~Jacobs earned a BA degree in International Studies from Emory University and ~~maintenance~~an ofMBA ~~the~~from ~~Trust’s~~Columbia ~~bitcoin~~Business ~~holdings~~School. He is a CFA charterholder.

~~The~~In ~~Trust’s~~addition, ~~existing~~effective ~~custody~~March ~~arrangement with Coinbase Inc.~~27, ~~Coinbase Custody Trust Company and other Coinbase entities (collectively~~2026, ~~"Coinbase")~~Shannon ~~will~~Ghia ~~remain~~resigned inas ~~force~~a ~~and~~Director ~~is unaffected by the Trust's entry into the Anchorage Custodian Agreement. The Trust is not required to hold any particular amount~~ of ~~assets at either Coinbase or~~ the ~~Additional~~Sponsor ~~Bitcoin Custodian,~~ and ~~the Sponsor shall, in its sole discretion, determine the amounts held at either custodian~~ as ~~permitted~~President byand ~~the~~Chief ~~Trust~~Executive ~~Agreement.~~Officer Atof the ~~current time, the~~ Sponsor. ~~has~~Ms. ~~no plans to move any of the Trust~~Ghia’s ~~bitcoin~~decision to ~~the~~resign ~~Additional~~was ~~Bitcoin~~not ~~Custodian.~~the ~~The~~result ~~addition~~ of ~~the~~any ~~Additional~~dispute ~~Bitcoin~~or ~~Custodian~~disagreement ~~reflects~~with the Sponsor’s ~~ongoing~~or ~~risk~~the ~~management~~Trust ~~approach~~on asany ~~part~~matter ofrelating to the Trust’'s ~~growing~~operations, ~~size~~policies ~~and~~or ~~the Sponsor’s expanding presence in the digital asset space~~practices.

Under the Anchorage Custodian Agreement, the Additional Bitcoin Custodian is required to keep all of the private keys associated with the Trust’s bitcoin held at the Additional Bitcoin Custodian in cold storage. Cold storage is a safeguarding method by which the private key(s) corresponding to bitcoin is (are) generated and stored in an offline manner. Private keys are generated in offline computers or devices that are not connected to the internet so that they are more resistant to being hacked. By contrast, in hot storage, the private keys are held online, where they are more accessible, leading to more efficient transfers, though they are potentially more vulnerable to being hacked.

In the event of a fork, the Anchorage Custodian Agreement provides that the Additional Bitcoin Custodian may temporarily suspend services, and may, in their sole discretion, determine whether or not to support (or cease supporting) either branch of the forked protocol entirely, provided that the Additional Bitcoin Custodian shall use commercially reasonable efforts to avoid ceasing to support both branches of such forked protocol. The Anchorage Custodian Agreement requires the Trust to indemnify Anchorage and its respective officers, directors, agents, employees and representatives against certain losses arising or related to the Trust’s material breach of the Anchorage Custodian Agreement, violation of applicable law, gross negligence, fraud, or wilful misconduct. The Anchorage Custodian Agreement also requires Anchorage to maintain certain insurance policies and coverage.

The foregoing description of the Anchorage Custodian Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the Anchorage Custodian Agreement, which has been filed with this Current Report on Form 8-K as Exhibit 10.1.

Item 9.01 Financial Statements and Exhibits.

(d)	Exhibits.
Exhibit No.		Description
10.1		Master Custody Service Agreement dated as of April 7, 2025, by and between Anchorage Digital Bank N.A. and BlackRock Fund Advisors, in its capacity as agent to iShares Bitcoin Trust ETF
104		Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: ~~April~~March 831, ~~2025~~2026

iShares® Bitcoin Trust ETF* By: iShares Delaware Trust Sponsor LLC By: /s/ Bryan Bowers Name: Bryan Bowers Title: Director and Chief Financial Officer

* The registrant is a trust. The individual specified above is signing in ~~her~~his capacity as an officer and/or authorized signatory of iShares Delaware Trust Sponsor LLC, the ~~sponsor~~Sponsor of the Trust.

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