Welcome to our dedicated page for ARK 21Shares Bitcoin ETF SEC filings (Ticker: ARKB), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
ARK 21Shares Bitcoin ETF filings document the Trust's bitcoin custody arrangements, material service agreements, listed share structure, and exchange registration details. The 8-K record identifies ARKB common shares of beneficial interest on Cboe BZX and discloses a custodial services agreement with BitGo Trust Company for segregated custody accounts used to receive, safeguard, and maintain the Trust's bitcoin holdings.
ARK 21Shares Bitcoin ETF reported a sharp decline in value for the quarter ended March 31, 2026, as bitcoin prices fell. Net assets dropped from $3.31 billion to $2.39 billion, a 27.73% decrease, while the bitcoin price used for GAAP NAV fell about 22.56% over the period.
The Trust held 35,246.5837 bitcoins at quarter‑end, all classified as Level 1 fair value. Net decrease in net assets from operations was $(716.8) million, driven mainly by unrealized depreciation of bitcoin and realized losses on coins sold for redemptions and fees. The ETF delivered a Q1 total return of -22.61% at NAV, consistent with its passive objective to track bitcoin minus a 0.21% annual Sponsor Fee.
ARK 21Shares Bitcoin ETF files its annual report describing how the trust tracks the price of bitcoin and outlining key operational and risk details. The ETF holds bitcoin in custody with multiple regulated custodians, values its shares daily using the CME CF Bitcoin Reference Rate – New York Variant, and issues and redeems shares in 5,000‑share baskets through authorized participants.
The trust charges a unitary 0.21% Sponsor Fee, largely paid in bitcoin, which covers most operating expenses; this fee was fully waived until trust assets first exceeded $1 billion in February 2024. As of June 30, 2025, shares held by non‑affiliates were valued at $5.03 billion, and there were 107,550,000 shares outstanding as of February 26, 2026.
The filing emphasizes that the ETF is a passive grantor trust concentrated solely in bitcoin, not registered under the Investment Company Act or regulated as a commodity pool. It details extensive cybersecurity, custody, and prime brokerage arrangements, while highlighting significant risks from bitcoin price volatility, exchange failures, market manipulation, regulatory changes, tax treatment uncertainties, and limited investor rights, including minimal voting powers and broad indemnification protections for the sponsor and service providers.
ARK 21Shares Bitcoin ETF reported two key operational updates affecting how it holds bitcoin and processes share creations and redemptions. On December 12, 2025, the fund entered into a new Custodial Services Agreement with BitGo Trust Company, Inc., under which BitGo will maintain segregated custody accounts for the ETF’s bitcoin, keep reasonable insurance coverage, and provide safekeeping services. The ETF must indemnify BitGo and certain affiliates in specified circumstances.
The sponsor will continue to use existing custodians Coinbase Custody Trust Company, LLC, Anchorage Digital Bank N.A., and BitGo New York Trust Company, LLC, and will allocate bitcoin among them and BitGo Trust Company based on risk, cost, and other factors. On December 16, 2025, the ETF also entered into an Authorized Participant Agreement with Macquarie Capital (USA) Inc., allowing Macquarie to create and redeem 5,000-share baskets, including in-kind orders using bitcoin, with transaction fees generally charged by the sponsor.
ARK 21Shares Bitcoin ETF (ARKB) reported Q3 results anchored by bitcoin price movement and share activity. Net assets were $5,092,934 thousand at September 30, 2025, with NAV per share of $38.00. The Trust held 44,528.1082 bitcoins, valued at $5,093,058 thousand using its principal market price.
For the quarter, the Trust recorded a net increase in net assets from operations of $317,667 thousand, driven by net realized and unrealized gains of $320,440 thousand and sponsor fees of $2,773 thousand. For the nine months ended September 30, 2025, the Trust posted a net increase from operations of $927,779 thousand and total return at NAV of 22.30%. Shares outstanding were 134,040,000 at September 30, 2025; the Trust executed a 3‑for‑1 share split effective June 16, 2025. The Sponsor fee remained 0.21% annually, with $7,584 thousand incurred for the nine-month period.