Assertio Holdings, Inc. (ASRT) Institutional Ownership

Ownership Summary

Assertio Holdings, Inc. (NASDAQ:ASRT) is held by 53 institutional investors per 13F filings through December 2025.

• Collectively, these holders controlled 28.2% of Assertio Holdings's outstanding shares in December 2025, up from 23.7% in September 2025.
• They increased total shares held in Assertio Holdings by 0.0% from last quarter, and the number of investors in ASRT decreased 35.37% annually.
• Among the 53 funds, 53 bought more Assertio Holdings shares, 0 sold down, and 0 held their ground.
• In total, institutional investors held 2.0Mn shares in Assertio Holdings as of December 2025, up by 2.0Mn shares quarter on quarter, and up 104.08K shares year over year.
• As of December 31, 2025, the biggest holder of Assertio Holdings is Nantahala Capital Management, LLC at 692.34K shares, representing 9.75% of shares outstanding.
• The biggest buyers of Assertio Holdings for the quarter ending December 2025 included VANGUARD CAPITAL MANAGEMENT LLC (268.95K), Opaleye Management Inc. (265.71K), Nantahala Capital Management, LLC (105.0K), JANE STREET GROUP, LLC (67.6K), Walleye Capital LLC (65.93K).
• Top sellers of ASRT stock for the quarter ending December 2025 included MILLENNIUM MANAGEMENT LLC (18.05K), CM Management, LLC (15.0K), Empowered Funds, LLC (13.9K), Morgan Stanley (4.32K), Royal Bank Of Canada (157).
• Assertio Holdings's 10 largest shareholders as of December 2025 include Nantahala Capital Management, LLC (692.34K), VANGUARD CAPITAL MANAGEMENT LLC (268.95K), Opaleye Management Inc. (265.71K), RENAISSANCE TECHNOLOGIES LLC (228.6K), EDGEWOOD MANAGEMENT LLC (107.52K), BlackRock, Inc. (90.04K), JANE STREET GROUP, LLC (79.44K), GEODE CAPITAL MANAGEMENT, LLC (76.31K), Walleye Capital LLC (65.93K), Sei Investments Co (54.94K) per Business Quant data.