Who Owns ALPHA PRO TECH LTD (APT)? -- Institutional Holders (2026-06-30)
43 institutions reported holding $23.7M of ALPHA PRO TECH LTD (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