Lynx1 Capital Management LP
· Added
Change
+2.5M
Date
Q1 2026
AG
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Lynx1 Capital Management LP
· Added
Change
+2.5M
Date
Q1 2026
|
Lynx1 Capital Management LP | Added· Q1 2026 | – | +2.5M | – | Q1 2026 | |||||
|
T. Rowe Price Investment Management, Inc.
· Added
Change
+1.5M
Date
Q1 2026
|
T. Rowe Price Investment Management, Inc. | Added· Q1 2026 | – | +1.5M | – | Q1 2026 | |||||
|
Tcg Crossover Management, LLC
· Exited
Change
−1.2M
Δ Own
−100.0%
Date
Q1 2026
|
Tcg Crossover Management, LLC | Exited· Q1 2026 | – | −1.2M | −100.0% | Q1 2026 | |||||
|
D. E. Shaw & Co., Inc.
· Added
Change
+844K
Δ Own
+45.9%
Date
Q1 2026
|
D. E. Shaw & Co., Inc. | Added· Q1 2026 | – | +844K | +45.9% | Q1 2026 | |||||
|
Citadel Advisors LLC
· Reduced
Change
−729K
Δ Own
−54.1%
Date
Q1 2026
|
Citadel Advisors LLC | Reduced· Q1 2026 | – | −729K | −54.1% | Q1 2026 | |||||
|
Capital International Investors
· Reduced
Change
−655K
Date
Q1 2026
|
Capital International Investors | Reduced· Q1 2026 | – | −655K | – | Q1 2026 | |||||
|
Balyasny Asset Management L.P.
· Reduced
Change
−617K
Date
Q1 2026
|
Balyasny Asset Management L.P. | Reduced· Q1 2026 | – | −617K | – | Q1 2026 | |||||
|
Farallon Capital Management LLC
· Added
Change
+524K
Δ Own
+10.2%
Date
Q1 2026
|
Farallon Capital Management LLC | Added· Q1 2026 | – | +524K | +10.2% | Q1 2026 | |||||
|
BlackRock
· Added
Change
+520K
Date
Q1 2026
|
BlackRock | Added· Q1 2026 | – | +520K | – | Q1 2026 | |||||
|
Jane Street Group, LLC
· Reduced
Change
−436K
Date
Q1 2026
|
Jane Street Group, LLC | Reduced· Q1 2026 | – | −436K | – | Q1 2026 | |||||
|
Nuveen, LLC
· Added
Change
+424K
Date
Q1 2026
|
Nuveen, LLC | Added· Q1 2026 | – | +424K | – | Q1 2026 | |||||
|
Millennium Management LLC
· Reduced
Change
−366K
Date
Q1 2026
|
Millennium Management LLC | Reduced· Q1 2026 | – | −366K | – | Q1 2026 | |||||
|
T. Rowe Price Associates
· Reduced
Change
−339K
Date
Q1 2026
|
T. Rowe Price Associates | Reduced· Q1 2026 | – | −339K | – | Q1 2026 | |||||
|
Armistice Capital, LLC
· Reduced
Change
−320K
Date
Q1 2026
|
Armistice Capital, LLC | Reduced· Q1 2026 | – | −320K | – | Q1 2026 | |||||
|
Parkman Healthcare Partners LLC
· Added
Change
+304K
Date
Q1 2026
|
Parkman Healthcare Partners LLC | Added· Q1 2026 | – | +304K | – | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Backstrom Jay T.
· Director
Exercise or conversion (M/X/C)
-1K
|
Backstrom Jay T. | Director | Exercise or conversion (M/X/C) | – | -1K | – | 3K | – | Jul 8, 2026 | Jul 10, 2026 | |||||||||
|
Backstrom Jay T.
· Director
Grant (A)
1K
|
Backstrom Jay T. | Director | Grant (A) | – | 1K | – | 1K | – | Jul 8, 2026 | Jul 10, 2026 | |||||||||
|
Gheuens Sarah
· Officer
Sell
−$151K
|
Gheuens Sarah | Officer | Sell | $37.56 | −4K | −$151K | 85K | −4.5% | Jul 1, 2026 | Jul 2, 2026 | |||||||||
|
Gheuens Sarah
· Officer
2 operations
0
|
Gheuens Sarah | Officer | 2 operations | – | 0 | – | 0 | – | Jul 1, 2026 | Jul 2, 2026 | |||||||||
|
Ballal Rahul D.
· Director
2 operations
0
|
Ballal Rahul D. | Director | 2 operations | – | 0 | – | 0 | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Ballal Rahul D.
· Director
2 operations
18K
|
Ballal Rahul D. | Director | 2 operations | – | 18K | – | 15K | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Capello Jeffrey D.
· Director
2 operations
0
|
Capello Jeffrey D. | Director | 2 operations | – | 0 | – | 0 | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Capello Jeffrey D.
· Director
2 operations
18K
|
Capello Jeffrey D. | Director | 2 operations | – | 18K | – | 15K | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Foster-Cheek Kaye I.
· Director
2 operations
0
|
Foster-Cheek Kaye I. | Director | 2 operations | – | 0 | – | 0 | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Foster-Cheek Kaye I.
· Director
2 operations
18K
|
Foster-Cheek Kaye I. | Director | 2 operations | – | 18K | – | 15K | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Fouse Jacqualyn A.
· Director
2 operations
0
|
Fouse Jacqualyn A. | Director | 2 operations | – | 0 | – | 0 | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Fouse Jacqualyn A.
· Director
2 operations
18K
|
Fouse Jacqualyn A. | Director | 2 operations | – | 18K | – | 15K | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Ho Maykin
· Director
2 operations
0
|
Ho Maykin | Director | 2 operations | – | 0 | – | 0 | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Ho Maykin
· Director
2 operations
18K
|
Ho Maykin | Director | 2 operations | – | 18K | – | 15K | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Owen Adams Catherine
· Director
2 operations
0
|
Owen Adams Catherine | Director | 2 operations | – | 0 | – | 0 | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
N
A
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A
A
226 reporting institutions disclosed AGIO 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.