Janus Henderson Group’s Amprius Technologies AMPX Stock Holding History

Janus Henderson Group’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	$889K	Buy	52,803 +13,750	+35%	+$179K	﹤0.01%	1749
2025 Q4	$308K	Hold	39,053	–	–	﹤0.01%	2199
2025 Q3	$411K	Buy	+39,053	New	+$307K	﹤0.01%	2078
2023 Q3	–	Sell	-642,453	Closed	-$4.61M	–	2561
2023 Q2	$4.61M	Sell	642,453 -382,127	-37%	-$3.28M	﹤0.01%	884
2023 Q1	$8.92M	Sell	1,024,580 -4,847	-0.5%	-$30.6K	0.01%	726
2022 Q4	$8.16M	Sell	1,029,427 -1,003,231	-49%	-$9.19M	0.01%	764
2022 Q3	$18.8M	Buy	+2,032,658	New	+$20.9M	0.01%	690

Other funds holding AMPX

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

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

DCM

Driehaus Capital Management Chicago, Illinois $13.6B AUM 173.98% 1-Year Est. Return

Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return

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

Janus Henderson Group's AMPX Position: Q1 2026 in Review

Janus Henderson Group increased its Amprius Technologies (AMPX) stake by 35% in Q1 2026, buying an estimated $179K and bringing the position to 52,803 shares worth $889K. The position accounts for ﹤0.01% of the portfolio, ranked #1749.

Janus Henderson Group first reported a position in AMPX in Q3 2022 and has held it in 7 quarters since. The position peaked at $18.8M in Q3 2022. 245 funds tracked by Wall St. Rank hold AMPX as of Q1 2026.

Janus Henderson Group held 52,803 shares of Amprius Technologies worth $889K as of Q1 2026.
Janus Henderson Group bought 13,750 Amprius Technologies shares in Q1 2026, an estimated $179K.
Amprius Technologies made up ﹤0.01% of Janus Henderson Group's portfolio in Q1 2026, its #1749 holding.
Janus Henderson Group first reported a position in Amprius Technologies in Q3 2022 and has held it in 7 quarters since.
Janus Henderson Group's Amprius Technologies position peaked at $18.8M in Q3 2022.
245 funds tracked by Wall St. Rank held Amprius Technologies as of Q1 2026.

Based on Janus Henderson Group's 13F filing for Q1 2026, filed 15 May 2026.