United Guardian Inc (UG) Institutional Ownership

Ownership Summary

United Guardian Inc (NASDAQ:UG) appears in 26 institutional 13F filings for the quarter ending December 2025.

• Collectively, these holders controlled 20.5% of United Guardian's outstanding shares in December 2025, down from 21.7% in September 2025.
• Their total shares held in UG decreased -3.0% from the prior quarter, while the number of investors in United Guardian decreased 23.53% year over year.
• Of these 26 holders, 6 added to their stakes in United Guardian, 10 trimmed positions, and 10 made no changes.
• In total, institutional investors held 939.95K shares in United Guardian as of December 2025, down by 29.08K shares quarter on quarter, and down 90.67K shares year over year.
• RENAISSANCE TECHNOLOGIES LLC is the top holder of United Guardian as of December 31, 2025, with 175.77K shares representing 3.83% of outstanding stock.
• The most significant purchases of UG for the quarter ending December 2025 came from VANGUARD CAPITAL MANAGEMENT LLC (128.34K), VANGUARD FIDUCIARY TRUST CO (18.38K), GAMCO INVESTORS, INC. ET AL (1.89K), Vanguard Global Advisers, LLC (1.55K), SUSQUEHANNA INTERNATIONAL GROUP, LLP (1.54K).
• Top sellers of UG stock for the quarter ending December 2025 included RENAISSANCE TECHNOLOGIES LLC (10.88K), Rodgers Brothers Inc. (10.25K), DIMENSIONAL FUND ADVISORS LP (6.41K), FIRST MANHATTAN CO. LLC. (1.0K), Wells Fargo & Company/Mn (1).
• Business Quant data shows the 10 biggest positions in United Guardian as of December 2025 are held by RENAISSANCE TECHNOLOGIES LLC (175.77K), GAMCO INVESTORS, INC. ET AL (164.39K), VANGUARD CAPITAL MANAGEMENT LLC (128.34K), DIMENSIONAL FUND ADVISORS LP (68.54K), Rodgers Brothers Inc. (63.6K), Teton Advisors, LLC (53.76K), PARTHENON LLC (50.64K), GABELLI FUNDS LLC (38.0K), GEODE CAPITAL MANAGEMENT, LLC (36.61K), UNITED CAPITAL FINANCIAL ADVISORS, LLC (20.07K).