Vault-13

ICON PLC ICLR

SHS · Common Stock · CUSIP G4705A100

531 institutional holders -5 vs Q1 2023
79,540,25379.5m shares reported held*
$19.9bnreported value*
61 new 185 added 199 reduced 65 sold out net bought ≈ $357.5m (+1.5m shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($9.5m this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $250.31. Options: 10 managers hold calls ($16.6m notional), 12 hold puts ($9.0m).

Trends to Q2 2023

Institutional holders

Managers reporting a position, each quarter

0200400600Q3 22: 487Q4 22: 527Q1 23: 536Q2 23: 531531Q3 22Q4 22Q1 23Q2 23
Numbers
QuarterHolders
Q3 2022487
Q4 2022527
Q1 2023536
Q2 2023531

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
4000400Q4 22: 238 bought or addedQ4 22: 253 cut or sold outQ4 22Q1 23: 261 bought or addedQ1 23: 233 cut or sold outQ1 23Q2 23: 246 bought or addedQ2 23: 264 cut or sold outQ2 23
Numbers
QuarterBought or addedCut or sold out
Q4 2022238253
Q1 2023261233
Q2 2023246264

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$5m$10m$15m$20mQ3 22 calls: $6.4mQ3 22 puts: $4.0mQ3 22P/C 0.62Q4 22 calls: $19.5mQ4 22 puts: $2.1mQ4 22P/C 0.11Q1 23 calls: $18.9mQ1 23 puts: $5.3mQ1 23P/C 0.28Q2 23 calls: $16.6mQ2 23 puts: $9.0mQ2 23P/C 0.54
Numbers
QuarterCallsPutsP/C
Q3 2022$6.4m$4.0m0.62
Q4 2022$19.5m$2.1m0.11
Q1 2023$18.9m$5.3m0.28
Q2 2023$16.6m$9.0m0.54

Biggest buyers

BlackRock Inc. Added +1,489,688+1.5m
BlueSpruce Investments, LP New +1,141,906+1.1m
STATE STREET CORP Added +818,762+818.8k
LAZARD ASSET MANAGEMENT LLC Added +456,675+456.7k
Ninety One UK Ltd Added +407,617+407.6k
WELLINGTON MANAGEMENT GROUP LLP Added +392,030+392.0k
Sustainable Growth Advisers, LP Added +388,529+388.5k
Point72 Asset Management, L.P. Added +387,171+387.2k
Capital Research Global Investors Added +340,035+340.0k
MARSHALL WACE, LLP Added +337,951+338.0k

Biggest sellers

FMR LLC Reduced -2,820,572-2.8m
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ Reduced -1,517,005-1.5m
Perpetual Ltd Reduced -802,682-802.7k
Artisan Partners Limited Partnership Sold out -669,962-670.0k
MILLENNIUM MANAGEMENT LLC Reduced -363,151-363.2k
Clearbridge Investments, LLC Reduced -331,186-331.2k
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Reduced -287,967-288.0k
AMERICAN CENTURY COMPANIES INC Reduced -263,565-263.6k
JENNISON ASSOCIATES LLC Reduced -260,782-260.8k
STEADFAST CAPITAL MANAGEMENT LP Reduced -211,353-211.4k

Biggest calls

CITADEL ADVISORS LLC Reduced $7.5m29.8k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Added $4.3m17.0k shares
Walleye Trading LLC Reduced $2.1m8.2k shares
SIMPLEX TRADING, LLC Added $825.0k3.3k shares
Walleye Capital LLC Added $750.6k3.0k shares
JANE STREET GROUP, LLC New $475.4k1.9k shares
Cubist Systematic Strategies, LLC New $475.4k1.9k shares
PEAK6 Investments LLC Added $325.3k1.3k shares
GROUP ONE TRADING LLC Unchanged $25.0k100 shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Biggest puts

