L3VLUP
ProSign in

ICLR in the 13F filings

Icon Pub LTD Co · CUSIP G4705A100

Sector · Health care services and researchTheme · Healthcare: biopharma and medtech· L3VLUP-defined
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023
Quarter end
31 Dec 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 22 Jan 2026
Managers listing it
28
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 19 listed it in both
Shares listed
29,440,591
combined, among listed positions
Reported value
$5.4bn
combined, at the quarter end

Among the 92 comparable managers: 12 buyers (opened or added shares) and 20 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -1,548,218.

Managers listing ICLR in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

28 of 28 holders

ActionFiling
Artisan Partners LP6,873,977$1.3bn1.88%Trimmed-197,38317 Feb 2026 (the filing on sec.gov)
Wellington Management Group LLP4,350,750$793m0.14%Trimmed-286,38717 Feb 2026 (the filing on sec.gov)
Invesco Ltd3,756,896$685m0.06%Added+329,26619 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)3,097,895$564munder 0.1%Added+1,164,65717 Feb 2026 (the filing on sec.gov)
Harris Associates LP2,510,166$457m0.58%Added+167,60717 Feb 2026 (the filing on sec.gov)
MFS Investment Management2,357,033$429m0.14%Trimmed-1,146,52022 Jan 2026 (the filing on sec.gov)
Ruane Cunniff & Goldfarb LP1,679,590$306m4.78%Trimmed-21,40413 Feb 2026 (the filing on sec.gov)
Capital World Investors1,496,479$273munder 0.1%Added+1,268,09511 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP1,272,462$232m0.07%Trimmed-101,61217 Feb 2026 (the filing on sec.gov)
D. E. Shaw & Co.653,319$119m0.07%Trimmed-823,78217 Feb 2026 (the filing on sec.gov)
Janus Henderson Group Ltd248,279$45munder 0.1%Added+28,00817 Feb 2026 (the filing on sec.gov)
Point72 Asset Management LP194,150$35munder 0.1%Trimmed-267,89817 Feb 2026 (the filing on sec.gov)
Holocene Advisors LP161,983$30m0.06%Trimmed-230,52317 Feb 2026 (the filing on sec.gov)
Neuberger Berman Group LLC160,822$29munder 0.1%Trimmed-18,29227 Oct 2026 (the filing on sec.gov)
Walleye Capital LLC134,281$24m0.08%Added+45,16513 Feb 2026 (the filing on sec.gov)
Hudson Bay Capital Management LP114,000$21m0.07%Held013 Feb 2026 (the filing on sec.gov)
Polen Capital Management LLC105,206$19m0.08%Trimmed-338,25512 Feb 2026 (the filing on sec.gov)
Balyasny Asset Management LLC75,528$14munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Moore Capital Management LP57,190$10m0.15%Added+28,11617 Feb 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP48,055$8.8m0.07%Trimmed-5617 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC41,965$7.6munder 0.1%Trimmed-228,01417 Feb 2026 (the filing on sec.gov)
Two Sigma Investments LP28,900$5.3munder 0.1%Trimmed-6117 Feb 2026 (the filing on sec.gov)
Verition Fund Management LLC12,001$2.2munder 0.1%Added+40113 Feb 2026 (the filing on sec.gov)
Jane Street Group LLC3,008$548kunder 0.1%Added+84212 Feb 2026 (the filing on sec.gov)
Voloridge Investment Management LLC2,961$540kunder 0.1%Trimmed-100,63417 Feb 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q3 2025 to Q4 2025, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (3)

Exited (6)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
20 in Q3 2024 to 15 in Q2 2026

Tracked managers listing it, at least.

01020302014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
ICLR by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20136$394mn.a.n.a.
Q3 20137$436mn.a.n.a.
Q4 201310$454mn.a.n.a.
Q1 201412$528mn.a.n.a.
Q2 20148$465mn.a.n.a.
Q3 201410$687mn.a.n.a.
Q4 20149$502mn.a.n.a.
Q1 20159$809mn.a.n.a.
Q2 20158$825mn.a.n.a.
Q3 201510$827mn.a.n.a.
Q4 20156$847mn.a.n.a.
Q1 20165$773mn.a.n.a.
Q2 20168$905mn.a.n.a.
Q3 20169$1.1bnn.a.n.a.
Q4 20167$885mn.a.n.a.
Q1 201711$1.1bnn.a.n.a.
Q2 201712$1.3bnn.a.n.a.
Q3 201712$1.5bnn.a.n.a.
Q4 201712$1.5bnn.a.n.a.
Q1 201811$1.6bnn.a.n.a.
Q2 201811$1.9bnn.a.n.a.
Q3 201811$2.2bnn.a.n.a.
Q4 201812$1.8bnn.a.n.a.
Q1 201916$2.1bnn.a.n.a.
Q2 201917$2.4bnn.a.n.a.
Q3 201912$2.2bnn.a.n.a.
Q4 201914$2.7bnn.a.n.a.
Q1 202013$2.0bnn.a.n.a.
Q2 202011$2.6bnn.a.n.a.
Q3 202012$3.0bnn.a.n.a.
Q4 202011$3.1bnn.a.n.a.
Q1 202114$3.0bnn.a.n.a.
Q2 202121$4.2bnn.a.n.a.
Q3 202118$6.7bnn.a.n.a.
Q4 202117$8.3bnn.a.n.a.
Q1 202217$5.6bnn.a.n.a.
Q2 202215$5.0bnn.a.n.a.
Q3 202212$4.3bnn.a.n.a.
Q4 202216$4.5bnn.a.n.a.
Q1 202316$5.3bnn.a.n.a.
Q2 202317$5.9bnn.a.n.a.
Q3 202316$6.0bnn.a.n.a.
Q4 202318$6.6bn911
Q1 202421$8.0bn1110
Q2 202424$7.7bn1312
Q3 202420$6.6bn1011
Q4 202422$4.4bn157
Q1 202519$4.3bn1210
Q2 202526$4.9bn168
Q3 202521$4.9bn817
Q4 202518$5.3bn1220
Q1 202616$3.8bn2313
Q2 202615$6.5bn1916

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

ICLR and LLY →ICLR and JNJ →ICLR and VRTX →Choose a stock to compare with ICLR →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own ICLR, latest filings →Back to the 13F Explorer →