According to The Block’s analysis of SoSoValue data, U.S. spot bitcoin ETFs drew $2.4 billion in net inflows in the week ending September 25, 2026, their largest weekly gain since October 2025. The result returned the funds to positive territory for 2026, at about $934.1 million in the green. The last larger weekly intake came in the week ending October 10, 2025, when the funds recorded $2.7 billion of inflows; the latest total was concentrated heavily at the start of the five-trading-day period rather than spread evenly across the days.
Data Snapshot
| Metric | Current | Previous | Change | Period | As of | Source |
|---|---|---|---|---|---|---|
| U.S. spot bitcoin ETF net inflows | $2.4 billion | — | — | week ending September 25, 2026 | 2026-09-25 | The Block |
| Monday net inflows | $999.0 million | — | — | Monday, September 21, 2026 | 2026-09-21 | The Block |
| Tuesday net inflows | $714.7 million | — | — | Tuesday, September 22, 2026 | 2026-09-22 | The Block |
| Wednesday net inflows | $347.0 million | — | — | Wednesday, September 23, 2026 | 2026-09-23 | The Block |
| Thursday net inflows | $190.6 million | — | — | Thursday, September 24, 2026 | 2026-09-24 | The Block |
| Friday net inflows | $134.5 million | — | — | Friday, September 25, 2026 | 2026-09-25 | The Block |
September 21–25 inflows were front-loaded
Monday, September 21 accounted for $999.0 million of net inflows, the largest daily reading since October 6, 2025. That opening-day figure set the pace for the week and was followed by a smaller, though still substantial, $714.7 million on Tuesday, September 22.
Net inflows then eased to $347.0 million on Wednesday, September 23, before falling to $190.6 million on Thursday, September 24. Friday, September 25 brought a further $134.5 million, extending the funds’ positive run to seven straight days.
Each day from Monday through Friday remained positive, but the descending sequence shows how heavily the $2.4 billion weekly result relied on Monday’s exceptional intake. The daily figures are net flow readings—money entering and leaving the funds over a period—not the value of their holdings.
Bitcoin ETF inflows news graphic. — Source: The Block
The $2.4 billion week reversed ETFs’ 2026 flow position
The week ending September 25 was the strongest for U.S. spot bitcoin ETFs since October 2025. It was surpassed only by the $2.7 billion recorded in the week ending October 10, 2025, based on the comparison reported by The Block.
The $2.4 billion addition also left the products about $934.1 million positive for 2026. That year-to-date position reflects cumulative net flows during 2026, while the weekly figure captures activity only for the period ending September 25.
Cumulative net inflows reached $57.6 billion
Cumulative net inflows since launch stood at $57.6 billion as of Friday, September 25, 2026. Net assets across the funds totaled $108.4 billion on the same date.
The two measures are not interchangeable: cumulative net inflows track net investor subscriptions since launch, whereas net assets represent the value held by the funds at a given time. The reported asset total therefore provides a current balance-sheet snapshot alongside the longer-run flow figure.
Disclaimer: This article is provided for informational purposes only. It is not offered or intended to be used as legal, tax, investment, financial, or other advice.