William Blair & Company
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William Blair & Company’s Pfizer PFE Stock Holding History

William Blair & Company’s Portfolio PFE Stock Details PFE Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2017
Q3 		– Sell
-1,054
Closed -$34K – 1472
2017
Q2 		$34K Buy
+1,054
New +$33.2K ﹤0.01% 1495

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State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Fisher Asset Management
Fisher Asset Management Camas, Washington $336B AUM 34.66% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Norges Bank
Norges Bank Oslo, Norway $1T AUM
Northern Trust
Northern Trust Chicago, Illinois $860B AUM 41.15% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $609B AUM 40.19% 1-Year Est. Return

William Blair & Company's PFE Position: Q2 2026 in Review

William Blair & Company increased its Pfizer (PFE) stake by 2.6% in Q2 2026, buying an estimated $943K and bringing the position to 1,406,138 shares worth $33.9M. The position accounts for 0.09% of the portfolio, ranked #185.

William Blair & Company first reported a position in PFE in Q2 2013 and has held it in 53 quarters since. The position peaked at $71.3M in Q4 2021. 2,831 funds tracked by Wall St. Rank hold PFE as of Q2 2026.

  • William Blair & Company held 1,406,138 shares of Pfizer worth $33.9M as of Q2 2026.
  • William Blair & Company bought 36,041 Pfizer shares in Q2 2026, an estimated $943K.
  • Pfizer made up 0.09% of William Blair & Company's portfolio in Q2 2026, its #185 holding.
  • William Blair & Company first reported a position in Pfizer in Q2 2013 and has held it in 53 quarters since.
  • William Blair & Company's Pfizer position peaked at $71.3M in Q4 2021.
  • 2,831 funds tracked by Wall St. Rank held Pfizer as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.