Comparable stake leader
Nantahala Capital Management, LLC
SEC ownership of Assertio Holdings, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001808665.
Disclosed value leader
Nantahala Capital Management, LLC
Comparable rows
0/50
Latest evidence
16 Jun 2026
- Public ticker
- ASRT on Nasdaq
- Parsed ownership sources
-
13F and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Nantahala Capital Management, LLC
Ranking: Comparable ownership first, then disclosed value
- Latest parsed ownership date
-
16 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001808665
- Issuer location
- Lake Forest, IL
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
1 signal
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Assertio Holdings, Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Nantahala Capital Managem...
Disclosed value leader
Nantahala Capital Managem...
Comparable rows
0/50
Latest evidence
16 Jun 2026
13F
3/4/5
Highest disclosed value: $13,195,905
50 rows are not safely comparable across share classes.
Showing 1-8 of 50 holder rows.
Quick read
Nantahala Capital Management, LLC has the largest disclosed position value at $13.2M.
0 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Nantahala Capital Management, LLC's linked filing trail.
Disclosed position value
Top 5
Nantahala Capital Management, LLC
$13.2M
VANGUARD CAPITAL MANAGEMENT LLC
$5.13M
Opaleye Management Inc.
$5.06M
RENAISSANCE TECHNOLOGIES LLC
$4.36M
EDGEWOOD MANAGEMENT LLC
$2.05M
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Nantahala Capital Management, LLC |
13F
Company
|
—
class O/S missing
|
$13,195,905
692,335 shares
|
— | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
—
class O/S missing
|
$5,126,225
268,952 shares
|
— | 31 Mar 2026 |
| Opaleye Management Inc. |
13F
Company
|
—
class O/S missing
|
$5,064,375
265,707 shares
|
— | 31 Mar 2026 |
| RENAISSANCE TECHNOLOGIES LLC |
13F
Company
|
—
class O/S missing
|
$4,357,097
228,599 shares
|
— | 31 Mar 2026 |
| EDGEWOOD MANAGEMENT LLC |
13F
Company
|
—
class O/S missing
|
$2,049,274
107,517 shares
|
— | 31 Mar 2026 |
| BlackRock, Inc. |
13F
Company
|
—
class O/S missing
|
$1,716,067
90,035 shares
|
— | 31 Mar 2026 |
| JANE STREET GROUP, LLC |
13F
Company
|
—
class O/S missing
|
$1,514,050
79,436 shares
|
— | 31 Mar 2026 |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
Company
|
—
class O/S missing
|
$1,455,028
76,314 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$6,806.
Buys
$0
Insiders: 0
Sells
$6,806
Insiders: 1
Net
-$6,806
Shares: -8,959
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 8,959
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 8,959 | $0 | $6,806 | -$6,806 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-15 of 15 reporting-owner rows connected to Assertio Holdings, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
15
Largest Forms 3/4/5 holder
Daniel A. Peisert
Net 12M change
-$6,806
Latest report
16 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Daniel A. Peisert | President & CEO, Director | $965,101 | Filing P/S | 11 Sep 2023 | ||
| Brendan P. O'Grady | CEO, Director | $485,665 | Mixed | 31 May 2025 | ||
| Peter D. Staple | Director | $356,987 | Mixed | 23 May 2024 | ||
| James L. Tyree | Director | $210,502 | Filing P/S | 14 Mar 2024 | ||
