ALPHA PRO TECH LTD - APT
Detailed investor-level table based on 13F positions.
Methodology:
Market value and % of portfolio use SEC reported VALUE ($000).
For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received.
Details.
Rows: 0
| Investor | History | Status | Shares held | Market value ($000) | % of portfolio | Previous % | Rank | Change in shares | % change in shares | Source | Date reported |
|---|---|---|---|---|---|---|---|---|---|---|---|
| NEEDHAM INVESTMENT MANAGEMENT LLC | History | No change | 642,500 | 3,610 | 0.11% | 0.15% | 1 | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | History | Added to | 625,799 | 3,516 | 0.0% | 0.0% | 2 | +205,673 | 48.96% | Q2 2026 | Aug 14, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | History | Added to | 561,572 | 3,156 | 0.0% | 0.0% | 3 | +17,500 | 3.22% | Q2 2026 | Aug 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | History | Reduced | 512,476 | 2,880 | 0.0% | 0.0% | 4 | -41,198 | -7.44% | Q2 2026 | Aug 13, 2026 |
| CITADEL ADVISORS LLC | History | Reduced | 511,800 | 2,876 | 0.0% | 0.0% | 5 | -273,500 | -34.83% | Q2 2026 | Sep 02, 2026 |
| BlackRock, Inc. | History | Added to | 278,687 | 1,566 | 0.0% | 0.0% | 6 | +6,887 | 2.53% | Q2 2026 | Aug 07, 2026 |
| DIMENSIONAL FUND ADVISORS LP | History | Reduced | 137,103 | 770 | 0.0% | 0.0% | 7 | -232 | -0.17% | Q2 2026 | Aug 11, 2026 |
| ACADIAN ASSET MANAGEMENT LLC | History | Reduced | 126,866 | 712 | 0.0% | 0.0% | 8 | -6,486 | -4.86% | Q2 2026 | Aug 13, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | History | Added to | 96,853 | 545 | 0.0% | 0.0% | 9 | +28,467 | 41.63% | Q2 2026 | Aug 12, 2026 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | History | Reduced | 64,525 | 362 | 0.01% | 0.01% | 10 | -14,000 | -17.83% | Q2 2026 | Aug 14, 2026 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | History | No change | 58,309 | 327 | 0.0% | 0.0% | 11 | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| MARSHALL WACE, LLP | History | New | 52,113 | 292 | 0.0% | — | 12 | +52,113 | New | Q2 2026 | Aug 13, 2026 |
| VANGUARD FIDUCIARY TRUST CO | History | Added to | 51,788 | 291 | 0.0% | 0.0% | 13 | +356 | 0.69% | Q2 2026 | Aug 13, 2026 |
| STATE STREET CORP | History | No change | 46,957 | 263 | 0.0% | 0.0% | 14 | 0 | 0.0% | Q2 2026 | Sep 22, 2026 |
| ESSEX INVESTMENT MANAGEMENT CO LLC | History | Reduced | 34,264 | 192 | 0.03% | 0.02% | 15 | -111 | -0.32% | Q2 2026 | Aug 06, 2026 |
| SIMPLEX TRADING, LLC | History | Added to | 28,672 | 161 | 0.0% | — | 16 | +28,572 | 28572.0% | Q2 2026 | Aug 12, 2026 |
| JANE STREET GROUP, LLC | History | Reduced | 27,147 | 152 | 0.0% | 0.0% | 17 | -12,983 | -32.35% | Q2 2026 | Aug 14, 2026 |
| NORTHERN TRUST CORP | History | Added to | 20,697 | 116 | 0.0% | 0.0% | 18 | +2,623 | 14.51% | Q2 2026 | Aug 13, 2026 |
| XTX Topco Ltd | History | Added to | 17,217 | 96 | 0.0% | 0.0% | 19 | +2,500 | 16.99% | Q2 2026 | Aug 14, 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | History | No change | 16,000 | 90 | 0.0% | 0.0% | 20 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| Pinnacle Financial Partners, Inc. | History | Reduced | 12,400 | 69 | 0.0% | 0.0% | 21 | -12,600 | -50.4% | Q2 2026 | Aug 14, 2026 |
