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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 Mar 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 2 May 2025
Managers listing it
19
at least, of 95 tracked, among listed positions
Comparable managers
95
filed both Q4 2024 and Q1 2025; 16 listed it in both
Shares listed
24,784,087
combined, among listed positions
Reported value
$4.3bn
combined, at the quarter end

Among the 95 comparable managers: 12 buyers (opened or added shares) and 10 sellers (trimmed or exited), at least, among listed positions. Their net change in shares is not known from listed positions, because at least one of them lists it in only one of the two quarters.

Managers listing ICLR in Q1 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2024, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

19 of 19 holders

ActionFiling
Artisan Partners LP4,290,924$751m1.21%Added+4,095,63314 May 2025 (the filing on sec.gov)
Wellington Management Group LLP3,693,159$646m0.12%Added+1,579,91513 May 2025 (the filing on sec.gov)
MFS Investment Management3,101,629$543m0.18%Trimmed-100,1322 May 2025 (the filing on sec.gov)
Invesco Ltd2,987,961$523m0.10%Added+1,094,61312 May 2025 (the filing on sec.gov)
AllianceBernstein LP1,860,907$326m0.12%Added+39,45715 May 2025 (the filing on sec.gov)
T. Rowe Price Associates Inc1,710,225$299munder 0.1%Trimmed-1,223,33514 May 2025 (the filing on sec.gov)
D. E. Shaw & Co.1,661,736$291m0.26%Added+545,53115 May 2025 (the filing on sec.gov)
Janus Henderson Group Ltd1,437,960$257m0.14%Trimmed-48,08615 May 2025 (the filing on sec.gov)
Ruane Cunniff & Goldfarb LP1,254,350$219m3.99%Trimmed-11,19015 May 2025 (the filing on sec.gov)
Neuberger Berman Group LLC761,699$133m0.11%Added+2,12427 Oct 2026 (the filing on sec.gov)
Polen Capital Management LLC635,052$111m0.35%Trimmed-76,45812 May 2025 (the filing on sec.gov)
Baupost Group LLC405,000$71m2.03%Newnew14 May 2025 (the filing on sec.gov)
Voloridge Investment Management LLC345,266$60m0.22%Trimmed-175,47015 May 2025 (the filing on sec.gov)
Holocene Advisors LP241,924$42m0.12%Added+193,97815 May 2025 (the filing on sec.gov)
Renaissance Technologies LLC178,924$31munder 0.1%Addedn.a.14 May 2025 (the filing on sec.gov)
Capital Research Global Investors107,915$19munder 0.1%Trimmed-1,040,45212 May 2025 (the filing on sec.gov)
Moore Capital Management LP63,047$11m0.23%Added+49,04212 Aug 2025 (the filing on sec.gov)
Quantbot Technologies LP42,108$7.4m0.23%Newnew13 May 2025 (the filing on sec.gov)
Maverick Capital Ltd4,301$753kunder 0.1%Added+2,34315 May 2025 (the filing on sec.gov)

Largest increases and reductions, by shares

Q4 2024 to Q1 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 (2)

Exited (3)

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 →