MASSACHUSETTS FINANCIAL SERVICES CO /MA/
Position in AMKR — Amkor Technology, Inc.
CIK 912938
Boston, MA
Position in AMKR
as of Jun 30, 2026
· filed Aug 3, 2026
Position Value
$31,135,496
+$14,618,808 QoQ
Shares Held
361,075
-1.6% QoQ
Ownership
0.146%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
#49
of 642 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority
Sole 95%
Shared 5%
None 0%
Common Shares in AMKR Over Time
Shares Held
Position Value (USD)
Position in Semiconductor Equipment & Materials
Technology · as of Jun 30, 2026MASSACHUSETTS FINANCIAL SERVICES CO /MA/ holds $6,850,708,177 across 12 Semiconductor Equipment & Materials names. AMKR ranks #8 (0.5% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | KLAC |
Kla Corp
|
14,668,801 | $4,425,723,945 | |
| 2 | AMAT |
Applied Materials Inc /De
|
1,522,200 | $1,100,550,600 | |
| 3 | LRCX |
Lam Research Corp
|
1,218,684 | $528,092,334 | |
| 4 | TER |
Teradyne, Inc
|
678,033 | $328,059,482 | |
| 5 | ENTG |
Entegris Inc
|
1,161,575 | $208,920,877 | |
| 6 | Q |
Qnity Electronics, Inc.
|
886,031 | $144,697,721 | |
| 7 | FORM |
Formfactor Inc
|
381,320 | $60,984,506 | |
| 8 | AMKR |
Amkor Technology, Inc.
This page
|
361,075 | $31,135,496 |
All Filings in AMKR
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26 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $31,135,496 | 361,075 | Shares | Defined | 2026-08-03 | |
| 2026-03-31 | $16,516,688 | 366,793 | Shares | Defined | 2026-05-14 | |
| 2025-12-31 | $15,094,822 | 382,341 | Shares | Sole | 2026-01-22 | |
| 2025-09-30 | $10,924,656 | 384,671 | Shares | Sole | 2025-10-29 | |
| 2025-06-30 | $6,655,782 | 317,093 | Shares | Sole | 2025-08-08 | |
| 2025-03-31 | $4,455,167 | 246,687 | Shares | Sole | 2025-05-02 | |
| 2024-12-31 | $4,703,119 | 183,072 | Shares | Sole | 2025-02-12 | |
| 2024-09-30 | $4,926,324 | 160,991 | Shares | Sole | 2024-11-12 | |
| 2024-06-30 | $6,098,767 | 152,393 | Shares | Sole | 2024-08-09 | |
| 2024-03-31 | $4,461,403 | 138,381 | Shares | Sole | 2024-05-14 | |
| 2023-12-31 | $4,506,388 | 135,449 | Shares | Sole | 2024-02-08 | |
| 2023-09-30 | $3,012,037 | 133,276 | Shares | Sole | 2023-11-08 | |
| 2023-06-30 | $3,939,703 | 132,427 | Shares | Sole | 2023-08-09 | |
| 2023-03-31 | $3,278,780 | 126,010 | Shares | Sole | 2023-05-10 | |
| 2022-12-31 | $3,080,159 | 128,447 | Shares | Sole | 2023-02-13 | |
| 2022-09-30 | $4,401,440 | 258,149 | Shares | Sole | 2022-11-09 | |
| 2022-06-30 | $3,996,877 | 235,804 | Shares | Sole | 2022-08-09 | |
| 2022-03-31 | $3,823,241 | 176,024 | Shares | Sole | 2022-05-11 | |
| 2021-12-31 | $4,285,100 | 172,856 | Shares | Sole | 2022-02-10 | |
| 2021-09-30 | $4,396,589 | 176,216 | Shares | Sole | 2021-11-10 | |
| 2021-06-30 | $5,326,436 | 225,029 | Shares | Sole | 2021-08-13 | |
| 2021-03-31 | $5,390,397 | 227,347 | Shares | Sole | 2021-05-13 | |
| 2020-12-31 | $4,091,400 | 271,313 | Shares | Sole | 2021-05-12 | |
| 2020-09-30 | $3,069,046 | 274,022 | Shares | Sole | 2020-11-12 | |
| 2020-06-30 | $3,505,407 | 284,761 | Shares | Sole | 2020-11-20 | |
| 2020-03-31 | $2,683,522 | 344,483 | Shares | Sole | 2020-11-20 | |
| No filing history on record for this holder in this stock. | ||||||