Janus Henderson Group PLC
· Added
Change
+434K
Date
Q1 2026
MD
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Janus Henderson Group PLC
· Added
Change
+434K
Date
Q1 2026
|
Janus Henderson Group PLC | Added· Q1 2026 | – | +434K | – | Q1 2026 | |||||
|
Citadel Advisors LLC
· Added
Change
+418K
Δ Own
+1156.0%
Date
Q1 2026
|
Citadel Advisors LLC | Added· Q1 2026 | – | +418K | +1156.0% | Q1 2026 | |||||
|
Paulson & Co. Inc.
· Reduced
Change
−315K
Date
Q1 2026
|
Paulson & Co. Inc. | Reduced· Q1 2026 | – | −315K | – | Q1 2026 | |||||
|
Wellington Management Group LLP
· Added
Change
+234K
Δ Own
+50.6%
Date
Q1 2026
|
Wellington Management Group LLP | Added· Q1 2026 | – | +234K | +50.6% | Q1 2026 | |||||
|
Bank of America Corp
· Reduced
Change
−226K
Date
Q1 2026
|
Bank of America Corp | Reduced· Q1 2026 | – | −226K | – | Q1 2026 | |||||
|
Norges
· Exited
Change
−196K
Δ Own
−100.0%
Date
Q1 2026
|
Norges | Exited· Q1 2026 | – | −196K | −100.0% | Q1 2026 | |||||
|
Adage Capital Partners Gp, L.L.C.
· Added
Change
+162K
Date
Q1 2026
|
Adage Capital Partners Gp, L.L.C. | Added· Q1 2026 | – | +162K | – | Q1 2026 | |||||
|
Alkeon Capital Management LLC
· Reduced
Change
−160K
Date
Q1 2026
|
Alkeon Capital Management LLC | Reduced· Q1 2026 | – | −160K | – | Q1 2026 | |||||
|
Toronto Dominion Bank
· New
Change
+130K
Date
Q1 2026
|
Toronto Dominion Bank | New· Q1 2026 | – | +130K | – | Q1 2026 | |||||
|
Alliancebernstein L.P.
· Added
Change
+104K
Date
Q1 2026
|
Alliancebernstein L.P. | Added· Q1 2026 | – | +104K | – | Q1 2026 | |||||
|
Point72 Asset Management, L.P.
· Added
Change
+99K
Δ Own
+78.4%
Date
Q1 2026
|
Point72 Asset Management, L.P. | Added· Q1 2026 | – | +99K | +78.4% | Q1 2026 | |||||
|
Mpm Bioimpact LLC
· Exited
Change
−97K
Δ Own
−100.0%
Date
Q1 2026
|
Mpm Bioimpact LLC | Exited· Q1 2026 | – | −97K | −100.0% | Q1 2026 | |||||
|
Westfield Capital Management Co LP
· New
Change
+95K
Date
Q1 2026
|
Westfield Capital Management Co LP | New· Q1 2026 | – | +95K | – | Q1 2026 | |||||
|
Deutsche Bank AG
· Reduced
Change
−94K
Date
Q1 2026
|
Deutsche Bank AG | Reduced· Q1 2026 | – | −94K | – | Q1 2026 | |||||
|
Logos Global Management LP
· New
Change
+85K
Date
Q1 2026
|
Logos Global Management LP | New· Q1 2026 | – | +85K | – | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Sibold William John
· Director
10 operations
−$1.4M
|
Sibold William John | Director | 10 operations | $542.75–$555.05 | −2K | −$1.4M | 209K | −1.2% | Jul 20, 2026 | Jul 20, 2026 | |||||||||
|
Sibold William John
· Director
2 operations
0
|
Sibold William John | Director | 2 operations | – | 0 | – | 0 | – | Jul 17, 2026 | Jul 20, 2026 | |||||||||
|
Taub Rebecca
· Director
2 operations
1K
|
Taub Rebecca | Director | 2 operations | – | 1K | – | 766 | – | Jun 17, 2026 | Jun 18, 2026 | |||||||||
|
Levy Richard S.
· Director
2 operations
1K
|
Levy Richard S. | Director | 2 operations | – | 1K | – | 766 | – | Jun 17, 2026 | Jun 18, 2026 | |||||||||
|
Fouse Jacqualyn A.
· Director
2 operations
1K
|
Fouse Jacqualyn A. | Director | 2 operations | – | 1K | – | 766 | – | Jun 17, 2026 | Jun 18, 2026 | |||||||||
|
Daly James M.
· Director
2 operations
1K
|
Daly James M. | Director | 2 operations | – | 1K | – | 766 | – | Jun 17, 2026 | Jun 18, 2026 | |||||||||
|
Brennan Daniel J.
· Director
2 operations
1K
|
Brennan Daniel J. | Director | 2 operations | – | 1K | – | 681 | – | Jun 17, 2026 | Jun 18, 2026 | |||||||||
|
Baker Bros. Advisors LP
· Director
4 operations
5K
|
Baker Bros. Advisors LP | Director | 4 operations | – | 5K | – | 2K | – | Jun 17, 2026 | Jun 18, 2026 | |||||||||
|
Soergel David
· Officer
Sell
−$517K
|
Soergel David | Officer | Sell | $495.74 | −1K | −$517K | 10K | – | Jun 1, 2026 | Jun 1, 2026 | |||||||||
|
Levy Richard S.
· Director
12 operations
−$2.9M
|
Levy Richard S. | Director | 12 operations | $506.68–$519.98 | −6K | −$2.9M | 22K | – | May 22, 2026 | May 22, 2026 | |||||||||
|
Soergel David
· Officer
Sell
−$435K
|
Soergel David | Officer | Sell | $515.90 | −844 | −$435K | 11K | – | May 18, 2026 | May 18, 2026 | |||||||||
|
Dier Mardi
· Officer
12 operations
−$854K
|
Dier Mardi | Officer | 12 operations | $425.08–$437.65 | −2K | −$854K | 13K | – | Mar 6, 2026 | Mar 6, 2026 | |||||||||
|
Sibold William John
· Director, Officer
Sell
−$718K
|
Sibold William John | Director, Officer | Sell | $431.94 | −2K | −$718K | 162K | – | Mar 6, 2026 | Mar 6, 2026 | |||||||||
|
Kelley Shannon T.
· Officer
Sell
−$155K
|
Kelley Shannon T. | Officer | Sell | $431.94 | −360 | −$155K | 12K | – | Mar 6, 2026 | Mar 6, 2026 | |||||||||
|
Huntsman Carole
· Officer
Sell
−$181K
|
Huntsman Carole | Officer | Sell | $431.94 | −419 | −$181K | 13K | – | Mar 6, 2026 | Mar 6, 2026 | |||||||||
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372 reporting institutions disclosed MDGL 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.