Arch Capital director sells 3,000 Series F shares

ARCH CAPITAL GROUP LTD. director Brian S. Posner reported an open-market sale of 3,000 Depositary Shares, Series F, at a weighted average price of $19.66 per share.

Rhea-AI Filing Summary

ARCH CAPITAL GROUP LTD. director Brian S. Posner reported an open-market sale of 3,000 Depositary Shares, Series F, at a weighted average price of $19.66 per share. Each Depositary Share represents a 1/1,000th interest in a Series F Non-Cumulative Preferred Share, and this sale reduced his reported holdings of these Depositary Shares to zero.

Insider Trade Summary

Net Seller: 3,000 shares

Net Sell 1 txn

Insider Posner Brian S

Role Director

Sold 3,000 shs ($59K)

Type	Security	Shares	Price	Value
Sale	Depositary Shares, Series F	3,000	$19.66	$59K

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

Footnotes (2)

1. F1. Each Depositary Share Represents 1/1,000th interest in a Series F 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 $19.57 to $19.80. 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

Depositary Shares sold: 3,000 shares Weighted average sale price: $19.66 per share Price range of trades: $19.57–$19.80 per share +2 more

5 metrics

Depositary Shares sold 3,000 shares Depositary Shares, Series F, sold in open market

Weighted average sale price $19.66 per share Open-market sale of Depositary Shares, Series F

Price range of trades $19.57–$19.80 per share Range of individual sale transactions for Depositary Shares

Holdings after transaction 0 Depositary Shares, Series F Direct ownership reported following sale

Preferred share interest per Depositary Share 1/1,000th of a Series F Preferred Share Each Depositary Share’s interest in Non-Cumulative Preferred Share

Key Terms

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

4 terms

Depositary Shares, Series F financial

"security_title: "Depositary Shares, Series F""

Non-Cumulative Preferred Share financial

"interest in a Series F Non-Cumulative Preferred Share"

weighted average sale price financial

"The price reported is a weighted average sale price."

open-market sale financial

"transaction_action: "open-market sale""

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 LTD. (ACGL) disclose on this Form 4?

ARCH CAPITAL GROUP LTD. disclosed that director Brian S. Posner sold 3,000 Depositary Shares, Series F, in an open-market transaction at a weighted average price of $19.66 per share, fully exiting his reported position in these Depositary Shares.

What security did Brian S. Posner sell in ARCH CAPITAL GROUP LTD. (ACGL)?

Brian S. Posner sold Depositary Shares, Series F, of ARCH CAPITAL GROUP LTD. Each Depositary Share represents a 1/1,000th interest in a Series F Non-Cumulative Preferred Share, meaning the transaction involved preferred-share-linked securities rather than common stock.

How many ARCH CAPITAL GROUP LTD. (ACGL) Depositary Shares, Series F, were sold and at what price?

The filing reports that 3,000 Depositary Shares, Series F, were sold at a weighted average price of $19.66 per share. The shares were sold in multiple transactions with individual prices ranging between $19.57 and $19.80 per Depositary Share.

Did the ARCH CAPITAL GROUP LTD. (ACGL) director retain any Depositary Shares, Series F, after the sale?

According to the Form 4, after selling 3,000 Depositary Shares, Series F, Brian S. Posner reported holding zero of these Depositary Shares directly. The transaction therefore reflects a complete exit from this specific security position as reported.

What does the price range in the ARCH CAPITAL GROUP LTD. (ACGL) Form 4 footnote mean?

The Form 4 states the reported price is a weighted average, with individual trades executed between $19.57 and $19.80 per Depositary Share. Detailed trade-by-trade pricing information is available on request to the issuer, its security holders, or SEC staff.

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

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Accepted by SEC EDGAR 06/04/2026 - 06:23 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)
06/03/2026

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 F(1)	06/03/2026		S		3,000	D	$19.66(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 F 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 $19.57 to $19.80. 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	06/04/2026
	** 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)