Alpha Pro Tech, Ltd. (APT) ownership: Top institutional holder: NEEDHAM INVESTMENT MANAGEMENT LLC ($2.85M). Insider activity: Net Seller (0 buys, 20 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| NEEDHAM INVESTMENT MANAGEMENT LLC | 642500.00 | $2.85M | 2026-03-31 |
| VANGUARD GROUP INC | 609067.00 | $2.70M | 2025-12-31 |
| CITADEL ADVISORS LLC | 588200.00 | $2.61M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 553674.00 | $2.46M | 2026-03-31 |
| RENAISSANCE TECHNOLOGIES LLC | 544072.00 | $2.42M | 2026-03-31 |
| BlackRock, Inc. | 271800.00 | $1.21M | 2026-03-31 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 245800.00 | $1.09M | 2026-03-31 |
| DIMENSIONAL FUND ADVISORS LP | 137335.00 | $609767.00 | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-19 | |
| Sell | null | 2026-05-19 | |
| Sell | null | 2026-05-15 | |
| Sell | null | 2026-05-15 | |
| Sell | null | 2026-05-15 | |
| Sell | null | 2026-05-15 | |
| Sell | null | 2026-05-15 | |
| Sell | null | 2026-05-15 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.