Hudson Bay Capital Management
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Hudson Bay Capital Management’s Amprius Technologies AMPX Stock Holding History

Hudson Bay Capital Management’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 		$744K Buy
+53,674
New +$962K ﹤0.01% 963
2026
Q1 		– Sell
-1,100,000
Closed -$8.68M – 1386
2025
Q4 		$8.68M Buy
+1,100,000
New +$12.6M 0.03% 371

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 $3.38T AUM 44.17% 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

Hudson Bay Capital Management's AMPX Position: Q2 2026 in Review

Hudson Bay Capital Management opened a new position in Amprius Technologies (AMPX) in Q2 2026: 53,674 shares worth $744K. The stake represents ﹤0.01% of the portfolio and ranks #963 among its holdings. This is a return to the name: Hudson Bay Capital Management previously reported a position in AMPX as recently as Q4 2025.

Hudson Bay Capital Management first reported a position in AMPX in Q4 2025 and has held it in 2 quarters since. The position peaked at $8.68M in Q4 2025. 261 funds tracked by Wall St. Rank hold AMPX as of Q2 2026.

  • Hudson Bay Capital Management held 53,674 shares of Amprius Technologies worth $744K as of Q2 2026.
  • Amprius Technologies was a new Hudson Bay Capital Management position in Q2 2026.
  • Amprius Technologies made up ﹤0.01% of Hudson Bay Capital Management's portfolio in Q2 2026, its #963 holding.
  • Hudson Bay Capital Management first reported a position in Amprius Technologies in Q4 2025 and has held it in 2 quarters since.
  • Hudson Bay Capital Management's Amprius Technologies position peaked at $8.68M in Q4 2025.
  • 261 funds tracked by Wall St. Rank held Amprius Technologies as of Q2 2026.

Based on Hudson Bay Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.