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Oberweis Asset Management’s Amprius Technologies AMPX Stock Holding History

Oberweis Asset 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 		$8.82M Buy
636,200
+51,200
+9% +$917K 0.18% 139
2026
Q1 		$9.86M Buy
+585,000
New +$7.63M 0.29% 120

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

Oberweis Asset Management's AMPX Position: Q2 2026 in Review

Oberweis Asset Management increased its Amprius Technologies (AMPX) stake by 8.8% in Q2 2026, buying an estimated $917K and bringing the position to 636,200 shares worth $8.82M. The position accounts for 0.18% of the portfolio, ranked #139.

Oberweis Asset Management first reported a position in AMPX in Q1 2026 and has held it in 2 quarters since. The position peaked at $9.86M in Q1 2026. 262 funds tracked by Wall St. Rank hold AMPX as of Q2 2026.

  • Oberweis Asset Management held 636,200 shares of Amprius Technologies worth $8.82M as of Q2 2026.
  • Oberweis Asset Management bought 51,200 Amprius Technologies shares in Q2 2026, an estimated $917K.
  • Amprius Technologies made up 0.18% of Oberweis Asset Management's portfolio in Q2 2026, its #139 holding.
  • Oberweis Asset Management first reported a position in Amprius Technologies in Q1 2026 and has held it in 2 quarters since.
  • Oberweis Asset Management's Amprius Technologies position peaked at $9.86M in Q1 2026.
  • 262 funds tracked by Wall St. Rank held Amprius Technologies as of Q2 2026.

Based on Oberweis Asset Management's 13F filing for Q2 2026, filed 14 Aug 2026.