ABOS short positioning

Twice-monthly snapshots of open short positions.

Settlement 2026-07-31

Short % of Float9.1%37,001,900 float shares

Days to Cover9.5355,781 average daily volume

Open Short Position3,367,011Acumen Pharmaceuticals, Inc. C

Change vs Previous+552,553+19.6%

Short interest history

Twice-monthly snapshots of open short positions.

Settlement	Short Position	Change	Change %	Days to Cover	Short % Float
Jul 31, 2026	3,367,011	+552,553	+19.6%	9.5	9.1%
Jul 15, 2026	2,814,458	+25,483	+0.9%	7.5	7.6%
Jun 30, 2026	2,788,975	+902,012	+47.8%	2.6	7.5%

Short interest is an open-position snapshot published twice monthly. It is not daily short-sale volume.

Daily off-exchange short volume

FINRA-reported short-sale transaction flow for the last 30 calendar days.

Trade Date	Short Volume	Short Exempt	FINRA Total	Short Volume %	Facilities
Aug 21, 2026	201,206	300	343,816	58.5%	3
Aug 20, 2026	89,148	902	212,672	41.9%	3
Aug 19, 2026	115,862	3,182	249,850	46.4%	3
Aug 18, 2026	46,848	694	109,361	42.8%	2
Aug 17, 2026	66,712	731	157,296	42.4%	3
Aug 14, 2026	120,138	1,600	187,753	64.0%	3
Aug 13, 2026	94,860	10	156,072	60.8%	2
Aug 12, 2026	68,499	801	133,342	51.4%	2
Aug 11, 2026	49,323	0	61,373	80.4%	2
Aug 10, 2026	51,268	0	87,290	58.7%	2
Aug 7, 2026	65,989	300	125,071	52.8%	3
Aug 6, 2026	62,202	0	88,278	70.5%	3
Aug 5, 2026	66,713	0	89,344	74.7%	2
Aug 4, 2026	42,907	7	95,279	45.0%	3
Aug 3, 2026	72,268	140	89,788	80.5%	2
Jul 31, 2026	64,091	15	83,205	77.0%	3
Jul 30, 2026	101,854	0	156,764	65.0%	3
Jul 29, 2026	104,515	16	186,202	56.1%	3
Jul 28, 2026	303,374	0	432,692	70.1%	3
Jul 27, 2026	80,810	0	108,112	74.7%	2
Jul 24, 2026	70,401	1,000	82,047	85.8%	2

Daily short volume is transaction flow reported through FINRA facilities. It does not measure open short positions and is not consolidated exchange-wide volume.