Who Owns ALPHA PRO TECH (APT)? -- Institutional Holders (2026-06-30)

43 institutions reported holding $23.7M of ALPHA PRO TECH (APT) in SEC 13F filings for 2026-06-30. Largest institutional holders: NEEDHAM INVESTMENT MANAGEMENT LLC ($3.6M), SUSQUEHANNA INTERNATIONAL GROUP, LLP ($3.5M), VANGUARD GROUP INC ($3.2M), RENAISSANCE TECHNOLOGIES LLC ($3.2M), CITADEL ADVISORS LLC ($2.9M). Source: SEC Form 13F.

Rank	Institution	Value	Shares	Change
1	NEEDHAM INVESTMENT MANAGEMENT LLC	$3.6M	642,500	Hold
2	SUSQUEHANNA INTERNATIONAL GROUP, LLP	$3.5M	625,799	Added
3	VANGUARD GROUP INC	$3.2M	568,225	Trimmed
4	RENAISSANCE TECHNOLOGIES LLC	$3.2M	561,572	Added
5	CITADEL ADVISORS LLC	$2.9M	511,800	Trimmed
6	BlackRock, Inc.	$1.6M	278,687	Added
7	GROUP ONE TRADING LLC	$1.2M	216,079	Added
8	DIMENSIONAL FUND ADVISORS LP	$770,519	137,103	Trimmed
9	ACADIAN ASSET MANAGEMENT LLC	$712,000	126,866	Trimmed
10	GEODE CAPITAL MANAGEMENT, LLC	$545,002	96,853	Added
11	SIMPLEX TRADING, LLC	$367,952	65,472	Added
12	BRIDGEWAY CAPITAL MANAGEMENT, LLC	$362,631	64,525	Trimmed
13	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	$327,697	58,309	Hold
14	MARSHALL WACE, LLP	$292,873	52,113	New
15	STATE STREET CORP	$263,898	46,957	Hold
16	ESSEX INVESTMENT MANAGEMENT CO LLC	$192,564	34,264	Trimmed
17	JANE STREET GROUP, LLC	$152,566	27,147	Trimmed
18	NORTHERN TRUST CORP	$116,317	20,697	Added
19	XTX Topco Ltd	$96,760	17,217	Added
20	PRICE T ROWE ASSOCIATES INC /MD/	$90,000	16,000	Hold
21	Pinnacle Financial Partners, Inc.	$69,688	12,400	Trimmed
22	NewEdge Advisors, LLC	$62,135	11,056	Trimmed
23	JAMES INVESTMENT RESEARCH, INC.	$62,101	11,050	Hold
24	MORGAN STANLEY	$45,331	8,066	Trimmed
25	UBS Group AG	$32,376	5,761	New

Source: SEC Form 13F filings · as of 2026-06-30