How much BTC do institutions hold?

TLDR

Institutions and custodians collectively hold about 5.9 million Bitcoin (BTC), roughly 30% of circulating supply, per recent Glassnode-based analyses this week (report).

1. U.S. spot Bitcoin ETFs hold ~1.31 million BTC; public companies ~1.07 million; governments ~620,000 (Glassnode summary).
2. Exchanges custody ~2.94 million BTC (mixed institutional and retail deposits) (summary above).
3. Example holders: MicroStrategy ~660,624 BTC; Harvard increased its Bitcoin ETF stake to $443 million in Q3 (company breakdown, Harvard stake).

Deep Dive

1. Concentration

Large entities now control roughly 5.9 million BTC, near 30% of circulating supply, indicating growing institutional ownership concentration. Recent summaries attribute this to ETFs, corporate treasuries, and government wallets consolidating holdings (analysis).

This concentration can dampen float and amplify the importance of institutional flows, especially during macro volatility. It also shifts market structure away from purely retail-driven cycles, a theme noted in multiple institutional flow updates this week (overview).

2. Breakdown By Holder Type

Current estimates: U.S. spot Bitcoin ETFs ~1.31 million BTC, public companies ~1.07 million BTC, governments ~620,000 BTC, and exchanges ~2.94 million BTC (custody that includes both institutional and retail deposits) (holder breakdown).

These figures change as ETFs rebalance and corporates add or trim. ETFs provide daily transparency, while corporate and government wallets update less frequently. The combined totals are best viewed as directional, not exact, but the trend toward higher institutional share is clear this week (context).

3. Named Examples

MicroStrategy remains the largest public BTC treasury at about 660,624 BTC, far ahead of other listed firms, per recent corporate snapshots (company list).

Endowments are participating via ETFs. Harvard increased its holding in BlackRocks iShares Bitcoin Trust to about $443 million in Q3 (roughly 0.75% of its endowment), highlighting mainstream allocators using regulated vehicles (Harvard update).

Private corporates also hold BTC. SpaceX was observed moving around treasury wallets and holds roughly 3,991 BTC, illustrating active corporate custody management (corporate activity).

Conclusion

Institutional ownership of BTC has grown meaningfully, with about 30% of supply concentrated across ETFs, corporate treasuries, governments, and custodians. The key implication is that ETF flows and major treasury moves increasingly shape liquidity and supply, making institutional behavior a primary driver of near-term market structure.