ICLR · Icon PLC · Shareholders & Ownership

$174.19 +6.05 (+3.60%) At close · Oct 20

Market Cap

$13.44B

77.15M

Volume · Oct 20 936.32K Avg daily vol (3M) 849.53K

Every disclosed holder of ICLR in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns ICLR

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

No chart: shares outstanding cannot be set against these holders.

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	419	80,010,488	—	Yes
Insiders (Forms 3, 4, 5)	11	131,480	—	Yes
13D/G-only blocks	2	4,407,946	—	Yes
Registered funds (N-PORT, not summed)	112	10,692,146	—	No

% Out is unavailable: a foreign private issuer reports ordinary shares, a different unit from the listed shares.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of ICLR

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	Artisan Partners Limited Partnership 13F CIK 1466153 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	8,636,406	—	+357,461	Jun 30, 2026	carried, not yet filed for the newest quarter
2	WELLINGTON MANAGEMENT GROUP LLP 13F CIK 902219 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	5,320,054	—	-592,983	Jun 30, 2026	carried, not yet filed for the newest quarter
2.1	VANGUARD HEALTH CARE FUND Fund S000002922 · Registered fund · Jul 31, 2026 VANGUARD SPECIALIZED FUNDS, not summed	933,744	—	-604,366	Jul 31, 2026	VANGUARD SPECIALIZED FUNDS, not summed
2.2	VANGUARD ADVICE SELECT GLOBAL VALUE FUND Fund S000074282 · Registered fund · Jul 31, 2026 VANGUARD WHITEHALL FUNDS, not summed	81,678	—	-20,380	Jul 31, 2026	VANGUARD WHITEHALL FUNDS, not summed
3	FMR LLC 13F CIK 315066 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	5,271,321	—	+1,097,315	Jun 30, 2026	carried, not yet filed for the newest quarter
3.1	FMR LLC 13G CIK 315066 · Holding company · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	5,271,320	—	—	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
4	Invesco Ltd. 13F CIK 914208 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	5,264,236	—	+1,385,367	Jun 30, 2026	carried, not yet filed for the newest quarter
4.1	Invesco Ltd. 13G CIK 914208 · Investment adviser · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	5,264,236	—	—	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
4.2	Invesco Small Cap Value Fund Fund S000027837 · Registered fund · Jul 31, 2026 AIM Sector Funds (Invesco Sector Funds), not summed	1,042,659	—	0	Jul 31, 2026	AIM Sector Funds (Invesco Sector Funds), not summed
4.3	Invesco Comstock Fund Fund S000027834 · Registered fund · Jul 31, 2026 AIM Sector Funds (Invesco Sector Funds), not summed	776,063	—	0	Jul 31, 2026	AIM Sector Funds (Invesco Sector Funds), not summed
4.4	Invesco Value Opportunities Fund Fund S000027840 · Registered fund · Jul 31, 2026 AIM Sector Funds (Invesco Sector Funds), not summed	767,330	—	0	Jul 31, 2026	AIM Sector Funds (Invesco Sector Funds), not summed
4.5	Invesco International Small-Mid Company Fund Fund S000064623 · Registered fund · Jul 31, 2026 AIM International Mutual Funds (Invesco International Mutual Funds), not summed	241,456	—	-82,488	Jul 31, 2026	AIM International Mutual Funds (Invesco International Mutual Funds), not summed
5	HARRIS ASSOCIATES L P 13F CIK 813917 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	4,468,146	—	+116,829	Jun 30, 2026	carried, not yet filed for the newest quarter
6	Orbis Investment Management Limited 13G CIK 940594 · Exempt reporting adviser · Dec 31, 2025 Rule 13d-1(b), qualified institution	4,208,000	—	+73,823	Dec 31, 2025	Rule 13d-1(b), qualified institution
7	Brave Warrior Advisors, LLC 13F CIK 1553733 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,153,308	—	+156,497	Jun 30, 2026	carried, not yet filed for the newest quarter
