Caligan Partners LP
· New
Change
+6.1M
Date
Q1 2026
IR
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Caligan Partners LP
· New
Change
+6.1M
Date
Q1 2026
|
Caligan Partners LP | New· Q1 2026 | – | +6.1M | – | Q1 2026 | |||||
|
Adage Capital Partners Gp, L.L.C.
· Added
Change
+4.9M
Date
Q1 2026
|
Adage Capital Partners Gp, L.L.C. | Added· Q1 2026 | – | +4.9M | – | Q1 2026 | |||||
|
Nantahala Capital Management, LLC
· Reduced
Change
−3.1M
Date
Q1 2026
|
Nantahala Capital Management, LLC | Reduced· Q1 2026 | – | −3.1M | – | Q1 2026 | |||||
|
Perceptive Advisors LLC
· Reduced
Change
−2.5M
Date
Q1 2026
|
Perceptive Advisors LLC | Reduced· Q1 2026 | – | −2.5M | – | Q1 2026 | |||||
|
Boxer Capital Management, LLC
· New
Change
+2.2M
Date
Q1 2026
|
Boxer Capital Management, LLC | New· Q1 2026 | – | +2.2M | – | Q1 2026 | |||||
|
Marshall Wace, LLP
· Added
Change
+2.2M
Date
Q1 2026
|
Marshall Wace, LLP | Added· Q1 2026 | – | +2.2M | – | Q1 2026 | |||||
|
Adar1 Capital Management, LLC
· Added
Change
+1.8M
Date
Q1 2026
|
Adar1 Capital Management, LLC | Added· Q1 2026 | – | +1.8M | – | Q1 2026 | |||||
|
Woodline Partners LP
· New
Change
+1.4M
Date
Q1 2026
|
Woodline Partners LP | New· Q1 2026 | – | +1.4M | – | Q1 2026 | |||||
|
Boothbay Fund Management, LLC
· New
Change
+1.2M
Date
Q1 2026
|
Boothbay Fund Management, LLC | New· Q1 2026 | – | +1.2M | – | Q1 2026 | |||||
|
Mink Brook Asset Management LLC
· Reduced
Change
−1.1M
Date
Q1 2026
|
Mink Brook Asset Management LLC | Reduced· Q1 2026 | – | −1.1M | – | Q1 2026 | |||||
|
Farallon Capital Management LLC
· New
Change
+1.0M
Date
Q1 2026
|
Farallon Capital Management LLC | New· Q1 2026 | – | +1.0M | – | Q1 2026 | |||||
|
Millennium Management LLC
· Added
Change
+628K
Date
Q1 2026
|
Millennium Management LLC | Added· Q1 2026 | – | +628K | – | Q1 2026 | |||||
|
Susquehanna International Group, LLP
· Added
Change
+622K
Date
Q1 2026
|
Susquehanna International Group, LLP | Added· Q1 2026 | – | +622K | – | Q1 2026 | |||||
|
Trails Edge Capital Partners, LP
· New
Change
+500K
Date
Q1 2026
|
Trails Edge Capital Partners, LP | New· Q1 2026 | – | +500K | – | Q1 2026 | |||||
|
Voss Capital, LP
· Exited
Change
−442K
Δ Own
−100.0%
Date
Q1 2026
|
Voss Capital, LP | Exited· Q1 2026 | – | −442K | −100.0% | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Yerxa Benjamin R.
· Director
Sell
−$22K
|
Yerxa Benjamin R. | Director | Sell | $2.97 | −7K | −$22K | 704K | −1.0% | Jul 23, 2026 | Jul 27, 2026 | |||||||||
|
Schachle Joseph K.
· Officer
Sell
−$14K
|
Schachle Joseph K. | Officer | Sell | $2.94 | −5K | −$14K | 291K | −1.6% | Jul 23, 2026 | Jul 27, 2026 | |||||||||
|
Magrath George
· Director
Sell
−$28K
|
Magrath George | Director | Sell | $2.95 | −9K | −$28K | 1.7M | −0.5% | Jul 23, 2026 | Jul 27, 2026 | |||||||||
|
Gagnon Robert E.
· Officer
Sell
−$23K
|
Gagnon Robert E. | Officer | Sell | $2.95 | −8K | −$23K | 584K | −1.3% | Jul 23, 2026 | Jul 27, 2026 | |||||||||
|
Foundation Fighting Blindness Retinal Degeneration Fund
· Director
Sell
−$7.4M
|
Foundation Fighting Blindness Retinal Degeneration Fund | Director | Sell | $4.35 | −1.7M | −$7.4M | 3.8M | – | May 18, 2026 | May 20, 2026 | |||||||||
|
Yerxa Benjamin R.
· Director
Sell
−$39K
|
Yerxa Benjamin R. | Director | Sell | $5.24 | −7K | −$39K | 712K | – | Apr 23, 2026 | Apr 27, 2026 | |||||||||
|
Schachle Joseph K.
· Officer
Sell
−$25K
|
Schachle Joseph K. | Officer | Sell | $5.22 | −5K | −$25K | 296K | – | Apr 23, 2026 | Apr 27, 2026 | |||||||||
|
Zaremba Rabourn Amy
· Officer
Sell
−$9K
|
Zaremba Rabourn Amy | Officer | Sell | $5.20 | −2K | −$9K | 189K | – | Apr 23, 2026 | Apr 27, 2026 | |||||||||
|
Magrath George
· Director
Sell
−$50K
|
Magrath George | Director | Sell | $5.22 | −10K | −$50K | 1.7M | – | Apr 23, 2026 | Apr 27, 2026 | |||||||||
|
Jayagopal Ashwath
· Officer
Sell
−$39K
|
Jayagopal Ashwath | Officer | Sell | $5.19 | −8K | −$39K | 509K | – | Apr 23, 2026 | Apr 27, 2026 | |||||||||
|
Gagnon Robert E.
· CFO
Sell
−$41K
|
Gagnon Robert E. | CFO | Sell | $5.18 | −8K | −$41K | 592K | – | Apr 23, 2026 | Apr 27, 2026 | |||||||||
|
Rodgers Richard J.
· Director
Grant (A)
24K
|
Rodgers Richard J. | Director | Grant (A) | – | 24K | – | 343K | – | Apr 20, 2026 | Apr 22, 2026 | |||||||||
|
Manuso James S. J.
· Director
Grant (A)
24K
|
Manuso James S. J. | Director | Grant (A) | – | 24K | – | 317K | – | Apr 20, 2026 | Apr 22, 2026 | |||||||||
|
Graves Adrienne L.
· Director
Grant (A)
24K
|
Graves Adrienne L. | Director | Grant (A) | – | 24K | – | 128K | – | Apr 20, 2026 | Apr 22, 2026 | |||||||||
|
Gallagher Cam
· Director
Grant (A)
24K
|
Gallagher Cam | Director | Grant (A) | – | 24K | – | 2.0M | – | Apr 20, 2026 | Apr 22, 2026 | |||||||||
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63 reporting institutions disclosed IRD position changes in the Q1 2026 snapshot.
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.
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.
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.
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.
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.