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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 2024
the date the book describes
Filed
5 Nov 2026
latest of these filings; the earliest 10 May 2024
Managers listing it
21
at least, of 95 tracked, among listed positions
Comparable managers
93
filed both Q4 2023 and Q1 2024; 15 listed it in both
Shares listed
23,857,643
combined, among listed positions
Reported value
$8.0bn
combined, at the quarter end

Among the 93 comparable managers: 11 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 2024

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2023, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

21 of 21 holders

ActionFiling
MFS Investment Management5,313,457$1.8bn0.53%Trimmed-219,21914 May 2024 (the filing on sec.gov)
Wellington Management Group LLP3,217,442$1.1bn0.19%Trimmed-209,97315 May 2024 (the filing on sec.gov)
Fidelity (FMR LLC)2,302,310$773m0.05%Trimmed-722,9745 Nov 2026 (the filing on sec.gov)
Capital Research Global Investors2,200,417$739m0.17%Trimmed-353,25614 May 2024 (the filing on sec.gov)
Invesco Ltd1,840,033$618m0.13%Trimmed-125,86914 May 2024 (the filing on sec.gov)
T. Rowe Price Associates Inc1,743,683$586m0.07%Added+218,80315 May 2024 (the filing on sec.gov)
AllianceBernstein LP1,474,610$495m0.18%Trimmed-62,30314 May 2024 (the filing on sec.gov)
Janus Henderson Group Ltd1,176,749$395m0.22%Added+333,39315 May 2024 (the filing on sec.gov)
Polen Capital Management LLC1,098,219$369m0.85%Trimmed-93,95110 May 2024 (the filing on sec.gov)
Citadel Advisors LLC886,207$298m0.06%Added+24,52815 May 2024 (the filing on sec.gov)
Neuberger Berman Group LLC792,442$266m0.22%Trimmed-65,31014 Nov 2024 (the filing on sec.gov)
Millennium Management LLC603,276$203m0.09%Trimmed-74,54915 May 2024 (the filing on sec.gov)
Renaissance Technologies LLC271,058$91m0.14%Trimmed-95,70013 May 2024 (the filing on sec.gov)
D. E. Shaw & Co.186,207$63m0.05%Addedn.a.15 May 2024 (the filing on sec.gov)
Farallon Capital Management LLC179,700$60m0.26%Newnew24 May 2024 (the filing on sec.gov)
Woodline Partners LP153,962$52m0.48%Newnew15 May 2024 (the filing on sec.gov)
Marshall Wace LLP139,768$47m0.07%Added+18,34615 May 2024 (the filing on sec.gov)
Point72 Asset Management LP100,108$34m0.08%Newnew15 May 2024 (the filing on sec.gov)
Arrowstreet Capital LP81,733$27munder 0.1%Newnew15 May 2024 (the filing on sec.gov)
Walleye Capital LLC74,587$25munder 0.1%Addedn.a.15 May 2024 (the filing on sec.gov)
ExodusPoint Capital Management LP21,675$7.3m0.06%Added+6,89414 May 2024 (the filing on sec.gov)

Largest increases and reductions, by shares

Q4 2023 to Q1 2024, 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 (4)

Exited (0)

No exit shown by a manager’s own filing.

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 →