William Blair Investment Management
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William Blair Investment Management’s Rush Street Interactive RSI Stock Holding History

William Blair Investment Management’s Portfolio RSI Stock Details RSI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$48.6M Sell
1,635,734
-695,313
-30% -$18.3M 0.15% 155
2026
Q1 		$50.7M Sell
2,331,047
-226,731
-9% -$4.34M 0.17% 135
2025
Q4 		$49.7M Buy
2,557,778
+378,002
+17% +$6.99M 0.14% 140
2025
Q3 		$44.6M Sell
2,179,776
-495,825
-19% -$9.35M 0.12% 148
2025
Q2 		$39.9M Buy
2,675,601
+121,992
+5% +$1.51M 0.11% 156
2025
Q1 		$27.4M Buy
2,553,609
+976,711
+62% +$12.8M 0.08% 234
2024
Q4 		$21.6M Buy
+1,576,898
New +$19.2M 0.05% 303
2022
Q4 		– Sell
-1,467,868
Closed -$5.4M – 415
2022
Q3 		$5.4M Buy
1,467,868
+74,896
+5% +$396K 0.02% 323
2022
Q2 		$6.5M Buy
1,392,972
+115,170
+9% +$686K 0.02% 319
2022
Q1 		$9.29M Sell
1,277,802
-16,610
-1% -$167K 0.03% 322
2021
Q4 		$21.4M Sell
1,294,412
-121,669
-9% -$2.29M 0.06% 288
2021
Q3 		$27.2M Sell
1,416,081
-632,371
-31% -$8.65M 0.08% 280
2021
Q2 		$25.1M Buy
2,048,452
+32,430
+2% +$436K 0.08% 199
2021
Q1 		$32.9M Buy
2,016,022
+110,734
+6% +$2.13M 0.11% 172
2020
Q4 		$41.2M Buy
1,905,288
+550,929
+41% +$8.25M 0.14% 146
2020
Q3 		$17.3M Buy
+1,354,359
New +$15.4M 0.07% 200

Other funds holding RSI

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
DSCM
Divisadero Street Capital Management Miami, Florida $4.41B AUM 90.53% 1-Year Est. Return
Ameriprise
Ameriprise Minneapolis, Minnesota $495B AUM 43.24% 1-Year Est. Return
HRCM
Hood River Capital Management Palm Beach Gardens, Florida $13.8B AUM 163.97% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
DCM
Driehaus Capital Management Chicago, Illinois $17.3B AUM 211.34% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

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

William Blair Investment Management reduced its Rush Street Interactive (RSI) stake by 30% in Q2 2026, selling an estimated $18.3M and leaving 1,635,734 shares worth $48.6M. The position accounts for 0.15% of the portfolio, ranked #155.

William Blair Investment Management first reported a position in RSI in Q3 2020 and has held it in 16 quarters since. The position peaked at $50.7M in Q1 2026. 304 funds tracked by Wall St. Rank hold RSI as of Q2 2026.

  • William Blair Investment Management held 1,635,734 shares of Rush Street Interactive worth $48.6M as of Q2 2026.
  • William Blair Investment Management sold 695,313 Rush Street Interactive shares in Q2 2026, an estimated $18.3M.
  • Rush Street Interactive made up 0.15% of William Blair Investment Management's portfolio in Q2 2026, its #155 holding.
  • William Blair Investment Management first reported a position in Rush Street Interactive in Q3 2020 and has held it in 16 quarters since.
  • William Blair Investment Management's Rush Street Interactive position peaked at $50.7M in Q1 2026.
  • 304 funds tracked by Wall St. Rank held Rush Street Interactive as of Q2 2026.

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