William Blair Investment Management’s Icon ICLR Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $285K | Buy |
2,577
+63
| +3% | +$8.61K | ﹤0.01% | 399 |
|
|
2025
Q4 | $458K | Buy |
2,514
+321
| +15% | +$57.2K | ﹤0.01% | 378 |
|
|
2025
Q3 | $384K | Sell |
2,193
-71
| -3% | -$11.9K | ﹤0.01% | 382 |
|
|
2025
Q2 | $329K | Sell |
2,264
-36
| -2% | -$5.11K | ﹤0.01% | 395 |
|
|
2025
Q1 | $402K | Sell |
2,300
-6
| -0.3% | -$1.16K | ﹤0.01% | 393 |
|
|
2024
Q4 | $484K | Sell |
2,306
-1,257,039
| -100% | -$294M | ﹤0.01% | 389 |
|
|
2024
Q3 | $362M | Buy |
1,259,345
+100,808
| +9% | +$31.8M | 0.89% | 15 |
|
|
2024
Q2 | $363M | Buy |
1,158,537
+10,567
| +0.9% | +$3.31M | 0.95% | 14 |
|
|
2024
Q1 | $386M | Buy |
1,147,970
+3,577
| +0.3% | +$1.05M | 1% | 14 |
|
|
2023
Q4 | $324M | Buy |
1,144,393
+101,228
| +10% | +$26.2M | 0.94% | 17 |
|
|
2023
Q3 | $257M | Sell |
1,043,165
-16,491
| -2% | -$4.16M | 0.85% | 20 |
|
|
2023
Q2 | $265M | Sell |
1,059,656
-287,967
| -21% | -$61.1M | 0.85% | 21 |
|
|
2023
Q1 | $288M | Sell |
1,347,623
-136,678
| -9% | -$30.4M | 1% | 14 |
|
|
2022
Q4 | $288M | Sell |
1,484,301
-31,937
| -2% | -$6.33M | 1.1% | 10 |
|
|
2022
Q3 | $279M | Sell |
1,516,238
-4,260
| -0.3% | -$927K | 1.1% | 13 |
|
|
2022
Q2 | $329M | Buy |
1,520,498
+408,736
| +37% | +$91.7M | 1.22% | 10 |
|
|
2022
Q1 | $270M | Buy |
1,111,762
+208,955
| +23% | +$52.4M | 0.81% | 28 |
|
|
2021
Q4 | $280M | Sell |
902,807
-10,913
| -1% | -$3.05M | 0.76% | 34 |
|
|
2021
Q3 | $239M | Buy |
913,720
+280,653
| +44% | +$68.2M | 0.68% | 41 |
|
|
2021
Q2 | $131M | Buy |
633,067
+185,252
| +41% | +$40M | 0.41% | 94 |
|
|
2021
Q1 | $87.9M | Sell |
447,815
-31,472
| -7% | -$6.21M | 0.28% | 106 |
|
|
2020
Q4 | $93.5M | Sell |
479,287
-30,197
| -6% | -$5.9M | 0.31% | 103 |
|
|
2020
Q3 | $97.4M | Sell |
509,484
-25,011
| -5% | -$4.6M | 0.38% | 94 |
|
|
2020
Q2 | $90M | Buy |
534,495
+45,591
| +9% | +$7.18M | 0.37% | 101 |
|
|
2020
Q1 | $66.5M | Sell |
488,904
-11,480
| -2% | -$1.84M | 0.32% | 99 |
|
|
2019
Q4 | $86.2M | Sell |
500,384
-13,225
| -3% | -$2.04M | 0.34% | 95 |
|
|
2019
Q3 | $75.7M | Sell |
513,609
-12,104
| -2% | -$1.86M | 0.32% | 91 |
|
|
2019
Q2 | $80.9M | Sell |
525,713
-29,574
| -5% | -$4.15M | 0.34% | 91 |
|
|
2019
Q1 | $75.8M | Sell |
555,287
-20,696
| -4% | -$2.82M | 0.32% | 92 |
|
|
2018
Q4 | $74.4M | Sell |
575,983
-15,034
| -3% | -$2.08M | 0.37% | 89 |
|
|
2018
Q3 | $90.9M | Sell |
591,017
-7,126
| -1% | -$1.02M | 0.31% | 100 |
|
|
2018
Q2 | $79.3M | Sell |
598,143
-37,301
| -6% | -$4.65M | 0.3% | 109 |
|
|
2018
Q1 | $75.1M | Buy |
635,444
+90,688
| +17% | +$10.4M | 0.29% | 108 |
|
|
2017
Q4 | $61.1M | Sell |
544,756
-11,540
| -2% | -$1.33M | 0.24% | 127 |
|
|
2017
Q3 | $63.4M | Sell |
556,296
-8,650
| -2% | -$919K | 0.23% | 129 |
|
|
2017
Q2 | $55.2M | Sell |
564,946
-75,846
| -12% | -$6.71M | 0.2% | 130 |
|
|
2017
Q1 | $51.1M | Sell |
640,792
-363,457
| -36% | -$29.8M | 0.19% | 140 |
|
|
2016
Q4 | $75.5M | Sell |
1,004,249
-246,706
| -20% | -$19.2M | 0.3% | 115 |
|
|
2016
Q3 | $96.8M | Sell |
1,250,955
-320,272
| -20% | -$24.1M | 0.37% | 86 |
|
|
2016
Q2 | $110M | Sell |
1,571,227
-43,366
| -3% | -$2.98M | 0.43% | 79 |
|
|
2016
Q1 | $121M | Sell |
1,614,593
-11,114
| -0.7% | -$779K | 0.48% | 77 |
|
|
2015
Q4 | $126M | Buy |
1,625,707
+329,231
| +25% | +$23.5M | 0.51% | 67 |
|
|
2015
Q3 | $92M | Buy |
+1,296,476
| New | +$97.6M | 0.19% | 153 |
|
Other funds holding ICLR
BWA
SHCM
William Blair Investment Management's ICLR Position: Q1 2026 in Review
William Blair Investment Management increased its Icon (ICLR) stake by 2.5% in Q1 2026, buying an estimated $8.61K and bringing the position to 2,577 shares worth $285K. The position accounts for ﹤0.01% of the portfolio, ranked #399.
William Blair Investment Management first reported a position in ICLR in Q3 2015 and has held it in 43 quarters since. The position peaked at $386M in Q1 2024. 415 funds tracked by Wall St. Rank hold ICLR as of Q1 2026.
- William Blair Investment Management held 2,577 shares of Icon worth $285K as of Q1 2026.
- William Blair Investment Management bought 63 Icon shares in Q1 2026, an estimated $8.61K.
- Icon made up ﹤0.01% of William Blair Investment Management's portfolio in Q1 2026, its #399 holding.
- William Blair Investment Management first reported a position in Icon in Q3 2015 and has held it in 43 quarters since.
- William Blair Investment Management's Icon position peaked at $386M in Q1 2024.
- 415 funds tracked by Wall St. Rank held Icon as of Q1 2026.
Based on William Blair Investment Management's 13F filing for Q1 2026, filed 8 May 2026.