CITADEL ADVISORS LLC Added $2.4m9.4k shares
Walleye Trading LLC Added $1.4m5.4k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Added $1.3m5.2k shares
Walleye Capital LLC Added $925.7k3.7k shares
Cubist Systematic Strategies, LLC New $875.7k3.5k shares
MILLENNIUM MANAGEMENT LLC Reduced $500.4k2.0k shares
WOLVERINE TRADING, LLC New $461.0k1.9k shares
Verition Fund Management LLC New $450.4k1.8k shares
PEAK6 Investments LLC Reduced $375.3k1.5k shares
JANE STREET GROUP, LLC New $350.3k1.4k shares

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
Artisan Partners Limited Partnership 13G · institution +1.9 pts · filed 2026-03-06 10.9% +1.9 pts 8.4m≈ $1.5bn 2026-03-06
WELLINGTON MANAGEMENT GROUP LLP 13G · institution +1.7 pts · filed 2026-05-15 7.7% +1.7 pts 5.9m≈ $1.0bn 2026-05-15
Invesco Ltd. 13G · institution +1.8 pts · filed 2026-08-13 6.9% +1.8 pts 5.3m≈ $914.5m 2026-08-13
FMR LLC 13G · institution +1.4 pts · filed 2026-08-06 6.9% +1.4 pts 5.3m≈ $915.7m 2026-08-06
HARRIS ASSOCIATES L P 13G · institution new · filed 2026-05-15 5.7% new 4.4m≈ $755.9m 2026-05-15

Fell to 5% or below in the last year: ORBIS INVESTMENT MANAGEMENT LTD (0.0%, 2026-05-15)

Insider purchases and sales in Q2 2023

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

None reported in Q2 2023.

