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ACGL in the 13F filings

Arch Cap Group LTD · CUSIP G0450A105

Sector · InsuranceTheme · Financial services· 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 10 Feb 2026
Managers listing it
31
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 12 listed it in both
Shares listed
41,176,443
combined, among listed positions
Reported value
$3.9bn
combined, at the quarter end

Among the 92 comparable managers: 17 buyers (opened or added shares) and 18 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -1,617,736.

Managers listing ACGL 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.

31 of 31 holders

ActionFiling
Artisan Partners LP23,247,700$2.2bn3.34%Trimmed-390,40617 Feb 2026 (the filing on sec.gov)
Invesco Ltd3,861,473$370munder 0.1%Trimmed-203,88319 Feb 2026 (the filing on sec.gov)
AQR Capital Management LLC2,670,628$256m0.13%Added+1,730,48717 Feb 2026 (the filing on sec.gov)
Two Sigma Investments LP1,762,575$169m0.24%Trimmed-132,64717 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)1,622,133$156munder 0.1%Added+373,20317 Feb 2026 (the filing on sec.gov)
Arrowstreet Capital LP1,268,601$122m0.07%Added+1,080,04913 Feb 2026 (the filing on sec.gov)
Wellington Management Group LLP994,528$95munder 0.1%Added+965,47317 Feb 2026 (the filing on sec.gov)
Millennium Management LLC712,237$68munder 0.1%Trimmed-209,70117 Feb 2026 (the filing on sec.gov)
Two Sigma Advisers LP688,900$66m0.13%Trimmed-410,10017 Feb 2026 (the filing on sec.gov)
Man Group PLC577,684$55m0.09%Trimmed-255,67217 Feb 2026 (the filing on sec.gov)
Jane Street Group LLC553,079$53munder 0.1%Added+407,40312 Feb 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc524,254$50munder 0.1%Trimmed-89,73817 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP494,068$47munder 0.1%Added+26,18217 Feb 2026 (the filing on sec.gov)
Bridgewater Associates LP383,022$37m0.13%Added+65,32813 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC372,530$36munder 0.1%Added+264,77317 Feb 2026 (the filing on sec.gov)
D. E. Shaw & Co.366,917$35munder 0.1%Trimmed-246,51917 Feb 2026 (the filing on sec.gov)
Susquehanna International Group LLP324,267$31munder 0.1%Added+241,68217 Feb 2026 (the filing on sec.gov)
Acadian Asset Management LLC272,203$26munder 0.1%Added+125,38610 Feb 2026 (the filing on sec.gov)
Tudor Investment Corp109,866$11munder 0.1%Added+4,27817 Feb 2026 (the filing on sec.gov)
Squarepoint Ops LLC71,042$6.8munder 0.1%Trimmed-17,20613 Feb 2026 (the filing on sec.gov)
Neuberger Berman Group LLC66,046$6.3munder 0.1%Trimmed-47,49227 Oct 2026 (the filing on sec.gov)
Quantbot Technologies LP57,548$5.5m0.18%Added+29,21710 Feb 2026 (the filing on sec.gov)
Janus Henderson Group Ltd41,884$4.0munder 0.1%Added+70917 Feb 2026 (the filing on sec.gov)
Walleye Capital LLC37,942$3.6munder 0.1%Added+32,11613 Feb 2026 (the filing on sec.gov)
Voloridge Investment Management LLC28,427$2.7munder 0.1%Trimmed-271,68517 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 (2)

Exited (4)

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.
12 in Q3 2024 to 8 in Q2 2026

Tracked managers listing it, at least.

051015202014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
ACGL by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20133$1.2bnn.a.n.a.
Q3 20134$1.2bnn.a.n.a.
Q4 20133$1.3bnn.a.n.a.
Q1 20143$1.3bnn.a.n.a.
Q2 20144$1.3bnn.a.n.a.
Q3 20147$1.4bnn.a.n.a.
Q4 20147$1.5bnn.a.n.a.
Q1 20156$1.5bnn.a.n.a.
Q2 20155$1.5bnn.a.n.a.
Q3 20156$1.8bnn.a.n.a.
Q4 20157$1.6bnn.a.n.a.
Q1 20166$1.5bnn.a.n.a.
Q2 201610$1.6bnn.a.n.a.
Q3 20167$1.6bnn.a.n.a.
Q4 20169$1.8bnn.a.n.a.
Q1 20178$1.9bnn.a.n.a.
Q2 201716$2.3bnn.a.n.a.
Q3 201711$3.0bnn.a.n.a.
Q4 201710$2.9bnn.a.n.a.
Q1 201814$2.9bnn.a.n.a.
Q2 201810$2.6bnn.a.n.a.
Q3 20189$2.4bnn.a.n.a.
Q4 20188$2.1bnn.a.n.a.
Q1 20198$2.6bnn.a.n.a.
Q2 201912$2.8bnn.a.n.a.
Q3 201911$3.0bnn.a.n.a.
Q4 20199$3.0bnn.a.n.a.
Q1 202016$2.0bnn.a.n.a.
Q2 202016$2.1bnn.a.n.a.
Q3 202014$2.2bnn.a.n.a.
Q4 202010$2.5bnn.a.n.a.
Q1 202114$2.9bnn.a.n.a.
Q2 20218$2.7bnn.a.n.a.
Q3 20217$2.6bnn.a.n.a.
Q4 20217$3.0bnn.a.n.a.
Q1 202210$3.2bnn.a.n.a.
Q2 202210$3.4bnn.a.n.a.
Q3 202211$3.8bnn.a.n.a.
Q4 20229$4.7bnn.a.n.a.
Q1 202310$4.0bnn.a.n.a.
Q2 202310$4.1bnn.a.n.a.
Q3 20239$4.1bnn.a.n.a.
Q4 202314$3.6bn104
Q1 202416$4.0bn89
Q2 202411$4.3bn56
Q3 202412$4.4bn58
Q4 20249$3.5bn38
Q1 202513$3.5bn85
Q2 202513$3.4bn104
Q3 202514$3.4bn86
Q4 202512$3.3bn1718
Q1 202611$3.3bn1122
Q2 20268$3.2bn1415

Compare with…

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

ACGL and V →ACGL and AXP →ACGL and BAC →Choose a stock to compare with ACGL →

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 ACGL, latest filings →Back to the 13F Explorer →