ALT Altimmune, Inc.

NASDAQ
$3.30

Altimmune, Inc. (ALT) Insider Activity

What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.

30D 90D 6M 1Y
Insider signal Bullish Insiders bought more than they sold over this window — uncommon at any size.
Cluster activity 0 buyers in the last 30 days 1 buyer in the last 90 days 0 sellers in the last 90 days
Insiders buying
6
11 transactions
Insiders selling
0
0 transactions
Purchases
$370.0K
105,227 shares
Sales
$0
0 shares
Net activity
$370.0K
purchases less sales

Where they traded

Buy Sell Dot area is proportional to transaction value.

Last open-market purchase: August 13, 2026 , by Durso Jerome Benedict .

Recent open-market activity

Date Insider Role Action Shares Price Value Held after
Durso Jerome Benedict President and CEO Buy 15,000 $2.95 $44.3K 62,500
GILL JOHN Director Buy 9,200 $3.41 $31.3K 21,700
Durso Jerome Benedict President and CEO Buy 15,000 $3.14 $47.1K 47,500
WEAVER GREGORY L Chief Financial Officer Buy 10,000 $3.15 $31.5K 38,078
Durso Jerome Benedict President and CEO Buy 20,000 $3.54 $70.8K 32,500
WEAVER GREGORY L Chief Financial Officer Buy 5,000 $3.54 $17.7K 28,078
Pisano Wayne Director Buy 5,000 $4.08 $20.4K 13,498
Sohn Catherine A. Director Buy 500 $4.24 $2.1K 1,500
Jorkasky Diane Director Buy 527 $3.80 $2.0K 527
GILL JOHN Director Buy 12,500 $4.10 $51.3K 12,500
Durso Jerome Benedict Director Buy 12,500 $4.13 $51.6K 12,500

Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.