8	GREENHAVEN ASSOCIATES INC 13F CIK 846222 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,100,615	—	+1,098,204	Jun 30, 2026	carried, not yet filed for the newest quarter
9	PRINCIPAL FINANCIAL GROUP INC 13F CIK 1126328 · Insurance company · Jun 30, 2026 carried, not yet filed for the newest quarter	2,950,974	—	-360,797	Jun 30, 2026	carried, not yet filed for the newest quarter
9.1	International Equity Fund Fund S000007083 · Registered fund · Jul 31, 2026 Principal Funds, Inc, not summed	652,500	—	-112,566	Jul 31, 2026	Principal Funds, Inc, not summed
9.2	Diversified International Fund Fund S000006992 · Registered fund · Jul 31, 2026 Principal Funds, Inc, not summed	59,345	—	+3,642	Jul 31, 2026	Principal Funds, Inc, not summed
9.3	Diversified International Account Fund S000007681 · Registered fund · Jun 30, 2026 Principal Variable Contract Funds, Inc, not summed	15,478	—	+603	Jun 30, 2026	Principal Variable Contract Funds, Inc, not summed
10	MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 13F CIK 912938 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,105,171	—	-622,653	Jun 30, 2026	carried, not yet filed for the newest quarter
11	Ruane, Cunniff & Goldfarb L.P. 13F CIK 1720792 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,048,087	—	+413,476	Jun 30, 2026	carried, not yet filed for the newest quarter
12	Boston Partners 13F CIK 1386060 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,620,730	—	+785,591	Jun 30, 2026	carried, not yet filed for the newest quarter
13	Trinity Street Asset Management LLP 13F CIK 1592579 · Registered investment adviser · Sep 30, 2026	1,487,375	—	-48,087	Sep 30, 2026
14	ALLIANCEBERNSTEIN L.P. 13F CIK 1109448 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,378,196	—	+33,601	Jun 30, 2026	carried, not yet filed for the newest quarter
15	D. E. Shaw & Co., Inc. 13F CIK 1009207 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,357,143	—	+158,588	Jun 30, 2026	carried, not yet filed for the newest quarter
16	DIMENSIONAL FUND ADVISORS LP 13F CIK 354204 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,270,230	—	+481,402	Jun 30, 2026	carried, not yet filed for the newest quarter
16.1	Dimensional US Small Cap Value ETF Fund S000075151 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	198,490	—	+72,846	Jul 31, 2026	Dimensional ETF Trust, not summed
16.2	Dimensional U.S. Targeted Value ETF Fund S000070901 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	113,896	—	+29,080	Jul 31, 2026	Dimensional ETF Trust, not summed
16.3	Dimensional U.S. Core Equity 2 ETF Fund S000070903 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	78,775	—	+30,223	Jul 31, 2026	Dimensional ETF Trust, not summed
16.4	Dimensional U.S. Small Cap ETF Fund S000070906 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	37,495	—	+15,992	Jul 31, 2026	Dimensional ETF Trust, not summed
16.5	Dimensional U.S. Equity Market ETF Fund S000070902 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	24,064	—	+7,222	Jul 31, 2026	Dimensional ETF Trust, not summed
17	EARNEST PARTNERS LLC 13F CIK 1102578 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,242,639	—	+356,849	Jun 30, 2026	carried, not yet filed for the newest quarter
18	Maple Rock Capital Partners Inc. 13F CIK 1658363 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,199,600	—	+864,300	Jun 30, 2026	carried, not yet filed for the newest quarter
19	1832 Asset Management L.P. 13F CIK 944388 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	1,194,860	—	+1,620	Jun 30, 2026	carried, not yet filed for the newest quarter
20	BRANDES INVESTMENT PARTNERS, LP 13F CIK 1015079 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,185,774	—	-249,279	Jun 30, 2026	carried, not yet filed for the newest quarter
