GAGNON SECURITIES LLC

Broker-Dealer

Position in ATNM — Actinium Pharmaceuticals, Inc.

CIK 1125725 New York, NY

Position in ATNM

as of Jun 30, 2026 · filed Aug 5, 2026 Compact

Position Value

$178,499

-$21,794 QoQ

Shares Held

182,142

-9.5% QoQ

Ownership

0.579%

of shares outstanding

% of Portfolio

0.04%

of 13F equity value

Holder Rank

of 47 holders

Holding Since

Mar 2025

6 quarters on record

Voting authority Sole 0% Shared 0% None 100%

Healthcare · as of Jun 30, 2026

GAGNON SECURITIES LLC holds $7,175,658 across 5 Biotechnology names. ATNM ranks #5 (2.5% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	CELC	Celcuity Inc.	53,240	$5,569,968
2	TECH	BIO-TECHNE Corp	12,230	$864,049
3	VCEL	Vericel Corp	7,303	$324,910
4	RNTX	Rein Therapeutics, Inc.	229,070	$238,232
5	ATNM	Actinium Pharmaceuticals, Inc. This page	182,142	$178,499

6 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$178,499	182,142	-9.5%	Shares	Sole	2026-08-05
2026-03-31	$200,293	201,300	-0.3%	Shares	Sole	2026-04-22
2025-12-31	$274,457	201,807	-10.8%	Shares	Sole	2026-02-13
2025-09-30	$362,011	226,257	-0.2%	Shares	Sole	2025-11-03
2025-06-30	$317,270	226,622	0.0%	Shares	Sole	2025-07-23
2025-03-31	$364,861	226,622	—	Shares	Sole	2025-05-09
No filing history on record for this holder in this stock.