GAGNON SECURITIES LLC

Broker-Dealer

Position in ATNM — Actinium Pharmaceuticals, Inc.

CIK 1125725 New York, NY

Position in ATNM

as of Mar 31, 2026 · filed Apr 22, 2026 Compact

Position Value

$200,293

-$74,164 QoQ

Shares Held

201,300

-0.3% QoQ

Ownership

0.642%

of shares outstanding

% of Portfolio

0.05%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2025

5 quarters on record

Voting authority Sole 0.ToString("F0")% Shared 0.ToString("F0")% None 100.ToString("F0")%

Healthcare · as of Mar 31, 2026

GAGNON SECURITIES LLC holds $7,116,400 across 4 Biotechnology names. ATNM ranks #4 (2.8% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	CELC	Celcuity Inc.	53,342	$6,088,455
2	TECH	BIO-TECHNE Corp	9,879	$516,276
3	RNTX	Rein Therapeutics, Inc.	239,520	$311,376
4	ATNM	Actinium Pharmaceuticals, Inc. This page	201,300	$200,293

5 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
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.