Jane Street
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Jane Street’s Amprius Technologies AMPX Stock Holding History

Jane Street’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
Q2 		$64M Buy
4,621,100
+3,455,100
+296% +$61.9M 0.01% 1222
2026
Q1 		$19.7M Buy
1,166,000
+945,400
+429% +$12.3M ﹤0.01% 1796
2025
Q4 		$1.74M Buy
220,600
+111,400
+102% +$1.27M ﹤0.01% 5069
2025
Q3 		$1.15M Buy
+109,200
New +$859K ﹤0.01% 6012

Other funds holding AMPX

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
JAM
Jupiter Asset Management London, United Kingdom $20.2B AUM 29.18% 1-Year Est. Return
LP
LMR Partners London, United Kingdom $26.8B AUM 68.38% 1-Year Est. Return

Jane Street's AMPX Position: Q2 2026 in Review

Jane Street reduced its Amprius Technologies (AMPX) stake by 18% in Q2 2026, selling an estimated $13.6M and leaving 3,401,071 shares worth $47.1M. The position accounts for ﹤0.01% of the portfolio, ranked #1479.

Jane Street first reported a position in AMPX in Q3 2022 and has held it in 13 quarters since. The position peaked at $70.1M in Q1 2026. 262 funds tracked by Wall St. Rank hold AMPX as of Q2 2026.

  • Jane Street held 3,401,071 shares of Amprius Technologies worth $47.1M as of Q2 2026.
  • Jane Street sold 759,585 Amprius Technologies shares in Q2 2026, an estimated $13.6M.
  • Amprius Technologies made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #1479 holding.
  • Jane Street first reported a position in Amprius Technologies in Q3 2022 and has held it in 13 quarters since.
  • Jane Street's Amprius Technologies position peaked at $70.1M in Q1 2026.
  • 262 funds tracked by Wall St. Rank held Amprius Technologies as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.