SC 13G

Name of Reporting Person

Ameriprise Financial, Inc.

S.S. or I.R.S. Identification No. of Above Person

IRS No. 13-3180631

Check the Appropriate Box if a Member of a Group

(a) ☐ (b) ☒*

* This filing describes the reporting person’s relationship with other persons, but the reporting person does not affirm the existence of a group.

SEC Use Only

Citizenship or Place of Organization

Delaware

SC 13G 1 d774900dsc13g.htm SC 13G SC 13G

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities and Exchange Act of 1934

Altimmune, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

02155H200

(CUSIP Number)

December 31, 2023

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

This Schedule is filed pursuant to Rule 13d-1(b)

The information required in the remainder of this cover page (except any items to which the form provides a cross-reference) shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act.

CUSIP NO. 02155H200

CUSIP NO. 02155H200

CUSIP NO. 02155H200

CUSIP NO. 02155H200

CUSIP NO. 02155H200

CUSIP NO. 02155H200

CUSIP NO. 02155H200

CUSIP NO. 02155H200


1(a)	Name of Issuer:	Altimmune, Inc.

1(b)	Address of Issuer’s Principal	910 Clopper Road, Suite 201S
	Executive Offices:	Gaithersburg, Maryland 20878

2(a)	Name of Person Filing:	(a) Ameriprise Financial, Inc. (“AFI”)
		(b) TAM UK International Holdings Limited (“TAMUKI”)
		(c) Threadneedle Holdings Limited (“THL”)
		(d) TAM UK Holdings Limited (“TUHL”)
		(e) Threadneedle Asset Management Holdings Limited (“TAMHL”)
		(f) TC Financing Ltd (“TCFL”)
		(g) Threadneedle Asset Management Limited (“TAML”)
		(h) Threadneedle Investment Services Limited (“TISL”)

		Persons (a) through (h) are sometimes referred to herein as the “Ameriprise Entities”.

2(b)	Address of Principal Business Office:	(a) Ameriprise Financial, Inc. 145 Ameriprise Financial Center Minneapolis, MN 55474
		(b) Cannon Place, 78 Cannon Street, London, EC4N 6AG
		(c) Cannon Place, 78 Cannon Street, London, EC4N 6AG
		(d) Cannon Place, 78 Cannon Street, London, EC4N 6AG
		(e) Cannon Place, 78 Cannon Street, London, EC4N 6AG
		(f) Cannon Place, 78 Cannon Street, London, EC4N 6AG
		(g) Cannon Place, 78 Cannon Street, London, EC4N 6AG
		(h) Cannon Place, 78 Cannon Street, London, EC4N 6AG

2(c)	Citizenship:	(a) Delaware
		(b) England and Wales
		(c) England and Wales
		(d) England and Wales
		(e) England and Wales
		(f) England and Wales
		(g) England and Wales
		(h) England and Wales


2(d)	Title of Class of Securities:	Common Stock

2(e)	Cusip Number:	02155H200

3	Information if statement is filed pursuant to Rules 13d-1(b) or 13d-2(b):

(a) Ameriprise Financial, Inc.

A parent holding company in accordance with Rule 13d-1(b)(1)(ii)(G). (Note: See Item 7)

(b) TAM UK International Holdings Limited

SEC Form SC 13G filed by Altimmune Inc.