Alpha Pro Tech
Manufactures building weather barriers and disposable protective products for distributor-led construction, industrial and healthcare markets.
$5.35
After-hours close−0.02 (−0.37%)
At close$5.37(−1.83%)
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Breakdown13F · Form 4
Institutions 29.78%Insiders —
Shares outstanding 10.22M · Float 7.99M · 78.2% free float
Institutions13F, as of Mar 31, 2026
42 holders · 3.04M shares · 8 new positions · 14 increased · 7 reduced · 5 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| Needham Investment Management LLC | 642.5K | 6.29% | 0 | May 15, 2026 |
| Vanguard Capital Management LLC | 553.7K | 5.42% | +553.7Knew | May 15, 2026 |
| Renaissance Technologies LLC | 544.1K | 5.33% | +21.1K | May 14, 2026 |
| BlackRock, Inc. | 271.8K | 2.66% | +1.4K | May 13, 2026 |
| Susquehanna International Group, LLP | 141.2K | 1.38% | +72.9K | May 15, 2026 |
| Dimensional Fund Advisors LP | 137.3K | 1.34% | 0 | May 7, 2026 |
| Acadian Asset Management LLC | 133.4K | 1.31% | 0 | May 13, 2026 |
| Group One Trading, L.P. | 113.1K | 1.11% | +113.1K | May 13, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| Millar Donna | 11.70% | 1.28M | 13D | Feb 12, 2025 ↗ |
| Needham Investment Management L.L.C. | 6.20% | 642.5K | 13G | Feb 13, 2026 ↗ |
| Vanguard Capital Management | 5.97% | 609.1K | 13G | Apr 28, 2026 ↗ |
InsidersForm 4
Latest trades
Nothing filed in the last 12 months.
CongressHouse and Senate disclosures
Not reported.