William Blair & Company
ACGL icon

William Blair & Company’s Arch Capital ACGL Stock Holding History

William Blair & Company’s Portfolio ACGL Stock Details ACGL Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$695K Buy
7,160
+3,288
+85% +$310K ﹤0.01% 1110
2026
Q1 		$372K Sell
3,872
-648
-14% -$62K ﹤0.01% 1250
2025
Q4 		$434K Buy
4,520
+1,286
+40% +$118K ﹤0.01% 1191
2025
Q3 		$293K Sell
3,234
-123
-4% -$11K ﹤0.01% 1313
2025
Q2 		$306K Sell
3,357
-1,306
-28% -$121K ﹤0.01% 1254
2025
Q1 		$449K Sell
4,663
-727
-13% -$67.1K ﹤0.01% 1116
2024
Q4 		$498K Sell
5,390
-20
-0.4% -$2.02K ﹤0.01% 1093
2024
Q3 		$605K Buy
5,410
+896
+20% +$93.2K ﹤0.01% 1061
2024
Q2 		$455K Buy
4,514
+100
+2% +$9.72K ﹤0.01% 1122
2024
Q1 		$408K Buy
4,414
+286
+7% +$24.2K ﹤0.01% 1140
2023
Q4 		$307K Buy
4,128
+143
+4% +$11.7K ﹤0.01% 1237
2023
Q3 		$318K Buy
3,985
+61
+2% +$4.75K ﹤0.01% 1202
2023
Q2 		$294K Buy
3,924
+101
+3% +$7.3K ﹤0.01% 1255
2023
Q1 		$259K Buy
3,823
+20
+0.5% +$1.31K ﹤0.01% 1292
2022
Q4 		$239K Buy
+3,803
New +$212K ﹤0.01% 1310
2022
Q2 		– Sell
-4,458
Closed -$216K – 1859
2022
Q1 		$216K Sell
4,458
-1,246
-22% -$57.9K ﹤0.01% 1489
2021
Q4 		$254K Sell
5,704
-5
-0.1% -$212 ﹤0.01% 1479
2021
Q3 		$218K Buy
5,709
+38
+0.7% +$1.5K ﹤0.01% 1461
2021
Q2 		$221K Sell
5,671
-37
-0.6% -$1.47K ﹤0.01% 1465
2021
Q1 		$219K Buy
+5,708
New +$203K ﹤0.01% 1449
2015
Q3 		– Sell
-72,327
Closed -$1.61M – 1404
2015
Q2 		$1.61M Buy
72,327
+7,515
+12% +$159K ﹤0.01% 1419
2015
Q1 		$1.33M Buy
+64,812
New +$1.3M ﹤0.01% 1465

Other funds holding ACGL

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Artisan Partners
Artisan Partners Milwaukee, Wisconsin $63.1B AUM 35.51% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
BAMCO Inc
BAMCO Inc New York $66.6B AUM 7.35% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
WCM Investment Management
WCM Investment Management Laguna Beach, California $55.2B AUM 57.07% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

William Blair & Company's ACGL Position: Q2 2026 in Review

William Blair & Company increased its Arch Capital (ACGL) stake by 85% in Q2 2026, buying an estimated $310K and bringing the position to 7,160 shares worth $695K. The position accounts for ﹤0.01% of the portfolio, ranked #1110.

William Blair & Company first reported a position in ACGL in Q1 2015 and has held it in 22 quarters since. The position peaked at $1.61M in Q2 2015. 906 funds tracked by Wall St. Rank hold ACGL as of Q2 2026.

  • William Blair & Company held 7,160 shares of Arch Capital worth $695K as of Q2 2026.
  • William Blair & Company bought 3,288 Arch Capital shares in Q2 2026, an estimated $310K.
  • Arch Capital made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #1110 holding.
  • William Blair & Company first reported a position in Arch Capital in Q1 2015 and has held it in 22 quarters since.
  • William Blair & Company's Arch Capital position peaked at $1.61M in Q2 2015.
  • 906 funds tracked by Wall St. Rank held Arch Capital as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.