William Blair Investment Management
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William Blair Investment Management’s AstraZeneca AZN Stock Holding History

William Blair Investment Management’s Portfolio AZN Stock Details AZN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$283M Sell
1,514,795
-427,360
-22% -$80.4M 0.85% 13
2026
Q1 		$377M Buy
1,942,155
+1,918,625
+8,154% +$370M 1.25% 10
2025
Q4 		$4.33M Buy
23,530
+7,124
+43% +$1.25M 0.01% 343
2025
Q3 		$2.52M Sell
16,406
-33
-0.2% -$5K 0.01% 347
2025
Q2 		$2.3M Buy
16,439
+2,349
+17% +$329K 0.01% 357
2025
Q1 		$2.07M Sell
14,090
-1,497
-10% -$217K 0.01% 355
2024
Q4 		$2.04M Sell
15,587
-13,035
-46% -$1.82M 0.01% 362
2024
Q3 		$4.46M Sell
28,622
-4
-0% -$646 0.01% 340
2024
Q2 		$4.47M Sell
28,626
-8,695
-23% -$1.31M 0.01% 343
2024
Q1 		$5.06M Buy
37,321
+944
+3% +$125K 0.01% 336
2023
Q4 		$4.9M Sell
36,377
-1,295
-3% -$168K 0.01% 336
2023
Q3 		$5.1M Buy
37,672
+2,388
+7% +$326K 0.02% 330
2023
Q2 		$5.05M Buy
35,284
+4,934
+16% +$726K 0.02% 337
2023
Q1 		$4.21M Sell
30,350
-147
-0.5% -$19.8K 0.01% 335
2022
Q4 		$4.14M Buy
30,497
+3,784
+14% +$475K 0.02% 333
2022
Q3 		$2.93M Sell
26,713
-511
-2% -$64.8K 0.01% 341
2022
Q2 		$3.6M Sell
27,224
-1,316
-5% -$173K 0.01% 343
2022
Q1 		$3.79M Buy
+28,540
New +$3.42M 0.01% 348
2020
Q1 		– Sell
-44,167
Closed -$4.4M – 342
2019
Q4 		$4.4M Buy
44,167
+93
+0.2% +$8.76K 0.02% 325
2019
Q3 		$3.93M Sell
44,074
-9,177
-17% -$796K 0.02% 327
2019
Q2 		$4.4M Sell
53,251
-23,942
-31% -$1.88M 0.02% 335
2019
Q1 		$6.24M Sell
77,193
-20,419
-21% -$1.61M 0.03% 335
2018
Q4 		$7.42M Buy
97,612
+13,017
+15% +$1.02M 0.04% 325
2018
Q3 		$6.7M Buy
84,595
+24,331
+40% +$1.84M 0.02% 351
2018
Q2 		$4.23M Sell
60,264
-27,111
-31% -$1.95M 0.02% 368
2018
Q1 		$6.11M Buy
87,375
+14,008
+19% +$970K 0.02% 350
2017
Q4 		$5.09M Buy
73,367
+103
+0.1% +$6.95K 0.02% 346
2017
Q3 		$4.96M Buy
+73,264
New +$4.63M 0.02% 354

Other funds holding AZN

EP
Evelyn Partners London $46.9B AUM
IA
Investor AB Stockholm, Sweden $14.4B AUM 4.07% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Capital International Investors
Capital International Investors Los Angeles, California $484B AUM 34.9% 1-Year Est. Return
Norges Bank
Norges Bank Oslo, Norway $1T AUM
Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
Legal & General Group
Legal & General Group London, United Kingdom $480B AUM 42.84% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

William Blair Investment Management's AZN Position: Q2 2026 in Review

William Blair Investment Management reduced its AstraZeneca (AZN) stake by 22% in Q2 2026, selling an estimated $80.4M and leaving 1,514,795 shares worth $283M. The position accounts for 0.85% of the portfolio, ranked #13.

William Blair Investment Management first reported a position in AZN in Q3 2017 and has held it in 28 quarters since. The position peaked at $377M in Q1 2026. 1,495 funds tracked by Wall St. Rank hold AZN as of Q2 2026.

  • William Blair Investment Management held 1,514,795 shares of AstraZeneca worth $283M as of Q2 2026.
  • William Blair Investment Management sold 427,360 AstraZeneca shares in Q2 2026, an estimated $80.4M.
  • AstraZeneca made up 0.85% of William Blair Investment Management's portfolio in Q2 2026, its #13 holding.
  • William Blair Investment Management first reported a position in AstraZeneca in Q3 2017 and has held it in 28 quarters since.
  • William Blair Investment Management's AstraZeneca position peaked at $377M in Q1 2026.
  • 1,495 funds tracked by Wall St. Rank held AstraZeneca as of Q2 2026.

Based on William Blair Investment Management's 13F filing for Q2 2026, filed 12 Aug 2026.