409 institutions reported holding ICLR for 2026Q1, together 101% of the company, fewer than the 504 a quarter earlier. Institutions reporting a position: 409 (as of 2026Q1). Shares held by institutions: 77.9M, long US equity positions only, as reported on Form 13F. Reported value: $8.72B, at 2026-03-31 prices, not today's. Top 5 holders: 34%, of the whole company, between five filers.

ICLRICON Public Limited Company

HealthcareUSD

$169.17

$80.0852 weeks$202.92

Who owns ICLR

409 institutions reported holding ICLR for 2026Q1, together 101% of the company, fewer than the 504 a quarter earlier.

409

Institutions reporting a position · as of 2026Q1 · down from 504 the quarter before

Shares held by institutions: 77.9M
Shares held by institutions · 101% of the company · long US equity positions only, as reported on Form 13F
Reported value: $8.72B
Reported value · at 2026-03-31 prices, not today's
Top 5 holders: 34%
Top 5 holders · of the whole company, between five filers

Details›

Reporting quarter2026-03-31: 2026Q1
Quarters on record: 52
New positions: 61
Positions exited: 157
Added to: 149
Reduced: 130
Top 10 holdersof the company: 51%

Institutional ownership by quarter, 2013Q2 to 2026Q1
Quarter	Filers	Shares	Reported value
2026Q1	409	77.9M	$8.72B
2025Q4	504	77.3M	$14.1B
2025Q3	504	74.2M	$13.0B
2025Q2	481	76.8M	$11.2B
2025Q1	548	75.6M	$13.4B
2024Q4	583	76.1M	$16.0B
2024Q3	651	78.6M	$22.3B
2024Q2	666	77.3M	$24.2B
2024Q1	632	77.7M	$26.0B
2023Q4	589	78.8M	$21.9B
2023Q3	546	80.2M	$19.6B
2023Q2	523	78.8M	$19.7B
2023Q1	519	74.7M	$15.9B
2022Q4	515	74.2M	$14.4B
2022Q3	477	75.4M	$13.9B
2022Q2	497	74.2M	$16.1B

Largest reported holders, 2026Q1
Holder	Shares	% of company	Value
Artisan Partners Limited Partnership	8.3M	11%	$916M
WELLINGTON MANAGEMENT GROUP LLP	5.9M	7.7%	$654M
HARRIS ASSOCIATES L P	4.4M	5.6%	$482M
FMR LLC	4.2M	5.4%	$462M
Invesco Ltd.	3.9M	5.0%	$429M
PRINCIPAL FINANCIAL GROUP INC	3.3M	4.3%	$366M
Brave Warrior Advisors, LLC	3.0M	3.9%	$332M
MASSACHUSETTS FINANCIAL SERVICES CO /MA/	2.7M	3.5%	$305M
Sachem Head Capital Management LP	2.1M	2.7%	$233M
GREENHAVEN ASSOCIATES INC	2.0M	2.6%	$222M

SEC Form 13F data sets (DERA bulk files). 13F is quarterly, filed up to 45 days late, and covers long US equity positions only, no shorts, no derivatives, nothing held below the reporting threshold.

reading the register…

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