William Blair & Company
ICLR icon

William Blair & Company’s Icon ICLR Stock Holding History

William Blair & Company’s Portfolio ICLR Stock Details ICLR Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$973K Sell
8,797
-5,949
-40% -$813K ﹤0.01% 952
2025
Q4 		$2.69M Sell
14,746
-9,264
-39% -$1.65M 0.01% 669
2025
Q3 		$4.2M Buy
24,010
+836
+4% +$140K 0.01% 566
2025
Q2 		$3.37M Sell
23,174
-1,204
-5% -$171K 0.01% 595
2025
Q1 		$4.27M Sell
24,378
-3,696
-13% -$717K 0.01% 525
2024
Q4 		$5.89M Sell
28,074
-95,442
-77% -$22.3M 0.02% 453
2024
Q3 		$35.5M Buy
123,516
+48,198
+64% +$15.2M 0.1% 159
2024
Q2 		$23.6M Buy
75,318
+2,766
+4% +$867K 0.07% 202
2024
Q1 		$24.4M Buy
72,552
+16,952
+30% +$5M 0.08% 188
2023
Q4 		$15.7M Buy
55,600
+3,019
+6% +$781K 0.05% 241
2023
Q3 		$12.9M Buy
52,581
+20,616
+64% +$5.2M 0.05% 269
2023
Q2 		$8M Buy
31,965
+1,808
+6% +$384K 0.03% 352
2023
Q1 		$6.44M Sell
30,157
-655
-2% -$146K 0.03% 385
2022
Q4 		$5.99M Sell
30,812
-3,550
-10% -$704K 0.03% 390
2022
Q3 		$6.32M Sell
34,362
-206
-0.6% -$44.8K 0.03% 368
2022
Q2 		$7.49M Sell
34,568
-749
-2% -$168K 0.03% 338
2022
Q1 		$8.59M Sell
35,317
-3,095
-8% -$776K 0.03% 352
2021
Q4 		$11.9M Buy
38,412
+10,129
+36% +$2.83M 0.04% 317
2021
Q3 		$7.41M Buy
28,283
+21,968
+348% +$5.34M 0.03% 379
2021
Q2 		$1.3M Buy
6,315
+3,919
+164% +$846K ﹤0.01% 830
2021
Q1 		$471K Buy
2,396
+18
+0.8% +$3.55K ﹤0.01% 1144
2020
Q4 		$464K Buy
2,378
+58
+3% +$11.3K ﹤0.01% 1104
2020
Q3 		$443K Buy
2,320
+80
+4% +$14.7K ﹤0.01% 1009
2020
Q2 		$377K Buy
2,240
+280
+14% +$44.1K ﹤0.01% 1014
2020
Q1 		$267K Buy
+1,960
New +$314K ﹤0.01% 1058
2018
Q4 		– Sell
-5,089
Closed -$782K – 1727
2018
Q3 		$782K Buy
5,089
+13
+0.3% +$1.86K ﹤0.01% 817
2018
Q2 		$673K Sell
5,076
-6,740
-57% -$840K ﹤0.01% 845
2018
Q1 		$1.4M Sell
11,816
-1,908
-14% -$219K 0.01% 626
2017
Q4 		$1.54M Sell
13,724
-2,626
-16% -$303K 0.01% 629
2017
Q3 		$1.86M Buy
16,350
+1,554
+11% +$165K 0.01% 571
2017
Q2 		$1.45M Buy
+14,796
New +$1.31M 0.01% 651
2016
Q1 		– Sell
-2,863
Closed -$222K – 1212
2015
Q4 		$222K Sell
2,863
-55
-2% -$3.93K ﹤0.01% 1052
2015
Q3 		$207K Sell
2,918
-1,216,786
-100% -$91.6M ﹤0.01% 1271
2015
Q2 		$82.1M Sell
1,219,704
-18,466
-1% -$1.25M 0.12% 224
2015
Q1 		$87.3M Buy
1,238,170
+163,863
+15% +$10.2M 0.13% 218
2014
Q4 		$54.8M Buy
1,074,307
+869,388
+424% +$46.9M 0.09% 307
2014
Q3 		$11.7M Buy
+204,919
New +$10.5M 0.02% 782

Other funds holding ICLR

Artisan Partners
Artisan Partners Milwaukee, Wisconsin $62.3B AUM 26.25% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
Harris Associates
Harris Associates Chicago, Illinois $75B AUM 11.27% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
Principal Financial Group
Principal Financial Group Des Moines, Iowa $187B AUM 18.48% 1-Year Est. Return
BWA
Brave Warrior Advisors New York $4.04B AUM 1.15% 1-Year Est. Return
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $298B AUM 21.96% 1-Year Est. Return
AllianceBernstein
AllianceBernstein Nashville, Tennessee $309B AUM 23.92% 1-Year Est. Return
SHCM
Sachem Head Capital Management New York $4.15B AUM 48.05% 1-Year Est. Return

William Blair & Company's ICLR Position: Q1 2026 in Review

William Blair & Company reduced its Icon (ICLR) stake by 40% in Q1 2026, selling an estimated $813K and leaving 8,797 shares worth $973K. The position accounts for ﹤0.01% of the portfolio, ranked #952.

William Blair & Company first reported a position in ICLR in Q3 2014 and has held it in 37 quarters since. The position peaked at $87.3M in Q1 2015. 415 funds tracked by Wall St. Rank hold ICLR as of Q1 2026.

  • William Blair & Company held 8,797 shares of Icon worth $973K as of Q1 2026.
  • William Blair & Company sold 5,949 Icon shares in Q1 2026, an estimated $813K.
  • Icon made up ﹤0.01% of William Blair & Company's portfolio in Q1 2026, its #952 holding.
  • William Blair & Company first reported a position in Icon in Q3 2014 and has held it in 37 quarters since.
  • William Blair & Company's Icon position peaked at $87.3M in Q1 2015.
  • 415 funds tracked by Wall St. Rank held Icon as of Q1 2026.

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