20.1	Brandes Global Equity Fund Fund S000084887 · Registered fund · Jun 30, 2026 Datum One Series Trust, not summed	8,182	—	-184	Jun 30, 2026	Datum One Series Trust, not summed
21	Capital World Investors 13F CIK 1422849 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,106,056	—	+1,225	Jun 30, 2026	carried, not yet filed for the newest quarter
22	AMERIPRISE FINANCIAL INC 13F CIK 820027 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	979,596	—	+877,359	Jun 30, 2026	carried, not yet filed for the newest quarter
23	VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V. 13F CIK 1367401 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	961,665	—	+42,952	Jun 30, 2026	carried, not yet filed for the newest quarter
24	VANGUARD WINDSOR FUND Fund S000004417 · Registered fund · Jul 31, 2026 VANGUARD WINDSOR FUNDS, not summed	943,171	—	-254,241	Jul 31, 2026	VANGUARD WINDSOR FUNDS, not summed
25	SEI INVESTMENTS CO 13F CIK 350894 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	902,185	—	+144,696	Jun 30, 2026	carried, not yet filed for the newest quarter
25.1	SIIT LARGE CAP DISCIPLINED EQUITY FUND Fund S000006769 · Registered fund · May 31, 2026 SEI INSTITUTIONAL INVESTMENTS TRUST, not summed	24,260	—	-250	May 31, 2026	SEI INSTITUTIONAL INVESTMENTS TRUST, not summed
25.2	Catholic Values Equity Fund Fund S000048320 · Registered fund · May 31, 2026 SEI CATHOLIC VALUES TRUST, not summed	3,707	—	+2,487	May 31, 2026	SEI CATHOLIC VALUES TRUST, not summed
26	EQUITY INVESTMENT CORP 13F CIK 1685771 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	888,875	—	-207,520	Jun 30, 2026	carried, not yet filed for the newest quarter
27	LYRICAL ASSET MANAGEMENT LP 13F CIK 1542302 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	881,179	—	-57,025	Jun 30, 2026	carried, not yet filed for the newest quarter
27.1	LYRICAL U.S. VALUE EQUITY FUND Fund S000039711 · Registered fund · May 31, 2026 Ultimus Managers Trust, not summed	163,844	—	-8,558	May 31, 2026	Ultimus Managers Trust, not summed
27.2	LYRICAL INTERNATIONAL VALUE EQUITY FUND Fund S000068142 · Registered fund · May 31, 2026 Ultimus Managers Trust, not summed	9,638	—	+5,764	May 31, 2026	Ultimus Managers Trust, not summed
28	VANGUARD EXPLORER FUND Fund S000002578 · Registered fund · Jul 31, 2026 VANGUARD EXPLORER FUND, not summed	827,916	—	-169,264	Jul 31, 2026	VANGUARD EXPLORER FUND, not summed
29	NORGES BANK 13F CIK 1374170 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	820,998	—	—	Jun 30, 2026	carried, not yet filed for the newest quarter
30	Thrivent Financial for Lutherans 13F CIK 314984 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	802,415	—	+180,049	Jun 30, 2026	carried, not yet filed for the newest quarter
30.1	THRIVENT LARGE CAP VALUE PORTFOLIO Fund S000001428 · Registered fund · Jun 30, 2026 Thrivent Series Fund, Inc., not summed	224,988	—	+56,918	Jun 30, 2026	Thrivent Series Fund, Inc., not summed
30.2	THRIVENT LARGE CAP VALUE FUND Fund S000001366 · Registered fund · Jul 31, 2026 Thrivent Mutual Funds, not summed	219,544	—	+31,416	Jul 31, 2026	Thrivent Mutual Funds, not summed
30.3	THRIVENT GLOBAL STOCK FUND Fund S000001365 · Registered fund · Jul 31, 2026 Thrivent Mutual Funds, not summed	36,806	—	+4,538	Jul 31, 2026	Thrivent Mutual Funds, not summed
30.4	THRIVENT MODERATELY AGGRESSIVE ALLOCATION FUND Fund S000001347 · Registered fund · Jul 31, 2026 Thrivent Mutual Funds, not summed	33,028	—	+4,944	Jul 31, 2026	Thrivent Mutual Funds, not summed
30.5	THRIVENT GLOBAL STOCK PORTFOLIO Fund S000001429 · Registered fund · Jun 30, 2026 Thrivent Series Fund, Inc., not summed	31,962	—	+7,594	Jun 30, 2026	Thrivent Series Fund, Inc., not summed
31	FRANKLIN RESOURCES INC 13F CIK 38777 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	771,084	—	-45,001	Jun 30, 2026	carried, not yet filed for the newest quarter
