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Altimmune, Inc. (ALT)

Altimmune, Inc. (ALT) Insider Trading

Directors, officers and holders of more than 10% of ALT report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.

Recent Form 4 transactions

The 50 most recent of 162 transactions on file: 6 with code P, 0 with code S and 44 with other codes.

DateInsiderCodeShares
Oct 1, 2026MENZIUSO RICHARD THOMASA Award84,546
Oct 1, 2026WEAVER GREGORY LM Exercise14,475
Oct 1, 2026MENZIUSO RICHARD THOMASA Award36,234
Oct 1, 2026Arbet-Engels ChristopheM Exercise37,500
Oct 1, 2026WEAVER GREGORY LM Exercise14,475
Oct 1, 2026WEAVER GREGORY LF Tax Payment4,379
Oct 1, 2026Arbet-Engels ChristopheF Tax Payment12,679
Oct 1, 2026Arbet-Engels ChristopheM Exercise37,500
Sep 16, 2026Richardson Linda MM Exercise24,000
Sep 16, 2026Richardson Linda MM Exercise24,000
Sep 16, 2026Richardson Linda MF Tax Payment6,826
Aug 13, 2026Durso Jerome BenedictP Purchase15,000
Jul 31, 2026WEAVER GREGORY LA Award1,753
Jul 31, 2026Roberts M ScotA Award875
May 1, 2026Schafer KlausA Award48,800
May 1, 2026SAYARE MITCHELA Award48,800
May 1, 2026Hodges PhilipA Award48,800
May 1, 2026Lawver Teri LA Award48,800
May 1, 2026GILL JOHNA Award48,800
May 1, 2026Jorkasky DianeA Award48,800
May 1, 2026Pisano WayneA Award48,800
May 1, 2026Sohn Catherine A.A Award48,800
Apr 6, 2026GILL JOHNP Purchase9,200
Apr 1, 2026Durso Jerome BenedictP Purchase15,000
Apr 1, 2026WEAVER GREGORY LP Purchase10,000
Mar 6, 2026Durso Jerome BenedictP Purchase20,000
Mar 6, 2026WEAVER GREGORY LP Purchase5,000
Feb 26, 2026WEAVER GREGORY LA Award111,000
Feb 26, 2026WEAVER GREGORY LA Award259,000
Feb 26, 2026Roberts M ScotA Award222,670
Feb 26, 2026Roberts M ScotA Award95,430
Feb 2, 2026Roberts M ScotM Exercise7,775
Feb 2, 2026Roberts M ScotF Tax Payment2,329
Feb 2, 2026Roberts M ScotM Exercise7,775
Jan 31, 2026Roberts M ScotA Award5,567
Jan 31, 2026Jordt Raymond MA Award4,571
Jan 31, 2026Garg Vipin KA Award6,926
Jan 30, 2026Roberts M ScotM Exercise9,275
Jan 30, 2026Garg Vipin KM Exercise26,775
Jan 30, 2026Roberts M ScotF Tax Payment2,859
Jan 30, 2026Roberts M ScotM Exercise9,275
Jan 30, 2026Garg Vipin KF Tax Payment11,632
Jan 30, 2026Garg Vipin KM Exercise26,775
Jan 27, 2026Roberts M ScotM Exercise15,850
Jan 27, 2026Garg Vipin KF Tax Payment17,898
Jan 27, 2026Roberts M ScotF Tax Payment4,748
Jan 27, 2026Jordt Raymond MM Exercise15,850
Jan 27, 2026Jordt Raymond MF Tax Payment4,229
Jan 27, 2026Garg Vipin KM Exercise41,200
Jan 27, 2026Garg Vipin KM Exercise41,200

The full Form 4 history is on the ALT company page (Insider Trades card, View all).

Questions about this data

Which insider transactions are open-market trades?

Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.

How quickly are insider trades reported?

A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.

Who has to file Form 4?

Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.

Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.