Tudor Investment Corporation increased its position in the BlackRock iShares Bitcoin Trust (IBIT) by 18.9% during the second quarter, according to a regulatory holdings filing with the SEC. The adjustment extends Tudor’s existing exposure to spot Bitcoin ETFs, where IBIT provides Bitcoin price exposure through a regulated exchange-traded structure without direct custody of the asset.
Separately, Harvard Management Company reported holding its IBIT stake steady at quarter-end, following two consecutive quarters of reductions. The flat reading in its quarterly 13F-HR filing marks a pause in the endowment’s trimming trend. Harvard had previously expanded its Bitcoin ETF holdings significantly, with prior reporting noting a position that reached $442.8 million before the more recent cuts. The endowment also reportedly exited an Ethereum ETF position in an earlier period.
The filings are point-in-time snapshots and do not state the institutions’ rationale. Still, the disclosures add to a pattern of institutional engagement with spot Bitcoin ETF products. Other large allocators, including Mubadala, have also been reported building IBIT stakes. The latest updates reinforce Bitcoin as the direct asset in focus, though they do not confirm broader outlooks or new buying after the reporting cutoff.