Holders, Q2 2023

#ManagerLocationShares Value% of their portfolioChangeShares change
1 MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 0.55% of their portfolio Boston, MA 6,668,9516.7m $1.7bn $1.7bn 0.55% Reduced -1.5m -1,517,005
2 WCM INVESTMENT MANAGEMENT, LLC 4.38% of their portfolio LAGUNA BEACH, CA 5,827,3505.8m $1.5bn $1.5bn 4.38% Added +37.9k +37,903
3 LAZARD ASSET MANAGEMENT LLC 1.06% of their portfolio NEW YORK, NY 3,434,4313.4m $859.3m $859.3m 1.06% Added +456.7k +456,675
4 Boston Partners 1.04% of their portfolio BOSTON, MA 3,100,9893.1m $776.2m $776.2m 1.04% Added +23.7k +23,691
5 FMR LLC 0.06% of their portfolio BOSTON, MA 3,046,7743.0m $762.3m $762.3m 0.06% Reduced -2.8m -2,820,572
6 WELLINGTON MANAGEMENT GROUP LLP 0.13% of their portfolio Boston, MA 2,754,3212.8m $689.1m $689.1m 0.13% Added +392.0k +392,030
7 Ninety One UK Ltd 1.95% of their portfolio London, X0 2,674,1552.7m $669.1m $669.1m 1.95% Added +407.6k +407,617
8 FRANKLIN RESOURCES INC 0.26% of their portfolio San Mateo, CA 2,164,2282.2m $541.5m $541.5m 0.26% Added +22.6k +22,585
9 Capital Research Global Investors 0.14% of their portfolio Los Angeles, CA 2,082,5092.1m $521.0m $521.0m 0.14% Added +340.0k +340,035
10 BlackRock Inc. 0.01% of their portfolio New York, NY 1,873,1451.9m $468.7m $468.7m 0.01% Added +1.5m +1,489,688
11 Invesco Ltd. 0.11% of their portfolio ATLANTA, GA 1,732,1061.7m $433.4m $433.4m 0.11% Added +166.7k +166,665
12 AMERICAN CENTURY COMPANIES INC 0.32% of their portfolio KANSAS CITY, MO 1,678,2991.7m $419.9m $419.9m 0.32% Reduced -263.6k -263,565
13 COMGEST GLOBAL INVESTORS S.A.S. 6.49% of their portfolio Paris, I0 1,552,2621.6m $388.4m $388.4m 6.49% Added +225.0k +225,001
14 FIL Ltd 0.43% of their portfolio HAMILTON, D0 1,513,0881.5m $378.6m $378.6m 0.43% Added +191.4k +191,446
15 ALLIANCEBERNSTEIN L.P. 0.15% of their portfolio NASHVILLE, TN 1,494,4311.5m $373.9m $373.9m 0.15% Reduced -191.0k -190,969
16 POLEN CAPITAL MANAGEMENT LLC 0.91% of their portfolio Boca Raton, FL 1,466,0211.5m $366.8m $366.8m 0.91% Reduced -20.7k -20,693
17 CIBC Private Wealth Group LLC 0.38% of their portfolio ATLANTA, GA 1,407,4101.4m $352.1m $352.1m 0.38% Added +315.8k +315,812
18 Sustainable Growth Advisers, LP 1.66% of their portfolio STAMFORD, CT 1,401,6241.4m $350.7m $350.7m 1.66% Added +388.5k +388,529
19 WESTFIELD CAPITAL MANAGEMENT CO LP 2.19% of their portfolio BOSTON, MA 1,377,4751.4m $344.6m $344.6m 2.19% Added +11.9k +11,903
20 BlueSpruce Investments, LP 4.92% of their portfolio CHICAGO, IL 1,141,9061.1m $285.7m $285.7m 4.92% New
21 Clearbridge Investments, LLC 0.25% of their portfolio NEW YORK, NY 1,106,0231.1m $276.7m $276.7m 0.25% Reduced -331.2k -331,186
22 WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 0.85% of their portfolio CHICAGO, IL 1,059,6561.1m $265.1m $265.1m 0.85% Reduced -288.0k -287,967
23 BANK OF AMERICA CORP /DE/ 0.03% of their portfolio CHARLOTTE, NC 1,004,1141.0m $251.2m $251.2m 0.03% Reduced -99.1k -99,072
24 BAMCO INC /NY/ 0.68% of their portfolio NEW YORK, NY 987,765987.8k $247.1m $247.1m 0.68% Reduced -212 -212
