State of Wisconsin Investment Board, Madison, added shares of BlackRock’s iShares Bitcoin Trust ETF in the quarter ended June 30, but eliminated shares of another spot bitcoin exchange-traded product, the Grayscale Bitcoin Trust, a regulatory filing showed.
SWIB held about 2.9 million shares valued at $98.9 million of the iShares Bitcoin Trust ETF, according to SWIB’s 13F holdings report for the quarter ended June 30, filed Aug. 14 with the Securities and Exchange Commission. That was up from about 2.5 million shares valued at $99.2 million that SWIB held according to its 13F report for the quarter ended March 31.
The BlackRock spot bitcoin ETF, known by the ticker symbol IBIT, had net assets totaling $21.1 billion as of Aug. 13.
SWIB’s 13F for the quarter ended March 31 showed it holding slightly more than a million shares valued at $63.7 million of the Grayscale Bitcoin Trust, which is known by the ticker symbol GBTC. However, shares of GBTC did not appear among SWIB’s holdings in its 13F for the quarter ended June 30.
A SWIB spokeswoman declined to comment on the changes involving IBIT and GBTC. A spokeswoman for BlackRock also declined to comment. Grayscale Investments, sponsor of the $14.1 billion Grayscale Bitcoin Trust, did not immediately respond to a request for comment.
As of March 31, SWIB managed a total of $159.6 billion in assets, according to a report included with June board meeting materials. That included $136.4 billion in Wisconsin Retirement System assets.
