AVTR short positioning

Twice-monthly snapshots of open short positions.

Settlement 2026-07-31

Short % of Float8.1%657,874,000 float shares

Days to Cover3.415,756,310 average daily volume

Open Short Position53,171,919Avantor, Inc.

Change vs Previous-2,804,214-5.0%

Short interest history

Twice-monthly snapshots of open short positions.

Settlement	Short Position	Change	Change %	Days to Cover	Short % Float
Jul 31, 2026	53,171,919	-2,804,214	-5.0%	3.4	8.1%
Jul 15, 2026	55,976,133	+4,019,422	+7.7%	6.5	8.5%
Jun 30, 2026	51,956,711	+7,912,798	+18.0%	6.3	7.9%

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	1,283,444	47	2,280,397	56.3%	3
Aug 20, 2026	1,259,488	2	2,591,598	48.6%	3
Aug 19, 2026	1,154,247	3,474	2,083,998	55.4%	3
Aug 18, 2026	1,203,850	0	2,346,429	51.3%	3
Aug 17, 2026	763,884	53	1,726,594	44.2%	3
Aug 14, 2026	586,405	0	1,191,966	49.2%	3
Aug 13, 2026	1,019,214	60	1,850,070	55.1%	3
Aug 12, 2026	527,453	87	1,921,630	27.4%	3
Aug 11, 2026	1,281,874	0	2,936,431	43.7%	3
Aug 10, 2026	1,226,777	0	2,127,641	57.7%	3
Aug 7, 2026	1,163,992	128	2,235,061	52.1%	3
Aug 6, 2026	984,525	6	2,804,760	35.1%	3
Aug 5, 2026	1,176,309	1,164	3,075,784	38.2%	3
Aug 4, 2026	1,708,761	5,371	4,375,213	39.1%	3
Aug 3, 2026	1,771,861	630	3,156,446	56.1%	3
Jul 31, 2026	1,951,163	2,709	4,576,770	42.6%	3
Jul 30, 2026	3,981,132	163	6,916,881	57.6%	3
Jul 29, 2026	6,053,967	12,515	17,176,919	35.2%	3
Jul 28, 2026	4,956,517	4	7,587,839	65.3%	3
Jul 27, 2026	4,275,352	0	5,567,682	76.8%	3
Jul 24, 2026	3,374,025	1,213	4,922,101	68.5%	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.