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Westmount Partners’s Illumina ILMN Stock Holding History

Westmount Partners’s Portfolio ILMN Stock Details ILMN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$4M Sell
22,726
-12,393
-35% -$1.81M 0.87% 20
2026
Q1 		$4.33M Sell
35,119
-4,984
-12% -$654K 1.07% 18
2025
Q4 		$5.26M Sell
40,103
-7,506
-16% -$881K 1.31% 16
2025
Q3 		$4.87M Hold
47,609
– – 1.26% 18
2025
Q2 		$4.54M Hold
47,609
– – 1.25% 17
2025
Q1 		$3.78M Hold
47,609
– – 1.15% 18
2024
Q4 		$6.36M Hold
47,609
– – 1.93% 11
2024
Q3 		$6.21M Hold
47,609
– – 1.87% 12
2024
Q2 		$5.02M Sell
47,609
-1,333
-3% -$150K 1.66% 12
2024
Q1 		$6.54M Sell
48,942
-5
-0% -$670 2.35% 7
2023
Q4 		$6.63M Hold
48,947
– – 2.71% 5
2023
Q3 		$6.54M Hold
48,947
– – 2.88% 5
2023
Q2 		$8.93M Hold
48,947
– – 3.89% 4
2023
Q1 		$11.1M Hold
48,947
– – 5.12% 2
2022
Q4 		$9.63M Buy
+48,947
New +$10.1M 5% 3

Other funds holding ILMN

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 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
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
WCM Investment Management
WCM Investment Management Laguna Beach, California $55.2B AUM 57.07% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Westmount Partners's ILMN Position: Q2 2026 in Review

Westmount Partners reduced its Illumina (ILMN) stake by 35% in Q2 2026, selling an estimated $1.81M and leaving 22,726 shares worth $4M. The position accounts for 0.87% of the portfolio, ranked #20.

Westmount Partners first reported a position in ILMN in Q4 2022 and has held it in 15 quarters since. The position peaked at $11.1M in Q1 2023. 937 funds tracked by Wall St. Rank hold ILMN as of Q2 2026.

  • Westmount Partners held 22,726 shares of Illumina worth $4M as of Q2 2026.
  • Westmount Partners sold 12,393 Illumina shares in Q2 2026, an estimated $1.81M.
  • Illumina made up 0.87% of Westmount Partners's portfolio in Q2 2026, its #20 holding.
  • Westmount Partners first reported a position in Illumina in Q4 2022 and has held it in 15 quarters since.
  • Westmount Partners's Illumina position peaked at $11.1M in Q1 2023.
  • 937 funds tracked by Wall St. Rank held Illumina as of Q2 2026.

Based on Westmount Partners's 13F filing for Q2 2026, filed 7 Jul 2026.