William Blair & Company’s Arm ARM Stock Holding History

William Blair & Company’s Portfolio ARM Stock Details ARM Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$2.43M	Buy	16,047 +3,051	+23%	+$370K	0.01%	676
2025 Q4	$1.42M	Sell	12,996 -875	-6%	-$127K	﹤0.01%	839
2025 Q3	$1.96M	Sell	13,871 -3,446	-20%	-$502K	0.01%	736
2025 Q2	$2.8M	Sell	17,317 -71,119	-80%	-$8.83M	0.01%	635
2025 Q1	$9.44M	Buy	88,436 +11,056	+14%	+$1.54M	0.03%	341
2024 Q4	$9.55M	Buy	77,380 +28,217	+57%	+$3.98M	0.03%	351
2024 Q3	$7.03M	Buy	49,163 +43,643	+791%	+$6.2M	0.02%	418
2024 Q2	$903K	Buy	5,520 +3,100	+128%	+$385K	﹤0.01%	914
2024 Q1	$302K	Buy	+2,420	New	+$256K	﹤0.01%	1252

Other funds holding ARM

DZ Bank Frankfurt Am Main, Germany $113B AUM 36.92% 1-Year Est. Return

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Capital Research Global Investors Los Angeles, California $645B AUM 30.41% 1-Year Est. Return

Schroder Investment Management Group London, United Kingdom $122B AUM 29.27% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

VanEck Associates New York $133B AUM 72.99% 1-Year Est. Return

SGA

Sustainable Growth Advisers Stamford, Connecticut $10.6B AUM 2.6% 1-Year Est. Return

Alphabet Inc Mountain View, California $4.02B AUM 215.74% 1-Year Est. Return

ACM

Altimeter Capital Management Boston, Massachusetts $5.7B AUM 36.74% 1-Year Est. Return

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

William Blair & Company increased its Arm (ARM) stake by 23% in Q1 2026, buying an estimated $370K and bringing the position to 16,047 shares worth $2.43M. The position accounts for 0.01% of the portfolio, ranked #676.

William Blair & Company first reported a position in ARM in Q1 2024 and has held it in 9 quarters since. The position peaked at $9.55M in Q4 2024. 742 funds tracked by Wall St. Rank hold ARM as of Q1 2026.

William Blair & Company held 16,047 shares of Arm worth $2.43M as of Q1 2026.
William Blair & Company bought 3,051 Arm shares in Q1 2026, an estimated $370K.
Arm made up 0.01% of William Blair & Company's portfolio in Q1 2026, its #676 holding.
William Blair & Company first reported a position in Arm in Q1 2024 and has held it in 9 quarters since.
William Blair & Company's Arm position peaked at $9.55M in Q4 2024.
742 funds tracked by Wall St. Rank held Arm as of Q1 2026.

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