25 STATE STREET CORP 0.01% of their portfolio BOSTON, MA 956,296956.3k $239.3m $239.3m 0.01% Added +818.8k +818,762
26 NEUBERGER BERMAN GROUP LLC 0.20% of their portfolio NEW YORK, NY 887,446887.4k $222.0m $222.0m 0.20% Reduced -31.9k -31,874
27 JANUS HENDERSON GROUP PLC 0.12% of their portfolio LONDON, X0 798,374798.4k $199.8m $199.8m 0.12% Reduced -39.9k -39,872
28 NORGES BANK 0.04% of their portfolio OSLO, Q8 716,087716.1k $179.2m $179.2m 0.04% Reduced -23.3k -23,348
29 Trinity Street Asset Management LLP 19.27% of their portfolio LONDON, X0 694,703694.7k $173.8m $173.8m 19.27% Added +12.4k +12,420
30 GOLDMAN SACHS GROUP INC 0.04% of their portfolio NEW YORK, NY 690,922690.9k $172.9m $172.9m 0.04% Added +38.3k +38,260
31 RENAISSANCE TECHNOLOGIES LLC 0.25% of their portfolio NEW YORK, NY 689,158689.2k $172.4m $172.4m 0.25% Reduced -195.4k -195,425
32 MILLENNIUM MANAGEMENT LLC 0.17% of their portfolio NEW YORK, NY 642,333642.3k $160.7m $160.7m 0.17% Reduced -363.2k -363,151
33 EARNEST PARTNERS LLC 0.84% of their portfolio ATLANTA, GA 597,947597.9k $149.6m $149.6m 0.84% Added +79.6k +79,560
34 WASATCH ADVISORS LP 0.88% of their portfolio SALT LAKE CITY, UT 578,263578.3k $144.7m $144.7m 0.88% Added +984 +984
35 AMERICAN CAPITAL MANAGEMENT INC 4.88% of their portfolio NEW YORK, NY 561,629561.6k $140.5m $140.5m 4.88% Reduced -94.8k -94,812
36 Point72 Asset Management, L.P. 0.47% of their portfolio STAMFORD, CT 537,847537.8k $134.6m $134.6m 0.47% Added +387.2k +387,171
37 NORTHERN TRUST CORP 0.03% of their portfolio CHICAGO, IL 536,584536.6k $134.3m $134.3m 0.03% Added +128.2k +128,241
38 Bank of New York Mellon Corp 0.03% of their portfolio NEW YORK, NY 536,458536.5k $134.2m $134.2m 0.03% Added +121.8k +121,842
39 AustralianSuper Pty Ltd 0.83% of their portfolio MELBOURNE, C3 522,828522.8k $130.8m $130.8m 0.83% Reduced -25.1k -25,101
40 PRINCIPAL FINANCIAL GROUP INC 0.09% of their portfolio DES MOINES, IA 522,467522.5k $130.7m $130.7m 0.09% Added +28.7k +28,723
41 CCLA Investment Management 2.36% of their portfolio LONDON, X0 508,613508.6k $132.3m $132.3m 2.36% Reduced -14.2k -14,225
42 Stephens Investment Management Group LLC 1.86% of their portfolio LITTLE ROCK, AR 475,368475.4k $118.9m $118.9m 1.86% Reduced -3.2k -3,207
43 MORGAN STANLEY 0.01% of their portfolio NEW YORK, NY 462,599462.6k $115.7m $115.7m 0.01% Added +255.7k +255,708
44 Baird Financial Group, Inc. 0.27% of their portfolio MILWAUKEE, WI 402,630402.6k $100.7m $100.7m 0.27% Reduced -2.4k -2,424
45 GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio BOSTON, MA 399,304399.3k $99.9m $99.9m 0.01% Added +324.2k +324,209
46 JPMORGAN CHASE & CO 0.01% of their portfolio NEW YORK, NY 386,372386.4k $96.7m $96.7m 0.01% Added +10.0k +10,015
47 First Pacific Advisors, LP 1.28% of their portfolio EL SEGUNDO, CA 351,000351.0k $87.8m $87.8m 1.28% Reduced -6.9k -6,904
48 Iron Triangle Partners LP 12.00% of their portfolio Cos Cob, CT 350,000350.0k $87.6m $87.6m 12.00% Added +160.0k +160,000
49 MARSHALL WACE, LLP 0.19% of their portfolio LONDON, X0 343,637343.6k $86.0m $86.0m 0.19% Added +338.0k +337,951
