Gagnon Securities LLC

SEC CIK: 0001125725
Latest filing: Aug 4, 2026

SEC filings (opens in a new tab)

ALT holding history

Altimmune, Inc. in every 13F filed by Gagnon Securities LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

ALT overview All 13F holders of ALT Full Q2 2026 holdings

Shares (Q1 2024): 0; Sold out in Q1 2024
Value: $0
% of portfolio: 0.0%
Quarters held: 2; Since Q3 2023

Holdings of ALT by Gagnon Securities LLC, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q1 2024	0	$0	0.0%	−111,342−100.0%	Sold out	Holders
Q4 2023	111,342	$1.25M	0.3%	−180−0.2%	Reduced	Holders
Q3 2023	111,522	$290.0K	0.1%	+111,522	New	Holders