William Blair & Company
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William Blair & Company’s GSK GSK Stock Holding History

William Blair & Company’s Portfolio GSK Stock Details GSK Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$833K Sell
15,093
-917
-6% -$49.7K ﹤0.01% 995
2025
Q4 		$785K Sell
16,010
-710
-4% -$33.1K ﹤0.01% 998
2025
Q3 		$722K Buy
16,720
+3,976
+31% +$155K ﹤0.01% 1002
2025
Q2 		$489K Sell
12,744
-4,696
-27% -$179K ﹤0.01% 1088
2025
Q1 		$676K Sell
17,440
-3,291
-16% -$120K ﹤0.01% 997
2024
Q4 		$701K Sell
20,731
-2,559
-11% -$92.1K ﹤0.01% 996
2024
Q3 		$952K Sell
23,290
-252
-1% -$10.3K ﹤0.01% 918
2024
Q2 		$906K Buy
23,542
+49
+0.2% +$2.06K ﹤0.01% 912
2024
Q1 		$1.01M Buy
23,493
+3,044
+15% +$126K ﹤0.01% 864
2023
Q4 		$758K Sell
20,449
-3,159
-13% -$113K ﹤0.01% 948
2023
Q3 		$856K Sell
23,608
-14,130
-37% -$502K ﹤0.01% 889
2023
Q2 		$1.34M Buy
37,738
+388
+1% +$13.9K ﹤0.01% 757
2023
Q1 		$1.33M Buy
37,350
+1,871
+5% +$65.5K 0.01% 757
2022
Q4 		$1.25M Sell
35,479
-2,313
-6% -$77K 0.01% 759
2022
Q3 		$1.11M Buy
+37,792
New +$1.43M 0.01% 784
2022
Q2 		– Sell
-29,754
Closed -$1.62M – 1892
2022
Q1 		$1.62M Buy
29,754
+876
+3% +$47.6K 0.01% 755
2021
Q4 		$1.59M Buy
28,878
+1,787
+7% +$93K 0.01% 795
2021
Q3 		$1.29M Sell
27,091
-18,332
-40% -$921K ﹤0.01% 825
2021
Q2 		$2.26M Sell
45,423
-80,416
-64% -$3.86M 0.01% 677
2021
Q1 		$5.61M Sell
125,839
-7,802
-6% -$354K 0.02% 430
2020
Q4 		$6.15M Buy
133,641
+1,390
+1% +$63.8K 0.02% 396
2020
Q3 		$6.22M Buy
132,251
+23,027
+21% +$1.15M 0.03% 352
2020
Q2 		$5.57M Buy
109,224
+10,060
+10% +$516K 0.03% 360
2020
Q1 		$4.7M Sell
99,164
-6,560
-6% -$350K 0.03% 348
2019
Q4 		$6.21M Sell
105,724
-4,368
-4% -$243K 0.03% 349
2019
Q3 		$5.87M Sell
110,092
-12,545
-10% -$645K 0.03% 347
2019
Q2 		$6.13M Buy
122,637
+409
+0.3% +$20.5K 0.04% 336
2019
Q1 		$6.38M Buy
122,228
+5,660
+5% +$283K 0.04% 326
2018
Q4 		$5.57M Buy
116,568
+22,746
+24% +$1.12M 0.04% 319
2018
Q3 		$4.71M Buy
93,822
+12,492
+15% +$635K 0.03% 382
2018
Q2 		$4.1M Buy
81,330
+1,147
+1% +$57.8K 0.03% 398
2018
Q1 		$3.92M Buy
80,183
+12,020
+18% +$560K 0.03% 406
2017
Q4 		$3.02M Sell
68,163
-92,571
-58% -$4.28M 0.02% 472
2017
Q3 		$8.16M Sell
160,734
-48,437
-23% -$2.46M 0.06% 258
2017
Q2 		$11.3M Buy
209,171
+31,721
+18% +$1.69M 0.08% 224
2017
Q1 		$9.34M Buy
177,450
+70,740
+66% +$3.59M 0.08% 235
2016
Q4 		$5.14M Sell
106,710
-13,898
-12% -$687K 0.05% 296
2016
Q3 		$6.5M Buy
120,608
+77,693
+181% +$4.26M 0.06% 266
2016
Q2 		$2.33M Buy
42,915
+8,449
+25% +$445K 0.02% 441
2016
Q1 		$1.75M Sell
34,466
-12,096
-26% -$602K 0.02% 486
2015
Q4 		$2.35M Sell
46,562
-636
-1% -$32.4K 0.02% 431
2015
Q3 		$2.27M Sell
47,198
-1,484
-3% -$77.3K 0.02% 499
2015
Q2 		$2.53M Buy
48,682
+24
+0% +$1.35K ﹤0.01% 1261
2015
Q1 		$2.81M Buy
48,658
+11,236
+30% +$644K ﹤0.01% 1201
2014
Q4 		$2M Buy
37,422
+1,988
+6% +$111K ﹤0.01% 1288
2014
Q3 		$2.04M Sell
35,434
-3,963
-10% -$243K ﹤0.01% 1250
2014
Q2 		$2.63M Buy
39,397
+860
+2% +$58.2K ﹤0.01% 1171
2014
Q1 		$2.57M Buy
38,537
+2,245
+6% +$152K ﹤0.01% 1136
2013
Q4 		$2.42M Sell
36,292
-33,538
-48% -$2.17M ﹤0.01% 1118
2013
Q3 		$4.38M Buy
69,830
+2,107
+3% +$136K 0.01% 930
2013
Q2 		$4.23M Buy
+67,723
New +$4.3M 0.01% 911

Other funds holding GSK

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Dodge & Cox
Dodge & Cox San Francisco, California $182B AUM 14.68% 1-Year Est. Return
Fisher Asset Management
Fisher Asset Management Camas, Washington $336B AUM 34.66% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
JEST
JTC Employer Solutions Trustee St Helier, Jersey $1.25B AUM 41.83% 1-Year Est. Return
Royal Bank of Canada
Royal Bank of Canada Toronto, Ontario, Canada $570B AUM 27.57% 1-Year Est. Return

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

William Blair & Company reduced its GSK (GSK) stake by 5.7% in Q1 2026, selling an estimated $49.7K and leaving 15,093 shares worth $833K. The position accounts for ﹤0.01% of the portfolio, ranked #995.

William Blair & Company first reported a position in GSK in Q2 2013 and has held it in 51 quarters since. The position peaked at $11.3M in Q2 2017. 1,034 funds tracked by Wall St. Rank hold GSK as of Q1 2026.

  • William Blair & Company held 15,093 shares of GSK worth $833K as of Q1 2026.
  • William Blair & Company sold 917 GSK shares in Q1 2026, an estimated $49.7K.
  • GSK made up ﹤0.01% of William Blair & Company's portfolio in Q1 2026, its #995 holding.
  • William Blair & Company first reported a position in GSK in Q2 2013 and has held it in 51 quarters since.
  • William Blair & Company's GSK position peaked at $11.3M in Q2 2017.
  • 1,034 funds tracked by Wall St. Rank held GSK as of Q1 2026.

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