MAIR

SEC source: 0001628280-26-059013 · wk-form4_1787761059.xml · nonDerivative · entry 1

La Force Andrew Hudson III · CIK 0001431218 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,713

F1 · balance_after: Includes 16,713 EAR Units. Each EAR Unit represents the right to receive one share of Class A common stock upon vesting, subject to continued service through the applicable vesting date.

SEC source: 0001193125-26-371312 · ownership.xml · nonDerivative · entry 1

BERTARELLI ERNESTO · CIK 0001137404 · 10% owner

KC Armada LP · CIK 0002131198 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By K.C. Armada, LP

Disclosed balance after: 46,387,522

F1 · kind: On August 25, 2026, K.C. Armada, LP purchased 8,770,524 shares of the Issuer's Class A common stock from the Issuer at a price of $24.97 per share in a private placement.

F2 · ownership.nature: Represents securities held by K.C. Armada, LP, which may be deemed to be beneficially owned by Ernesto Bertarelli. Mr. Bertarelli disclaims beneficial ownership of such securities, except to the extent of his pecuniary interest therein.

SEC source: 0001193125-26-371628 · ownership.xml · nonDerivative · entry 2

Gies Larry · CIK 0002123654 · Director · 10% owner

Madison Industries Holdings LLC · CIK 0001808203 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 12,815,378

F1 · kind: The reported transaction represents a purchase from the Issuer pursuant to a securities purchase agreement with certain institutional accredited investors, expected to close on September 1, 2026.

F3 · ownership.nature: The reported securities are held directly by Madison Solutions LLC ("Madison Solutions"). As the sole manager of Madison Solutions, Mr. Gies may be deemed to beneficially own the reported securities held directly by Madison Solutions but disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.

SEC source: 0001193125-26-371628 · ownership.xml · nonDerivative · entry 1

Gies Larry · CIK 0002123654 · Director · 10% owner

Madison Industries Holdings LLC · CIK 0001808203 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 12,014,417

F1 · kind: The reported transaction represents a purchase from the Issuer pursuant to a securities purchase agreement with certain institutional accredited investors, expected to close on September 1, 2026.

F2 · ownership.nature: The reported securities are held in Mr. Gies' revocable trust. Mr. Gies disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.

SEC source: 0001628280-26-058831 · wk-form4_1787682959.xml · nonDerivative · entry 1

Larson Leah · CIK 0002109765 · Group President Air Mvmt/Heat

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 181,331

F1 · shares: Represents shares of the Issuer's Class A common stock withheld to satisfy the reporting person's tax obligation upon the vesting of 44,076 EAR Units. Each EAR Unit represents the right to receive one share of Class A common stock upon vesting, subject to continued service through the applicable vesting date.

F2 · balance_after: Includes 157,773 EAR Units.

SEC source: 0001628280-26-048411 · wk-form4_1784225957.xml · nonDerivative · entry 1

Wisniewski David M · CIK 0001736645 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,808

F1 · shares: Represents 19,808 equity appreciation rights units ("EAR Units"). Each EAR Unit represents the right to receive one share of the Issuer's Class A common stock upon vesting, subject to the reporting person's continued service through the applicable vesting date.

F2 · balance_after: Includes 19,808 EAR Units.

SEC source: 0001628280-26-045966 · wk-form4_1782761716.xml · nonDerivative · entry 1

La Force Andrew Hudson III · CIK 0001431218 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,713

F1 · shares: Represents 5,711 equity appreciation rights units ("EAR Units"). Each EAR Unit represents the right to receive one share of the Issuer's Class A common stock upon vesting, subject to the reporting person's continued service through the applicable vesting date.

F2 · balance_after: Includes 16,713 EAR Units.

SEC source: 0001628280-26-045963 · wk-form4_1782760960.xml · nonDerivative · entry 1

NOLEN GEORGE · CIK 0001503816 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,077

F1 · shares: Represents 5,077 equity appreciation rights units ("EAR Units"). Each EAR Unit represents the right to receive one share of the Issuer's Class A common stock upon vesting, subject to the reporting person's continued service through the applicable vesting date.

F2 · balance_after: Includes 5,077 EAR Units.

SEC source: 0001628280-26-044978 · wk-form4_1782252538.xml · nonDerivative · entry 1

Wyant Jill S · CIK 0001559370 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,472,415

F1 · shares: Represents shares of the Issuer's Class A common stock withheld to satisfy the reporting person's tax obligation upon the vesting of 184,854 EAR Units. Each EAR Unit represents the right to receive one share of Class A common stock upon vesting, subject to continued service through the applicable vesting date.

F2 · balance_after: Includes 2,094,231 EAR Units

SEC source: 0001628280-26-044975 · wk-form4_1782252388.xml · nonDerivative · entry 1

Foley John Joseph V · CIK 0002122782 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,641,786

F1 · shares: Represents shares of the Issuer's Class A common stock withheld to satisfy the reporting person's tax obligation upon the vesting of 46,215 EAR Units. Each EAR Unit represents the right to receive one share of Class A common stock upon vesting, subject to continued service through the applicable vesting date.

F2 · balance_after: Includes 506,537 EAR Units

SEC source: 0001628280-26-043815 · wk-form4_1781720594.xml · nonDerivative · entry 1

Wyant Jill S · CIK 0001559370 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,566,033

F1 · shares: Represents shares of the Issuer's Class A common stock withheld to satisfy the reporting person's tax obligation upon the vesting of 330,753 EAR Units. Each EAR Unit represents the right to receive one share of Class A common stock upon vesting, subject to continued service through the applicable vesting date.

F2 · balance_after: Includes 2,279,085 EAR Units

SEC source: 0001628280-26-036255 · wk-form4_1779208334.xml · nonDerivative · entry 1

Philippi Dale · CIK 0002109826 · President & CEO of AprilAire

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 233,613

F1 · shares: Includes 18,293 equity appreciation rights units (EAR Units). Each EAR Unit represents the right to receive one share of Class A common stock upon vesting, subject to continued service through the applicable vesting date.

F2 · balance_after: Includes 233,613 EAR Units.