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 		$70.1M Buy
4,160,656
+3,947,231
+1,849% +$51.5M 0.01% 831
2025
Q4 		$1.68M Sell
213,425
-463,239
-68% -$5.3M ﹤0.01% 5140
2025
Q3 		$7.12M Buy
676,664
+654,309
+2,927% +$5.15M ﹤0.01% 2892
2025
Q2 		$94.1K Sell
22,355
-83,628
-79% -$235K ﹤0.01% 8976
2025
Q1 		$284K Sell
105,983
-152,635
-59% -$450K ﹤0.01% 7902
2024
Q4 		$724K Buy
+258,618
New +$452K ﹤0.01% 5998
2024
Q3 		– Sell
-22,643
Closed -$28.8K – 9519
2024
Q2 		$28.8K Buy
22,643
+210
+0.9% +$343 ﹤0.01% 9010
2024
Q1 		$59.4K Sell
22,433
-5,478
-20% -$20.3K ﹤0.01% 8702
2023
Q4 		$148K Buy
+27,911
New +$105K ﹤0.01% 8402
2023
Q3 		– Sell
-36,811
Closed -$264K – 8564
2023
Q2 		$264K Buy
36,811
+10,873
+42% +$93.4K ﹤0.01% 7314
2023
Q1 		$226K Buy
+25,938
New +$164K ﹤0.01% 7657
2022
Q4 		– Sell
-51,436
Closed -$471K – 9072
2022
Q3 		$474K Buy
+51,436
New +$529K ﹤0.01% 6784

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.