United-Guardian, Inc. (UG) Ownership

NASDAQ: UGTop holders, insider trades and short interest.

UG ownership summary

as of October 18, 2026
Institutions
20.4%
of shares outstanding
Insiders
35.85%
of shares outstanding
Shares outstanding
4.6M
Float
3.0M
shares available to trade
Short interest
0.38%
12K shares short
Days to cover
1.48
short interest down 37.4% vs prior month
  • Institutions 20.36%
  • Insiders 35.85%
  • Other investors 43.78%

UG top institutional holders

20 largest
United-Guardian, Inc. top institutional holders
#Holder% of sharesSharesValueChangeReported
1Renaissance Technologies Corp3.63%167K$1.1M−9,000 (−5.1%)June 30, 2026
2Gamco Investors, Inc. Et Al3.58%164K$1.1M—June 30, 2026
3Vanguard Capital Management, LLC2.79%128K$877,846—June 30, 2026
4Dimensional Fund Advisors, Inc.1.59%73K$500,483+4,632 (+6.8%)June 30, 2026
5Rodgers Brothers Inc.1.30%60K$407,664−4,000 (−6.3%)June 30, 2026
6Teton Advisors, LLC1.17%54K$367,725—June 30, 2026
7Parthenon Capital Management LLC1.10%51K$346,350—June 30, 2026
8Gabelli Funds LLC0.83%38K$259,920—June 30, 2026
9Geode Capital Management, LLC0.77%35K$242,300−1,183 (−3.2%)June 30, 2026
10United Capital Financial Advisers Inc0.44%20K$137,279—June 30, 2026
11Vanguard Fiduciary Trust Co0.40%18K$125,719—June 30, 2026
12Susquehanna International Group, LLP0.36%17K$113,400+459 (+2.8%)June 30, 2026
13BlackRock Inc0.32%15K$100,644+3,050 (+26.1%)June 30, 2026
14First Manhattan Co. LLC0.28%13K$89,344−3,000 (−18.7%)June 30, 2026
15HighTower Advisors, LLC0.24%11K$75,240—June 30, 2026
16Hikari Tsushin, Inc.0.21%9,500$64,980—June 30, 2026
17CALDWELL SUTTER CAPITAL INC0.07%3,324$22,736—June 30, 2026
18UBS Group AG0.05%2,187$14,959+1,698 (+347.2%)June 30, 2026
19Vanguard Global Advisers, LLC0.03%1,547$10,581—June 30, 2026
20Wells Fargo & Co0.02%1,000$6,840—June 30, 2026

Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 4 holders added 9,839 shares and 4 cut 17K.

UG top mutual fund and ETF holders

20 largest
United-Guardian, Inc. top fund holders
#Holder% of sharesSharesValueChangeReported
11290 VT GAMCO Small Company Value IB3.41%157K$1.1M—August 31, 2026
2Vanguard MStar Total Stk Mkt Idx Invest1.96%90K$617,406—August 31, 2026
3TETON Westwood Mighty Mites AAA1.17%54K$367,725—June 30, 2026
4Gabelli Small Cap Growth AAA0.83%38K$259,920—June 30, 2026
5DFA US Micro Cap I0.70%32K$220,754—August 31, 2026
6Fidelity Extended Market Index0.37%17K$116,403−91 (−0.5%)August 31, 2026
7iShares Micro-Cap ETF0.23%11K$72,846−73 (−0.7%)September 30, 2026
8Dimensional US Small Cap ETF0.23%10K$70,944—September 30, 2026
9DFA US Small Cap I0.18%8,416$57,565—August 31, 2026
10EA Bridgeway Ultra-Small Company Mkt ETF0.16%7,466$51,067—September 30, 2026
11Fidelity Series Total Market Index0.11%5,228$35,760—August 31, 2026
12DFA US Core Equity 2 I0.10%4,655$31,840—August 31, 2026
13Fidelity Total Market Index0.10%4,379$29,952—August 31, 2026
14Schwab Total Stock Market Index0.07%3,342$22,859—August 31, 2026
15Fidelity Nasdaq Composite Index0.06%2,794$19,111—August 31, 2026
16Vanguard Balanced Index Inv0.04%2,067$14,138—August 31, 2026
17DFA US Core Equity 1 I0.04%1,622$11,094—August 31, 2026
18Vanguard U.S. Eq Idx £ Acc0.03%1,547$10,581—August 31, 2026
19Dimensional US Sustainability Core 1 ETF0.03%1,437$9,829—September 30, 2026
20Dimensional US Core Equity 1 ETF0.03%1,147$7,845—September 24, 2026

