WHITTIER TRUST CO
BankPosition in MPWR — Monolithic Power Systems, Inc.
CIK 1137881
SOUTH PASADENA, CA
Position in MPWR
as of Jun 30, 2026
· filed Jul 28, 2026
Position Value
$57,923,647
+$11,992,014 QoQ
Shares Held
41,902
-0.3% QoQ
Ownership
0.085%
of shares outstanding
% of Portfolio
0.73%
of 13F equity value
Holder Rank
#122
of 1,236 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in MPWR Over Time
Shares Held
Position Value (USD)
Position in Semiconductors
Technology · as of Jun 30, 2026WHITTIER TRUST CO holds $1,131,718,756 across 23 Semiconductors names. MPWR ranks #5 (5.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | NVDA |
Nvidia Corp
|
2,757,409 | $551,729,966 | |
| 2 | AVGO |
Broadcom Inc.
|
706,685 | $266,950,258 | |
| 3 | MU |
Micron Technology Inc
|
97,000 | $111,966,129 | |
| 4 | ARM |
Arm Holdings PLC /Uk
|
217,837 | $77,238,464 | |
| 5 | MPWR |
Monolithic Power Systems, Inc.
This page
|
41,902 | $57,923,647 | |
| 6 | INTC |
Intel Corp
|
261,532 | $36,517,712 | |
| 7 | AMD |
Advanced Micro Devices Inc
|
19,868 | $11,541,519 | |
| 8 | TXN |
Texas Instruments Inc
|
33,980 | $10,128,418 |
All Filings in MPWR
Export CSV
26 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $57,923,647 | 41,902 | Shares | Sole | 2026-07-28 | |
| 2026-03-31 | $45,931,633 | 42,010 | Shares | Sole | 2026-04-28 | |
| 2025-12-31 | $40,108,242 | 44,252 | Shares | Sole | 2026-01-26 | |
| 2025-09-30 | $40,693,208 | 44,201 | Shares | Sole | 2025-10-31 | |
| 2025-06-30 | $31,831,850 | 43,523 | Shares | Sole | 2025-07-30 | |
| 2025-03-31 | $24,641,029 | 42,486 | Shares | Sole | 2025-05-02 | |
| 2024-12-31 | $24,574,483 | 41,532 | Shares | Sole | 2025-02-11 | |
| 2024-09-30 | $37,248,105 | 40,290 | Shares | Sole | 2024-10-21 | |
| 2024-06-30 | $31,950,204 | 38,884 | Shares | Sole | 2024-07-29 | |
| 2024-03-31 | $25,126,184 | 37,091 | Shares | Sole | 2024-05-02 | |
| 2023-12-31 | $22,594,539 | 35,820 | Shares | Sole | 2024-01-11 | |
| 2023-09-30 | $17,919,594 | 38,787 | Shares | Sole | 2023-10-27 | |
| 2023-06-30 | $20,496,865 | 37,941 | Shares | Sole | 2023-07-24 | |
| 2023-03-31 | $21,322,503 | 42,599 | Shares | Sole | 2023-04-21 | |
| 2022-12-31 | $13,823,321 | 39,092 | Shares | Sole | 2023-01-25 | |
| 2022-09-30 | $17,697,942 | 48,701 | Shares | Sole | 2022-10-21 | |
| 2022-06-30 | $17,938,507 | 46,710 | Shares | Sole | 2022-07-28 | |
| 2022-03-31 | $22,440,357 | 46,204 | Shares | Sole | 2022-04-29 | |
| 2021-12-31 | $21,865,865 | 44,323 | Shares | Sole | 2022-01-19 | |
| 2021-09-30 | $23,946,584 | 49,407 | Shares | Sole | 2021-11-01 | |
| 2021-06-30 | $18,647,105 | 49,932 | Shares | Sole | 2021-07-29 | |
| 2021-03-31 | $16,645,373 | 47,126 | Shares | Sole | 2021-04-26 | |
| 2020-12-31 | $16,071,270 | 43,883 | Shares | Sole | 2021-01-29 | |
| 2020-09-30 | $16,044,860 | 57,383 | Shares | Sole | 2020-10-30 | |
| 2020-06-30 | $13,476,768 | 56,864 | Shares | Sole | 2020-07-10 | |
| 2020-03-31 | $9,670,647 | 57,749 | Shares | Sole | 2020-04-27 | |
| No filing history on record for this holder in this stock. | ||||||