Mubadala Investment Company held its IBIT position flat at 14,721,917 shares, worth about $490.1 million at quarter's end, matching its share count from three months earlier. Harvard Management reported 3,044,612 shares unchanged, and Fortress Investment Group held its 1,325,000 shares steady as well.
The Abu Dhabi Investment Council's position also stayed close to flat, at 8,218,712 shares worth about $273.6 million.
Sticking with a position through a quarter where Bitcoin fell 14.2% behaves very differently from the swings tactical managers made elsewhere in the same filings, even if it falls short of proving permanent conviction.
What the tactical Bitcoin reducers cut
Brevan Howard's ordinary IBIT position fell 70.36% during the quarter, from 24,304,788 shares to 7,205,004. Read alone, that looks like one of the clearest bearish reads in the entire round.
The same filing complicates that read. Brevan Howard also reported IBIT call options tied to roughly 7.23 million underlying shares and put options tied to about 5.27 million, which supports a narrower claim than a simple bearish trade.
Brevan Howard cut most of its ordinary IBIT shares, as the 13F shows, though whether it exited Bitcoin altogether is a separate question the filing alone cannot answer.
Citadel's filing raises the same problem. Its ordinary IBIT position dropped 59.66% to 514,614 shares, dwarfed by the options book beside it: calls tied to about 24.65 million underlying shares and puts tied to roughly 17.86 million.
Characterizing that filing as a simple bearish Bitcoin trade would mean ignoring most of the position.
Macquarie's ordinary IBIT position fell a similar 61.78%, to 1,581,934 shares worth about $52.7 million. Macquarie also functions as an authorized participant able to create and redeem IBIT shares, the same plumbing role that complicates reading Jane Street's filing.
| Holder | Q2 ordinary IBIT shares | QoQ move | Bucket | Clean read |
|---|
| JPMorgan | 10,407,635 | +25.35% | Builder / bank | Reported ordinary-share position increased |
| Renaissance Technologies | 1,403,942 | +312.92% | Builder / quant | Large percentage increase |
| Mubadala | 14,721,917 | 0% | Sticky sovereign | Held through the drawdown |
| Harvard Management | 3,044,612 | 0% | Sticky endowment | No reported reduction |
| Fortress Investment Group | 1,325,000 | 0% | Sticky holder | Position stayed flat |
| Brevan Howard | 7,205,004 | -70.36% | Tactical reducer | Cut ordinary shares, but options complicate exposure |
| Citadel | 514,614 | -59.66% | Tactical / market plumbing | Ordinary shares fell, options book dominates |
| Macquarie | 1,581,934 | -61.78% | Tactical / AP-linked | Cut ordinary shares, but AP role matters |
Why Jane Street's billion-dollar position reads differently
Jane Street's reported IBIT position rebounded from 5,872,212 shares in the first quarter to 24,878,191 shares in the second, worth about $828.2 million at quarter's end. Taken at face value, that would be one of the largest directional Bitcoin bets in the entire filing season.
Jane Street is also listed among BlackRock's authorized participants for IBIT, the firms responsible for creating and redeeming ETF shares to keep the fund's price in line with the underlying Bitcoin it holds.
Quarter-end inventory for a firm in that role can reflect market-making and hedging as much as any directional view. Jane Street's own filing shows options tied to roughly 34 million and 34.8 million underlying shares on the call and put sides.
That combination reads far more like ETF plumbing than a bullish wager.
Every 13F treats an ETF share the same way, whether it sits with a sovereign wealth fund that has held it untouched for two straight quarters or a market maker cycling inventory daily.
Those are meaningfully different owners, and lumping them into one institutional total obscures the difference between demand that tends to persist through a drawdown and demand that tends to trade through one.
What determines whether the sticky base grows
The bull case has the second quarter's quiet holders staying quiet, or adding, through the third quarter, while banks and wealth platforms keep building alongside them and the number of institutional filers stabilizes.
If sovereign, endowment, and advisory-platform ownership keeps expanding while spot ETF inflows turn consistently positive, Bitcoin's institutional float starts looking genuinely less reflexive during the next downturn.
The bear case has the headline institutional number staying strong for reasons that have little to do with durable demand, driven mainly by trading firms, options books, and ETF plumbing that dominate every quarter-end snapshot.
| Signal to watch | Bull-case reading | Bear-case reading |
|---|
| Sticky-holder positions | Sovereigns, endowments, and long-term allocators hold or add again | They remain flat but do not expand |
| Bank and wealth-platform filings | More ordinary-share growth from banks, RIAs, and advisory platforms | Growth comes mostly from trading desks |
| Market-maker positions | Large inventories remain clearly tied to ETF liquidity provision | Headline ownership growth is dominated by ETF plumbing |
| Options exposure | Supports hedging around core positions | Dwarfs ordinary shares and clouds directional interpretation |
| Number of filers | Stabilizes or rises after Q2 decline | Keeps falling while concentration rises |
| Spot ETF flows | Consistent inflows confirm durable demand | Choppy flows suggest quarter-end positioning, not conviction |
Sticky holders remain present without expanding their positions, and the next real drawdown shows how much of the second quarter's institutional total was always closer to inventory than conviction.
Bitcoin's second-quarter filings show that the institutional ownership base is already splitting into holders built to stay and holders built to trade. Only one of those groups says much about what happens the next time Bitcoin falls 14% in a quarter.
