William Blair Investment Management
AR icon

William Blair Investment Management’s Antero Resources AR Stock Holding History

William Blair Investment Management’s Portfolio AR Stock Details AR Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$10.8M Sell
308,622
-76,153
-20% -$2.8M 0.03% 305
2026
Q1 		$16.3M Sell
384,775
-241,645
-39% -$8.82M 0.05% 272
2025
Q4 		$21.6M Buy
626,420
+125,136
+25% +$4.24M 0.06% 263
2025
Q3 		$16.8M Sell
501,284
-391,641
-44% -$13.1M 0.04% 294
2025
Q2 		$36M Sell
892,925
-66,126
-7% -$2.5M 0.1% 165
2025
Q1 		$38.8M Sell
959,051
-475,096
-33% -$18.2M 0.11% 167
2024
Q4 		$50.3M Buy
1,434,147
+59,439
+4% +$1.8M 0.12% 154
2024
Q3 		$39.4M Buy
1,374,708
+48,843
+4% +$1.38M 0.1% 170
2024
Q2 		$43.3M Buy
1,325,865
+453,854
+52% +$14.8M 0.11% 151
2024
Q1 		$25.3M Buy
+872,011
New +$21.1M 0.07% 276

Other funds holding AR

BlackRock
BlackRock New York $6.73T AUM 46.02% 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
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
SG
Sourcerock Group Denver, Colorado $1.92B AUM 45.54% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

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

William Blair Investment Management reduced its Antero Resources (AR) stake by 20% in Q2 2026, selling an estimated $2.8M and leaving 308,622 shares worth $10.8M. The position accounts for 0.03% of the portfolio, ranked #305.

William Blair Investment Management first reported a position in AR in Q1 2024 and has held it in 10 quarters since. The position peaked at $50.3M in Q4 2024. 625 funds tracked by Wall St. Rank hold AR as of Q2 2026.

  • William Blair Investment Management held 308,622 shares of Antero Resources worth $10.8M as of Q2 2026.
  • William Blair Investment Management sold 76,153 Antero Resources shares in Q2 2026, an estimated $2.8M.
  • Antero Resources made up 0.03% of William Blair Investment Management's portfolio in Q2 2026, its #305 holding.
  • William Blair Investment Management first reported a position in Antero Resources in Q1 2024 and has held it in 10 quarters since.
  • William Blair Investment Management's Antero Resources position peaked at $50.3M in Q4 2024.
  • 625 funds tracked by Wall St. Rank held Antero Resources as of Q2 2026.

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