Arch Capital director sells Series G depositary shares

ARCH CAPITAL GROUP LTD. director Brian S. Posner reported an open-market sale of 2,000 Depositary Shares, Series G, on 2026-05-11 at a weighted average price of $17.1415 per share.

Rhea-AI Filing Summary

ARCH CAPITAL GROUP LTD. director Brian S. Posner reported an open-market sale of 2,000 Depositary Shares, Series G, on 2026-05-11 at a weighted average price of $17.1415 per share. Each Depositary Share represents a 1/1,000th interest in a Series G Non-Cumulative Preferred Share. Following this transaction, his direct holdings of these Depositary Shares were reduced to zero, indicating a full exit from this specific security class.

Insider Trade Summary

Net Seller: 2,000 shares

Net Sell 1 txn

Insider Posner Brian S

Role Director

Sold 2,000 shs ($34K)

Type	Security	Shares	Price	Value
Sale	Depositary Shares, Series G	2,000	$17.1415	$34K

Holdings After Transaction: Depositary Shares, Series G — 0 shares (Direct)

Footnotes (2)

1. F1. Each Depositary Share Represents 1/1,000th interest in a Series G Non-Cumulative Preferred Share.
2. F2. The price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $17.14 to $17.17. Upon request, the full information regarding the number of shares sold at each separate price within the range will be provided to the issuer, any security holder of the issuer or the staff of the Securities Exchange Commission.

Key Figures

Shares sold: 2,000 Depositary Shares, Series G Weighted average sale price: $17.1415 per Depositary Share Holdings after transaction: 0 Depositary Shares, Series G +1 more

4 metrics

Shares sold 2,000 Depositary Shares, Series G Open-market sale on 2026-05-11

Weighted average sale price $17.1415 per Depositary Share Sale range $17.14 to $17.17

Holdings after transaction 0 Depositary Shares, Series G Total direct shares following sale

Depositary share ratio 1/1,000th of a Series G Preferred Share Interest represented by each Depositary Share

Key Terms

Depositary Shares, Series G, Series G Non-Cumulative Preferred Share, weighted average sale price, open-market sale

4 terms

Depositary Shares, Series G financial

"reported an open-market sale of 2,000 Depositary Shares, Series G, on"

Series G Non-Cumulative Preferred Share financial

"represents a 1/1,000th interest in a Series G Non-Cumulative Preferred Share"

weighted average sale price financial

"The price reported is a weighted average sale price. These shares were sold"

open-market sale financial

"reported an open-market sale of 2,000 Depositary Shares, Series G"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did ARCH CAPITAL GROUP (ACGL) report for Brian S. Posner?

ARCH CAPITAL GROUP director Brian S. Posner reported selling 2,000 Depositary Shares, Series G, in an open-market transaction. The sale was executed at a weighted average price of $17.1415 per share and completely eliminated his direct holdings of this security.

What security did the ARCH CAPITAL (ACGL) director sell in this Form 4 filing?

The director sold Depositary Shares, Series G, of ARCH CAPITAL GROUP. Each Depositary Share represents a 1/1,000th interest in a Series G Non-Cumulative Preferred Share, giving investors fractional exposure to that preferred stock rather than owning whole preferred shares directly.

How many ARCH CAPITAL (ACGL) Series G Depositary Shares were sold and at what price?

The filing shows a sale of 2,000 Series G Depositary Shares at a weighted average price of $17.1415. The shares were sold in multiple trades within a narrow range between $17.14 and $17.17, according to the disclosure footnote in the transaction details.

Did the ARCH CAPITAL (ACGL) director retain any Series G Depositary Shares after the sale?

No, the director reported holding zero Series G Depositary Shares after the transaction. The Form 4 states that total shares following the transaction were 0.0000, indicating this sale closed out his direct position in that specific preferred-related security.

What does the weighted average sale price mean in the ACGL Form 4 filing?

The weighted average sale price of $17.1415 reflects multiple trades executed between $17.14 and $17.17. Rather than listing each individual trade, the filing reports a single blended price; detailed trade breakdowns are available upon request to the issuer or regulators.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/12/2026 - 04:32 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Posner Brian S

(Last) (First) (Middle)

WATERLOO HOUSE, GROUND FLOOR

100 PITTS BAY ROAD

(Street)

PEMBROKE HM 08

(City) (State) (Zip)

BERMUDA

(Country)

2. Issuer Name and Ticker or Trading Symbol
ARCH CAPITAL GROUP LTD. [ ACGL ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/11/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Depositary Shares, Series G(1)	05/11/2026		S		2,000	D	$17.1415(2)	0	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Each Depositary Share Represents 1/1,000th interest in a Series G Non-Cumulative Preferred Share.

2. The price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $17.14 to $17.17. Upon request, the full information regarding the number of shares sold at each separate price within the range will be provided to the issuer, any security holder of the issuer or the staff of the Securities Exchange Commission.

Remarks:

	/s/ Brian S. Posner	05/12/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)