State of Wisconsin Investment Board
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State of Wisconsin Investment Board’s Amprius Technologies AMPX Stock Holding History

State of Wisconsin Investment Board’s Portfolio AMPX Stock Details AMPX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$193K Buy
+11,462
New +$149K ﹤0.01% 2349
2025
Q4 		– Sell
-31,944
Closed -$336K – 2375
2025
Q3 		$336K Buy
+31,944
New +$251K ﹤0.01% 2064
2025
Q2 		– Sell
-46,100
Closed -$124K – 2317
2025
Q1 		$124K Buy
+46,100
New +$136K ﹤0.01% 2156

Other funds holding AMPX

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Jane Street
Jane Street New York $777B AUM 61.18% 1-Year Est. Return
DCM
Driehaus Capital Management Chicago, Illinois $13.6B AUM 173.98% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return

State of Wisconsin Investment Board's AMPX Position: Q1 2026 in Review

State of Wisconsin Investment Board opened a new position in Amprius Technologies (AMPX) in Q1 2026: 11,462 shares worth $193K. The stake represents ﹤0.01% of the portfolio and ranks #2349 among its holdings. This is a return to the name: State of Wisconsin Investment Board previously reported a position in AMPX as recently as Q3 2025.

State of Wisconsin Investment Board first reported a position in AMPX in Q1 2025 and has held it in 3 quarters since. The position peaked at $336K in Q3 2025. 245 funds tracked by Wall St. Rank hold AMPX as of Q1 2026.

  • State of Wisconsin Investment Board held 11,462 shares of Amprius Technologies worth $193K as of Q1 2026.
  • Amprius Technologies was a new State of Wisconsin Investment Board position in Q1 2026.
  • Amprius Technologies made up ﹤0.01% of State of Wisconsin Investment Board's portfolio in Q1 2026, its #2349 holding.
  • State of Wisconsin Investment Board first reported a position in Amprius Technologies in Q1 2025 and has held it in 3 quarters since.
  • State of Wisconsin Investment Board's Amprius Technologies position peaked at $336K in Q3 2025.
  • 245 funds tracked by Wall St. Rank held Amprius Technologies as of Q1 2026.

Based on State of Wisconsin Investment Board's 13F filing for Q1 2026, filed 15 May 2026.