William Blair & Company
HOLX

William Blair & Company’s Hologic HOLX Stock Holding History

William Blair & Company’s Portfolio HOLX Stock Details HOLX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-20,073
Closed -$1.5M – 1968
2025
Q4 		$1.5M Sell
20,073
-37,732
-65% -$2.76M ﹤0.01% 823
2025
Q3 		$3.9M Buy
57,805
+2,245
+4% +$149K 0.01% 580
2025
Q2 		$3.62M Sell
55,560
-16,259
-23% -$975K 0.01% 581
2025
Q1 		$4.44M Sell
71,819
-69,468
-49% -$4.6M 0.01% 518
2024
Q4 		$10.2M Sell
141,287
-106,111
-43% -$8.29M 0.03% 337
2024
Q3 		$20.2M Sell
247,398
-9,671
-4% -$774K 0.06% 232
2024
Q2 		$19.1M Sell
257,069
-43,740
-15% -$3.28M 0.06% 224
2024
Q1 		$23.5M Sell
300,809
-7,706
-2% -$573K 0.07% 194
2023
Q4 		$22M Sell
308,515
-16,569
-5% -$1.15M 0.08% 193
2023
Q3 		$22.6M Sell
325,084
-43,051
-12% -$3.25M 0.09% 184
2023
Q2 		$29.8M Sell
368,135
-9,842
-3% -$804K 0.11% 165
2023
Q1 		$30.5M Sell
377,977
-10,725
-3% -$863K 0.12% 154
2022
Q4 		$29.1M Sell
388,702
-94,301
-20% -$6.72M 0.13% 152
2022
Q3 		$31.2M Sell
483,003
-139,101
-22% -$9.64M 0.14% 139
2022
Q2 		$43.1M Buy
622,104
+25,451
+4% +$1.89M 0.19% 117
2022
Q1 		$45.8M Sell
596,653
-27,803
-4% -$2M 0.16% 139
2021
Q4 		$47.8M Sell
624,456
-30,516
-5% -$2.24M 0.15% 138
2021
Q3 		$48.3M Buy
654,972
+90,460
+16% +$6.78M 0.16% 137
2021
Q2 		$37.7M Sell
564,512
-62,748
-10% -$4.19M 0.13% 157
2021
Q1 		$46.7M Buy
627,260
+36,943
+6% +$2.8M 0.18% 132
2020
Q4 		$43M Sell
590,317
-7,852
-1% -$554K 0.16% 136
2020
Q3 		$39.8M Buy
598,169
+181,536
+44% +$11.5M 0.17% 125
2020
Q2 		$23.7M Buy
416,633
+406,293
+3,929% +$19.9M 0.11% 162
2020
Q1 		$363K Sell
10,340
-79
-0.8% -$3.76K ﹤0.01% 962
2019
Q4 		$544K Buy
10,419
+1,238
+13% +$61.6K ﹤0.01% 953
2019
Q3 		$464K Sell
9,181
-6,948
-43% -$342K ﹤0.01% 976
2019
Q2 		$775K Sell
16,129
-866
-5% -$40K ﹤0.01% 835
2019
Q1 		$823K Buy
16,995
+795
+5% +$35.8K 0.01% 794
2018
Q4 		$666K Buy
16,200
+863
+6% +$35.4K ﹤0.01% 819
2018
Q3 		$629K Sell
15,337
-147
-0.9% -$5.94K ﹤0.01% 879
2018
Q2 		$615K Sell
15,484
-1,350
-8% -$51.9K ﹤0.01% 877
2018
Q1 		$629K Sell
16,834
-11,845
-41% -$479K ﹤0.01% 847
2017
Q4 		$1.23M Buy
28,679
+12,205
+74% +$487K 0.01% 692
2017
Q3 		$604K Buy
16,474
+6,044
+58% +$244K ﹤0.01% 872
2017
Q2 		$473K Sell
10,430
-2,500
-19% -$110K ﹤0.01% 1001
2017
Q1 		$527K Buy
12,930
+2,650
+26% +$108K ﹤0.01% 888
2016
Q4 		$412K Buy
+10,280
New +$397K ﹤0.01% 897
2015
Q4 		– Sell
-18,250
Closed -$714K – 1247
2015
Q3 		$714K Sell
18,250
-25,930
-59% -$1.03M 0.01% 857
2015
Q2 		$1.68M Buy
44,180
+20,755
+89% +$726K ﹤0.01% 1400
2015
Q1 		$773K Buy
23,425
+2,005
+9% +$61.5K ﹤0.01% 1615
2014
Q4 		$573K Buy
21,420
+6,970
+48% +$180K ﹤0.01% 1651
2014
Q3 		$351K Buy
14,450
+100
+0.7% +$2.52K ﹤0.01% 1793
2014
Q2 		$363K Sell
14,350
-6,225
-30% -$145K ﹤0.01% 1756
2014
Q1 		$442K Buy
20,575
+7,500
+57% +$162K ﹤0.01% 1653
2013
Q4 		$291K Sell
13,075
-34,974
-73% -$771K ﹤0.01% 1753
2013
Q3 		$992K Sell
48,049
-2,861,271
-98% -$60.9M ﹤0.01% 1333
2013
Q2 		$56.1M Buy
+2,909,320
New +$60.8M 0.11% 278

Other funds holding HOLX

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
HI
HBK Investments Dallas, Texas $10.2B AUM 67.73% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Fidelity International
Fidelity International Hamilton, Bermuda $139B AUM 29.06% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Millennium Management
Millennium Management New York $276B AUM 44.8% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return
Balyasny Asset Management
Balyasny Asset Management Chicago, Illinois $80.2B AUM 51.53% 1-Year Est. Return

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

William Blair & Company sold out of Hologic (HOLX) in Q1 2026, closing a stake of 20,073 shares — an estimated $1.5M sold.

William Blair & Company first reported a position in HOLX in Q2 2013 and held it in 47 quarters. The position peaked at $56.1M in Q2 2013. 704 funds tracked by Wall St. Rank hold HOLX as of Q1 2026.

  • William Blair & Company reported no remaining Hologic position as of Q1 2026 after selling out during the quarter.
  • William Blair & Company sold 20,073 Hologic shares in Q1 2026, an estimated $1.5M.
  • William Blair & Company first reported a position in Hologic in Q2 2013 and held it in 47 quarters.
  • William Blair & Company's Hologic position peaked at $56.1M in Q2 2013.
  • 704 funds tracked by Wall St. Rank held Hologic as of Q1 2026.

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