Rtw Investments, LP
· Exited
Change
−888K
Δ Own
−100.0%
Date
Q1 2026
AX
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Rtw Investments, LP
· Exited
Change
−888K
Δ Own
−100.0%
Date
Q1 2026
|
Rtw Investments, LP | Exited· Q1 2026 | – | −888K | −100.0% | Q1 2026 | |||||
|
First Trust Advisors LP
· Added
Change
+534K
Date
Q1 2026
|
First Trust Advisors LP | Added· Q1 2026 | – | +534K | – | Q1 2026 | |||||
|
Norges
· Exited
Change
−495K
Δ Own
−100.0%
Date
Q1 2026
|
Norges | Exited· Q1 2026 | – | −495K | −100.0% | Q1 2026 | |||||
|
Point72 Asset Management, L.P.
· Added
Change
+407K
Δ Own
+2259.9%
Date
Q1 2026
|
Point72 Asset Management, L.P. | Added· Q1 2026 | – | +407K | +2259.9% | Q1 2026 | |||||
|
Assenagon Asset Management S.A.
· Added
Change
+398K
Date
Q1 2026
|
Assenagon Asset Management S.A. | Added· Q1 2026 | – | +398K | – | Q1 2026 | |||||
|
FMR LLC
· Added
Change
+385K
Δ Own
+32.6%
Date
Q1 2026
|
FMR LLC | Added· Q1 2026 | – | +385K | +32.6% | Q1 2026 | |||||
|
Adage Capital Partners Gp, L.L.C.
· Added
Change
+370K
Date
Q1 2026
|
Adage Capital Partners Gp, L.L.C. | Added· Q1 2026 | – | +370K | – | Q1 2026 | |||||
|
Nationale-Nederlanden Powszechne Towarzystwo Emerytalne S.A.
· Exited
Change
−279K
Δ Own
−100.0%
Date
Q1 2026
|
Nationale-Nederlanden Powszechne Towarzystwo Emerytalne S.A. | Exited· Q1 2026 | – | −279K | −100.0% | Q1 2026 | |||||
|
Vestal Point Capital, LP
· Exited
Change
−210K
Δ Own
−100.0%
Date
Q1 2026
|
Vestal Point Capital, LP | Exited· Q1 2026 | – | −210K | −100.0% | Q1 2026 | |||||
|
Sofinnova Investments, Inc.
· Added
Change
+200K
Date
Q1 2026
|
Sofinnova Investments, Inc. | Added· Q1 2026 | – | +200K | – | Q1 2026 | |||||
|
T. Rowe Price Associates
· Reduced
Change
−193K
Date
Q1 2026
|
T. Rowe Price Associates | Reduced· Q1 2026 | – | −193K | – | Q1 2026 | |||||
|
UBS Group AG
· Added
Change
+192K
Date
Q1 2026
|
UBS Group AG | Added· Q1 2026 | – | +192K | – | Q1 2026 | |||||
|
Two Sigma Advisers, LP
· Exited
Change
−188K
Δ Own
−100.0%
Date
Q1 2026
|
Two Sigma Advisers, LP | Exited· Q1 2026 | – | −188K | −100.0% | Q1 2026 | |||||
|
Vanguard
· Added
Change
+188K
Date
Q1 2026
|
Vanguard | Added· Q1 2026 | – | +188K | – | Q1 2026 | |||||
|
Marshall Wace, LLP
· Reduced
Change
−179K
Date
Q1 2026
|
Marshall Wace, LLP | Reduced· Q1 2026 | – | −179K | – | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Tabuteau Herriot
· Director
Sell
−$12M
|
Tabuteau Herriot | Director | Sell | $240.25 | −50K | −$12M | 7K | −87.3% | Jul 1, 2026 | Jul 1, 2026 | |||||||||
|
Tabuteau Herriot
· Director
2 operations
0
|
Tabuteau Herriot | Director | 2 operations | $4.95 | 0 | – | 50K | – | Jul 1, 2026 | Jul 1, 2026 | |||||||||
|
Jeffs Roger
· Director
Sell
−$71K
|
Jeffs Roger | Director | Sell | $249.12 | −286 | −$71K | 58K | – | Jun 11, 2026 | Jun 11, 2026 | |||||||||
|
Jeffs Roger
· Director
Sell
−$70K
|
Jeffs Roger | Director | Sell | $246.18 | −286 | −$70K | 59K | – | Jun 10, 2026 | Jun 11, 2026 | |||||||||
|
Mahony Susan
· Director
Sell
−$74K
|
Mahony Susan | Director | Sell | $246.18 | −300 | −$74K | 829 | – | Jun 10, 2026 | Jun 10, 2026 | |||||||||
|
Coleman Mark
· Director
Sell
−$160K
|
Coleman Mark | Director | Sell | $249.00 | −643 | −$160K | 30K | – | Jun 10, 2026 | Jun 10, 2026 | |||||||||
|
Mahony Susan
· Director
Sell
−$71K
|
Mahony Susan | Director | Sell | $237.21 | −300 | −$71K | 1K | – | Jun 9, 2026 | Jun 10, 2026 | |||||||||
|
Tabuteau Herriot
· Director
Sell
−$12M
|
Tabuteau Herriot | Director | Sell | $241.01 | −50K | −$12M | 7K | – | Jun 9, 2026 | Jun 9, 2026 | |||||||||
|
Tabuteau Herriot
· Director
2 operations
0
|
Tabuteau Herriot | Director | 2 operations | $4.95 | 0 | – | 99K | – | Jun 9, 2026 | Jun 9, 2026 | |||||||||
|
Pizzie Nick
· CFO
Sell
−$7.9M
|
Pizzie Nick | CFO | Sell | $240.09 | −33K | −$7.9M | 43K | – | Jun 9, 2026 | Jun 9, 2026 | |||||||||
|
Pizzie Nick
· CFO
2 operations
0
|
Pizzie Nick | CFO | 2 operations | $3.50 | 0 | – | 72K | – | Jun 9, 2026 | Jun 9, 2026 | |||||||||
|
Jeffs Roger
· Director
2 operations
0
|
Jeffs Roger | Director | 2 operations | – | 0 | – | 0 | – | Jun 8, 2026 | Jun 10, 2026 | |||||||||
|
Saad Mark E.
· Director
2 operations
0
|
Saad Mark E. | Director | 2 operations | – | 0 | – | 0 | – | Jun 8, 2026 | Jun 10, 2026 | |||||||||
|
Mahony Susan
· Director
2 operations
0
|
Mahony Susan | Director | 2 operations | – | 0 | – | 0 | – | Jun 8, 2026 | Jun 10, 2026 | |||||||||
|
Coleman Mark
· Director
2 operations
0
|
Coleman Mark | Director | 2 operations | – | 0 | – | 0 | – | Jun 8, 2026 | Jun 10, 2026 | |||||||||
N
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397 reporting institutions disclosed AXSM 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.