Jane Street Boosts Strategy Stake by 54% to 4.1 Million Shares

According to a Form 13F filed on Thursday, trading firm Jane Street Group expanded its position in Strategy by 53.8% during the third quarter. The report indicates the company held 4,119,097 Strategy shares as of September 30, up from the 2,677,622 shares reported at the end of June.

The class A position was valued at $630.6 million in the disclosure, calculated using the share price of $153.09 on September 30. However, Strategy has declined by approximately 25% since that date, leaving the common stake worth about $471 million based on Thursday's closing price of $114.41.

Understanding the Options and Market Maker Role

The reported figures come with important caveats regarding Jane Street Capital and its operations. As a major market maker in equities, exchange-traded funds, and options, the filing also details significant derivative holdings. The same document lists call options covering 13,573,000 Strategy shares and put options covering 13,991,800 shares. Each derivative volume is more than three times the size of the common stock stake, suggesting that some of the underlying equity may serve as a hedge for market-making activities rather than a directional investment.

The consolidated filing encompasses positions across seven other included managers, including Jane Street Global Trading and Jane Street Options. Authorized Signatory Jeremy Kahn signed the report in New York on November 12, which encompasses a total table listing of 14,764 entries valued at $1.19 trillion.

Jane Street raised its Strategy stake by 53.8% to over 4.1 million shares by September 30.

Broader Institutional Filings

Among early 13F submissions for the same period, Jane Street recorded the sharpest percentage increase for Strategy stakes. Other major institutional managers reported adjustments to their holdings as well. Capital International Investors raised its position by 4.5% to 36,467,109 shares, while Invesco added 10.9% to reach 10,362,698 shares. Conversely, Renaissance Technologies reduced its holdings by 41% down to 1,515,560 shares and exited its spot bitcoin exchange-traded fund positions.

Additional reports from JPMorgan Chase showed a 36% increase in its Strategy stake to 848,932 shares alongside 11.4 million IBIT shares. These disclosures reflect portfolio snapshots as of September 30, preceding subsequent market movements and an MSCI decision to remove Strategy from its USA index.

Why it matters

Quarterly 13F reports provide official transparency into the equity and derivative positions held by major institutional market participants as of a specific date. Because these disclosures reflect historical portfolios from the end of the previous quarter, they do not account for subsequent trades or market volatility.

The reported figures highlight the complex interplay between common stock ownership and hedging strategies employed by large financial institutions and market makers. Understanding these institutional positions offers insight into market liquidity and derivative positioning, though the data reflects past holdings rather than current investment outlooks.