Which superinvestors hold Icon Plc (ICLR)?

Per the latest SEC 13F filings, 7 superinvestors hold Icon Plc (ICLR): Bill Nygren, Glenn Greenberg, Edgar Wachenheim, Ruane, Cunniff (Sequoia), Steven Romick, Harry Burn, Lee Ainslie. Combined value held is about $1.40B, with Bill Nygren the largest holder.

Icon Plc

Held by 7 superinvestors (ICLR).

Educational data only — not investment advice. 13F positions are self-reported and can lag up to 45 days.

Ownership · 13F consensus

Who's buying it

Institutional ownership aggregated across funds — consensus strength and this quarter's moves. Describes actions, not advice.

7 superinvestors hold it · $1.40B combined

This quarter3 opened3 added1 trimmed1 exited

Largest holder Bill Nygren

13F positions are self-reported and can lag up to 45 days. Informational only — not investment advice.

Superinvestors Holding This Security

Investor	Value	Shares	Weight (prev→now)
Bill Nygren	$481.5M	4,351,317	0.6% → 0.6% ▲
Glenn Greenberg	$331.6M	2,996,811	New · 8.2%
Edgar Wachenheim	$221.6M	2,002,411	0.1% → 3.6% ▲
Ruane, Cunniff (Sequoia)	$180.9M	1,634,611	4.8% → 3.0% ▼
Steven Romick	$109.7M	991,075	2.4% → 1.5% ▲
Harry Burn	$69.4M	626,958	New · 2.3%
Lee Ainslie	$1.5M	13,887	New · 0.0%

Bill Nygren
Value$481.5MWeight (prev→now)0.6% → 0.6% ▲
Glenn Greenberg
Value$331.6MWeight (prev→now)New · 8.2%
Edgar Wachenheim
Value$221.6MWeight (prev→now)0.1% → 3.6% ▲
Ruane, Cunniff (Sequoia)
Value$180.9MWeight (prev→now)4.8% → 3.0% ▼
Steven Romick
Value$109.7MWeight (prev→now)2.4% → 1.5% ▲
Harry Burn
Value$69.4MWeight (prev→now)New · 2.3%
Lee Ainslie
Value$1.5MWeight (prev→now)New · 0.0%

Exited this quarter (1)

Polen Capital

Ownership overview

Icon Plc (ICLR) is held by 7 of the superinvestors tracked on Compounder, with a combined $1.40B in reported 13F value. The largest position belongs to Bill Nygren, where it makes up 0.6% of the portfolio.

Other notable holders by value include Glenn Greenberg (8.2% of its book), Edgar Wachenheim (3.6% of its book) and Ruane, Cunniff (Sequoia) (3.0% of its book).

Over the latest quarter, 3 of the tracked filers opened a new position in ICLR, 3 added to existing ones, 1 trimmed, and 1 sold out entirely.

Holder counts and values reflect the most recent SEC Form 13F filings, through the quarter ended 2026-03-31. Source: SEC EDGAR. A 13F shows only long US-listed positions and can lag the real portfolio by up to 45 days, so this is disclosed long ownership, not a complete picture.

Holders over time

Superinvestors holding this security over the last 8 quarters: 2 → 7.

Early quarters may understate holder counts due to data backfill — read the slope with care.

Key facts & links

Ticker: ICLR
Total value held: $1.40B
Largest holder: Bill Nygren
External

Sources· SEC EDGAR 13F as of 2026-05-15

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