Castleknight Management LP
· Added
Change
+775K
Date
Q1 2026
AM
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Castleknight Management LP
· Added
Change
+775K
Date
Q1 2026
|
Castleknight Management LP | Added· Q1 2026 | – | +775K | – | Q1 2026 | |||||
|
Two Sigma Advisers, LP
· Exited
Change
−454K
Δ Own
−100.0%
Date
Q1 2026
|
Two Sigma Advisers, LP | Exited· Q1 2026 | – | −454K | −100.0% | Q1 2026 | |||||
|
AQR Capital Management LLC
· Added
Change
+400K
Date
Q1 2026
|
AQR Capital Management LLC | Added· Q1 2026 | – | +400K | – | Q1 2026 | |||||
|
Allspring Global Investments Holdings, LLC
· Added
Change
+349K
Date
Q1 2026
|
Allspring Global Investments Holdings, LLC | Added· Q1 2026 | – | +349K | – | Q1 2026 | |||||
|
D. E. Shaw & Co., Inc.
· Reduced
Change
−317K
Δ Own
−26.7%
Date
Q1 2026
|
D. E. Shaw & Co., Inc. | Reduced· Q1 2026 | – | −317K | −26.7% | Q1 2026 | |||||
|
Schwab
· Reduced
Change
−294K
Date
Q1 2026
|
Schwab | Reduced· Q1 2026 | – | −294K | – | Q1 2026 | |||||
|
Millennium Management LLC
· Reduced
Change
−293K
Date
Q1 2026
|
Millennium Management LLC | Reduced· Q1 2026 | – | −293K | – | Q1 2026 | |||||
|
Acadian Asset Management LLC
· Added
Change
+236K
Date
Q1 2026
|
Acadian Asset Management LLC | Added· Q1 2026 | – | +236K | – | Q1 2026 | |||||
|
American Century Companies Inc
· Added
Change
+227K
Date
Q1 2026
|
American Century Companies Inc | Added· Q1 2026 | – | +227K | – | Q1 2026 | |||||
|
JPMorgan Chase & Co
· Reduced
Change
−179K
Date
Q1 2026
|
JPMorgan Chase & Co | Reduced· Q1 2026 | – | −179K | – | Q1 2026 | |||||
|
Two Sigma Investments, LP
· Added
Change
+179K
Δ Own
+27.0%
Date
Q1 2026
|
Two Sigma Investments, LP | Added· Q1 2026 | – | +179K | +27.0% | Q1 2026 | |||||
|
Segall Bryant & Hamill, LLC
· New
Change
+156K
Date
Q1 2026
|
Segall Bryant & Hamill, LLC | New· Q1 2026 | – | +156K | – | Q1 2026 | |||||
|
Morgan Stanley
· Reduced
Change
−149K
Date
Q1 2026
|
Morgan Stanley | Reduced· Q1 2026 | – | −149K | – | Q1 2026 | |||||
|
Point72 Asset Management, L.P.
· New
Change
+135K
Date
Q1 2026
|
Point72 Asset Management, L.P. | New· Q1 2026 | – | +135K | – | Q1 2026 | |||||
|
Algert Global LLC
· Exited
Change
−133K
Δ Own
−100.0%
Date
Q1 2026
|
Algert Global LLC | Exited· Q1 2026 | – | −133K | −100.0% | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dolan James Lawrence
· Director
Grant (A)
11K
|
Dolan James Lawrence | Director | Grant (A) | – | 11K | – | 11K | – | Jun 16, 2026 | Jun 22, 2026 | |||||||||
|
Sweeney Brian
· Director
Grant (A)
11K
|
Sweeney Brian | Director | Grant (A) | – | 11K | – | 11K | – | Jun 16, 2026 | Jun 18, 2026 | |||||||||
|
Dolan Aidan J.
· Director
Grant (A)
11K
|
Dolan Aidan J. | Director | Grant (A) | – | 11K | – | 11K | – | Jun 16, 2026 | Jun 18, 2026 | |||||||||
|
Dolan Thomas Charles
· Director
Grant (A)
11K
|
Dolan Thomas Charles | Director | Grant (A) | – | 11K | – | 11K | – | Jun 16, 2026 | Jun 18, 2026 | |||||||||
|
Cox Christopher James
· Director
Grant (A)
11K
|
Cox Christopher James | Director | Grant (A) | – | 11K | – | 11K | – | Jun 16, 2026 | Jun 17, 2026 | |||||||||
|
Perelman Debra Golding
· Director
Grant (A)
11K
|
Perelman Debra Golding | Director | Grant (A) | – | 11K | – | 11K | – | Jun 16, 2026 | Jun 17, 2026 | |||||||||
|
Tese Vincent
· Director
Grant (A)
11K
|
Tese Vincent | Director | Grant (A) | – | 11K | – | 11K | – | Jun 16, 2026 | Jun 17, 2026 | |||||||||
|
Vogel Carl E.
· Director
Grant (A)
11K
|
Vogel Carl E. | Director | Grant (A) | – | 11K | – | 11K | – | Jun 16, 2026 | Jun 17, 2026 | |||||||||
|
Blank Matthew
· Director
Grant (A)
11K
|
Blank Matthew | Director | Grant (A) | – | 11K | – | 11K | – | Jun 16, 2026 | Jun 17, 2026 | |||||||||
|
Dolan Kristin A.
· CEO
Grant (A)
504K
|
Dolan Kristin A. | CEO | Grant (A) | – | 504K | – | 504K | – | Mar 11, 2026 | Mar 13, 2026 | |||||||||
|
Sherin Michael J. III
· Officer
Grant (A)
21K
|
Sherin Michael J. III | Officer | Grant (A) | – | 21K | – | 21K | – | Mar 11, 2026 | Mar 13, 2026 | |||||||||
|
Kelleher Kimberly
· Officer
Grant (A)
88K
|
Kelleher Kimberly | Officer | Grant (A) | – | 88K | – | 88K | – | Mar 11, 2026 | Mar 13, 2026 | |||||||||
|
McDermott Dan
· Officer
Grant (A)
101K
|
McDermott Dan | Officer | Grant (A) | – | 101K | – | 101K | – | Mar 11, 2026 | Mar 13, 2026 | |||||||||
|
Romanello Salvatore
· Officer
Grant (A)
50K
|
Romanello Salvatore | Officer | Grant (A) | – | 50K | – | 50K | – | Mar 11, 2026 | Mar 13, 2026 | |||||||||
|
Sherin Michael J. III
· Officer
3 operations
−$47K
|
Sherin Michael J. III | Officer | 3 operations | $7.95–$7.98 | −6K | −$47K | 11K | – | Mar 10, 2026 | Mar 11, 2026 | |||||||||
N
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164 reporting institutions disclosed AMCX 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.