[Form 4] Limbach Holdings, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Reed Michael James reported acquisition or exercise transactions in this Form 4 filing.

Limbach Holdings, Inc. reported that Chief Operating Officer Michael James Reed received a grant of 403 restricted stock units (RSUs) on May 18, 2026. These RSUs vest in three annual installments on May 18, 2027, May 18, 2028, and May 18, 2029, subject to continued employment.

The filing also shows he directly holds 3,507 shares of common stock after the reported transactions. Earlier RSU awards granted in 2024, 2025 and 2026 are scheduled to vest in tranches of 689 shares on January 1, 2027, 468 shares on January 1, 2028, and 268 shares on January 1, 2029, all subject to service-based vesting conditions.

The company notes that any performance-based or market-based RSUs that may be earned, but whose performance outcomes are not yet determined, will be reported later on separate Forms 4. No open‑market purchases or sales are reported in this filing.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Reed Michael James

Role Chief Operating Officer

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	403	$0.00	--
holding	Common Stock	--	--	--

Holdings After Transaction: Restricted Stock Units — 403 shares (Direct, null); Common Stock — 3,507 shares (Direct, null)

Footnotes (1)

1. The amount of common stock includes awards of restricted stock units (each, an "RSU") granted on January 1, 2024, January 1, 2025, May 1, 2025, and January 1, 2026. Each RSU represents a contingent right to receive one share of Limbach Holdings, Inc. (the "Company") common stock, exempt under Rule 16b-3(d)(1) and (3). Each RSU is subject to service-based vesting conditions. The RSUs vest, in the aggregate, as follows: 689 shares on January 1, 2027, 468 shares on January 1, 2028, and 268 shares on January 1, 2029. The amount of common stock does not include performance-based and market-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievements of the applicable performance goals. Any such performance-based and market-based RSUs will be reported on a Form 4 within two business days of the date of such determination. Each RSU represents a contingent right to receive one share of the Company's common stock and is exempt under Rule 16b-3(d)(1) and (3). This award of RSUs was granted on May 18, 2026. The award is subject to service-based vesting conditions and vests in three annual installments on May 18, 2027, May 18, 2028 and May 18, 2029, with the final installment adjusted to reflect that no fractional shares will be issued, subject to continued employment through each applicable vesting date. The amounts reported above (related to this grant) do not include market-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSUs will be reported on a Form 4 within two business days of the date of such determination.

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^*

Reed Michael James

(Last) (First) (Middle)

5102 W LAUREL STREET, SUITE 700

(Street)

TAMPA FLORIDA 33607

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Limbach Holdings, Inc. [ LMB ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/18/2026

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 Stock								3,507(1)	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
Restricted Stock Units	(2)	05/18/2026		A		403		(3)	(3)	Common Stock	403	$0	403	D

Explanation of Responses:

1. The amount of common stock includes awards of restricted stock units (each, an "RSU") granted on January 1, 2024, January 1, 2025, May 1, 2025, and January 1, 2026. Each RSU represents a contingent right to receive one share of Limbach Holdings, Inc. (the "Company") common stock, exempt under Rule 16b-3(d)(1) and (3). Each RSU is subject to service-based vesting conditions. The RSUs vest, in the aggregate, as follows: 689 shares on January 1, 2027, 468 shares on January 1, 2028, and 268 shares on January 1, 2029. The amount of common stock does not include performance-based and market-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievements of the applicable performance goals. Any such performance-based and market-based RSUs will be reported on a Form 4 within two business days of the date of such determination.

2. Each RSU represents a contingent right to receive one share of the Company's common stock and is exempt under Rule 16b-3(d)(1) and (3).

3. This award of RSUs was granted on May 18, 2026. The award is subject to service-based vesting conditions and vests in three annual installments on May 18, 2027, May 18, 2028 and May 18, 2029, with the final installment adjusted to reflect that no fractional shares will be issued, subject to continued employment through each applicable vesting date. The amounts reported above (related to this grant) do not include market-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSUs will be reported on a Form 4 within two business days of the date of such determination.

Remarks:

	/s/ Dan Murtha, Attorney-in-fact for Michael J. Reed	05/20/2026
	** 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)