CABA short positioning

Twice-monthly snapshots of open short positions.

Settlement 2026-07-31

Short % of Float27.4%148,591,000 float shares

Days to Cover18.52,210,652 average daily volume

Open Short Position40,777,017Cabaletta Bio, Inc. Common Sto

Change vs Previous-232,831-0.6%

Short interest history

Twice-monthly snapshots of open short positions.

Settlement	Short Position	Change	Change %	Days to Cover	Short % Float
Jul 31, 2026	40,777,017	-232,831	-0.6%	18.5	27.4%
Jul 15, 2026	41,009,848	+6,949,632	+20.4%	6.7	27.6%
Jun 30, 2026	34,060,216	+7,820,136	+29.8%	4.3	22.9%

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	751,640	9,835	1,889,921	39.8%	3
Aug 20, 2026	1,282,766	1,800	2,424,538	52.9%	3
Aug 19, 2026	2,244,916	12,998	5,244,840	42.8%	3
Aug 18, 2026	1,937,437	0	3,131,050	61.9%	3
Aug 17, 2026	1,548,954	10	3,359,366	46.1%	3
Aug 14, 2026	483,952	300	1,147,389	42.2%	2
Aug 13, 2026	657,983	3,800	1,349,131	48.8%	3
Aug 12, 2026	697,539	6,221	1,167,847	59.7%	3
Aug 11, 2026	1,158,824	8,600	2,106,786	55.0%	3
Aug 10, 2026	523,971	0	1,122,139	46.7%	3
Aug 7, 2026	521,320	0	906,766	57.5%	3
Aug 6, 2026	645,066	1	1,263,720	51.0%	3
Aug 5, 2026	1,885,753	0	2,909,011	64.8%	3
Aug 4, 2026	378,170	0	1,300,938	29.1%	2
Aug 3, 2026	195,129	1,674	604,961	32.3%	2
Jul 31, 2026	406,083	3,960	931,157	43.6%	2
Jul 30, 2026	284,380	16,344	605,616	47.0%	3
Jul 29, 2026	439,951	17,780	835,722	52.6%	3
Jul 28, 2026	322,746	10	645,700	50.0%	3
Jul 27, 2026	333,259	45	848,981	39.3%	3
Jul 24, 2026	395,363	0	699,104	56.6%	3

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