William Blair & Company’s Pfizer PFE Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2026
Q1
$38.5M Sell
1,370,097
-12,572
-0.9% -$335K 0.11% 167
2025
Q4
$34.4M Sell
1,382,669
-38,344
-3% -$967K 0.09% 170
2025
Q3
$36.2M Sell
1,421,013
-437,039
-24% -$10.8M 0.1% 165
2025
Q2
$45M Sell
1,858,052
-432,146
-19% -$10.1M 0.13% 149
2025
Q1
$58M Buy
2,290,198
+20,179
+0.9% +$528K 0.18% 126
2024
Q4
$60.2M Sell
2,270,019
-192,304
-8% -$5.22M 0.18% 117
2024
Q3
$71.3M Buy
2,462,323
+509,013
+26% +$14.8M 0.21% 106
2024
Q2
$54.7M Buy
1,953,310
+902,376
+86% +$24.8M 0.17% 121
2024
Q1
$29.2M Sell
1,050,934
-26,704
-2% -$741K 0.09% 170
2023
Q4
$31M Sell
1,077,638
-69,307
-6% -$2.1M 0.11% 157
2023
Q3
$38M Sell
1,146,945
-69,775
-6% -$2.47M 0.15% 133
2023
Q2
$44.6M Sell
1,216,720
-88,497
-7% -$3.44M 0.16% 125
2023
Q1
$53.3M Sell
1,305,217
-28,757
-2% -$1.24M 0.21% 108
2022
Q4
$68.4M Buy
1,333,974
+75,619
+6% +$3.63M 0.3% 84
2022
Q3
$55.1M Buy
1,258,355
+40,736
+3% +$1.98M 0.25% 95
2022
Q2
$63.8M Sell
1,217,619
-5,866
-0.5% -$299K 0.28% 88
2022
Q1
$63.3M Buy
1,223,485
+15,392
+1% +$799K 0.22% 107
2021
Q4
$71.3M Buy
1,208,093
+64,298
+6% +$3.19M 0.22% 107
2021
Q3
$49.2M Buy
1,143,795
+55,915
+5% +$2.48M 0.17% 133
2021
Q2
$42.6M Sell
1,087,880
-65,603
-6% -$2.55M 0.15% 146
2021
Q1
$41.8M Sell
1,153,483
-28,063
-2% -$996K 0.16% 147
2020
Q4
$43.5M Buy
1,181,546
+17,020
+1% +$624K 0.16% 133
2020
Q3
$40.5M Buy
1,164,526
+202,048
+21% +$7.08M 0.17% 120
2020
Q2
$29.9M Buy
962,478
+47,871
+5% +$1.63M 0.14% 138
2020
Q1
$28.3M Buy
914,607
+10,824
+1% +$369K 0.18% 124
2019
Q4
$33.6M Sell
903,783
-51,017
-5% -$1.82M 0.17% 129
2019
Q3
$32.5M Sell
954,800
-29,444
-3% -$1.07M 0.19% 115
2019
Q2
$40.5M Buy
984,244
+7,413
+0.8% +$294K 0.23% 101
2019
Q1
$39.4M Sell
976,831
-9,827
-1% -$394K 0.24% 102
2018
Q4
$40.9M Buy
986,658
+9,000
+0.9% +$374K 0.3% 86
2018
Q3
$40.9M Buy
977,658
+7,089
+0.7% +$273K 0.25% 99
2018
Q2
$33.4M Buy
970,569
+9,143
+1% +$312K 0.23% 106
2018
Q1
$32.4M Sell
961,426
-53,498
-5% -$1.84M 0.23% 108
2017
Q4
$34.9M Buy
1,014,924
+12,585
+1% +$429K 0.24% 108
2017
Q3
$34M Buy
1,002,339
+17,401
+2% +$559K 0.25% 104
2017
Q2
$31.4M Buy
984,938
+65,026
+7% +$2.05M 0.24% 107
2017
Q1
$29.8M Buy
919,912
+147,825
+19% +$4.66M 0.24% 110
2016
Q4
$23.8M Buy
772,087
+23,730
+3% +$724K 0.21% 119
2016
Q3
$24M Buy
748,357
+3,580
+0.5% +$120K 0.21% 115
2016
Q2
$24.3M Buy
744,777
+11,549
+2% +$369K 0.23% 117
2016
Q1
$20.6M Buy
733,228
+8,666
+1% +$248K 0.19% 132
2015
Q4
$22.2M Buy
724,562
+9,515
+1% +$299K 0.21% 124
2015
Q3
$21.3M Buy
715,047
+4,135
+0.6% +$133K 0.18% 139
2015
Q2
$22.6M Buy
710,912
+5,274
+0.7% +$172K 0.03% 593
2015
Q1
$23.3M Sell
705,638
-9,791
-1% -$311K 0.04% 548
2014
Q4
$21.1M Buy
715,429
+106,109
+17% +$3.04M 0.03% 571
2014
Q3
$17.1M Sell
609,320
-3,755
-0.6% -$105K 0.03% 628
2014
Q2
$17.3M Buy
613,075
+47,686
+8% +$1.36M 0.03% 625
2014
Q1
$17.2M Buy
565,389
+41,661
+8% +$1.24M 0.03% 618
2013
Q4
$15.2M Sell
523,728
-13,687
-3% -$398K 0.03% 639
2013
Q3
$14.6M Sell
537,415
-5,751
-1% -$156K 0.03% 606
2013
Q2
$14.4M Buy
+543,166
New +$15M 0.03% 578

Other funds holding PFE

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

William Blair & Company reduced its Pfizer (PFE) stake by 0.91% in Q1 2026, selling an estimated $335K and leaving 1,370,097 shares worth $38.5M. The position accounts for 0.11% of the portfolio, ranked #167.

William Blair & Company first reported a position in PFE in Q2 2013 and has held it in 52 quarters since. The position peaked at $71.3M in Q4 2021. 2,939 funds tracked by Wall St. Rank hold PFE as of Q1 2026.

  • William Blair & Company held 1,370,097 shares of Pfizer worth $38.5M as of Q1 2026.
  • William Blair & Company sold 12,572 Pfizer shares in Q1 2026, an estimated $335K.
  • Pfizer made up 0.11% of William Blair & Company's portfolio in Q1 2026, its #167 holding.
  • William Blair & Company first reported a position in Pfizer in Q2 2013 and has held it in 52 quarters since.
  • William Blair & Company's Pfizer position peaked at $71.3M in Q4 2021.
  • 2,939 funds tracked by Wall St. Rank held Pfizer as of Q1 2026.

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