JPMorgan Chase & Co
· Added
Change
+5.1M
Date
Q1 2026
AM
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
JPMorgan Chase & Co
· Added
Change
+5.1M
Date
Q1 2026
|
JPMorgan Chase & Co | Added· Q1 2026 | – | +5.1M | – | Q1 2026 | |||||
|
Discovery Capital Management, LLC / Ct
· Exited
Change
−2.6M
Δ Own
−100.0%
Date
Q1 2026
|
Discovery Capital Management, LLC / Ct | Exited· Q1 2026 | – | −2.6M | −100.0% | Q1 2026 | |||||
|
Jane Street Group, LLC
· Added
Change
+2.3M
Date
Q1 2026
|
Jane Street Group, LLC | Added· Q1 2026 | – | +2.3M | – | Q1 2026 | |||||
|
Dimensional
· Reduced
Change
−1.8M
Date
Q1 2026
|
Dimensional | Reduced· Q1 2026 | – | −1.8M | – | Q1 2026 | |||||
|
Lsv Asset Management
· Reduced
Change
−1.5M
Date
Q1 2026
|
Lsv Asset Management | Reduced· Q1 2026 | – | −1.5M | – | Q1 2026 | |||||
|
Bridgewater Associates, LP
· Added
Change
+1.5M
Δ Own
+1976.4%
Date
Q1 2026
|
Bridgewater Associates, LP | Added· Q1 2026 | – | +1.5M | +1976.4% | Q1 2026 | |||||
|
Norges
· Exited
Change
−1.4M
Δ Own
−100.0%
Date
Q1 2026
|
Norges | Exited· Q1 2026 | – | −1.4M | −100.0% | Q1 2026 | |||||
|
D. E. Shaw & Co., Inc.
· Added
Change
+1.3M
Δ Own
+861.8%
Date
Q1 2026
|
D. E. Shaw & Co., Inc. | Added· Q1 2026 | – | +1.3M | +861.8% | Q1 2026 | |||||
|
Trexquant Investment LP
· New
Change
+1.1M
Date
Q1 2026
|
Trexquant Investment LP | New· Q1 2026 | – | +1.1M | – | Q1 2026 | |||||
|
Voloridge Investment Management, LLC
· New
Change
+1.1M
Date
Q1 2026
|
Voloridge Investment Management, LLC | New· Q1 2026 | – | +1.1M | – | Q1 2026 | |||||
|
Squarepoint Ops LLC
· New
Change
+967K
Date
Q1 2026
|
Squarepoint Ops LLC | New· Q1 2026 | – | +967K | – | Q1 2026 | |||||
|
First Trust Advisors LP
· Reduced
Change
−929K
Date
Q1 2026
|
First Trust Advisors LP | Reduced· Q1 2026 | – | −929K | – | Q1 2026 | |||||
|
American Century Companies Inc
· Reduced
Change
−864K
Date
Q1 2026
|
American Century Companies Inc | Reduced· Q1 2026 | – | −864K | – | Q1 2026 | |||||
|
Burkehill Global Management, LP
· New
Change
+800K
Date
Q1 2026
|
Burkehill Global Management, LP | New· Q1 2026 | – | +800K | – | Q1 2026 | |||||
|
Arrowstreet Capital, Limited Partnership
· Reduced
Change
−788K
Date
Q1 2026
|
Arrowstreet Capital, Limited Partnership | Reduced· Q1 2026 | – | −788K | – | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Kim Agnes C.
· Other
2 operations
$4.3M
|
Kim Agnes C. | Other | 2 operations | $9.48–$9.86 | 450K | $4.3M | 11.2M | +4.2% | Jul 20, 2026 | Jul 22, 2026 | |||||||||
|
Kim James J.
· 10% Owner
4 operations
0
|
Kim James J. | 10% Owner | 4 operations | $9.48–$9.86 | 0 | – | 0 | – | Jul 20, 2026 | Jul 22, 2026 | |||||||||
|
Rogers Mark N.
· Officer
Sell
−$326K
|
Rogers Mark N. | Officer | Sell | $65.12 | −5K | −$326K | 39K | −11.4% | Jul 16, 2026 | Jul 20, 2026 | |||||||||
|
Rogers Mark N.
· Officer
2 operations
0
|
Rogers Mark N. | Officer | 2 operations | $7.40 | 0 | – | 75K | – | Jul 16, 2026 | Jul 20, 2026 | |||||||||
|
Faust Megan
· Officer
Sell
−$70K
|
Faust Megan | Officer | Sell | $69.91 | −1K | −$70K | 136K | −0.7% | Jul 14, 2026 | Jul 16, 2026 | |||||||||
|
Engel Kevin K.
· Director
2 operations
0
|
Engel Kevin K. | Director | 2 operations | – | 0 | – | 0 | – | Jun 30, 2026 | Jul 2, 2026 | |||||||||
|
Engel Kevin K.
· Director
Tax withholding or exercise payment (F)
-$321K
|
Engel Kevin K. | Director | Tax withholding or exercise payment (F) | $86.23 | -4K | -$321K | 13K | −22.4% | Jun 30, 2026 | Jul 2, 2026 | |||||||||
|
Faust Megan
· Officer
2 operations
0
|
Faust Megan | Officer | 2 operations | – | 0 | – | 0 | – | Jun 30, 2026 | Jul 2, 2026 | |||||||||
|
Faust Megan
· Officer
Tax withholding or exercise payment (F)
-$321K
|
Faust Megan | Officer | Tax withholding or exercise payment (F) | $86.23 | -4K | -$321K | 137K | −2.6% | Jun 30, 2026 | Jul 2, 2026 | |||||||||
|
Rutten Guillaume Marie Jean
· Director
2 operations
0
|
Rutten Guillaume Marie Jean | Director | 2 operations | – | 0 | – | 0 | – | Jun 30, 2026 | Jul 2, 2026 | |||||||||
|
Kim Susan Y.
· Director
Grant (A)
3
|
Kim Susan Y. | Director | Grant (A) | – | 3 | – | 3K | – | Jun 23, 2026 | Jun 25, 2026 | |||||||||
|
Watson David N.
· Director
Grant (A)
3
|
Watson David N. | Director | Grant (A) | – | 3 | – | 3K | – | Jun 23, 2026 | Jun 25, 2026 | |||||||||
|
Tily Gil C.
· Director
Grant (A)
3
|
Tily Gil C. | Director | Grant (A) | – | 3 | – | 3K | – | Jun 23, 2026 | Jun 25, 2026 | |||||||||
|
Rutten Guillaume Marie Jean
· Director
Grant (A)
3
|
Rutten Guillaume Marie Jean | Director | Grant (A) | – | 3 | – | 3K | – | Jun 23, 2026 | Jun 25, 2026 | |||||||||
|
Morse Robert Randolph
· Director
3 operations
20
|
Morse Robert Randolph | Director | 3 operations | – | 20 | – | 3K | – | Jun 23, 2026 | Jun 25, 2026 | |||||||||
N
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510 reporting institutions disclosed AMKR 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.