United-Guardian, Inc. (UG) ownership: Top institutional holder: RENAISSANCE TECHNOLOGIES LLC ($1.18M). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| RENAISSANCE TECHNOLOGIES LLC | 175766.00 | $1.18M | 2026-03-31 |
| GAMCO INVESTORS, INC. ET AL | 164388.00 | $1.10M | 2026-03-31 |
| VANGUARD GROUP INC | 150396.00 | $926440.00 | 2025-12-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 128340.00 | $850894.00 | 2026-03-31 |
| DIMENSIONAL FUND ADVISORS LP | 68538.00 | $454407.00 | 2026-03-31 |
| Rodgers Brothers Inc. | 63600.00 | $426120.00 | 2026-03-31 |
| Teton Advisors, LLC | 53761.00 | $360199.00 | 2026-03-31 |
| PARTHENON LLC | 50636.00 | $339261.00 | 2026-03-31 |
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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.