| NewEdge Advisors, LLC | History | Reduced | 11,056 | 62 | 0.0% | 0.0% | 23 | -7,635 | -40.85% | Q2 2026 | Aug 12, 2026 |
| JAMES INVESTMENT RESEARCH, INC. | History | No change | 11,050 | 62 | 0.01% | 0.01% | 22 | 0 | 0.0% | Q2 2026 | Jul 24, 2026 |
| MORGAN STANLEY | History | Reduced | 8,066 | 45 | 0.0% | 0.0% | 24 | -700 | -7.99% | Q2 2026 | Aug 13, 2026 |
| GROUP ONE TRADING LLC | History | Reduced | 5,879 | 33 | 0.0% | 0.0% | 25 | -108,092 | -94.84% | Q2 2026 | Aug 13, 2026 |
| UBS Group AG | History | New | 5,761 | 32 | 0.0% | — | 26 | +5,761 | New | Q2 2026 | Aug 13, 2026 |
| Vanguard Global Advisers, LLC | History | No change | 3,961 | 22 | 0.0% | 0.0% | 27 | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| OSAIC HOLDINGS, INC. | History | Reduced | 3,780 | 21 | 0.0% | 0.0% | 28 | -1,000 | -20.92% | Q2 2026 | Aug 14, 2026 |
| Tower Research Capital LLC (TRC) | History | Added to | 684 | 3 | 0.0% | 0.0% | 29 | +42 | 6.54% | Q2 2026 | Aug 11, 2026 |
| FMR LLC | History | New | 400 | 2 | 0.0% | — | 32 | +400 | New | Q2 2026 | Aug 13, 2026 |
| BARCLAYS PLC | History | No change | 426 | 2 | 0.0% | 0.0% | 30 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| Farther Finance Advisors, LLC | History | No change | 363 | 2 | 0.0% | 0.0% | 31 | 0 | 0.0% | Q2 2026 | Jul 17, 2026 |
| SBI Securities Co., Ltd. | History | No change | 252 | 1 | 0.0% | 0.0% | 33 | 0 | 0.0% | Q2 2026 | Jul 22, 2026 |
| CALDWELL SUTTER CAPITAL, INC. | History | Closed out | 0 | 0 | — | 0.03% | — | -16,236 | -100.0% | Q2 2026 | Aug 05, 2026 |
| WELLS FARGO & COMPANY/MN | History | Reduced | 1 | 0 | — | 0.0% | — | -3,000 | -99.97% | Q2 2026 | Aug 14, 2026 |
| JONES FINANCIAL COMPANIES LLLP | History | Closed out | 0 | 0 | — | — | — | -150 | -100.0% | Q2 2026 | Aug 14, 2026 |
| JPMORGAN CHASE & CO | History | Added to | 131 | 0 | — | — | — | +91 | 227.5% | Q2 2026 | Aug 12, 2026 |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | History | New | 50 | 0 | — | — | — | +50 | New | Q2 2026 | Aug 12, 2026 |
| Caitong International Asset Management Co., Ltd | History | New | 22 | 0 | — | — | — | +22 | New | Q2 2026 | Aug 04, 2026 |
| SIGNATUREFD, LLC | History | New | 10 | 0 | — | — | — | +10 | New | Q2 2026 | Jul 23, 2026 |
| CVA Family Office, LLC | History | New | 3 | 0 | — | — | — | +3 | New | Q2 2026 | Aug 07, 2026 |
| CITIGROUP INC | History | Closed out | 0 | 0 | — | — | — | -1 | -100.0% | Q2 2026 | Aug 03, 2026 |
| BNP PARIBAS FINANCIAL MARKETS | History | No change | 13 | 0 | — | — | — | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| CWM, LLC | History | No change | 100 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | May 14, 2026 |
| Archer Investment Corp | History | No change | 39 | 0 | — | — | — | 0 | 0.0% | Q2 2026 | Aug 03, 2026 |
| TD Waterhouse Canada Inc. | History | No change | 40 | 0 | — | — | — | 0 | 0.0% | Q2 2026 | Jul 27, 2026 |