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Altimmune (ALT) CSO acquires 875 ESPP shares at $2.414

(Neutral)
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Altimmune, Inc. Chief Scientific Officer Roberts M Scot acquired 875 shares of common stock on July 31, 2026 through the company’s 2019 Employee Stock Purchase Plan. The shares were purchased at $2.414 per share, equal to 85% of that day’s closing price, bringing his direct holdings to 113,699 shares.

Positive

  • None.

Negative

  • None.
Insider Roberts M Scot
Role Chief Scientific Officer
Type Security Shares Price Value
Grant/Award Common Stock, par value $0.0001 F1, F2 875 $2.414 $2K
Holdings After Transaction: Common Stock, par value $0.0001 — 113,699 shares (Direct)
Footnotes (2)
  1. F1. 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 February 1, 2026 through July 31, 2026.
  2. F2. In accordance with the ESPP, these shares were purchased based on 85% of the closing price of the Issuer's common stock on July 31, 2026.
ESPP shares acquired 875 shares Common stock purchased on July 31, 2026 under 2019 ESPP
Purchase price $2.414 per share ESPP purchase price equal to 85% of July 31, 2026 closing price
Holdings after transaction 113,699 shares Direct common stock ownership following ESPP purchase
ESPP discount 85% of closing price Shares purchased at 85% of Altimmune common stock closing price on July 31, 2026
Employee Stock Purchase Plan financial
"participation by the reporting individual in the Issuer's 2019 Employee Stock Purchase Plan"
An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.
ESPP financial
"It pertains to the ESPP purchase period from February 1, 2026 through July 31, 2026"
An Employee Stock Purchase Plan (ESPP) is a company program that lets employees buy the company’s shares at a reduced price, usually by setting aside a small portion of their pay over time. It matters to investors because it encourages employees to own part of the business—like giving staff a discounted membership— which can boost commitment and performance, while also potentially increasing the number of shares available and affecting shareholder value.
par value financial
"Common Stock, par value $0.0001"
Par value is the fixed amount printed on a bond or stock that represents its original value when issued. It’s like the face value of a coin or bill—what the issuer promises to pay back or the starting price of a stock—though it often doesn’t change with market prices. It matters because it helps determine certain financial details, like how much the company will pay back at maturity.
closing price financial
"purchased based on 85% of the closing price of the Issuer's common stock"

AI-generated analysis. How Rhea-AI works. Not financial advice.

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FAQ

What insider transaction did Altimmune (ALT) report for Roberts M Scot?

Altimmune reported that Chief Scientific Officer Roberts M Scot acquired 875 common shares on July 31, 2026. The shares were purchased through the 2019 Employee Stock Purchase Plan at $2.414 per share, equal to 85% of that day’s closing price, raising his holdings to 113,699 shares.

At what price were the ESPP shares purchased in Altimmune (ALT)'s latest Form 4?

The reported ESPP purchase price was $2.414 per share. According to the disclosure, this price reflects 85% of the closing price of Altimmune’s common stock on July 31, 2026, as provided under the terms of the 2019 Employee Stock Purchase Plan.

How many Altimmune (ALT) shares does Roberts M Scot own after this transaction?

Following the ESPP purchase, Roberts M Scot directly owns 113,699 shares of Altimmune common stock. This total includes the newly acquired 875 shares bought on July 31, 2026, and represents his reported direct beneficial ownership after the transaction.

Was the Altimmune (ALT) insider purchase made under an Employee Stock Purchase Plan?

Yes. The acquisition of 875 shares by Roberts M Scot was made through Altimmune’s 2019 Employee Stock Purchase Plan. It relates to the ESPP purchase period running from February 1, 2026 through July 31, 2026, with pricing set at 85% of the closing share price.

Did the Altimmune (ALT) Form 4 disclose any stock sales by Roberts M Scot?

No. The Form 4 reports only an acquisition of 875 Altimmune common shares via the ESPP. There are no disclosed stock sales, derivative exercises, or other dispositions by Roberts M Scot in this particular filing, and post-transaction holdings remain entirely direct.
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Roberts M Scot

(Last)(First)(Middle)
910 CLOPPER ROAD
SUITE 201S

(Street)
GAITHERSBURG MARYLAND 20878

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Altimmune, Inc. [ ALT ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Scientific Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
07/31/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock, par value $0.000107/31/2026A(1)875A$2.414(2)113,699D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. 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 February 1, 2026 through July 31, 2026.
2. In accordance with the ESPP, these shares were purchased based on 85% of the closing price of the Issuer's common stock on July 31, 2026.
/s/ Gregory Weaver, as Attorney-in-Fact08/03/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)