William John Sempolinski
ARM icon

William John Sempolinski’s Arm ARM Stock Holding History

William John Sempolinski’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
Q3 		$396K Sell
1,367
-435
-24% -$118K 0.15% 73
2026
Q2 		$639K Hold
1,802
– – 0.26% 67
2026
Q1 		$273K Buy
+1,802
New +$219K 0.14% 78

Other funds holding ARM

Invesco
Invesco Atlanta, Georgia $1.27T AUM 50.62% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.96T AUM 27.49% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $704B AUM 26.74% 1-Year Est. Return
VanEck Associates
VanEck Associates New York $165B AUM 72.14% 1-Year Est. Return
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $234B AUM 43.58% 1-Year Est. Return
BlackRock
BlackRock New York $6.79T AUM 37.06% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.32T AUM 44.66% 1-Year Est. Return
Capital International Investors
Capital International Investors Los Angeles, California $483B AUM 27.72% 1-Year Est. Return
Alphabet Inc
Alphabet Inc Mountain View, California $88.3B AUM 46.07% 1-Year Est. Return
Baillie Gifford & Co
Baillie Gifford & Co Edinburgh, United Kingdom $106B AUM 2.29% 1-Year Est. Return

William John Sempolinski's ARM Position: Q3 2026 in Review

William John Sempolinski reduced its Arm (ARM) stake by 24% in Q3 2026, selling an estimated $118K and leaving 1,367 shares worth $396K. The position accounts for 0.15% of the portfolio, ranked #73.

William John Sempolinski first reported a position in ARM in Q1 2026 and has held it in 3 quarters since. The position peaked at $639K in Q2 2026. 778 funds tracked by Wall St. Rank hold ARM as of Q3 2026.

  • William John Sempolinski held 1,367 shares of Arm worth $396K as of Q3 2026.
  • William John Sempolinski sold 435 Arm shares in Q3 2026, an estimated $118K.
  • Arm made up 0.15% of William John Sempolinski's portfolio in Q3 2026, its #73 holding.
  • William John Sempolinski first reported a position in Arm in Q1 2026 and has held it in 3 quarters since.
  • William John Sempolinski's Arm position peaked at $639K in Q2 2026.
  • 778 funds tracked by Wall St. Rank held Arm as of Q3 2026.

Based on William John Sempolinski's 13F filing for Q3 2026, filed 20 Oct 2026.