50 Grandeur Peak Global Advisors, LLC 5.78% of their portfolio SALT LAKE CITY, UT 338,323338.3k $84.6m $84.6m 5.78% Added +34.3k +34,279
51 Ninety One North America, Inc. 3.50% of their portfolio New York, NY 329,657329.7k $82.5m $82.5m 3.50% Added +58.3k +58,331
52 SEI INVESTMENTS CO 0.13% of their portfolio OAKS, PA 293,797293.8k $73.5m $73.5m 0.13% Reduced -22.2k -22,242
53 ENVESTNET ASSET MANAGEMENT INC 0.03% of their portfolio Berwyn, PA 278,194278.2k $69.6m $69.6m 0.03% Reduced -50.8k -50,764
54 NEW YORK STATE COMMON RETIREMENT FUND 0.09% of their portfolio ALBANY, NY 275,350275.4k $68.9m $68.9m 0.09% Added +85.0k +84,966
55 Legal & General Group Plc 0.02% of their portfolio London, X0 274,352274.4k $68.6m $68.6m 0.02% Reduced -3.8k -3,809
56 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 272,580272.6k $68.2m $68.2m 0.00% Added +99.6k +99,556
57 Holocene Advisors, LP 0.29% of their portfolio New York, NY 268,832268.8k $67.3m $67.3m 0.29% New
58 AMERIPRISE FINANCIAL INC 0.02% of their portfolio MINNEAPOLIS, MN 259,253259.3k $64.9m $64.9m 0.02% Reduced -26.5k -26,525
59 Two Creeks Capital Management, LP 3.67% of their portfolio New York, NY 243,578243.6k $60.9m $60.9m 3.67% New
60 BROWN CAPITAL MANAGEMENT LLC 0.85% of their portfolio BALTIMORE, MD 238,793238.8k $59.7m $59.7m 0.85% Added +3.1k +3,137
61 NATIXIS ADVISORS, LLC 0.18% of their portfolio Boston, MA 237,804237.8k $59.5m $59.5m 0.18% Added +32.6k +32,551
62 PRICE T ROWE ASSOCIATES INC /MD/ 0.01% of their portfolio BALTIMORE, MD 227,841227.8k $57.0m $57.0m 0.01% New
63 TimesSquare Capital Management, LLC 0.79% of their portfolio NEW YORK, NY 220,890220.9k $55.3m $55.3m 0.79% Added +13.3k +13,335
64 PFM Health Sciences, LP 2.15% of their portfolio SAN FRANCISCO, CA 213,559213.6k $53.4m $53.4m 2.15% Added +149.1k +149,142
65 Amundi 0.03% of their portfolio Paris, I0 209,129209.1k $50.8m $50.8m 0.03% Added +23.2k +23,194
66 RAYMOND JAMES & ASSOCIATES 0.04% of their portfolio ST PETERSBURG, FL 207,877207.9k $52.0m $52.0m 0.04% Reduced -20.6k -20,622
67 STEADFAST CAPITAL MANAGEMENT LP 1.26% of their portfolio NEW YORK, NY 188,529188.5k $47.2m $47.2m 1.26% Reduced -211.4k -211,353
68 Eagle Health Investments LP 8.71% of their portfolio Greenwich, CT 186,200186.2k $46.6m $46.6m 8.71% Added +30.3k +30,300
69 Allspring Global Investments Holdings, LLC 0.07% of their portfolio CHARLOTTE, NC 175,864175.9k $44.0m $44.0m 0.07% Added +111.9k +111,887
70 Montanaro Asset Management Ltd 6.68% of their portfolio LONDON, X0 168,900168.9k $42.3m $42.3m 6.68% Reduced -10.5k -10,500
71 Nuveen Asset Management, LLC 0.01% of their portfolio CHICAGO, IL 161,878161.9k $40.5m $40.5m 0.01% New
72 California Public Employees Retirement System 0.03% of their portfolio Sacramento, CA 149,666149.7k $37.4m $37.4m 0.03% Reduced -7.1k -7,130
73 THORNBURG INVESTMENT MANAGEMENT INC 0.61% of their portfolio SANTA FE, NM 149,534149.5k $37.4m $37.4m 0.61% Reduced -7.2k -7,244
74 ROYAL BANK OF CANADA 0.01% of their portfolio TORONTO, A6 149,231149.2k $37.3m $37.3m 0.01% Reduced -3.3k -3,313
75 Magnetar Financial LLC 0.80% of their portfolio EVANSTON, IL 144,955145.0k $36.3m $36.3m 0.80% Reduced -5.5k -5,525
