UNITED GUARDIAN INC (UG) Top Institutional Shareholders
UNITED GUARDIAN INC (UG) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $6.04M in UG holdings during the latest filing period.
Renaissance Technologies LLC is currently the largest disclosed institutional shareholder of UG tracked by InsiderSet, reporting ownership valued at approximately $1.18M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $1.23M, representing an estimated gain of +4.78% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 89% of the total disclosed UG value among the investors covered in this analysis. Major shareholders include Renaissance Technologies LLC, Gamco Investors, Inc. Et Al, Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in UNITED GUARDIAN INC (UG).
This page ranks the largest institutional UG shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
26
Total Reported Value
$6.04M
Largest Holder
Renaissance Technologies LLC
Largest Position
$1.18M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
28
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Renaissance Technologies LLC | Jim Simons | 0.00% | 175,766 | $1,177,632 | $1,233,877 | +$56,245 | +4.78% |
| Gamco Investors, Inc. Et Al | 0.01% | 164,388 | $1,101,400 | $1,154,004 | +$52,604 | +4.78% | |
| Vanguard Capital Management Llc | 0.00% | 128,340 | $850,894 | $900,947 | +$50,053 | +5.88% | |
| Dimensional Fund Advisors Lp | 0.00% | 68,538 | $454,407 | $481,137 | +$26,730 | +5.88% | |
| Rodgers Brothers Inc. | 0.05% | 63,600 | $426,120 | $446,472 | +$20,352 | +4.78% | |
| Teton Advisors, Llc | 0.25% | 53,761 | $360,199 | $377,402 | +$17,203 | +4.78% | |
| Parthenon Llc | 0.04% | 50,636 | $339,261 | $355,465 | +$16,204 | +4.78% | |
| Gabelli Funds Llc | 0.00% | 38,000 | $254,600 | $266,760 | +$12,160 | +4.78% | |
| Geode Capital Management, Llc | 0.00% | 36,607 | $242,763 | $256,981 | +$14,218 | +5.86% | |
| United Capital Financial Advisors, Llc | 0.00% | 20,070 | $134,469 | $140,891 | +$6,422 | +4.78% | |
| Vanguard Fiduciary Trust Co | 0.00% | 18,380 | $121,859 | $129,028 | +$7,169 | +5.88% | |
| First Manhattan Co. Llc. | 0.00% | 16,062 | $107,615 | $112,755 | +$5,140 | +4.78% | |
| Susquehanna International Group, Llp | 0.00% | 16,120 | $106,876 | $113,162 | +$6,286 | +5.88% | |
| Bridgeway Capital Management, Llc | 0.00% | 13,466 | $89,280 | $94,531 | +$5,251 | +5.88% | |
| Blackrock, Inc. | 0.00% | 11,664 | $78,149 | $81,881 | +$3,732 | +4.78% | |
| Hightower Advisors, Llc | 0.00% | 11,000 | $72,930 | $77,220 | +$4,290 | +5.88% | |
| Hikari Tsushin, Inc. | 0.00% | 9,500 | $63,650 | $66,690 | +$3,040 | +4.78% | |
| Caldwell Sutter Capital, Inc. | 0.01% | 3,324 | $22,271 | $23,334 | +$1,063 | +4.78% | |
| Vanguard Global Advisers, Llc | 0.00% | 1,547 | $10,257 | $10,860 | +$603 | +5.88% | |
| Tower Research Capital Llc (Trc) | 0.00% | 1,023 | $6,854 | $7,181 | +$327 | +4.78% | |
| Wells Fargo & Company/Mn | 0.00% | 1,000 | $6,702 | $7,020 | +$318 | +4.74% | |
| Ubs Group Ag | 0.00% | 489 | $3,276 | $3,433 | +$157 | +4.79% | |
| Osaic Holdings, Inc. | 0.00% | 300 | $2,010 | $2,106 | +$96 | +4.78% | |
| Sbi Securities Co., Ltd. | 0.00% | 134 | $898 | $941 | +$43 | +4.75% | |
| Jones Financial Companies Lllp | 0.00% | 100 | $656 | $702 | +$46 | +7.01% | |
| Morgan Stanley | 0.00% | 80 | $537 | $562 | +$25 | +4.58% |
Frequently asked questions about UG
Who owns the most UG stock?
The largest holders of UG are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for UNITED GUARDIAN INC (UG).
Is UG widely held by superinvestors?
Many widely followed stocks like UG appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly UG is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.