| Jeff L. Vacirca | Director | $167,786 | Filing P/S | 11 Jun 2024 | ||
| Sam Schlessinger | EVP, General Counsel | $13,892 | Mixed | 16 Jun 2026 | ||
| Paul Schwichtenberg | President and COO | $13,892 | Mixed | 16 Jun 2026 | ||
| Ajay Patel | EVP and CFO | $13,720 | Mixed | 16 Jun 2026 | ||
| Sravan K. Emany | Director | $0 | Mixed | 16 Jun 2026 | ||
| Mark L. Reisenauer | CEO, Director | $0 | Mixed | 16 Jun 2026 | ||
| William T. McKee | Director | $0 | Mixed | 16 Jun 2026 | ||
| Sigurd C. Kirk | Director | $0 | Mixed | 16 Jun 2026 | ||
| Heather L. Mason | Director | $0 | Mixed | 16 Jun 2026 | ||
| David M. Stark | Director | $0 | -$6,806 | -100% | Mixed | 16 Jun 2026 |
| Mary E. Pietryga | Svp, Cco | Mixed | 05 Feb 2025 |
Recent insider transactions for Assertio Holdings, Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| William T. McKee | ASRT | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -27,936 | 0 | 16 Jun 2026 | Direct | ||
| William T. McKee | ASRT | Stock Option (Right to Buy) | Disposed to Issuer | -100% | -5,415 | 0 | 16 Jun 2026 | Direct | ||
| Sam Schlessinger | ASRT | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -14,738 | 0 | 16 Jun 2026 | Direct | ||
| Sam Schlessinger | ASRT | Stock Option (Right to Buy) | Disposed to Issuer | -100% | -68,285 | 0 | 16 Jun 2026 | Direct | ||
| Sam Schlessinger | ASRT | Restricted Stock Units | Disposed to Issuer | -100% | -25,748 | 0 | 16 Jun 2026 | Direct | ||
| Sigurd C. Kirk | ASRT | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -12,017 | 0 | 16 Jun 2026 | Direct | ||
| Sigurd C. Kirk | ASRT | Stock Option (Right to Buy) | Disposed to Issuer | -100% | -13,328 | 0 | 16 Jun 2026 | Direct | ||
| Sravan K. Emany | ASRT | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -23,855 | 0 | 16 Jun 2026 | Direct | ||
| Sravan K. Emany | ASRT | Stock Option (Right to Buy) | Disposed to Issuer | -100% | -7,168 | 0 | 16 Jun 2026 | Direct | ||
| Paul Schwichtenberg | ASRT | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -13,987 | 0 | 16 Jun 2026 | Direct | ||
| Paul Schwichtenberg | ASRT | Stock Option (Right to Buy) | Disposed to Issuer | -100% | -78,811 | 0 | 16 Jun 2026 | Direct | ||
| Paul Schwichtenberg | ASRT | Restricted Stock Units | Disposed to Issuer | -100% | -32,042 | 0 | 16 Jun 2026 | Direct | ||
| Mark L. Reisenauer | ASRT | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -3,583 | 0 | 16 Jun 2026 | Direct | ||
| Mark L. Reisenauer | ASRT | Stock Option (Right to Buy) | Disposed to Issuer | -100% | -98,748 | 0 | 16 Jun 2026 | Direct | ||
| Mark L. Reisenauer | ASRT | Restricted Stock Units | Disposed to Issuer | -100% | -33,333 | 0 | 16 Jun 2026 | Direct | ||
| Heather L. Mason | ASRT | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -6,666 | 0 | 16 Jun 2026 | By Trust | ||
| Heather L. Mason | ASRT | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -20,944 | 0 | 16 Jun 2026 | Direct | ||
| Heather L. Mason | ASRT | Stock Option (Right to Buy) | Disposed to Issuer | -100% | -42,081 | 0 | 16 Jun 2026 | Direct | ||
| David M. Stark | ASRT | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -11,420 | 0 | 16 Jun 2026 | Direct | ||
| David M. Stark | ASRT | Stock Option (Right to Buy) | Disposed to Issuer | -100% | -5,415 | 0 | 16 Jun 2026 | Direct | ||
