Pertento Partners LLP
· Reduced
Change
−739K
Date
Q1 2026
SI
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Pertento Partners LLP
· Reduced
Change
−739K
Date
Q1 2026
|
Pertento Partners LLP | Reduced· Q1 2026 | – | −739K | – | Q1 2026 | |||||
|
Analog Century Management LP
· New
Change
+539K
Date
Q1 2026
|
Analog Century Management LP | New· Q1 2026 | – | +539K | – | Q1 2026 | |||||
|
Wellington Management Group LLP
· Reduced
Change
−393K
Δ Own
−56.3%
Date
Q1 2026
|
Wellington Management Group LLP | Reduced· Q1 2026 | – | −393K | −56.3% | Q1 2026 | |||||
|
Hawk Ridge Capital Management LP
· Added
Change
+386K
Date
Q1 2026
|
Hawk Ridge Capital Management LP | Added· Q1 2026 | – | +386K | – | Q1 2026 | |||||
|
Voya Investment Management LLC
· New
Change
+382K
Date
Q1 2026
|
Voya Investment Management LLC | New· Q1 2026 | – | +382K | – | Q1 2026 | |||||
|
Adage Capital Partners Gp, L.L.C.
· Reduced
Change
−317K
Date
Q1 2026
|
Adage Capital Partners Gp, L.L.C. | Reduced· Q1 2026 | – | −317K | – | Q1 2026 | |||||
|
Think Investments LP
· Exited
Change
−289K
Δ Own
−100.0%
Date
Q1 2026
|
Think Investments LP | Exited· Q1 2026 | – | −289K | −100.0% | Q1 2026 | |||||
|
Reinhart Partners, LLC.
· Reduced
Change
−259K
Date
Q1 2026
|
Reinhart Partners, LLC. | Reduced· Q1 2026 | – | −259K | – | Q1 2026 | |||||
|
Qube Research & Technologies Ltd
· Added
Change
+256K
Date
Q1 2026
|
Qube Research & Technologies Ltd | Added· Q1 2026 | – | +256K | – | Q1 2026 | |||||
|
Millennium Management LLC
· Added
Change
+249K
Date
Q1 2026
|
Millennium Management LLC | Added· Q1 2026 | – | +249K | – | Q1 2026 | |||||
|
Castleknight Management LP
· Added
Change
+241K
Date
Q1 2026
|
Castleknight Management LP | Added· Q1 2026 | – | +241K | – | Q1 2026 | |||||
|
Arrowstreet Capital, Limited Partnership
· Added
Change
+225K
Date
Q1 2026
|
Arrowstreet Capital, Limited Partnership | Added· Q1 2026 | – | +225K | – | Q1 2026 | |||||
|
Invesco Ltd.
· Reduced
Change
−214K
Δ Own
−33.8%
Date
Q1 2026
|
Invesco Ltd. | Reduced· Q1 2026 | – | −214K | −33.8% | Q1 2026 | |||||
|
Manufacturers Life Insurance Company, the
· Reduced
Change
−207K
Date
Q1 2026
|
Manufacturers Life Insurance Company, the | Reduced· Q1 2026 | – | −207K | – | Q1 2026 | |||||
|
Aigh Capital Management LLC
· New
Change
+200K
Date
Q1 2026
|
Aigh Capital Management LLC | New· Q1 2026 | – | +200K | – | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Shieh Han-Ping
· Director
Sell
−$328K
|
Shieh Han-Ping | Director | Sell | $328.00 | −1K | −$328K | 7K | −13.1% | Jun 18, 2026 | Jun 24, 2026 | |||||||||
|
Lin Kuan-Ming
· Director
Sell
−$320K
|
Lin Kuan-Ming | Director | Sell | $320.31 | −1K | −$320K | 8K | −11.8% | Jun 18, 2026 | Jun 24, 2026 | |||||||||
|
Lin Kuan-Ming
· Director
2 operations
−$610K
|
Lin Kuan-Ming | Director | 2 operations | $300.00–$310.01 | −2K | −$610K | 8K | −19.0% | Jun 17, 2026 | Jun 24, 2026 | |||||||||
|
Shieh Han-Ping
· Director
Sell
−$301K
|
Shieh Han-Ping | Director | Sell | $301.25 | −1K | −$301K | 8K | −11.6% | Jun 2, 2026 | Jun 24, 2026 | |||||||||
|
Duann Shii Tyng
· Director
Sell
−$368K
|
Duann Shii Tyng | Director | Sell | $245.00 | −2K | −$368K | 15K | – | May 6, 2026 | May 7, 2026 | |||||||||
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270 reporting institutions disclosed SIMO 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.