William Blair Investment Management
EXAS

William Blair Investment Management’s Exact Sciences EXAS Stock Holding History

William Blair Investment Management’s Portfolio EXAS Stock Details EXAS Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q4 		– Sell
-2,555,051
Closed -$140M – 428
2025
Q3 		$140M Buy
2,555,051
+534,881
+26% +$26.7M 0.36% 79
2025
Q2 		$107M Sell
2,020,170
-228,868
-10% -$11.6M 0.28% 92
2025
Q1 		$97.4M Sell
2,249,038
-1,195,473
-35% -$60.5M 0.27% 102
2024
Q4 		$194M Sell
3,444,511
-840,442
-20% -$52.3M 0.47% 63
2024
Q3 		$292M Buy
4,284,953
+405,758
+10% +$22.9M 0.72% 28
2024
Q2 		$164M Buy
+3,879,195
New +$213M 0.43% 74
2021
Q3 		– Sell
-180,333
Closed -$22.4M – 460
2021
Q2 		$22.4M Buy
180,333
+28,923
+19% +$3.45M 0.07% 211
2021
Q1 		$20M Sell
151,410
-4,609
-3% -$631K 0.06% 217
2020
Q4 		$20.7M Sell
156,019
-2,030,978
-93% -$246M 0.07% 208
2020
Q3 		$223M Buy
2,186,997
+407,772
+23% +$35.2M 0.87% 30
2020
Q2 		$155M Buy
+1,779,225
New +$142M 0.63% 59
2019
Q3 		– Sell
-984,426
Closed -$116M – 367
2019
Q2 		$116M Sell
984,426
-433,441
-31% -$43.7M 0.49% 70
2019
Q1 		$123M Sell
1,417,867
-652,565
-32% -$55.5M 0.52% 62
2018
Q4 		$131M Sell
2,070,432
-263,613
-11% -$18.1M 0.65% 47
2018
Q3 		$184M Buy
2,334,045
+520,579
+29% +$33.9M 0.64% 50
2018
Q2 		$108M Sell
1,813,466
-164,153
-8% -$8.83M 0.4% 80
2018
Q1 		$79.8M Buy
1,977,619
+396,146
+25% +$19.3M 0.3% 101
2017
Q4 		$83.1M Sell
1,581,473
-984,534
-38% -$52.6M 0.32% 99
2017
Q3 		$121M Sell
2,566,007
-564,689
-18% -$22.7M 0.43% 74
2017
Q2 		$111M Sell
3,130,696
-969,443
-24% -$29.9M 0.4% 77
2017
Q1 		$96.8M Sell
4,100,139
-1,791,188
-30% -$35.5M 0.37% 90
2016
Q4 		$78.7M Buy
5,891,327
+939,270
+19% +$15.2M 0.31% 110
2016
Q3 		$92M Sell
4,952,057
-98,206
-2% -$1.73M 0.35% 91
2016
Q2 		$61.9M Buy
5,050,263
+4,803,363
+1,945% +$36.2M 0.24% 125
2016
Q1 		$1.66M Sell
246,900
-5,519,380
-96% -$35.3M 0.01% 390
2015
Q4 		$53.2M Buy
5,766,280
+1,043,546
+22% +$9.7M 0.22% 133
2015
Q3 		$85M Buy
+4,722,734
New +$108M 0.17% 171

Other funds holding EXAS

Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
HI
HBK Investments Dallas, Texas $9.85B AUM 55.6% 1-Year Est. Return
PCM
Pentwater Capital Management Naples, Florida $19.3B AUM 58.13% 1-Year Est. Return
FCM
Farallon Capital Management San Francisco, California $17.5B AUM 50.95% 1-Year Est. Return
DKCM
Davidson Kempner Capital Management New York $7.33B AUM 56.47% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Balyasny Asset Management
Balyasny Asset Management Chicago, Illinois $77.1B AUM 42.89% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
Norges Bank
Norges Bank Oslo, Norway $935B AUM

William Blair Investment Management's EXAS Position: Q4 2025 in Review

William Blair Investment Management sold out of Exact Sciences (EXAS) in Q4 2025, closing a stake of 2,555,051 shares — an estimated $140M sold.

William Blair Investment Management first reported a position in EXAS in Q3 2015 and held it in 27 quarters. The position peaked at $292M in Q3 2024. 711 funds tracked by Wall St. Rank hold EXAS as of Q4 2025.

  • William Blair Investment Management reported no remaining Exact Sciences position as of Q4 2025 after selling out during the quarter.
  • William Blair Investment Management sold 2,555,051 Exact Sciences shares in Q4 2025, an estimated $140M.
  • William Blair Investment Management first reported a position in Exact Sciences in Q3 2015 and held it in 27 quarters.
  • William Blair Investment Management's Exact Sciences position peaked at $292M in Q3 2024.
  • 711 funds tracked by Wall St. Rank held Exact Sciences as of Q4 2025.

Based on William Blair Investment Management's 13F filing for Q4 2025, filed 9 Feb 2026.