William Blair Investment Management
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William Blair Investment Management’s Extreme Networks EXTR Stock Holding History

William Blair Investment Management’s Portfolio EXTR Stock Details EXTR Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-1,479,635
Closed -$24.6M – 432
2025
Q4 		$24.6M Buy
1,479,635
+132,727
+10% +$2.44M 0.07% 244
2025
Q3 		$27.8M Sell
1,346,908
-551,699
-29% -$11M 0.07% 235
2025
Q2 		$34.1M Sell
1,898,607
-150,975
-7% -$2.22M 0.09% 178
2025
Q1 		$27.1M Sell
2,049,582
-91,805
-4% -$1.44M 0.08% 238
2024
Q4 		$35.8M Buy
2,141,387
+52,621
+3% +$851K 0.09% 204
2024
Q3 		$31.4M Buy
2,088,766
+199,620
+11% +$2.83M 0.08% 224
2024
Q2 		$25.4M Buy
+1,889,146
New +$21.7M 0.07% 263

Other funds holding EXTR

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
PCMI
Paradigm Capital Management Inc Albany, New York $3.67B AUM 121.12% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $225B AUM 49.49% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
TI
Trigran Investments Northbrook, Illinois $545M AUM 56.2% 1-Year Est. Return

William Blair Investment Management's EXTR Position: Q1 2026 in Review

William Blair Investment Management sold out of Extreme Networks (EXTR) in Q1 2026, closing a stake of 1,479,635 shares — an estimated $24.6M sold.

William Blair Investment Management first reported a position in EXTR in Q2 2024 and held it in 7 quarters. The position peaked at $35.8M in Q4 2024. 301 funds tracked by Wall St. Rank hold EXTR as of Q1 2026.

  • William Blair Investment Management reported no remaining Extreme Networks position as of Q1 2026 after selling out during the quarter.
  • William Blair Investment Management sold 1,479,635 Extreme Networks shares in Q1 2026, an estimated $24.6M.
  • William Blair Investment Management first reported a position in Extreme Networks in Q2 2024 and held it in 7 quarters.
  • William Blair Investment Management's Extreme Networks position peaked at $35.8M in Q4 2024.
  • 301 funds tracked by Wall St. Rank held Extreme Networks as of Q1 2026.

Based on William Blair Investment Management's 13F filing for Q1 2026, filed 8 May 2026.