Assertio Ownership | Who Owns Assertio?

Overview Forecast RevenueFinancials Chart Transcripts

Assertio Ownership Summary

Assertio is owned by 26.11% institutional investors, 2.51% insiders, and 71.38% retail investors. Nantahala capital management is the largest institutional shareholder, holding 9.18% 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	26.11%	2.51%	71.38%
Sector	Healthcare Stocks	492.67%	11.09%	-403.76%
Industry	Specialty & Generic Drug Manufacturers Stocks	44.00%	11.78%	44.23%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Nantahala capital management	8.81M	9.18%	$5.65M
Vanguard group	4.43M	4.61%	$3.90M
Renaissance	2.99M	3.14%	$2.61M
Blackrock	1.39M	1.46%	$1.72M
Blackrock funding, inc. /de	1.36M	1.42%	$1.20M
Millennium management	1.10M	1.16%	$959.32K
Geode capital management	1.02M	1.07%	$900.75K
Two sigma investments, lp	910.05K	0.95%	$792.74K
Aqr capital management	902.57K	0.95%	$786.23K
Cm management	724.38K	0.75%	$638.04M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Cm management	724.38K	0.53%	$638.04M
Nantahala capital management	8.81M	0.22%	$5.65M
Perritt capital management	360.32K	0.12%	$231.03K
Tsp capital management group	316.88K	0.07%	$279.10K
Gsa capital partners llp	381.58K	0.03%	$336.00K
Bridgeway capital management	455.28K	0.01%	$396.60K
Williams & novak	10.00K	0.01%	$8.81K
Renaissance	2.99M	0.00%	$2.61M
Sonora investment management group	44.73K	0.00%	$39.40K
Virtu financial	24.47K	0.00%	$30.00K

Top Buyers

Holder	Shares	% Assets	Change
Ubs group	459.67K	0.00%	442.56K
Nantahala capital management	8.81M	0.22%	370.31K
Gsa capital partners llp	381.58K	0.03%	321.58K
Squarepoint ops	232.19K	0.00%	201.22K
Morgan stanley	592.33K	0.00%	107.92K

Top Sellers

Holder	Shares	% Assets	Change
Blackrock	1.39M	-	-4.96M
Cowen and company	-	-	-1.58M
Russell investments group	-	-	-424.06K
Aqr capital management	902.57K	0.00%	-357.66K
Bank of new york mellon	-	-	-289.30K

New Positions

Holder	Shares	% Assets	Change	Value
Hrt financial lp	11.19K	-	11.19K	$7.00K
Macquarie group	4.70K	-	4.70K	$5.83K
Bnp paribas arbitrage, snc	1.33K	-	1.33K	$1.16K
Royal bank of canada	1.27K	-	1.27K	$1.00K
Financial management professionals	1.07K	0.00%	1.07K	$942.00

Sold Out

Holder	Change
Ameritas advisory services	-1.00
Larson financial group	-9.00
Nelson, van denburg & campbell wealth management group	-14.00
Cbiz investment advisory services	-17.00
North star investment management	-100.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
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%
Sep 30, 2024	90	-15.09%	29,713,763	-17.46%	31	2.17%	31	-34.04%	29	-9.38%
Jun 30, 2024	106	-1.85%	35,997,143	-17.60%	37	1.79%	47	23.68%	32	-21.95%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard US Total Market Shares ETF	3.01M	3.15%	-
Vanguard Total Stock Mkt Idx Inv	2.86M	2.98%	-62.61K
Vanguard Institutional Extnd Mkt Idx Tr	898.26K	0.93%	-409.31K
Invesco FTSE RAFI US 1500 Small-Mid ETF	563.12K	0.59%	-
Fidelity Extended Market Index	512.33K	0.53%	-4.21K
Russell Inv Tax-Managed US Mid&Sm Cap S	424.06K	0.44%	-
NT R2000 Value Index Fund - NL	283.43K	0.30%	22.32K
Perritt MicroCap Opportunities Investor	266.25K	0.28%	-17.75K
Invesco RAFI US 1500 Small-Mid ETF	264.90K	0.28%	-
Vifag 2002 SICAV	253.57K	0.26%	-

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
2025 Q4	-	1
2025 Q2	-	-
2025 Q1	-	-
2024 Q4	2	-
2024 Q2	2	-

ASRT Ownership FAQ

Who Owns Assertio?

Assertio shareholders are primarily institutional investors at 26.11%, followed by 2.51% insiders and 71.38% retail investors. The average institutional ownership in Assertio's industry, Specialty & Generic Drug Manufacturers Stocks, is 44.00%, which Assertio falls below.

Who owns the most shares of Assertio?

Assertio’s largest shareholders are Nantahala capital management (8.81M shares, 9.18%), Vanguard group (4.43M shares, 4.61%), and Renaissance (2.99M shares, 3.14%). Together, they hold 16.93% 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 0.53% of its assets in 724.38K Assertio shares, valued at 638.04M$.

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