MASSACHUSETTS FINANCIAL SERVICES CO /MA/
Position in AMPX — Amprius Technologies, Inc.
CIK 912938
Boston, MA
Position in AMPX
as of Jun 30, 2026
· filed Aug 3, 2026
Position Value
$7,016,874
-$27,120,579 QoQ
Shares Held
506,268
-75.0% QoQ
Ownership
0.347%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#43
of 259 holders
Holding Since
Mar 2026
2 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in AMPX Over Time
Shares Held
Position Value (USD)
Position in Electrical Equipment & Parts
Industrials · as of Jun 30, 2026MASSACHUSETTS FINANCIAL SERVICES CO /MA/ holds $1,465,086,023 across 11 Electrical Equipment & Parts names. AMPX ranks #8 (0.5% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | HUBB |
Hubbell Inc
|
1,546,097 | $808,917,948 | |
| 2 | VRT |
Vertiv Holdings Co
|
655,032 | $219,317,810 | |
| 3 | NVT |
nVent Electric plc
|
1,052,447 | $178,505,532 | |
| 4 | AEIS |
Advanced Energy Industries Inc
|
375,982 | $140,192,406 | |
| 5 | BE |
Bloom Energy Corp
|
195,219 | $59,092,789 | |
| 6 | HAYW |
Hayward Holdings, Inc.
|
1,933,716 | $33,472,623 | |
| 7 | FCEL |
Fuelcell Energy Inc
|
327,068 | $11,777,718 | |
| 8 | AMPX |
Amprius Technologies, Inc.
This page
|
506,268 | $7,016,874 |
All Filings in AMPX
Export CSV
2 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $7,016,874 | 506,268 | Shares | Sole | 2026-08-03 | |
| 2026-03-31 | $34,137,453 | 2,024,760 | Shares | Sole | 2026-05-14 | |
| No filing history on record for this holder in this stock. | ||||||