William Blair & Company
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William Blair & Company’s Twist Bioscience TWST Stock Holding History

William Blair & Company’s Portfolio TWST Stock Details TWST Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$26.4M Buy
256,556
+199,139
+347% +$13M 0.07% 215
2026
Q1 		$2.73M Sell
57,417
-24,144
-30% -$1.08M 0.01% 655
2025
Q4 		$2.59M Buy
81,561
+22,482
+38% +$701K 0.01% 680
2025
Q3 		$1.66M Sell
59,079
-642
-1% -$19.4K ﹤0.01% 779
2025
Q2 		$2.2M Sell
59,721
-2,245
-4% -$77.6K 0.01% 696
2025
Q1 		$2.43M Sell
61,966
-5,980
-9% -$269K 0.01% 667
2024
Q4 		$3.16M Sell
67,946
-19,355
-22% -$875K 0.01% 610
2024
Q3 		$3.94M Buy
87,301
+70,803
+429% +$3.37M 0.01% 555
2024
Q2 		$813K Sell
16,498
-5,210
-24% -$212K ﹤0.01% 946
2024
Q1 		$745K Sell
21,708
-1,650
-7% -$59.6K ﹤0.01% 969
2023
Q4 		$861K Sell
23,358
-1,910
-8% -$44.2K ﹤0.01% 902
2023
Q3 		$512K Sell
25,268
-1,840
-7% -$40.4K ﹤0.01% 1051
2023
Q2 		$555K Sell
27,108
-17,796
-40% -$267K ﹤0.01% 1018
2023
Q1 		$677K Sell
44,904
-30,192
-40% -$667K ﹤0.01% 944
2022
Q4 		$1.79M Buy
75,096
+67,335
+868% +$1.95M 0.01% 664
2022
Q3 		$273K Sell
7,761
-2,320
-23% -$98.5K ﹤0.01% 1267
2022
Q2 		$352K Buy
10,081
+3,168
+46% +$112K ﹤0.01% 1203
2022
Q1 		$341K Buy
6,913
+1,042
+18% +$57.7K ﹤0.01% 1310
2021
Q4 		$454K Buy
5,871
+1,761
+43% +$181K ﹤0.01% 1252
2021
Q3 		$440K Buy
4,110
+1,971
+92% +$226K ﹤0.01% 1200
2021
Q2 		$285K Sell
2,139
-122
-5% -$14.2K ﹤0.01% 1360
2021
Q1 		$280K Sell
2,261
-19
-0.8% -$2.88K ﹤0.01% 1352
2020
Q4 		$322K Buy
+2,280
New +$253K ﹤0.01% 1232

Other funds holding TWST

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Artisan Partners
Artisan Partners Milwaukee, Wisconsin $63.1B AUM 35.51% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
AIM
ARK Investment Management St. Petersburg, Florida $15.4B AUM 50.29% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
EIG
EdgePoint Investment Group Toronto, Ontario, Canada $13.2B AUM 32.43% 1-Year Est. Return
William Blair Investment Management
William Blair Investment Management Chicago, Illinois $33.3B AUM 44.76% 1-Year Est. Return

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

William Blair & Company increased its Twist Bioscience (TWST) stake by 347% in Q2 2026, buying an estimated $13M and bringing the position to 256,556 shares worth $26.4M. The position accounts for 0.07% of the portfolio, ranked #215.

William Blair & Company first reported a position in TWST in Q4 2020 and has held it in 23 quarters since. 337 funds tracked by Wall St. Rank hold TWST as of Q2 2026.

  • William Blair & Company held 256,556 shares of Twist Bioscience worth $26.4M as of Q2 2026.
  • William Blair & Company bought 199,139 Twist Bioscience shares in Q2 2026, an estimated $13M.
  • Twist Bioscience made up 0.07% of William Blair & Company's portfolio in Q2 2026, its #215 holding.
  • William Blair & Company first reported a position in Twist Bioscience in Q4 2020 and has held it in 23 quarters since.
  • 337 funds tracked by Wall St. Rank held Twist Bioscience as of Q2 2026.

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