SEI Investments
AMPX icon

SEI Investments’s Amprius Technologies AMPX Stock Holding History

SEI Investments’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 		$9.76M Buy
579,161
+147,375
+34% +$1.92M 0.01% 1159
2025
Q4 		$3.41M Buy
431,786
+353,066
+449% +$4.04M ﹤0.01% 1571
2025
Q3 		$828K Buy
78,720
+68,491
+670% +$539K ﹤0.01% 2040
2025
Q2 		$43.1K Hold
10,229
– – ﹤0.01% 2760
2025
Q1 		$27.4K Hold
10,229
– – ﹤0.01% 2723
2024
Q4 		$28.6K Sell
10,229
-55,854
-85% -$97.6K ﹤0.01% 2701
2024
Q3 		$73.4K Buy
+66,083
New +$72.8K ﹤0.01% 2600

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
Jane Street
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
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

SEI Investments's AMPX Position: Q1 2026 in Review

SEI Investments increased its Amprius Technologies (AMPX) stake by 34% in Q1 2026, buying an estimated $1.92M and bringing the position to 579,161 shares worth $9.76M. The position accounts for 0.01% of the portfolio, ranked #1159.

SEI Investments first reported a position in AMPX in Q3 2024 and has held it in 7 quarters since. 245 funds tracked by Wall St. Rank hold AMPX as of Q1 2026.

  • SEI Investments held 579,161 shares of Amprius Technologies worth $9.76M as of Q1 2026.
  • SEI Investments bought 147,375 Amprius Technologies shares in Q1 2026, an estimated $1.92M.
  • Amprius Technologies made up 0.01% of SEI Investments's portfolio in Q1 2026, its #1159 holding.
  • SEI Investments first reported a position in Amprius Technologies in Q3 2024 and has held it in 7 quarters since.
  • 245 funds tracked by Wall St. Rank held Amprius Technologies as of Q1 2026.

Based on SEI Investments's 13F filing for Q1 2026, filed 13 May 2026.