SEC Form 4 · accession 0001515156-26-000123

Arq, Inc. · ARQ

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Officer — Chief Accounting Officer

Period of report

Sep 1, 2026

Accepted (ET)

Sep 3, 2026 · 5:32 pm EDT

Rule 10b5-1 plan

box not checked

Issuer CIK

0001515156

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F1	Sep 1, 2026	A	100,000	$0.00	A	100,000	D
Common Stock^F2	Sep 1, 2026	A	61,047	$0.00	A	161,047	D

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Performance Share Units^F3,F4,F5	—	Sep 1, 2026	A	61,047	A	—	Mar 15, 2029	Common Stock	122,094	61,047	D

F1Represents restricted stock awards ("RSAs") granted to Mr. Owino as an employment inducement award. 33,333 RSAs will vest on each of September 1, 2027 and September 1, 2028, and 33,334 RSAs will vest on September 1, 2029.
F2Represents RSAs granted in accordance with the Issuer's long-term incentive plan under the Issuer's 2026 Omnibus Incentive Plan, approved by stockholders on June 10, 2026. The RSAs shall vest in three equal installments, on each of September 1, 2027, March 23, 2028, and March 23, 2029.
F3Represents performance share units ("PSUs") granted in accordance with the Issuer's long-term incentive plan under the Issuer's 2026 Omnibus Incentive Plan.
F4Each PSU represents a contingent right to receive one share of the Issuer's common stock upon vesting of the PSU, which will occur, if at all, no later than March 15, 2029 subject to the reporting person's continuous service with the Issuer or its related entities and the achievement of certain pre-established goals to be measured as of December 31, 2028.
F5Represents the maximum number of PSUs that will vest, if at all, which is 200% of the target award.