32	Stephens Investment Management Group LLC 13F CIK 1314440 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	720,261	—	+121,085	Jun 30, 2026	carried, not yet filed for the newest quarter
33	First Pacific Advisors, LP 13F CIK 1377581 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	606,523	—	-384,552	Jun 30, 2026	carried, not yet filed for the newest quarter
33.1	FPA Crescent Fund Fund S000009495 · Registered fund · Jun 30, 2026 Investment Managers Series Trust III, not summed	382,104	—	-198,139	Jun 30, 2026	Investment Managers Series Trust III, not summed
34	Russell Investments Group, Ltd. 13F CIK 1692234 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	599,198	—	+84,892	Jun 30, 2026	carried, not yet filed for the newest quarter
35	LAKEWOOD CAPITAL MANAGEMENT, LP 13F CIK 1424381 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	585,200	—	-162,500	Jun 30, 2026	carried, not yet filed for the newest quarter
36	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	546,437	—	-65,828	Jun 30, 2026	carried, not yet filed for the newest quarter
37	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	534,935	—	+121,339	Jun 30, 2026	carried, not yet filed for the newest quarter
37.1	iShares MSCI Ireland ETF Fund S000028681 · Registered fund · May 31, 2026 iShares Trust, not summed	31,933	—	+13,506	May 31, 2026	iShares Trust, not summed
38	BANK OF AMERICA CORP /DE/ 13F CIK 70858 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	503,099	—	-40,388	Jun 30, 2026	carried, not yet filed for the newest quarter
39	Zurich Insurance Group Ltd/FI 13F CIK 1127799 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	481,208	—	+371,282	Jun 30, 2026	carried, not yet filed for the newest quarter
40	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	450,717	—	-179,904	Jun 30, 2026	carried, not yet filed for the newest quarter
41	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	437,853	—	-19,356	Jun 30, 2026	carried, not yet filed for the newest quarter
42	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	414,192	—	+121,050	Jun 30, 2026	carried, not yet filed for the newest quarter
43	Aberdeen Group plc 13F CIK 1716774 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	394,362	—	-4,928	Jun 30, 2026	carried, not yet filed for the newest quarter
44	BAMCO INC /NY/ 13F CIK 1017918 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	376,805	—	-50,000	Jun 30, 2026	carried, not yet filed for the newest quarter
45	JANE STREET GROUP, LLC 13F CIK 1595888 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	374,800	—	+372,350	Jun 30, 2026	carried, not yet filed for the newest quarter
46	HUDSON EDGE INVESTMENT PARTNERS INC. 13F CIK 740272 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	366,477	—	+47,474	Jun 30, 2026	carried, not yet filed for the newest quarter
47	Point72 Asset Management, L.P. 13F CIK 1603466 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	365,945	—	+356,082	Jun 30, 2026	carried, not yet filed for the newest quarter
48	Woodline Partners LP 13F CIK 1784547 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	327,184	—	+327,184	Jun 30, 2026	carried, not yet filed for the newest quarter
49	Eagle Health Investments LP 13F CIK 1842545 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	308,143	—	-50,357	Jun 30, 2026	carried, not yet filed for the newest quarter
50	Zuckerman Investment Group, LLC 13F CIK 1423296 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	294,439	—	+13,447	Jun 30, 2026	carried, not yet filed for the newest quarter

29 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 468 holders

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Key facts CIK 1060955 CUSIP G4705A100 13F (30d) 73 filings 44 filers Visit website Investor relations