Bitcoin ETF Flows September 2025

Spot bitcoin ETFs saw net inflows of $3.51B over 21 trading days in September 2025. The largest single-day inflow was +$741.5M on Wednesday, September 10, 2025, and the largest outflow was −$418.3M on Friday, September 26, 2025. 14 of the 21 days closed with net inflows and 7 with net outflows. By fund, IBIT led with net inflows of $2.66B, followed by FBTC ($525.0M); GBTC had the largest net outflows at $200.2M. August 2025 saw net outflows of $749.2M over 21 trading days, a month-over-month change of +$4.26B.

Net flow

+$3.51B

21 trading days

Inflow / outflow days

14 / 7

2025-09-02 to 2025-09-30

Biggest inflow day

+$741.5M

2025-09-10

Biggest outflow day

−$418.3M

2025-09-26

vs August 2025

+$4.26B

month-over-month change

Bitcoin ETF daily net flows, September 2025

One row per settled US trade date, in USD millions. Each fund column is that fund's net creation (positive) or redemption (negative); the last column is the net total across every US spot bitcoin ETF. Link to a day with #YYYY-MM-DD, e.g. #2025-09-30.

Trade date	IBIT	FBTC	BITB	ARKB	BTCO	EZBC	HODL	GBTC	BTC	Net total
Tue Sep 2	72.9	132.7	39.1	71.9	2.2	0.0	4.7	0.0	9.3	332.8
Wed Sep 3	289.8	9.8	0.0	−27.9	0.0	0.0	0.0	0.0	28.8	300.5
Thu Sep 4	134.8	−117.4	−66.4	−125.5	0.0	−3.2	−17.9	−22.4	−4.9	−222.9
Fri Sep 5	−63.2	0.0	−49.6	0.0	0.0	0.0	0.0	−47.3	0.0	−160.1
Mon Sep 8	25.5	156.5	42.7	89.5	6.7	6.5	20.6	4.4	11.9	364.3
Tue Sep 9	169.3	−55.8	−18.2	−72.3	0.0	0.0	0.0	0.0	0.0	23.0
Wed Sep 10	211.2	299.0	44.4	145.1	0.0	3.3	12.0	8.9	17.6	741.5
Thu Sep 11	366.2	134.7	40.4	0.0	5.7	3.3	2.4	0.0	0.0	552.7
Fri Sep 12	264.7	315.2	29.2	19.4	0.0	0.0	8.2	0.0	5.7	642.4
Mon Sep 15	261.8	7.5	−18.8	0.0	0.0	3.3	0.0	0.0	6.1	259.9
Tue Sep 16	209.2	45.8	−10.8	40.7	0.0	0.0	7.4	0.0	0.0	292.3
Wed Sep 17	149.7	−116.0	−12.6	−32.3	0.0	0.0	0.0	−62.6	22.5	−51.3
Thu Sep 18	0.0	97.4	12.8	25.0	3.5	6.8	6.6	0.0	10.9	163.0
Fri Sep 19	246.1	0.0	0.0	0.0	0.0	0.0	0.0	−23.5	0.0	222.6
Mon Sep 22	0.0	−276.7	0.0	−52.3	0.0	0.0	−9.5	−24.6	0.0	−363.1
Tue Sep 23	2.5	−75.6	−12.8	−27.9	10.0	0.0	0.0	0.0	0.0	−103.8
Wed Sep 24	128.9	29.7	24.7	37.7	0.0	0.0	6.4	0.0	13.6	241.0
Thu Sep 25	79.7	−114.8	−80.5	−63.0	0.0	−6.3	−10.1	−42.9	−15.5	−253.4
Fri Sep 26	−37.3	−300.4	−23.8	−17.8	0.0	0.0	−9.3	−17.1	−12.6	−418.3
Mon Sep 29	−46.6	298.7	47.2	62.2	35.3	16.5	30.7	26.9	47.1	518.0
Tue Sep 30	199.4	54.7	70.1	105.7	0.0	0.0	0.0	0.0	0.0	429.9
Month total	2,664.6	525.0	57.1	178.2	63.4	30.2	52.2	−200.2	140.5	3,511.0

Settled figures only: a day appears once every fund has reported. Sources: Farside Investors (primary, with the per-fund breakdown) and SoSoValue (backup, net total only).

Net flow by fund, September 2025

Each fund's net flow summed over the 21 trading days with a per-fund breakdown, largest inflow first.

IBIT +$2.66B

FBTC +$525.0M

ARKB +$178.2M

BTC +$140.5M

BTCO +$63.4M

BITB +$57.1M

HODL +$52.2M

EZBC +$30.2M

BRRR $0

BTCW $0

GBTC −$200.2M

More Bitcoin ETF flow months

Get this via the API

settled daily net flows by trade date Free

GET /api/v1/market-intelligence/etf/btc/flows returns the newest days settled trade dates (up to 1000), oldest first: each row has trade_date, flow_usd (the net total across every fund) and its source. days=294 reaches back to 2025-09-02; keep the rows whose trade_date starts with 2025-09.

GET · etf/btc/flowscurl

curl -H "X-API-Key: cdk_live_yourkey" \
  "https://cryptodataapi.com/api/v1/market-intelligence/etf/btc/flows?days=294"

The day still being reported comes back separately as in_progress and is never in flows. Swap btc for eth or sol.

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