State of Wisconsin’s investment board discloses nearly $100M of BlackRock’s bitcoin ETF

The holdings disclosure is the first from a state investment board

article-image

rblfmr/Shutterstock modified by Blockworks

share

The state of Wisconsin’s investment board disclosed holdings in BlackRock’s bitcoin ETF on Tuesday. 

The 13F filing with the Securities and Exchange Commission shows that the board bought $99 million, or roughly 2.4 million shares, of IBIT. The filing also revealed that the board holds roughly one million shares of Grayscale’s bitcoin ETF. 

According to its website, the agency is an investment organization that manages the Wisconsin Retirement System and the State Investment Funds alongside some smaller funds.

“SWIB has been successful in generating respectable returns and maintaining the trust of the beneficiaries and stakeholders of the funds we oversee,” the site said. 

SWIB declined to comment on the holdings in the disclosure. 

Investment managers are required to disclose their holdings in 13F forms if they manage $100 million or more. The filings show what firms bought and held through the last quarter. 

Read more: What 13F filings tell us about institutional appetite for bitcoin ETFs

Blockworks previously reported that BNY Mellon as well as BNP Paribas disclosed holdings, though both banks owned far less shares in comparison to Wisconsin’s disclosure on Tuesday. 

Paribas disclosed roughly 1,000 shares, and BNY Mellon had 20,000 shares of IBIT and 7,000 shares of Grayscale. 

Other investment managers have disclosed much larger holdings. Quattro Advisors, a Pittsburgh-based registered investment manager, disclosed 468,000 shares of IBIT, for example. 

On Monday, Wolverine Asset Management reported that it owned 874,000 shares of Fidelity’s bitcoin ETF. So far, that’s the largest Fidelity position that’s been disclosed. 

Investment managers have until mid-May to file their 13Fs. 

Updated May 14, 2024 at 3:05 pm ET: Noted that SWIB declined to comment, updated number of Grayscale shares.


Get the news in your inbox. Explore Blockworks newsletters:

Tags

Decoding crypto and the markets. Daily, with Byron Gilliam.

Upcoming Events

Javits Center North | 445 11th Ave

Tues - Thurs, March 24 - 26, 2026

Blockworks’ Digital Asset Summit (DAS) will feature conversations between the builders, allocators, and legislators who will shape the trajectory of the digital asset ecosystem in the US and abroad.

recent research

Research Report Templates (27).png

Research

Solana's spot trading landscape will remain bifurcated: prop AMMs will own the short-tail of highly liquid pairs, while passive AMMs continue drifting toward the long-tail. Both can win via vertical integration, but in opposite directions: passive AMMs are moving closer to users through token issuance platforms (e.g., Pump-PumpSwap, MetaDAO-Futarchy AMM), while prop AMMs are moving down the stack into transaction landing services and infrastructure (e.g., HumidiFi-Nozomi). The venues most at risk are legacy AMMs with limited end-user control and no durable, launch-driven source of order flow.

article-image

Some systems improve by failing — and crypto has no choice

article-image

Yield Basis introduces an IL-free AMM design that already dominates BTC DEX liquidity

article-image

Maybe tokenholders don’t need the rights that corporate shareholders have come to expect

article-image

As Hyperliquid and Lighter battle for perps DEX dominance, Boros could capture the structural upside

article-image

Investors are often right about the future, but wrong about the returns

article-image

A look back at 2025, reflections on our industry, and what it means for Blockworks in 2026