SEI Investments
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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
Q2 		$6.14M Sell
443,230
-135,931
-23% -$2.44M 0.01% 1386
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 $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Jane Street
Jane Street New York $1.21T AUM 78.12% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Goldman Sachs
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

SEI Investments's AMPX Position: Q2 2026 in Review

SEI Investments reduced its Amprius Technologies (AMPX) stake by 23% in Q2 2026, selling an estimated $2.44M and leaving 443,230 shares worth $6.14M. The position accounts for 0.01% of the portfolio, ranked #1386.

SEI Investments first reported a position in AMPX in Q3 2024 and has held it in 8 quarters since. The position peaked at $9.76M in Q1 2026. 261 funds tracked by Wall St. Rank hold AMPX as of Q2 2026.

  • SEI Investments held 443,230 shares of Amprius Technologies worth $6.14M as of Q2 2026.
  • SEI Investments sold 135,931 Amprius Technologies shares in Q2 2026, an estimated $2.44M.
  • Amprius Technologies made up 0.01% of SEI Investments's portfolio in Q2 2026, its #1386 holding.
  • SEI Investments first reported a position in Amprius Technologies in Q3 2024 and has held it in 8 quarters since.
  • SEI Investments's Amprius Technologies position peaked at $9.76M in Q1 2026.
  • 261 funds tracked by Wall St. Rank held Amprius Technologies as of Q2 2026.

Based on SEI Investments's 13F filing for Q2 2026, filed 14 Aug 2026.