Senior insider sale

S. Vice President, GC & Secy. at HECLA MINING CO/DE/ — senior position signals high conviction

$4.04M

207.55K shares

What this filing means

SIENKO DAVID C plans to sell 207.55K shares of HECLA MINING CO/DE/ valued at approximately $4.04M. Form 144 is a notice of intent to sell restricted or control securities — not a mandatory transaction. This filing provides advance warning of potential selling pressure.

SIENKO DAVID C

Filed: 12/17/2025ACC: 0001481905-25-000011

InsiderSIENKO DAVID CCIK 1481905

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IssuerHECLA MINING CO/DE/CIK 719413

Officer· S. Vice President, GC & Secy.

Since Mar 2026

207.55K

Shares to sell

$4.04M

Approx. market value

207.55K

Acquired (3 months)

Planned

Securities Acquired — Last 3 Months6

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Vested Restricted Stock

6/21/2024

16.44K

STIP & LTIP Performance-based Shares

3/18/2024

24.39K

Vested Restricted Stock

6/21/2023

19.75K

Vested Performance-based Stock

2/28/2023

35.22K

Vested Performance-based Stock

2/28/2022

71.27K

Vested Restricted Stock

6/21/2021

40.48K

Total acquired207.55K

Acquisition Date	Type	Amount Acquired	Gift
6/21/2024	Vested Restricted Stock Vested Restricted Stock	16.44K	—
3/18/2024	STIP & LTIP Performance-based Shares STIP & LTIP Performance-based Shares	24.39K	—
6/21/2023	Vested Restricted Stock Vested Restricted Stock	19.75K	—
2/28/2023	Vested Performance-based Stock Vested Performance-based Stock	35.22K	—
2/28/2022	Vested Performance-based Stock Vested Performance-based Stock	71.27K	—
6/21/2021	Vested Restricted Stock Vested Restricted Stock	40.48K	—
Total		207.55K

Planned & Completed Dispositions1

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NYSEPlanned

Units to sell

207.55K

Market value

$4.04M

12/17/2025

Total

Units

207.55K

Value

$4.04M

Date	Units to Sell	Approx. Market Value	Exchange	Status
12/17/2025	207.55K	$4.04M	NYSE	Planned
Total	207.55K	$4.04M