Altimmune, Inc. (ALT) Insider Trading & SEC Filings

Updated Jul 16, 2026 · Last SEC filing 2026-05-01

Altimmune, Inc. (ALT) has filed 8 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-05-01. 3 Form 8-K material event filings were reported by ALT in the last 90 days. InsiderAlpha tracks every ALT SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.

About Altimmune, Inc. (ALT)

SIC classification	Pharmaceutical Preparations (SIC 2834)
SEC CIK	0001326190

90-Day SEC Filing Activity

Form 4 filings (90d)	8
Form 8-K filings (90d)	3
Latest Form 4 filing	2026-05-01

Recent ALT Insider Transactions (Form 4)

Date	Insider	Role	Transaction	Shares	Price	Value	Filing
2026-04-06	GILL JOHN	Insider	P — Open-market purchase	9.2K	$3.41	$31K	SEC
2026-04-01	WEAVER GREGORY L	Chief Financial Officer	P — Open-market purchase	10.0K	$3.15	$31K	SEC
2026-04-01	Durso Jerome Benedict	President and CEO	P — Open-market purchase	15.0K	$3.14	$47K	SEC
2026-03-06	Durso Jerome Benedict	President and CEO	P — Open-market purchase	20.0K	$3.54	$71K	SEC
2026-03-06	WEAVER GREGORY L	Chief Financial Officer	P — Open-market purchase	5.0K	$3.54	$18K	SEC
2026-02-02	Roberts M Scot	Chief Scientific Officer	F — Tax withholding / forfeiture	2.3K	$5.55	$13K	SEC
2026-02-02	Roberts M Scot	Chief Scientific Officer	M — Option exercise	7.8K	$0.00	—	SEC
2026-01-31	Roberts M Scot	Chief Scientific Officer	A — Grant or award	5.6K	$3.07	$17K	SEC
2026-01-31	Jordt Raymond M	Chief Business Officer	A — Grant or award	4.6K	$3.07	$14K	SEC
2026-01-31	Garg Vipin K	Insider	A — Grant or award	6.9K	$3.07	$21K	SEC
2026-01-30	Roberts M Scot	Chief Scientific Officer	F — Tax withholding / forfeiture	2.9K	$5.60	$16K	SEC
2026-01-30	Garg Vipin K	Insider	M — Option exercise	26.8K	$0.00	—	SEC
2026-01-30	Garg Vipin K	Insider	F — Tax withholding / forfeiture	11.6K	$5.60	$65K	SEC
2026-01-30	Roberts M Scot	Chief Scientific Officer	M — Option exercise	9.3K	$0.00	—	SEC
2026-01-27	Garg Vipin K	Insider	F — Tax withholding / forfeiture	17.9K	$6.18	$111K	SEC

All transactions sourced from SEC EDGAR Form 4 filings for Altimmune, Inc. (ALT). Updated in real time as new filings are submitted to the SEC.

Most-Active ALT Insiders — Last 90 Days

Insider	Form 4 filings	Total transaction value
SAYARE MITCHEL	1	—
Pisano Wayne	1	—
Hodges Philip	1	—
Schafer Klaus	1	—
GILL JOHN	1	—

Recent ALT Form 8-K Material Events

2026-06-16 — Item 8.01 [SEC]
2026-05-13 — Item 2.02, 9.01 [SEC]
2026-04-24 — Item 1.01, 9.01 · Financing · positive [SEC]
Altimmune completed a public offering of 64.25 million shares of common stock and 10.75 million pre-funded warrants at $3.00 per share, raising approximately $211.2 million in net proceeds. The company plans to use the capital to advance clinical development of pemvidutide, inclu
2026-04-16 — Item 5.03, 5.07, 9.01 · Other · neutral [SEC]
Altimmune held its 2026 Annual Meeting of Shareholders on April 16, 2026, where shareholders approved an amendment to increase authorized common stock from 200 million to 400 million shares. All six director nominees were elected with substantial support. This is a routine annual
2026-03-05 — Item 2.02, 9.01 · Earnings · neutral [SEC]
Altimmune, Inc. announced its financial results for the fourth quarter and full year ended December 31, 2025 via press release on March 5, 2026. The filing provides standard financial reporting without explicit beat/miss language or forward guidance changes.

Recent Insider Filings

2026-05-01 — Lawver Teri L (Insider)
2026-05-01 — Sohn Catherine A. (Insider)
2026-05-01 — Jorkasky Diane (Insider)
2026-05-01 — Schafer Klaus (Insider)
2026-05-01 — Pisano Wayne (Insider)

Form 4 Transaction Code Reference

SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in ALT insider filings:

P	Open-market purchase by the insider
S	Open-market sale by the insider
A	Grant, award, or other acquisition from the issuer
M	Exercise or conversion of derivative security (e.g. options)
F	Payment of exercise price or tax liability via share withholding
G	Bona-fide gift of securities
D	Disposition to the issuer (e.g. share buyback participation)
J	Other acquisition or disposition
X	Exercise of in-the-money or at-the-money derivative security
C	Conversion of derivative security
V	Transaction voluntarily reported earlier than required

ALT Insider Trading — FAQ

What is the latest insider trade for ALT?: Altimmune, Inc. (ALT) had 8 insider filings in the last 90 days, with the most recent on 2026-05-01. InsiderAlpha tracks every Form 4, 10-K, 10-Q, and 8-K filing in real time.
How many insiders are buying ALT stock?: 0 insider purchases of ALT were filed in the last 90 days.
How many insiders are selling ALT stock?: 0 insider sales of ALT were filed in the last 90 days.
Where can I see ALT SEC filings (Form 4, 10-K, 10-Q, 8-K)?: InsiderAlpha aggregates every ALT SEC filing — Form 4 insider transactions, 10-K and 10-Q quarterly reports, and 8-K material event disclosures — in one timeline.

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