Assertio Ownership | Who Owns Assertio?

Overview Forecast RevenueFinancials Chart Transcripts

Assertio Ownership Summary

Assertio is owned by 14.18% institutional investors, 2.52% insiders, and 83.29% retail investors. Nantahala capital management is the largest institutional shareholder, holding 10.78% of ASRT shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 3.15% of its assets in Assertio shares.

ASRT Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Assertio	14.18%	2.52%	83.29%
Sector	Healthcare Stocks	232.80%	10.63%	-143.43%
Industry	Specialty & Generic Drug Manufacturers Stocks	19.17%	12.41%	68.42%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Nantahala capital management	692.34K	10.78%	$13.20M
Renaissance	228.60K	3.56%	$4.36M
Edgewood management	107.52K	1.67%	$2.05M
Blackrock	1.39M	1.46%	$1.72M
Blackrock funding, inc. /de	90.03K	1.40%	$1.72M
Jane street group	79.44K	1.24%	$1.51M
Geode capital management	76.31K	1.19%	$1.46M
Walleye capital	65.93K	1.03%	$1.26M
Sei investments	54.94K	0.86%	$1.05M
Huntleigh advisors	52.60K	0.82%	$1.00M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Cm management	35.00K	0.56%	$667.10K
Nantahala capital management	692.34K	0.49%	$13.20M
Verdad advisers, lp	15.54K	0.33%	$296.21K
Huntleigh advisors	52.60K	0.17%	$1.00M
Perritt capital management	350.32K	0.15%	$308.56K
Tsp capital management group	25.06K	0.12%	$477.57K
Eam investors	45.15K	0.10%	$860.46K
Corsair capital management	25.55K	0.07%	$486.96K
Thurston, springer, miller, herd & titak	4.50K	0.04%	$85.75K
Edgewood management	107.52K	0.01%	$2.05M

Top Buyers

Holder	Shares	% Assets	Change
Nantahala capital management	692.34K	0.49%	105.00K
Jane street group	79.44K	0.00%	67.59K
Walleye capital	65.93K	0.01%	65.93K
Sei investments	54.94K	0.00%	54.94K
Huntleigh advisors	52.60K	0.17%	52.60K

Top Sellers

Holder	Shares	% Assets	Change
Blackrock	1.39M	-	-4.96M
Vanguard group	-	-	-4.43M
Cowen and company	-	-	-1.58M
Russell investments group	-	-	-424.06K
Gsa capital partners llp	-	-	-381.58K

New Positions

Holder	Shares	% Assets	Change	Value
Walleye capital	65.93K	0.01%	65.93K	$1.26M
Sei investments	54.94K	0.00%	54.94K	$1.05M
Huntleigh advisors	52.60K	0.17%	52.60K	$1.00M
Eam investors	45.15K	0.10%	45.15K	$860.46K
Marshall wace, llp	40.77K	0.00%	40.77K	$777.12K

Sold Out

Holder	Change
Ameritas advisory services	-1.00
National bank of canada /fi/	-1.00
Barclays	-4.00
Nelson, van denburg & campbell wealth management group	-14.00
Cbiz investment advisory services	-17.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	31	-56.94%	909,957	-96.39%	14	2.07%	5	-78.26%	26	44.44%
Sep 30, 2025	67	-10.67%	25,155,736	0.40%	26	3.85%	22	10.00%	18	-21.74%
Jun 30, 2025	73	1.39%	25,057,180	-1.35%	26	3.70%	19	35.71%	23	-25.81%
Mar 31, 2025	72	-18.18%	25,399,588	-9.04%	26	3.10%	16	-57.89%	29	26.09%
Dec 31, 2024	88	-2.22%	27,922,810	-6.03%	29	3.02%	38	26.67%	23	-20.69%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard US Total Market Shares ETF	3.01M	3.15%	-
Vanguard Total Stock Mkt Idx Inv	190.40K	2.95%	-
Vanguard Institutional Extnd Mkt Idx Tr	69.34K	1.08%	6.70K
IMC US Ultra Micro Cap	54.94K	0.85%	54.94K
Fidelity Extended Market Index	38.73K	0.60%	5.45K
Invesco FTSE RAFI US 1500 Small-Mid ETF	563.12K	0.59%	-
Russell Inv Tax-Managed US Mid&Sm Cap S	424.06K	0.44%	-
Pleiades Small Cap Equity A	27.47K	0.43%	27.47K
NT R2000 Value Index Fund - NL	283.43K	0.30%	22.32K
Invesco RAFI US 1500 Small-Mid ETF	264.90K	0.28%	-

Recent Insider Transactions

Date	Name	Role	Activity	Value
Nov 10, 2025	Stark David Matthew	-	Sell	$6.81K
Nov 18, 2024	Mason Heather L	-	Buy	$60.00K
Nov 14, 2024	O'Grady Brendan P.	CEO	Buy	$9.95K
Jun 11, 2024	Vacirca Jeff L	-	Buy	$11.10K
Jun 05, 2024	Mason Heather L	Interim Executive Officer	Buy	$24.25K

Insider Transactions Trends

Date	Buy	Sell
2026 Q2	-	-
2026 Q1	-	-
2025 Q4	-	1
2025 Q2	-	-
2025 Q1	-	-

ASRT Ownership FAQ

Who Owns Assertio?

Assertio shareholders are primarily institutional investors at 14.18%, followed by 2.52% insiders and 83.30% retail investors. The average institutional ownership in Assertio's industry, Specialty & Generic Drug Manufacturers Stocks, is 19.17%, which Assertio falls below.

Who owns the most shares of Assertio?

Assertio’s largest shareholders are Nantahala capital management (692.34K shares, 10.78%), Renaissance (228.6K shares, 3.56%), and Edgewood management (107.52K shares, 1.67%). Together, they hold 16.02% of Assertio’s total shares outstanding.

Does Blackrock own Assertio?

Yes, BlackRock owns 1.46% of Assertio, totaling 1.39M shares as of Jun 2024. This represents 0% of BlackRock's total assets, with a market value of 1.72M$. In the last quarter, BlackRock decreased its holdings by -4.965M shares, a -78.17% change.

Who is Assertio’s biggest shareholder by percentage of total assets invested?

Cm management is Assertio’s biggest shareholder by percentage of total assets invested, with 0.56% of its assets in 35K Assertio shares, valued at 667.1K$.

Who is the top mutual fund holder of Assertio shares?

Vanguard US Total Market Shares ETF is the top mutual fund holder of Assertio shares, with 3.15% of its total shares outstanding invested in 3.01M Assertio shares.

Try Tickergate Pro Free

Customize Everything. 100% Flexibility. Fast and Easy to Use (No code or Excel Needed)

Customize your own personal stocks lists, views and charts
Choose from hundreds of fields, up to 15 years of history
Conduct deep comparison analysis

Discover trending investment themes
Find your next best investment
Research stocks using tools