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
Q1 		$21M Buy
1,247,600
+352,600
+39% +$4.6M ﹤0.01% 1746
2025
Q4 		$7.06M Buy
895,000
+235,800
+36% +$2.7M ﹤0.01% 2750
2025
Q3 		$6.93M Buy
659,200
+626,200
+1,898% +$4.93M ﹤0.01% 2933
2025
Q2 		$139K Buy
33,000
+5,000
+18% +$14.1K ﹤0.01% 8798
2025
Q1 		$75K Buy
+28,000
New +$82.6K ﹤0.01% 8907
2023
Q2 		– Sell
-118,300
Closed -$1.03M – 8615
2023
Q1 		$1.03M Sell
118,300
-4,100
-3% -$25.9K ﹤0.01% 4940
2022
Q4 		$971K Buy
+122,400
New +$1.12M ﹤0.01% 5025

Other funds holding AMPX

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
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 $2.9T AUM 29.55% 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
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $298B AUM 21.96% 1-Year Est. Return

Jane Street's AMPX Position: Q1 2026 in Review

Jane Street increased its Amprius Technologies (AMPX) stake by 1,849% in Q1 2026, buying an estimated $51.5M and bringing the position to 4,160,656 shares worth $70.1M. The position accounts for 0.01% of the portfolio, ranked #831.

Jane Street first reported a position in AMPX in Q3 2022 and has held it in 12 quarters since. 245 funds tracked by Wall St. Rank hold AMPX as of Q1 2026.

  • Jane Street held 4,160,656 shares of Amprius Technologies worth $70.1M as of Q1 2026.
  • Jane Street bought 3,947,231 Amprius Technologies shares in Q1 2026, an estimated $51.5M.
  • Amprius Technologies made up 0.01% of Jane Street's portfolio in Q1 2026, its #831 holding.
  • Jane Street first reported a position in Amprius Technologies in Q3 2022 and has held it in 12 quarters since.
  • 245 funds tracked by Wall St. Rank held Amprius Technologies as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.