MASSACHUSETTS FINANCIAL SERVICES CO /MA/
Position in MPWR — Monolithic Power Systems, Inc.
CIK 912938
Boston, MA
Position in MPWR
as of Mar 31, 2026
· filed May 14, 2026
Position Value
$620,770,232
+$103,493,363 QoQ
Shares Held
567,769
-0.5% QoQ
Ownership
1.16%
of shares outstanding
% of Portfolio
0.22%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
25 quarters on record
Voting authority
Sole 77%
Shared 18%
None 5%
Common Shares in MPWR Over Time
Shares Held
Position Value (USD)
Position in Semiconductors
Technology · as of Mar 31, 2026MASSACHUSETTS FINANCIAL SERVICES CO /MA/ holds $23,224,478,133 across 21 Semiconductors names. MPWR ranks #7 (2.7% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | NVDA |
Nvidia Corp
|
65,275,558 | $11,384,057,313 | |
| 2 | TSM |
Taiwan Semiconductor Manufacturing Co Ltd
|
9,677,855 | $3,270,631,094 | |
| 3 | AVGO |
Broadcom Inc.
|
8,980,922 | $2,779,685,163 | |
| 4 | ADI |
Analog Devices Inc
|
6,216,638 | $1,977,761,209 | |
| 5 | NXPI |
NXP Semiconductors N.V.
|
7,574,965 | $1,491,207,606 | |
| 6 | TXN |
Texas Instruments Inc
|
5,320,294 | $1,032,881,874 | |
| 7 | MPWR |
Monolithic Power Systems, Inc.
This page
|
567,769 | $620,770,232 | |
| 8 | MTSI |
MACOM Technology Solutions Holdings, Inc.
|
828,448 | $183,973,444 |
All Filings in MPWR
Export CSV
25 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $620,770,232 | 567,769 | Shares | Defined | 2026-05-14 | |
| 2025-12-31 | $517,276,869 | 570,719 | Shares | Sole | 2026-01-22 | |
| 2025-09-30 | $512,416,252 | 556,587 | Shares | Sole | 2025-10-29 | |
| 2025-06-30 | $355,003,073 | 485,388 | Shares | Sole | 2025-08-08 | |
| 2025-03-31 | $265,370,423 | 457,551 | Shares | Sole | 2025-05-02 | |
| 2024-12-31 | $288,927,107 | 488,300 | Shares | Sole | 2025-02-12 | |
| 2024-09-30 | $626,896,976 | 678,093 | Shares | Sole | 2024-11-12 | |
| 2024-06-30 | $773,509,828 | 941,376 | Shares | Sole | 2024-08-09 | |
| 2024-03-31 | $667,286,471 | 985,041 | Shares | Sole | 2024-05-14 | |
| 2023-12-31 | $666,219,110 | 1,056,183 | Shares | Sole | 2024-02-08 | |
| 2023-09-30 | $486,522,036 | 1,053,078 | Shares | Sole | 2023-11-08 | |
| 2023-06-30 | $589,504,915 | 1,091,211 | Shares | Sole | 2023-08-09 | |
| 2023-03-31 | $566,064,187 | 1,130,907 | Shares | Sole | 2023-05-10 | |
| 2022-12-31 | $396,026,576 | 1,119,953 | Shares | Sole | 2023-02-13 | |
| 2022-09-30 | $464,008,377 | 1,276,853 | Shares | Sole | 2022-11-09 | |
| 2022-06-30 | $488,951,277 | 1,273,178 | Shares | Sole | 2022-08-09 | |
| 2022-03-31 | $548,766,429 | 1,129,893 | Shares | Sole | 2022-05-11 | |
| 2021-12-31 | $564,690,181 | 1,144,650 | Shares | Sole | 2022-02-10 | |
| 2021-09-30 | $591,477,781 | 1,220,347 | Shares | Sole | 2021-11-10 | |
| 2021-06-30 | $460,006,745 | 1,231,776 | Shares | Sole | 2021-08-13 | |
| 2021-03-31 | $440,972,792 | 1,248,472 | Shares | Sole | 2021-05-13 | |
| 2020-12-31 | $448,769,816 | 1,225,377 | Shares | Sole | 2021-05-12 | |
| 2020-09-30 | $351,204,139 | 1,256,050 | Shares | Sole | 2020-11-12 | |
| 2020-06-30 | $289,354,011 | 1,220,903 | Shares | Sole | 2020-11-20 | |
| 2020-03-31 | $177,315,019 | 1,058,850 | Shares | Sole | 2020-11-20 | |
| No filing history on record for this holder in this stock. | ||||||