LUNG short positioning

Twice-monthly snapshots of open short positions.

Settlement 2026-07-31

Short % of Float2.8%37,700,000 float shares

Days to Cover1.5730,617 average daily volume

Open Short Position1,060,166Pulmonx Corporation Common Sto

Change vs Previous+3,920+0.4%

Short interest history

Twice-monthly snapshots of open short positions.

Settlement	Short Position	Change	Change %	Days to Cover	Short % Float
Jul 31, 2026	1,060,166	+3,920	+0.4%	1.5	2.8%
Jul 15, 2026	1,056,246	-92,646	-8.1%	4.6	2.8%
Jun 30, 2026	1,148,892	-1,114,613	-49.2%	1.3	3.0%

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	72,009	0	234,930	30.7%	2
Aug 20, 2026	50,729	0	109,125	46.5%	2
Aug 19, 2026	41,334	0	107,513	38.4%	3
Aug 18, 2026	50,610	3,159	102,369	49.4%	2
Aug 17, 2026	77,745	1,144	182,588	42.6%	3
Aug 14, 2026	133,452	0	288,965	46.2%	2
Aug 13, 2026	57,362	500	218,144	26.3%	2
Aug 12, 2026	38,883	0	138,811	28.0%	2
Aug 11, 2026	111,409	21	314,541	35.4%	3
Aug 10, 2026	257,209	6,775	590,457	43.6%	2
Aug 7, 2026	57,911	698	180,083	32.2%	2
Aug 6, 2026	111,157	3,742	324,317	34.3%	2
Aug 5, 2026	70,064	1,614	183,740	38.1%	2
Aug 4, 2026	95,514	3,748	349,237	27.3%	3
Aug 3, 2026	453,938	16,819	1,204,639	37.7%	3
Jul 31, 2026	190,776	9,882	574,928	33.2%	3
Jul 30, 2026	1,335,939	12,211	3,069,456	43.5%	3
Jul 29, 2026	40,386	30	92,833	43.5%	2
Jul 28, 2026	65,161	80	137,661	47.3%	3
Jul 27, 2026	37,272	0	108,449	34.4%	2
Jul 24, 2026	41,647	34	141,110	29.5%	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.