28 institutions reported holding $6.0M of UNITED GUARDIAN INC (UG) in SEC 13F filings for 2026-03-31. Largest institutional holders: RENAISSANCE TECHNOLOGIES LLC ($1.2M), GAMCO INVESTORS, INC. ET AL ($1.1M), VANGUARD CAPITAL MANAGEMENT LLC ($850,894), DIMENSIONAL FUND ADVISORS LP ($454,407), Rodgers Brothers Inc. ($426,120). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | RENAISSANCE TECHNOLOGIES LLC | $1.2M | 175,766 | Trimmed |
| 2 | GAMCO INVESTORS, INC. ET AL | $1.1M | 164,388 | Added |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | $850,894 | 128,340 | New |
| 4 | DIMENSIONAL FUND ADVISORS LP | $454,407 | 68,538 | Trimmed |
| 5 | Rodgers Brothers Inc. | $426,120 | 63,600 | Trimmed |
| 6 | Teton Advisors, LLC | $360,199 | 53,761 | Hold |
| 7 | PARTHENON LLC | $339,261 | 50,636 | Hold |
| 8 | GABELLI FUNDS LLC | $254,600 | 38,000 | Hold |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | $242,763 | 36,607 | Added |
| 10 | UNITED CAPITAL FINANCIAL ADVISORS, LLC | $134,469 | 20,070 | Hold |
| 11 | VANGUARD FIDUCIARY TRUST CO | $121,859 | 18,380 | New |
| 12 | FIRST MANHATTAN CO. LLC. | $107,615 | 16,062 | Trimmed |
| 13 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $106,876 | 16,120 | Added |
| 14 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $89,280 | 13,466 | Hold |
| 15 | BlackRock, Inc. | $78,149 | 11,664 | Added |
| 16 | HighTower Advisors, LLC | $72,930 | 11,000 | Hold |
| 17 | Hikari Tsushin, Inc. | $63,650 | 9,500 | Hold |
| 18 | CALDWELL SUTTER CAPITAL, INC. | $22,271 | 3,324 | Hold |
| 19 | Vanguard Global Advisers, LLC | $10,257 | 1,547 | New |
| 20 | Tower Research Capital LLC (TRC) | $6,854 | 1,023 | Added |
| 21 | WELLS FARGO & COMPANY/MN | $6,702 | 1,000 | Trimmed |
| 22 | UBS Group AG | $3,276 | 489 | Added |
| 23 | OSAIC HOLDINGS, INC. | $2,010 | 300 | Hold |
| 24 | SBI Securities Co., Ltd. | $898 | 134 | Hold |
| 25 | JONES FINANCIAL COMPANIES LLLP | $656 | 100 | Hold |
Source: SEC Form 13F filings · as of 2026-03-31