STATE OF WISCONSIN INVESTMENT BOARD
Position in AMPX — Amprius Technologies, Inc.
CIK 854157
MADISON, WI
Position in AMPX
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$410,103
+$216,854 QoQ
Shares Held
29,589
+158.1% QoQ
Ownership
0.020%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#155
of 259 holders
Holding Since
Mar 2025
4 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, 2026STATE OF WISCONSIN INVESTMENT BOARD holds $199,451,050 across 19 Electrical Equipment & Parts names. AMPX ranks #17 (0.2% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VRT |
Vertiv Holdings Co
|
205,411 | $68,775,711 | |
| 2 | BE |
Bloom Energy Corp
|
140,275 | $42,461,242 | |
| 3 | NVT |
nVent Electric plc
|
126,768 | $21,501,120 | |
| 4 | HUBB |
Hubbell Inc
|
28,251 | $14,780,923 | |
| 5 | AYI |
Acuity Inc. (De)
|
38,332 | $14,438,131 | |
| 6 | POWL |
Powell Industries Inc
|
39,548 | $11,324,965 | |
| 7 | ENS |
EnerSys
|
34,721 | $8,118,464 | |
| 8 | FPS |
Forgent Power Solutions, Inc.
|
117,391 | $6,557,461 |
All Filings in AMPX
Export CSV
4 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $410,103 | 29,589 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $193,249 | 11,462 | Shares | Sole | 2026-05-15 | |
| 2025-09-30 | $336,050 | 31,944 | Shares | Sole | 2025-11-14 | |
| 2025-03-31 | $123,548 | 46,100 | Shares | Sole | 2025-05-15 | |
| No filing history on record for this holder in this stock. | ||||||