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Assertio Holdings, Inc. (ASRT) institutional ownership

Market cap$68M SectorHealthcare
Funds holding · Q1 2026
52
reported ASRT position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Activity unavailable N/A
38 buyers · 14 sellers

Assertio Holdings, Inc. (ASRT) price and institutional activity

Dates

Q1 2026

$0 bought by 38 investors
Nantahala Capital Management, LLCJane Street Group, LLC +36 more
$0 sold by 14 investors
Two Sigma Advisers, LPOpaleye Management Inc. +12 more
Bought Sold Totals per quarter; hover a bar for the names.

Assertio Holdings, Inc. (ASRT) institutional activity · 52

Investor Type Est. change Change Δ Own Date
Nantahala Capital Management, LLC · Added
Change +105K Date Q1 2026
Nantahala Capital Management, LLC Added· Q1 2026 +105K Q1 2026
Jane Street Group, LLC · Added
Change +68K Date Q1 2026
Jane Street Group, LLC Added· Q1 2026 +68K Q1 2026
Walleye Capital LLC · New
Change +66K Date Q1 2026
Walleye Capital LLC New· Q1 2026 +66K Q1 2026
Huntleigh Advisors, Inc. · New
Change +53K Date Q1 2026
Huntleigh Advisors, Inc. New· Q1 2026 +53K Q1 2026
Informed Momentum Co LLC · New
Change +45K Date Q1 2026
Informed Momentum Co LLC New· Q1 2026 +45K Q1 2026
Marshall Wace, LLP · New
Change +41K Date Q1 2026
Marshall Wace, LLP New· Q1 2026 +41K Q1 2026
Renaissance Technologies LLC Added· Q1 2026 +38K +19.9% Q1 2026
Corsair Capital Management, L.P. · New
Change +26K Date Q1 2026
Corsair Capital Management, L.P. New· Q1 2026 +26K Q1 2026
Bank of America Corp · Added
Change +25K Date Q1 2026
Bank of America Corp Added· Q1 2026 +25K Q1 2026
Two Sigma Advisers, LP · Exited
Change −21K Δ Own −100.0% Date Q1 2026
Two Sigma Advisers, LP Exited· Q1 2026 −21K −100.0% Q1 2026
Opaleye Management Inc. · Reduced
Change −19K Date Q1 2026
Opaleye Management Inc. Reduced· Q1 2026 −19K Q1 2026
Rothschild Wealth LLC · Exited
Change −19K Δ Own −100.0% Date Q1 2026
Rothschild Wealth LLC Exited· Q1 2026 −19K −100.0% Q1 2026
Quadrature Capital Ltd · New
Change +19K Date Q1 2026
Quadrature Capital Ltd New· Q1 2026 +19K Q1 2026
Millennium Management LLC · Reduced
Change −18K Date Q1 2026
Millennium Management LLC Reduced· Q1 2026 −18K Q1 2026
Squarepoint Ops LLC · New
Change +18K Date Q1 2026
Squarepoint Ops LLC New· Q1 2026 +18K Q1 2026
Data through Q1 2026 · filed May 26, 2026
15 of 52

Famous investor activity in Assertio Holdings, Inc. (ASRT)