| Ajay Patel | ASRT | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -15,942 | 0 | 16 Jun 2026 | Direct | ||
| Ajay Patel | ASRT | Stock Option (Right to Buy) | Disposed to Issuer | -100% | -72,051 | 0 | 16 Jun 2026 | Direct | ||
| Ajay Patel | ASRT | Restricted Stock Units | Disposed to Issuer | -100% | -26,026 | 0 | 16 Jun 2026 | Direct | ||
| Heather L. Mason | ASRT | Common Stock | Gift | 6,666 | 6,666 | 13 May 2026 | By Trust | |||
| Heather L. Mason | ASRT | Common Stock | Gift | -24.1% | -6,666 | 20,944 | 13 May 2026 | Direct | ||
| David M. Stark | ASRT | Common Stock | Award | 73.8% | 4,851 | 11,420 | 05 May 2026 | Direct | ||
| Sravan K. Emany | ASRT | Common Stock | Award | 25.5% | 4,851 | 23,855 | 05 May 2026 | Direct | ||
| Sigurd C. Kirk | ASRT | Common Stock | Award | 67.7% | 4,851 | 12,017 | 05 May 2026 | Direct | ||
| William T. McKee | ASRT | Common Stock | Award | 21% | 4,851 | 27,936 | 05 May 2026 | Direct | ||
| Heather L. Mason | ASRT | Common Stock | Award | 21.3% | 4,851 | 27,610 | 05 May 2026 | Direct | ||
| Sam Schlessinger | ASRT | Stock Option (right to buy) | Award | 21,128 | 21,128 | 02 Mar 2026 | Direct | |||
| Sam Schlessinger | ASRT | Restricted Stock Units | Award | 18,804 | 18,804 | 02 Mar 2026 | Direct | |||
| Ajay Patel | ASRT | Stock Option (right to buy) | Award | 21,128 | 21,128 | 02 Mar 2026 | Direct | |||
| Ajay Patel | ASRT | Restricted Stock Units | Award | 18,804 | 18,804 | 02 Mar 2026 | Direct | |||
| Paul Schwichtenberg | ASRT | Stock Option (right to buy) | Award | 27,888 | 27,888 | 02 Mar 2026 | Direct | |||
| Paul Schwichtenberg | ASRT | Restricted Stock Units | Award | 24,820 | 24,820 | 02 Mar 2026 | Direct | |||
| Mark L. Reisenauer | ASRT | Stock Option (right to buy) | Award | 26,667 | 26,667 | 02 Mar 2026 | Direct | |||
| Sam Schlessinger | ASRT | Common Stock | Tax liability | -3.34% | -510 | 14,738 | 21 Feb 2026 | Direct | ||
| Sam Schlessinger | ASRT | Common Stock | Options Exercise | 8.1% | 1,143 | 15,248 | 21 Feb 2026 | Direct | ||
| Sam Schlessinger | ASRT | Restricted Stock Units | Options Exercise | -100% | -1,143 | 0 | 21 Feb 2026 | Direct | ||
| Ajay Patel | ASRT | Common Stock | Tax liability | -3.43% | -566 | 15,942 | 21 Feb 2026 | Direct | ||
| Ajay Patel | ASRT | Common Stock | Options Exercise | 7.44% | 1,143 | 16,508 | 21 Feb 2026 | Direct | ||
| Ajay Patel | ASRT | Restricted Stock Units | Options Exercise | -100% | -1,143 | 0 | 21 Feb 2026 | Direct | ||
| Paul Schwichtenberg | ASRT | Common Stock | Tax liability | -3.89% | -566 | 13,987 | 21 Feb 2026 | Direct | ||
| Paul Schwichtenberg | ASRT | Common Stock | Options Exercise | 8.52% | 1,143 | 14,553 | 21 Feb 2026 | Direct | ||
| Paul Schwichtenberg | ASRT | Restricted Stock Units | Options Exercise | -100% | -1,143 | 0 | 21 Feb 2026 | Direct | ||
| Sam Schlessinger | ASRT | Common Stock | Tax liability | -8.07% | -1,239 | 14,105 | 18 Feb 2026 | Direct | ||
| Sam Schlessinger | ASRT | Common Stock | Options Exercise | 22.1% | 2,778 | 15,344 | 18 Feb 2026 | Direct | ||
| Sam Schlessinger | ASRT | Restricted Stock Units | Options Exercise | -33.3% | -2,778 | 5,555 | 18 Feb 2026 | Direct | ||
| Paul Schwichtenberg | ASRT | Common Stock | Tax liability | -9.31% | -1,377 | 13,410 | 18 Feb 2026 | Direct |
* marks a reported price that did not pass the local price check.