Ken Griffin’s Amprius Technologies AMPX Stock Holding History

Ken Griffin’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	$24.3M	Buy	1,443,800 +697,500	+93%	+$9.09M	﹤0.01%	2093
2025 Q4	$5.89M	Buy	746,300 +41,200	+6%	+$471K	﹤0.01%	4032
2025 Q3	$7.42M	Buy	705,100 +671,000	+1,968%	+$5.28M	﹤0.01%	3698
2025 Q2	$144K	Sell	34,100 -27,000	-44%	-$75.9K	﹤0.01%	10998
2025 Q1	$164K	Buy	61,100 +16,900	+38%	+$49.9K	﹤0.01%	10733
2024 Q4	$124K	Buy	44,200 +31,100	+237%	+$54.3K	﹤0.01%	11140
2024 Q3	$14.5K	Buy	13,100 +6,100	+87%	+$6.72K	﹤0.01%	13017
2024 Q2	$8.89K	Sell	7,000 -60,300	-90%	-$98.4K	﹤0.01%	13163
2024 Q1	$178K	Sell	67,300 -6,500	-9%	-$24.1K	﹤0.01%	10507
2023 Q4	$390K	Buy	73,800 +3,500	+5%	+$13.2K	﹤0.01%	8620
2023 Q3	$333K	Buy	+70,300	New	+$414K	﹤0.01%	8956
2023 Q2	–	Sell	-159,600	Closed	-$1.39M	–	14280
2023 Q1	$1.39M	Buy	159,600 +1,800	+1%	+$11.4K	﹤0.01%	6063
2022 Q4	$1.25M	Buy	+157,800	New	+$1.45M	﹤0.01%	6379

Other funds holding AMPX

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Jane Street New York $777B AUM 61.18% 1-Year Est. Return

DCM

Driehaus Capital Management Chicago, Illinois $17.3B AUM 211.34% 1-Year Est. Return

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

Morgan Stanley New York $1.89T AUM 35.08% 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

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

Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return

Ken Griffin's AMPX Position: Q1 2026 in Review

Ken Griffin increased its Amprius Technologies (AMPX) stake by 216% in Q1 2026, buying an estimated $12.8M and bringing the position to 1,438,660 shares worth $24.3M. The position accounts for ﹤0.01% of the portfolio, ranked #2099.

Ken Griffin first reported a position in AMPX in Q3 2022 and has held it in 8 quarters since. The position peaked at $26.4M in Q3 2025. 245 funds tracked by Wall St. Rank hold AMPX as of Q1 2026.

Ken Griffin held 1,438,660 shares of Amprius Technologies worth $24.3M as of Q1 2026.
Ken Griffin bought 983,806 Amprius Technologies shares in Q1 2026, an estimated $12.8M.
Amprius Technologies made up ﹤0.01% of Ken Griffin's portfolio in Q1 2026, its #2099 holding.
Ken Griffin first reported a position in Amprius Technologies in Q3 2022 and has held it in 8 quarters since.
Ken Griffin's Amprius Technologies position peaked at $26.4M in Q3 2025.
245 funds tracked by Wall St. Rank held Amprius Technologies as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.