Vipin K. Garg - 30 Jan 2026 Form 4 Insider Report for Altimmune, Inc. (ALT)

Reporting relationship: Director
Issuer ticker: ALT
Reported as of: 30 Jan 2026
Net transaction value: -$43,876
SEC form: 4
Accepted by SEC: 02 Feb 2026, 16:15:29 UTC
Prior SEC filing: 29 Jan 2026
Source filing: View source filing
Reporting owner signature: /s/ Gregory Weaver, as Attorney-in-Fact

Key filing fact

Vipin K. Garg filed Form 4 for Altimmune, Inc. (ALT) on 02 Feb 2026.

Key facts

This page summarizes Vipin K. Garg's Form 4 filing for Altimmune, Inc. (ALT).
4 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 02 Feb 2026, 16:15.

Change

Previous filing in this sequence was filed on 29 Jan 2026.
Current net transaction value: -$43,876.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001515813 Primary reporting owner

Garg Vipin K

Relationship: Director
Address: 910 CLOPPER ROAD, SUITE 201S, GAITHERSBURG
Signature: /s/ Gregory Weaver, as Attorney-in-Fact
Signature date: 02 Feb 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ALT transaction

Common Stock, par value $0.0001

Options Exercise

Transaction value: $0
Shares: +26,775
Change %: +6.7%
Price: $0.000000
Shares after: 429,225
Date: 30 Jan 2026
Ownership: Direct
Footnotes: F1

ALT transaction

Common Stock, par value $0.0001

Tax liability

Transaction value: $65,139
Shares: -11,632
Change %: -2.7%
Price: $5.60
Shares after: 417,593
Date: 30 Jan 2026
Ownership: Direct
Footnotes: F2

ALT transaction

Common Stock, par value $0.0001

Award

Transaction value: $21,263
Shares: +6,926
Change %: +1.7%
Price: $3.07
Shares after: 424,519
Date: 31 Jan 2026
Ownership: Direct
Footnotes: F3, F4

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ALT transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value: $0
Shares: -26,775
Change %: -50%
Price: $0.000000
Shares after: 26,775
Date: 30 Jan 2026
Ownership: Direct
Underlying class: Common Stock, par value $0.0001
Underlying amount: 26,775
Exercise price
Footnotes: F1, F5

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

Vipin K. Garg is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 5 footnotes

Footnote F1

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.0001, when vested.

Footnote F2

Vesting transaction: Shares surrendered to the Issuer solely to cover taxes associated with vesting of RSUs.

Footnote F3

These shares were purchased due to participation by the reporting individual in the Issuer's 2019 Employee Stock Purchase Plan ("ESPP"). It pertains to the ESPP purchase period from August 1, 2025 through January 31, 2026

Footnote F4

In accordance with the ESPP, these shares were purchased based on 85% of the closing price of the Issuer's common stock on August 1, 2025

Footnote F5

The RSUs become vested in substantially equal annual installments over the 4 years following January 30, 2023, subject to the reporting person's continued service through the applicable vesting date, and have no expiration date.