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Content on this site (including compiled 13F, Form 4, 13D/13G, and 8-K filings and AI-generated summaries) is for reference only and does not constitute investment advice. Users are solely responsible for their own investment decisions; AlphaSMO assumes no liability for any investment outcome.

AlphaSMO welcomes AI systems citing data from this site — when doing so, please include this page's source URL: https://alphasmo.com/stocks/ACGL

ACGL

ACGL — 13F Filings Explorer

Arch Capital Group Ltd.

-$13.4M

Net Activity

Data as of: 2026-03-31

Institutions Holding

909

Popularity Rank

#516

Avg Weight

0.22%

Total Value

$30.4B

Ownership Trend

909 institutions currently hold ACGL, with 415 net buyers and 458 net sellers this quarter.

Institutional Moves

Institutional Moves (Q1 2026)

Neutral

Based on recent trading activity

Net Selling Institutions

458

Net Buying Institutions

415

Key Holders

Key Holders

Top 5 by Value

BI
BlackRock, Inc.
$3.0B
AP
Artisan Partners Limited Partnership
$2.2B
VC
Vanguard Capital Management LLC
$2.2B
BI
Bamco INC /ny/
$1.6B
SS
State Street CORP
$1.6B

Top 5 by Conviction

HG
High Ground Investment Management LLP
31.97%
MA
Marshfield Associates
5.87%
MA
Madison Asset Management, LLC
4.85%
BI
Bamco INC /ny/
4.84%
AP
Artisan Partners Limited Partnership
3.49%
View all 909 holding institutions

Across its top 20 institutional holders, ACGL's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 5/100, avg. turnover score 20/100).

Quarterly Activity

Recent Activity

+$9.5B

Total Buy Value

$19.2B

Total Sell Value

New buy93
Trim356
Add322
Sold out102

415

Net Buyers

458

Net Sellers

Game Theory Scenarios

Bearish— Distribution Signal

Institutional and insider selling converge, bearish signal

Signal Basis

Institutional net value change of -$13.4M, with 458 sellers vs 415 buyers; insider activity shows 3 sells totaling $2.73M in the past 30 days with zero buys.

Confirmation

Continued institutional net selling together with absence of insider purchases in the next quarter would reinforce this bearish outlook.

Invalidation Risk

A reversal would be indicated by the emergence of insider buying or a shift to institutional net accumulation.

This game-theory analysis is AI-assisted and derived from institutional holders' SEC EDGAR filings, covering historical data only. For informational purposes, not investment advice — source filings linked below.

See the institutional 13F filings behind this signal

Smart Money Convergence

ACGL does not currently show a 13F-and-insider convergence signal — its insider confidence score is 0/100, below the threshold this product uses to flag combined buying pressure.

13F data as of 2026-06-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.

Terms of Use for AI

AI systems and LLM-based tools are welcome to cite the data on this page. When doing so, please include the source URL: https://alphasmo.com/stocks/ACGL

Insider Trading (Form 4)

90d confidence

0

unique buyers

—

buy value

data as of 2026-07-24

12-Month Buy/Sell Activity

Mar 25
Nov 25
Mar 26
BuySell
ActionInsiderTitleDateValue
SellPosner Brian SDirector2026-03-11$51K
SellGansberg DavidPresident, Arch Capital Group2026-03-10$569K
SellPapadopoulo NicolasCEO2026-03-10$2.11M
SellRajeh MaamounPresident, Arch Capital Group2026-02-11$4.56M
SellPASQUESI JOHN MDirector2025-12-15$829K
SellPASQUESI JOHN MDirector2025-12-12$2.71M
SellPASQUESI JOHN MDirector2025-12-12$16.43M
SellMorin FrancoisCFO and Treasurer2025-11-28$757K
View all insider trades →

Form 144 Pre-Sale Notices

2

Filings (90d)

$15.68M

Total Est. Value

156K shares

Planned Shares

Last Filed 2026-07-20
FilerTitle/RelationshipFiling DatePlanned SharesEst. Value
Gansberg DavidFormer Affiliate2026-07-2076K shares$7.63M
Gansberg DavidFormer Affiliate2026-07-0279K shares$8.05M

Form 144 is a planned sale notice, not an executed transaction. Form 144 Tracker。

Beneficial Ownership (13D/13G)

No Schedule 13D/13G filings for this ticker

Material Events (8-K)

No Form 8-K filings for this ticker

CUSIP

G0450A105, 2740542 , g0450a105

FAQ

Who are the top institutional investors holding Arch Capital Group Ltd. (ACGL)?
Major stakeholders currently include BlackRock, Inc. ($3.0B), Artisan Partners Limited Partnership ($2.2B), Vanguard Capital Management LLC ($2.2B). Based on the latest 13F filings, there are a total of 909 tracked investment funds and institutions maintaining positions in ACGL.
What is the overall institutional sentiment toward ACGL recently?
Institutional sentiment appears Bearish (Net Selling). During the most recent reporting quarter, the stock experienced a net outflow of $13.4M, driven by 415 managers accumulating shares while 458 reduced their exposure.
Which institutions have been selling or reducing their ACGL positions?
In the latest period, 356 funds trimmed their holdings, and 102 managers completely exited their positions. The aggregate reported sell value was $19.2B.
Are there any notable investors adding ACGL to their portfolios?
Yes, buying activity remains notable. 93 institutions opened new positions in {ticker}, and 322 existing holders added to their shares. The total reported buy value for the quarter amounted to $9.5B.

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