Supernus Pharmaceuticals, Inc.
SUPN- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001356576
No open-market purchases or sales by Supernus Pharmaceuticals, Inc. insiders were filed in the last 90 days; 334 institutions reported holding it in 13F filings for Q2 2026, worth $2.80B in total; no superinvestor holds it.
Holders of 5% or more of SUPN
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Supernus Pharmaceuticals, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 14.70%8.20M shares | – | Apr 22, 20251 filing | Apr 22, 2025 | SEC |
| Armistice Capital, LLC | 13G/A | 8.58%4.81M shares | – | Aug 15, 20251 filing | Aug 15, 2025 | SEC |
| Millennium Management LLC | 13G/A | 5.70%3.28M shares | +0.40 ppfrom 5.30% | Feb 2, 20262 filings | Feb 18, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
10 Schedule 13D and 13G filings on Supernus Pharmaceuticals, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Mar 27, 20261:19 PM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | –Below 5% | Mar 13, 2026 | SEC |
| Feb 18, 20264:38 PM ET | Millennium Management LLCand 3 others | 13G/A | 5.70%3.28M shares | +0.40 ppfrom 5.30% | Feb 11, 2026 | SEC |
| Feb 17, 20269:37 PM ET | Armistice Capital, LLCand 1 other | 13G/A | 4.82%2.76M shares | −0.24 ppfrom 5.06%Below 5% | Dec 31, 2025 | SEC |
| Feb 2, 20264:33 PM ET | Millennium Management LLCand 2 others | 13G | 5.30%3.04M shares | New | Jan 26, 2026 | SEC |
| Jan 21, 20261:21 PM ET | Dimensional Fund Advisors LP | 13G/A | 4.70%2.71M shares | –Below 5% | Dec 31, 2025 | SEC |
| Nov 14, 20256:27 PM ET | Armistice Capital, LLCand 1 other | 13G/A | 5.06%2.84M shares | −4.22 ppfrom 9.28% | Sep 30, 2025 | SEC |
| Aug 15, 202512:28 PM ET | Armistice Capital, LLCand 1 other | 13G/A | 8.58%4.81M shares | – | Jun 30, 2025 | SEC |
| May 15, 20253:18 PM ET | Armistice Capital, LLCand 1 other | 13G/A | 9.28%5.20M shares | +0.52 ppfrom 8.76% | Mar 31, 2025 | SEC |
| Apr 22, 20258:27 AM ET | BlackRock, Inc. | 13G/A | 14.70%8.20M shares | – | Mar 31, 2025 | SEC |
| Feb 14, 20255:20 PM ET | Armistice Capital, LLCand 1 other | 13G/A | 8.76%4.84M shares | – | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Supernus Pharmaceuticals, Inc. shares.
No Form 144 notices for Supernus Pharmaceuticals, Inc. are on file.