76 Clark Capital Management Group, Inc. 0.32% of their portfolio PHILADELPHIA, PA 142,272142.3k $35.6m $35.6m 0.32% Added +3.0k +3,037
77 TD Asset Management Inc 0.04% of their portfolio Toronto, A6 138,842138.8k $34.7m $34.7m 0.04% Added +7.0k +7,007
78 WELLS FARGO & COMPANY/MN 0.01% of their portfolio SAN FRANCISCO, CA 138,521138.5k $34.7m $34.7m 0.01% Reduced -41.6k -41,594
79 CANADA PENSION PLAN INVESTMENT BOARD 0.05% of their portfolio TORONTO ONTARIO, A6 137,542137.5k $34.4m $34.4m 0.05% Added +9.4k +9,400
80 AXIOM INVESTORS LLC /DE 0.50% of their portfolio GREENWICH, CT 135,543135.5k $33.9m $33.9m 0.50% Added +35.2k +35,152
81 Aberdeen Group plc 0.07% of their portfolio EDINBURGH, X0 128,033128.0k $32.0m $32.0m 0.07% Added +1.2k +1,175
82 Corient Private Wealth LP 0.07% of their portfolio MIAMI, FL 116,384116.4k $29.1m $29.1m 0.07% Added +55.6k +55,637
83 State of Tennessee, Department of Treasury 0.12% of their portfolio NASHVILLE, TN 110,747110.7k $27.7m $27.7m 0.12% Added +2.6k +2,605
84 CITADEL ADVISORS LLC 0.03% of their portfolio MIAMI, FL 110,646110.6k $27.7m $27.7m 0.03% Added +102.2k +102,163
85 ALTA CAPITAL MANAGEMENT LLC/ 1.86% of their portfolio SALT LAKE CITY, UT 108,561108.6k $27.2m $27.2m 1.86% Reduced -877 -877
86 Fiera Capital Corp 0.08% of their portfolio MONTREAL, A8 107,369107.4k $26.9m $26.9m 0.08% Reduced -2.3k -2,313
87 WILSON ASSET MANAGEMENT (INTERNATIONAL) PTY LTD 7.26% of their portfolio SYDNEY, C3 106,434106.4k $26.6m $26.6m 7.26% Added +25.3k +25,294
88 Employees Retirement System of Texas 0.36% of their portfolio AUSTIN, TX 105,000105.0k $26.3m $26.3m 0.36% Reduced -14.0k -13,982
89 RHUMBLINE ADVISERS 0.03% of their portfolio BOSTON, MA 99,82299.8k $25.0m $25.0m 0.03% Added +98.4k +98,361
90 FACT Capital, LP 11.62% of their portfolio NEW YORK, NY 99,68599.7k $24.9m $24.9m 11.62% Unchanged
91 Summit Creek Advisors LLC 2.85% of their portfolio MINNEAPOLIS, MN 91,12591.1k $22.8m $22.8m 2.85% Added +95 +95
92 PEREGRINE CAPITAL MANAGEMENT LLC 0.61% of their portfolio MINNEAPOLIS, MN 90,07690.1k $22.5m $22.5m 0.61% Reduced -127 -127
93 Polar Capital Holdings Plc 0.15% of their portfolio London, X0 88,79588.8k $22.2m $22.2m 0.15% Added +1.4k +1,445
94 LPL Financial LLC 0.02% of their portfolio FORT MILL, SC 87,50487.5k $21.9m $21.9m 0.02% Reduced -7.5k -7,518
95 LOOMIS SAYLES & CO L P 0.04% of their portfolio BOSTON, MA 87,23487.2k $21.8m $21.8m 0.04% Reduced -1.5k -1,464
96 Artemis Investment Management LLP 0.28% of their portfolio EDINBURGH, X0 86,47086.5k $21.6m $21.6m 0.28% Added +22.5k +22,495
97 VAN ECK ASSOCIATES CORP 0.05% of their portfolio NEW YORK, NY 85,67885.7k $21.4m $21.4m 0.05% Added +327 +327
98 Motley Fool Asset Management LLC 1.90% of their portfolio ALEXANDRIA, VA 85,24485.2k $21.3m $21.3m 1.90% Added +19.1k +19,144
99 TODD ASSET MANAGEMENT LLC 0.48% of their portfolio Louisville, KY 82,09582.1k $20.5m $20.5m 0.48% Reduced -59.0k -59,010
100 PALISADE CAPITAL MANAGEMENT, LP 0.51% of their portfolio FORT LEE, NJ 77,33977.3k $19.4m $19.4m 0.51% Added +2.4k +2,447