Notice of Proposed Sale · 144

Avalo Therapeutics, Inc.

AVTXNASDAQEQUITYCurrent

Notice of Proposed Sale

Filed Aug 17, 2026Accepted Aug 17, 2026, 4:47 PM EDTFiling CIK 1810417Accession 0001950047-26-008273

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Structured filing — 144

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Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.

Proposed-sale notice

Issuer: AVALO THERAPEUTICS, INC.
Issuer CIK: 0001534120
SEC file number: 001-37590
Phone: 4105228707
Person for whose account securities are to be sold: CHRISTOPHER RYAN SULLIVAN
Relationships to issuer: Officer
Street: 1500 Liberty Ridge Drive, Suite 321
City: Wayne
State / country code: PA
Postal code: 19087

Securities proposed for sale

Securities proposed for sale · 1 reported row
Security	Proposed units	Aggregate market value	Units outstanding	Approximate sale date	Exchange	Broker / market maker
Common	70,709	1,385,189.31	53,629,989	08/17/2026	NASDAQ	Morgan Stanley Smith Barney LLC Executive Financial Services

Broker / market maker — proposed row 1, entry 1

Name: Morgan Stanley Smith Barney LLC Executive Financial Services
Street: 1 New York Plaza
Street (continued): 8th Floor
City: New York
State / country code: NY
Postal code: 10004

Acquisition of securities to be sold

Acquisition of securities to be sold · 1 reported row
Security	Acquired	Nature of acquisition	Acquired from	Amount acquired	Gift transaction	Payment date	Nature of payment
Common	08/17/2026	Exercise of Stock Options	Issuer	70,709	N	08/17/2026	Cash

Prior-sale reporting

Nothing to report for the preceding three months: Y

Remarks

The securities to be sold were and will be received upon the exercise of stock options over the next three months. The dates of acquisition and payment were and will be the dates of exercise/sale.

Notice signature

Notice date: 08/17/2026
Signed: /s/ Christopher Ryan Sullivan
Plan adoption dates: 05/18/2026

Company context

Current securities

AVTXNASDAQ · EQUITY · Current

Historical securities (2)

CERCWNASDAQ · WARRANT · Historical · closed Oct 18, 2018 CERCZNASDAQ · WARRANT · Historical · closed Apr 18, 2017

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