William Blair Investment Management
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William Blair Investment Management’s Aehr Test Systems AEHR Stock Holding History

William Blair Investment Management’s Portfolio AEHR Stock Details AEHR Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		– Sell
-513,293
Closed -$19M – 407
2026
Q1 		$19M Buy
513,293
+17,621
+4% +$564K 0.06% 259
2025
Q4 		$10M Sell
495,672
-398,389
-45% -$9.64M 0.03% 316
2025
Q3 		$26.9M Buy
+894,061
New +$19.4M 0.07% 242

Other funds holding AEHR

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
D.E. Shaw & Co
D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
Jane Street
Jane Street New York $1.21T AUM 78.12% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

William Blair Investment Management's AEHR Position: Q2 2026 in Review

William Blair Investment Management sold out of Aehr Test Systems (AEHR) in Q2 2026, closing a stake of 513,293 shares — an estimated $19M sold.

William Blair Investment Management first reported a position in AEHR in Q3 2025 and held it in 3 quarters. The position peaked at $26.9M in Q3 2025. 262 funds tracked by Wall St. Rank hold AEHR as of Q2 2026.

  • William Blair Investment Management reported no remaining Aehr Test Systems position as of Q2 2026 after selling out during the quarter.
  • William Blair Investment Management sold 513,293 Aehr Test Systems shares in Q2 2026, an estimated $19M.
  • William Blair Investment Management first reported a position in Aehr Test Systems in Q3 2025 and held it in 3 quarters.
  • William Blair Investment Management's Aehr Test Systems position peaked at $26.9M in Q3 2025.
  • 262 funds tracked by Wall St. Rank held Aehr Test Systems as of Q2 2026.

Based on William Blair Investment Management's 13F filing for Q2 2026, filed 12 Aug 2026.