Director at Arch Capital (ACGL) awarded 2,071 restricted common shares

Rhea-AI Filing Summary

MALLESCH EILEEN A reported acquisition or exercise transactions in this Form 4 filing.

ARCH CAPITAL GROUP LTD. director Eileen A. Mallesach received a grant of 2,071 common shares as equity compensation. The award was reported at a price of $0.00 per share, indicating a share grant rather than a market purchase. Following this grant, she directly holds 13,802 common shares. Under the restricted share agreement, these shares will vest on the earlier of one year after the grant date or the company’s next Annual General Meeting of Shareholders.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider MALLESCH EILEEN A

Role null

Type	Security	Shares	Price	Value
Grant/Award	Common Shares, $.0011 par value per share	2,071	$0.00	--

Holdings After Transaction: Common Shares, $.0011 par value per share — 13,802 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares granted: 2,071 shares Price per share: $0.00 per share Total holdings after grant: 13,802 shares +1 more

4 metrics

Shares granted 2,071 shares Restricted share grant to director on 2026-05-05

Price per share $0.00 per share Equity compensation grant, non-cash award

Total holdings after grant 13,802 shares Director’s direct ownership following transaction

Vesting condition Earlier of 1 year or next AGM Restricted share agreement footnote

Key Terms

restricted shares, restricted share agreement, Annual General Meeting of Shareholders, Grant, award, or other acquisition

4 terms

restricted shares financial

"represents restricted shares that will become vested on the date that is the earlier"

Restricted shares are company stock that cannot be sold or transferred immediately because they are subject to legal or contractual limits, such as a required holding period or performance conditions. They matter to investors because these locked-up shares can affect a company’s available stock for trading, future dilution, and insider incentives—imagine a gift that can’t be cashed until certain conditions are met, which changes when and how much supply can suddenly enter the market.

restricted share agreement financial

"Subject to the terms of the restricted share agreement, represents restricted shares"

Annual General Meeting of Shareholders financial

"or 2) Arch Capital Group Ltd.'s next Annual General Meeting of Shareholders"

Grant, award, or other acquisition financial

"transaction_code_description":"Grant, award, or other acquisition""

Form 4 Insider Transactions: What Each Field Means →

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^*

MALLESCH EILEEN A

(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)
05/05/2026

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
Common Shares, $.0011 par value per share	05/05/2026		A		2,071	A	(1)	13,802	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. Subject to the terms of the restricted share agreement, represents restricted shares that will become vested on the date that is the earlier of 1) one year following the grant date or 2) Arch Capital Group Ltd.'s next Annual General Meeting of Shareholders.

Remarks:

	/s/ Eileen A. Mallesch	05/07/2026
	** 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)

FAQ

What insider transaction did ARCH CAPITAL (ACGL) director Eileen Mallesach report?

Director Eileen A. Mallesach reported receiving a grant of 2,071 ARCH CAPITAL common shares as equity compensation. The shares were awarded at a stated price of $0.00 per share, reflecting a non-cash grant rather than an open-market purchase or sale.

How many ARCH CAPITAL (ACGL) shares does Eileen Mallesach hold after this grant?

After the reported equity grant, Eileen A. Mallesach directly holds 13,802 ARCH CAPITAL common shares. This total includes the newly granted 2,071 restricted shares, which are subject to vesting conditions under the company’s restricted share agreement terms.

When do Eileen Mallesach’s new ARCH CAPITAL (ACGL) restricted shares vest?

The 2,071 restricted shares granted to Eileen A. Mallesach will vest on the earlier of one year from the grant date or ARCH CAPITAL GROUP LTD.’s next Annual General Meeting of Shareholders, according to the restricted share agreement footnote disclosure.

Was cash paid for the ARCH CAPITAL (ACGL) shares granted to Eileen Mallesach?

No cash was paid for this grant. The Form 4 shows 2,071 common shares awarded at a transaction price of $0.00 per share, indicating a stock-based compensation grant instead of an open-market purchase with cash consideration.

Is Eileen Mallesach’s ARCH CAPITAL (ACGL) transaction a buy or a grant?

The transaction is classified as a grant or award acquisition, not a market buy. The Form 4 uses transaction code “A” with a description of “Grant, award, or other acquisition,” and shows a zero-dollar price per share for the 2,071 shares.