Assertio Holdings, Inc. (ASRT) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
McKee William · Director Other Form 4 events -28K
Owned 0 Trade date Jun 16, 2026 Filed date Jun 16, 2026
McKee William Director Other Form 4 events -28K 0 Jun 16, 2026 Jun 16, 2026
McKee William · Director 2 operations -11K
Owned 0 Trade date Jun 16, 2026 Filed date Jun 16, 2026
McKee William Director 2 operations -11K 0 Jun 16, 2026 Jun 16, 2026
Schlessinger Sam · Officer Other Form 4 events -15K
Owned 0 Trade date Jun 16, 2026 Filed date Jun 16, 2026
Schlessinger Sam Officer Other Form 4 events -15K 0 Jun 16, 2026 Jun 16, 2026
Schlessinger Sam · Officer 5 operations -94K
Owned 0 Trade date Jun 16, 2026 Filed date Jun 16, 2026
Schlessinger Sam Officer 5 operations -94K 0 Jun 16, 2026 Jun 16, 2026
Kirk Sigurd · Director Other Form 4 events -12K
Owned 0 Trade date Jun 16, 2026 Filed date Jun 16, 2026
Kirk Sigurd Director Other Form 4 events -12K 0 Jun 16, 2026 Jun 16, 2026
Kirk Sigurd · Director 3 operations -19K
Owned 0 Trade date Jun 16, 2026 Filed date Jun 16, 2026
Kirk Sigurd Director 3 operations -19K 0 Jun 16, 2026 Jun 16, 2026
Emany Sravan Kumar · Director Other Form 4 events -24K
Owned 0 Trade date Jun 16, 2026 Filed date Jun 16, 2026
Emany Sravan Kumar Director Other Form 4 events -24K 0 Jun 16, 2026 Jun 16, 2026
Emany Sravan Kumar · Director 3 operations -13K
Owned 0 Trade date Jun 16, 2026 Filed date Jun 16, 2026
Emany Sravan Kumar Director 3 operations -13K 0 Jun 16, 2026 Jun 16, 2026
Schwichtenberg Paul · Officer Other Form 4 events -14K
Owned 0 Trade date Jun 16, 2026 Filed date Jun 16, 2026
Schwichtenberg Paul Officer Other Form 4 events -14K 0 Jun 16, 2026 Jun 16, 2026
Schwichtenberg Paul · Officer 5 operations -111K
Owned 0 Trade date Jun 16, 2026 Filed date Jun 16, 2026
Schwichtenberg Paul Officer 5 operations -111K 0 Jun 16, 2026 Jun 16, 2026
Reisenauer Mark L. · Director Other Form 4 events -4K
Owned 0 Trade date Jun 16, 2026 Filed date Jun 16, 2026
Reisenauer Mark L. Director Other Form 4 events -4K 0 Jun 16, 2026 Jun 16, 2026
Reisenauer Mark L. · Director 4 operations -132K
Owned 0 Trade date Jun 16, 2026 Filed date Jun 16, 2026
Reisenauer Mark L. Director 4 operations -132K 0 Jun 16, 2026 Jun 16, 2026
Mason Heather L. · Director 2 operations -28K
Owned 0 Trade date Jun 16, 2026 Filed date Jun 16, 2026
Mason Heather L. Director 2 operations -28K 0 Jun 16, 2026 Jun 16, 2026
Mason Heather L. · Director 2 operations -42K
Owned 0 Trade date Jun 16, 2026 Filed date Jun 16, 2026
Mason Heather L. Director 2 operations -42K 0 Jun 16, 2026 Jun 16, 2026
Stark David Matthew · Director Other Form 4 events -11K
Owned 0 Trade date Jun 16, 2026 Filed date Jun 16, 2026
Stark David Matthew Director Other Form 4 events -11K 0 Jun 16, 2026 Jun 16, 2026
15 of 18
15 of 18 Sign in to continue to older insider transactions.

Assertio Holdings, Inc. (ASRT) activist and large shareholders

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
Nantahala Capital Management, LLC 8.9M
% of shares outstanding 9.4% Filing date Nov 14, 2024
Nantahala Capital Management, LLC 8.9M 9.4% Nov 14, 2024
Vanguard Group Inc 4.5M
% of shares outstanding 4.7% Filing date Nov 12, 2024
Vanguard Group Inc 4.5M 4.7% Nov 12, 2024
Ci Investments Inc. 980K
% of shares outstanding 2.1% Filing date Feb 10, 2022
Ci Investments Inc. 980K 2.1% Feb 10, 2022
BlackRock Inc. 1.4M
% of shares outstanding 1.5% Filing date Jul 8, 2024
BlackRock Inc. 1.4M 1.5% Jul 8, 2024
Renaissance Technologies LLC 13K
% of shares outstanding 0.0% Filing date Feb 10, 2022
Renaissance Technologies LLC 13K 0.0% Feb 10, 2022
Nantahala Capital Management, LLC 0
% of shares outstanding 0.0% Filing date Jun 2, 2026
Nantahala Capital Management, LLC 0 0.0% Jun 2, 2026
Armistice Capital, LLC 0
% of shares outstanding 0.0% Filing date Nov 14, 2024
Armistice Capital, LLC 0 0.0% Nov 14, 2024
Continental General Insurance Co
% of shares outstanding 0.0% Filing date Feb 14, 2024
Continental General Insurance Co 0.0% Feb 14, 2024
8 of 9

Assertio Holdings, Inc. (ASRT) ownership FAQ

Who owns ASRT?

52 reporting institutions disclosed ASRT position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.