Ra Capital Management, L.P.
· New
Change
+3.9M
Date
Q1 2026
SR
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Ra Capital Management, L.P.
· New
Change
+3.9M
Date
Q1 2026
|
Ra Capital Management, L.P. | New· Q1 2026 | – | +3.9M | – | Q1 2026 | |||||
|
Two Sigma Investments, LP
· Added
Change
+2.2M
Δ Own
+88.1%
Date
Q1 2026
|
Two Sigma Investments, LP | Added· Q1 2026 | – | +2.2M | +88.1% | Q1 2026 | |||||
|
First Trust Advisors LP
· Added
Change
+2.1M
Date
Q1 2026
|
First Trust Advisors LP | Added· Q1 2026 | – | +2.1M | – | Q1 2026 | |||||
|
Two Sigma Advisers, LP
· Exited
Change
−2.1M
Δ Own
−100.0%
Date
Q1 2026
|
Two Sigma Advisers, LP | Exited· Q1 2026 | – | −2.1M | −100.0% | Q1 2026 | |||||
|
AQR Capital Management LLC
· Reduced
Change
−1.4M
Date
Q1 2026
|
AQR Capital Management LLC | Reduced· Q1 2026 | – | −1.4M | – | Q1 2026 | |||||
|
D. E. Shaw & Co., Inc.
· Reduced
Change
−1.1M
Δ Own
−69.2%
Date
Q1 2026
|
D. E. Shaw & Co., Inc. | Reduced· Q1 2026 | – | −1.1M | −69.2% | Q1 2026 | |||||
|
Canada Pension Plan Investment Board
· Added
Change
+896K
Date
Q1 2026
|
Canada Pension Plan Investment Board | Added· Q1 2026 | – | +896K | – | Q1 2026 | |||||
|
Morgan Stanley
· Added
Change
+684K
Date
Q1 2026
|
Morgan Stanley | Added· Q1 2026 | – | +684K | – | Q1 2026 | |||||
|
Legal & General
· Added
Change
+602K
Date
Q1 2026
|
Legal & General | Added· Q1 2026 | – | +602K | – | Q1 2026 | |||||
|
Marshall Wace, LLP
· Added
Change
+582K
Date
Q1 2026
|
Marshall Wace, LLP | Added· Q1 2026 | – | +582K | – | Q1 2026 | |||||
|
Hotchkis & Wiley Capital Management LLC
· New
Change
+560K
Date
Q1 2026
|
Hotchkis & Wiley Capital Management LLC | New· Q1 2026 | – | +560K | – | Q1 2026 | |||||
|
Citadel Advisors LLC
· Added
Change
+533K
Δ Own
+449.3%
Date
Q1 2026
|
Citadel Advisors LLC | Added· Q1 2026 | – | +533K | +449.3% | Q1 2026 | |||||
|
Goldman Sachs Group Inc
· Added
Change
+515K
Date
Q1 2026
|
Goldman Sachs Group Inc | Added· Q1 2026 | – | +515K | – | Q1 2026 | |||||
|
Renaissance Technologies LLC
· Added
Change
+506K
Δ Own
+43.6%
Date
Q1 2026
|
Renaissance Technologies LLC | Added· Q1 2026 | – | +506K | +43.6% | Q1 2026 | |||||
|
Federated Hermes, Inc.
· Added
Change
+473K
Date
Q1 2026
|
Federated Hermes, Inc. | Added· Q1 2026 | – | +473K | – | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Boor Kathryn Jean
· Director
Grant (A)
17K
|
Boor Kathryn Jean | Director | Grant (A) | – | 17K | – | 25K | – | Jun 4, 2026 | Jun 5, 2026 | |||||||||
|
Mayo Stephen
· Director
Grant (A)
17K
|
Mayo Stephen | Director | Grant (A) | – | 17K | – | 19K | – | Jun 4, 2026 | Jun 5, 2026 | |||||||||
|
Wigzell Hans Lennart Rudolf
· Director
Grant (A)
17K
|
Wigzell Hans Lennart Rudolf | Director | Grant (A) | – | 17K | – | 42K | – | Jun 4, 2026 | Jun 5, 2026 | |||||||||
|
Behrens M. Kathleen
· Director
Grant (A)
17K
|
Behrens M. Kathleen | Director | Grant (A) | – | 17K | – | 214K | – | Jun 4, 2026 | Jun 5, 2026 | |||||||||
|
Connelly Deirdre P.
· Director
Grant (A)
17K
|
Connelly Deirdre P. | Director | Grant (A) | – | 17K | – | 22K | – | Jun 4, 2026 | Jun 5, 2026 | |||||||||
|
Nicaise Claude
· Director
Grant (A)
17K
|
Nicaise Claude | Director | Grant (A) | – | 17K | – | 48K | – | Jun 4, 2026 | Jun 5, 2026 | |||||||||
|
Chambers Michael Andrew
· Director
Grant (A)
17K
|
Chambers Michael Andrew | Director | Grant (A) | – | 17K | – | 28K | – | Jun 4, 2026 | Jun 5, 2026 | |||||||||
|
Barry Richard
· Director
Grant (A)
17K
|
Barry Richard | Director | Grant (A) | – | 17K | – | 3.0M | – | Jun 4, 2026 | Jun 5, 2026 | |||||||||
|
Mayo Stephen
· Director
Sell
−$123K
|
Mayo Stephen | Director | Sell | $17.02 | −7K | −$123K | 2K | – | Mar 12, 2026 | Mar 13, 2026 | |||||||||
|
Estepan Ian Michael
· Officer
Tax withholding or exercise payment (F)
-$19K
|
Estepan Ian Michael | Officer | Tax withholding or exercise payment (F) | $17.03 | -1K | -$19K | 202K | – | Mar 11, 2026 | Mar 13, 2026 | |||||||||
|
Wong Ryan Ho-Yan
· Officer
Tax withholding or exercise payment (F)
-$4K
|
Wong Ryan Ho-Yan | Officer | Tax withholding or exercise payment (F) | $17.03 | -256 | -$4K | 135K | – | Mar 11, 2026 | Mar 13, 2026 | |||||||||
|
Rodino-Klapac Louise
· Officer
Tax withholding or exercise payment (F)
-$16K
|
Rodino-Klapac Louise | Officer | Tax withholding or exercise payment (F) | $17.03 | -948 | -$16K | 225K | – | Mar 11, 2026 | Mar 13, 2026 | |||||||||
|
Rothfuss Cristin
· Officer
Tax withholding or exercise payment (F)
-$17K
|
Rothfuss Cristin | Officer | Tax withholding or exercise payment (F) | $17.03 | -974 | -$17K | 138K | – | Mar 11, 2026 | Mar 13, 2026 | |||||||||
|
Wong Ryan Ho-Yan
· Officer
2 operations
-$5K
|
Wong Ryan Ho-Yan | Officer | 2 operations | $16.95 | -275 | -$5K | 135K | – | Mar 9, 2026 | Mar 11, 2026 | |||||||||
|
Rothfuss Cristin
· Officer
2 operations
-$14K
|
Rothfuss Cristin | Officer | 2 operations | $16.95 | -830 | -$14K | 139K | – | Mar 9, 2026 | Mar 11, 2026 | |||||||||
N
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326 reporting institutions disclosed SRPT 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.