ALPHA PRO TECH LTD (APT) — Institutional Holders, Q2 2026
41 institutional investment managers reported a APT position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $17.1M. Every filer is listed below, ranked by position value. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
APT in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- SUSQUEHANNA INTERNATIONAL GROUP, LLPAdded · +101,473 sh+$570.3K
- MARSHALL WACE, LLPNew · +52,113 sh+$292.9K
- GEODE CAPITAL MANAGEMENTAdded · +28,467 sh+$160.0K
- RENAISSANCE TECHNOLOGIESAdded · +17,500 sh+$98.3K
- SIMPLEX TRADINGNew · +16,772 sh+$94.3K
Biggest sellers
- GROUP ONE TRADING, L.P.Trimmed · -110,992 sh-$623.8K
- VANGUARD CAPITAL MANAGEMENTTrimmed · -41,198 sh-$231.5K
- CALDWELL SUTTER CAPITALSold out · -16,236 sh-$91.2K
- BRIDGEWAY CAPITAL MANAGEMENTTrimmed · -14,000 sh-$78.7K
- Pinnacle Financial PartnersTrimmed · -12,600 sh-$70.8K
APT 13F holders ranked 1–41 of 41
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | NEEDHAM INVESTMENT MANAGEMENT#1 · 642,500 sh | 642,500 | $3.6M | 0.11% | 0.0% |
| 2 | RENAISSANCE TECHNOLOGIES#2 · 561,572 sh | 561,572 | $3.2M | <0.01% | +3.2% |
| 3 | VANGUARD CAPITAL MANAGEMENT#3 · 512,476 sh | 512,476 | $2.9M | <0.01% | -7.4% |
| 4 | BlackRock#4 · 278,687 sh | 278,687 | $1.6M | 0.00% | +2.5% |
| 5 | SUSQUEHANNA INTERNATIONAL GROUP, LLP#5 · 242,699 sh | 242,699 | $1.4M | <0.01% | +71.9% |
| 6 | DIMENSIONAL FUND ADVISORS#6 · 137,103 sh | 137,103 | $770.5K | <0.01% | -0.2% |
| 7 | ACADIAN ASSET MANAGEMENT#7 · 126,866 sh | 126,866 | $712.0K | <0.01% | -4.9% |
| 8 | GEODE CAPITAL MANAGEMENT#8 · 96,853 sh | 96,853 | $545.0K | 0.00% | +41.6% |
| 9 | BRIDGEWAY CAPITAL MANAGEMENT#9 · 64,525 sh | 64,525 | $362.6K | <0.01% | -17.8% |
| 10 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP#10 · 58,309 sh | 58,309 | $327.7K | <0.01% | 0.0% |
| 11 | MARSHALL WACE, LLP#11 · 52,113 sh | 52,113 | $292.9K | <0.01% | New |
| 12 | VANGUARD FIDUCIARY#12 · 51,788 sh | 51,788 | $291.0K | <0.01% | +0.7% |
| 13 | STATE STREET#13 · 46,957 sh | 46,957 | $263.9K | 0.00% | 0.0% |
| 14 | ESSEX INVESTMENT MANAGEMENT#14 · 34,264 sh | 34,264 | $192.6K | — | -0.3% |
| 15 | NORTHERN#15 · 20,697 sh | 20,697 | $116.3K | 0.00% | +14.5% |
| 16 | XTX Topco Ltd#16 · 17,217 sh | 17,217 | $96.8K | <0.01% | +17.0% |
| 17 | SIMPLEX TRADING#17 · 16,772 sh | 16,772 | $94.3K | <0.01% | New |
| 18 | PRICE T ROWE ASSOCIATES#18 · 16,000 sh | 16,000 | $90.0K | 0.00% | 0.0% |
| 19 | JANE STREET GROUP#19 · 13,047 sh | 13,047 | $73.3K | 0.00% | -49.1% |
| 20 | Pinnacle Financial Partners#20 · 12,400 sh | 12,400 | $69.7K | <0.01% | -50.4% |
| 21 | NewEdge Advisors#21 · 11,056 sh | 11,056 | $62.1K | <0.01% | New |
| 22 | JAMES INVESTMENT RESEARCH#22 · 11,050 sh | 11,050 | $62.1K | — | 0.0% |
| 23 | MORGAN STANLEY#23 · 8,066 sh | 8,066 | $45.3K | 0.00% | -8.0% |
| 24 | UBS Group AG#24 · 5,761 sh | 5,761 | $32.4K | 0.00% | New |
| 25 | Vanguard Global Advisers#25 · 3,961 sh | 3,961 | $22.3K | 0.00% | 0.0% |
| 26 | OSAIC#26 · 3,780 sh | 3,780 | $21.2K | 0.00% | -20.9% |
| 27 | GROUP ONE TRADING, L.P.#27 · 2,079 sh | 2,079 | $11.7K | 0.00% | -98.2% |
| 28 | Tower Research Capital (TRC)#28 · 684 sh | 684 | $3.8K | <0.01% | +6.5% |
| 29 | BARCLAYS PLC#29 · 426 sh | 426 | $2.4K | 0.00% | 0.0% |
| 30 | FMR#30 · 400 sh | 400 | $2.2K | 0.00% | New |
| 31 | Farther Finance Advisors#31 · 363 sh | 363 | $2.0K | — | 0.0% |
| 32 | SBI Securities , Ltd.#32 · 252 sh | 252 | $1.4K | — | 0.0% |
| 33 | JPMORGAN CHASE#33 · 131 sh | 131 | $727.00 | 0.00% | +227.5% |
| 34 | NORTHWESTERN MUTUAL WEALTH MANAGEMENT#34 · 50 sh | 50 | $281.00 | 0.00% | New |
| 35 | TD Waterhouse Canada#35 · 40 sh | 40 | $230.00 | — | 0.0% |
| 36 | Archer Investment#36 · 39 sh | 39 | $219.00 | 0.00% | 0.0% |
| 37 | Caitong International Asset Management , Ltd#37 · 22 sh | 22 | $124.00 | 0.00% | New |
| 38 | BNP PARIBAS FINANCIAL MARKETS#38 · 13 sh | 13 | $73.00 | 0.00% | 0.0% |
| 39 | SIGNATUREFD#39 · 10 sh | 10 | $56.00 | — | New |
| 40 | CVA Family Office#40 · 3 sh | 3 | $17.00 | 0.00% | New |
| 41 | WELLS FARGO & COMPANY#41 · 1 sh | 1 | $3.00 | 0.00% | -100.0% |
Funds that sold out of APT in Q2 2026 (3)
Held APT at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| CALDWELL SUTTER CAPITAL16,236 sh | 16,236 | $72.1K |
| JONES FINANCIAL COMPANIES LLLP150 sh | 150 | $660.00 |
| CITIGROUP1 sh | 1 | $4.00 |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.