Funds report holdings monthly or quarterly; dates differ by fund.

UG insider transactions

latest 20
United-Guardian, Inc. insider transactions
DateNameTransactionPriceSharesValue
2016-08-15Joseph J VerniceSell$14.894,526$67,392
2015-09-22Betsee ParkerSell$18.267,600$138,776
2015-09-11Yun LiuBuy$1.0225,000$25,500
2015-09-04Nicolas Adrian BlitterswykBuy$1.002,500$2,500
2015-09-04Yun LiuBuy$1.008,500$8,500
2015-09-03S. Arthur AylesworthSell$1.022,500$2,550
2015-09-02Nicolas Adrian BlitterswykBuy$1.007,500$7,500
2015-08-26Betsee ParkerSell$18.0515,042$271,508
2015-08-25Betsee ParkerSell$18.3510,695$196,253
2015-07-23Betsee ParkerSell$19.082,927$55,847
2015-06-19Betsee ParkerSell$19.143,522$67,411
2015-06-09S. Arthur AylesworthSell$1.288,000$10,240
2015-06-08Betsee ParkerSell$21.803,448$75,166
2015-06-04S. Arthur AylesworthSell$1.1813,800$16,284
2015-05-26Betsee ParkerSell$22.269,630$214,364
2015-05-13Betsee ParkerSell$18.3117,778$325,515
2015-05-11Betsee ParkerSell$18.418,659$159,412
2015-04-23Betsee ParkerSell$18.362,927$53,740
2015-03-18Betsee ParkerSell$19.293,522$67,939
2015-03-06Betsee ParkerSell$18.683,448$64,409

Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.

UG shares outstanding

Shares outstanding

Year-end shares outstanding, adjusted for splits.

Who owns UG

Institutional investors own 20.4% of United-Guardian's shares and insiders 35.85%. The largest holder is Renaissance Technologies Corp with 3.63% of the shares (167K), as of June 30, 2026. Among the top 20 institutions, 4 added shares and 4 reduced their stake in the latest filings. Short interest is 0.38% of the float, or 1.48 days of average trading volume.

Related: UG key metrics, UG dividend history. See the UG stock overview for the latest quote and news.

UG ownership FAQ

Who owns the most United-Guardian stock?

The largest shareholders of United-Guardian are Renaissance Technologies Corp (3.63%), Gamco Investors, Inc. Et Al (3.58%), Vanguard Capital Management, LLC (2.79%), Dimensional Fund Advisors, Inc. (1.59%), Rodgers Brothers Inc. (1.30%).

What percentage of United-Guardian is owned by institutions?

Institutions hold 20.4% of United-Guardian's shares outstanding; insiders hold 35.85%.

Which funds own United-Guardian?

The largest fund holders of United-Guardian are 1290 VT GAMCO Small Company Value IB (3.41%), Vanguard MStar Total Stk Mkt Idx Invest (1.96%), TETON Westwood Mighty Mites AAA (1.17%), Gabelli Small Cap Growth AAA (0.83%), DFA US Micro Cap I (0.70%).

What is United-Guardian's short interest?

12K shares of United-Guardian were sold short, 0.38% of the float; at the average daily volume it would take 1.48 days to cover.

Are insiders buying or selling United-Guardian?

Of the latest 20 reported insider transactions in United-Guardian (since March 6, 2015), 4 were purchases and 16 were sales.

How many shares of United-Guardian are outstanding?

United-Guardian has 4.6M shares outstanding, of which 3.0M are in the public float.

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