Marshall Wace’s Amphenol APH Stock Holding History

Marshall Wace’s Portfolio APH Stock Details APH Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q3	–	Sell	-187,500	Closed	-$18.5M	–	2868
2025 Q2	$18.5M	Buy	+187,500	New	+$15.3M	0.02%	611

Other funds holding APH

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

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

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Capital International Investors Los Angeles, California $427B AUM 29.17% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

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

T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return

Marshall Wace's APH Position: Q1 2026 in Review

Marshall Wace increased its Amphenol (APH) stake by 375% in Q1 2026, buying an estimated $260M and bringing the position to 2,337,310 shares worth $295M. The position accounts for 0.29% of the portfolio, ranked #47.

Marshall Wace first reported a position in APH in Q2 2015 and has held it in 22 quarters since. 2,114 funds tracked by Wall St. Rank hold APH as of Q1 2026.

Marshall Wace held 2,337,310 shares of Amphenol worth $295M as of Q1 2026.
Marshall Wace bought 1,845,717 Amphenol shares in Q1 2026, an estimated $260M.
Amphenol made up 0.29% of Marshall Wace's portfolio in Q1 2026, its #47 holding.
Marshall Wace first reported a position in Amphenol in Q2 2015 and has held it in 22 quarters since.
2,114 funds tracked by Wall St. Rank held Amphenol as of Q1 2026.

Based on Marshall Wace's 13F filing for Q1 2026, filed 15 May 2026.