Adage Capital Partners Gp, L.L.C.
· Exited
Change
−11.2M
Δ Own
−100.0%
Date
Q1 2026
HR
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Adage Capital Partners Gp, L.L.C.
· Exited
Change
−11.2M
Δ Own
−100.0%
Date
Q1 2026
|
Adage Capital Partners Gp, L.L.C. | Exited· Q1 2026 | – | −11.2M | −100.0% | Q1 2026 | |||||
|
Orbimed Advisors LLC
· New
Change
+9.8M
Date
Q1 2026
|
Orbimed Advisors LLC | New· Q1 2026 | – | +9.8M | – | Q1 2026 | |||||
|
Jane Street Group, LLC
· Exited
Change
−1.4M
Δ Own
−100.0%
Date
Q1 2026
|
Jane Street Group, LLC | Exited· Q1 2026 | – | −1.4M | −100.0% | Q1 2026 | |||||
|
Citadel Advisors LLC
· Reduced
Change
−1.3M
Δ Own
−63.8%
Date
Q1 2026
|
Citadel Advisors LLC | Reduced· Q1 2026 | – | −1.3M | −63.8% | Q1 2026 | |||||
|
Pale Fire Capital SE
· Added
Change
+1.2M
Date
Q1 2026
|
Pale Fire Capital SE | Added· Q1 2026 | – | +1.2M | – | Q1 2026 | |||||
|
Tejara Capital Ltd
· Added
Change
+1.2M
Date
Q1 2026
|
Tejara Capital Ltd | Added· Q1 2026 | – | +1.2M | – | Q1 2026 | |||||
|
Congress Park Capital LLC
· Added
Change
+965K
Date
Q1 2026
|
Congress Park Capital LLC | Added· Q1 2026 | – | +965K | – | Q1 2026 | |||||
|
Richmond Brothers, Inc.
· Added
Change
+865K
Date
Q1 2026
|
Richmond Brothers, Inc. | Added· Q1 2026 | – | +865K | – | Q1 2026 | |||||
|
Two Sigma Investments, LP
· Reduced
Change
−682K
Δ Own
−68.2%
Date
Q1 2026
|
Two Sigma Investments, LP | Reduced· Q1 2026 | – | −682K | −68.2% | Q1 2026 | |||||
|
Vanguard
· Added
Change
+534K
Date
Q1 2026
|
Vanguard | Added· Q1 2026 | – | +534K | – | Q1 2026 | |||||
|
Panagora Asset Management Inc
· Added
Change
+522K
Date
Q1 2026
|
Panagora Asset Management Inc | Added· Q1 2026 | – | +522K | – | Q1 2026 | |||||
|
Two Sigma Advisers, LP
· Exited
Change
−520K
Δ Own
−100.0%
Date
Q1 2026
|
Two Sigma Advisers, LP | Exited· Q1 2026 | – | −520K | −100.0% | Q1 2026 | |||||
|
Acadian Asset Management LLC
· New
Change
+513K
Date
Q1 2026
|
Acadian Asset Management LLC | New· Q1 2026 | – | +513K | – | Q1 2026 | |||||
|
Millennium Management LLC
· Added
Change
+461K
Date
Q1 2026
|
Millennium Management LLC | Added· Q1 2026 | – | +461K | – | Q1 2026 | |||||
|
Universal- Beteiligungs- Und Servicegesellschaft Mbh
· New
Change
+459K
Date
Q1 2026
|
Universal- Beteiligungs- Und Servicegesellschaft Mbh | New· Q1 2026 | – | +459K | – | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Collard Craig A.
· Director
2 operations
0
|
Collard Craig A. | Director | 2 operations | – | 0 | – | 83K | – | Jul 19, 2026 | Jul 20, 2026 | |||||||||
|
Forbes William P.
· Officer
2 operations
0
|
Forbes William P. | Officer | 2 operations | – | 0 | – | 23K | – | Jul 19, 2026 | Jul 20, 2026 | |||||||||
|
Forbes William P.
· Officer
Tax withholding or exercise payment (F)
-$517
|
Forbes William P. | Officer | Tax withholding or exercise payment (F) | $0.47 | -1K | -$517 | 224K | −0.5% | Jul 19, 2026 | Jul 20, 2026 | |||||||||
|
Duarte Ira
· Officer
2 operations
0
|
Duarte Ira | Officer | 2 operations | – | 0 | – | 23K | – | Jul 19, 2026 | Jul 20, 2026 | |||||||||
|
Duarte Ira
· Officer
Tax withholding or exercise payment (F)
-$517
|
Duarte Ira | Officer | Tax withholding or exercise payment (F) | $0.47 | -1K | -$517 | 264K | −0.4% | Jul 19, 2026 | Jul 20, 2026 | |||||||||
|
Duarte Ira
· CFO
2 operations
0
|
Duarte Ira | CFO | 2 operations | – | 0 | – | 12K | – | Jun 16, 2026 | Jun 17, 2026 | |||||||||
|
Duarte Ira
· CFO
Tax withholding or exercise payment (F)
-$1K
|
Duarte Ira | CFO | Tax withholding or exercise payment (F) | $0.38 | -4K | -$1K | 261K | – | Jun 16, 2026 | Jun 17, 2026 | |||||||||
|
Forbes William P.
· Officer
2 operations
0
|
Forbes William P. | Officer | 2 operations | – | 0 | – | 12K | – | Jun 6, 2026 | Jun 8, 2026 | |||||||||
|
Hensley Mark Earl
· Officer
2 operations
0
|
Hensley Mark Earl | Officer | 2 operations | – | 0 | – | 375K | – | May 6, 2026 | May 7, 2026 | |||||||||
|
Hensley Mark Earl
· Officer
2 operations
0
|
Hensley Mark Earl | Officer | 2 operations | – | 0 | – | 177K | – | Apr 30, 2026 | May 4, 2026 | |||||||||
|
Forbes William P.
· Officer
4 operations
0
|
Forbes William P. | Officer | 4 operations | – | 0 | – | 177K | – | Apr 30, 2026 | May 4, 2026 | |||||||||
|
Duarte Ira
· CFO
4 operations
0
|
Duarte Ira | CFO | 4 operations | – | 0 | – | 203K | – | Apr 30, 2026 | May 4, 2026 | |||||||||
|
Collard Craig A.
· Director
4 operations
0
|
Collard Craig A. | Director | 4 operations | – | 0 | – | 750K | – | Apr 30, 2026 | May 4, 2026 | |||||||||
|
Forbes William P.
· Officer
2 operations
0
|
Forbes William P. | Officer | 2 operations | – | 0 | – | 27K | – | Apr 19, 2026 | Apr 21, 2026 | |||||||||
|
Collard Craig A.
· Director
2 operations
0
|
Collard Craig A. | Director | 2 operations | – | 0 | – | 97K | – | Apr 19, 2026 | Apr 21, 2026 | |||||||||
N
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152 reporting institutions disclosed HRTX 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.