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	$18.2M	Buy	1,312,700 +65,100	+5%	+$1.17M	﹤0.01%	2235
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 New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return

UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

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

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.