Granahan Investment Management, LLC

Position in UAMY — United States Antimony Corp

CIK 1026710 WALTHAM, MA

Position in UAMY

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$1,665,981

-$238,765 QoQ

Shares Held

229,474

+5.2% QoQ

Ownership

0.153%

of shares outstanding

% of Portfolio

0.06%

of 13F equity value

Holder Rank

#37

of 241 holders

Holding Since

Dec 2025

3 quarters on record

Voting authority Sole 96% Shared 0% None 4%

Basic Materials · as of Jun 30, 2026

Granahan Investment Management, LLC holds $30,747,719 across 3 Other Industrial Metals & Mining names. UAMY ranks #3 (5.4% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	MTRN	MATERION Corp	69,793	$20,755,740
2	MP	MP Materials Corp. / DE	148,652	$8,325,998
3	UAMY	United States Antimony Corp This page	229,474	$1,665,981

3 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$1,665,981	229,474	+5.2%	Shares	Sole	2026-08-14
2026-03-31	$1,904,746	218,184	-54.4%	Shares	Sole	2026-05-15
2025-12-31	$2,404,534	478,991	—	Shares	Sole	2026-02-17
No filing history on record for this holder in this stock.