Greenland Mines GRML Insider Ownership

NASDAQ GRML

$5.45 -0.25 (-4.39%)

At close: Oct 28, 2026 · 4:00 PM EDT

Insider Holdings by Owner

381.06K Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

9.33%

▲+0.753% pp QoQ

Shares Held by Insiders

296.57K

filed for Sep 2026

▲+8.77% QoQ

Shares Outstanding

3.18Mn

3,177,013 shares

Direct Holdings

296.57K

Indirect: 0

Net Open-Market Trades

+49.60K

net bought · $462.13K in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Open-Market Insider Trades

Bought Sold

Latest quarter —

Net over range —

Net-buying quarters —

Insider Ownership Summary

Updated Oct 10, 2026

Over the past year, GRML insiders bought $462,126 of stock and sold $73,275 on the open market.

Behind Greenland Mines' open-market trades in the past 12 months were 3 insiders buying and one insider selling.
Among GRML insiders, Jeff Leblanc (Chief Financial Officer) bought the most stock on the open market in the past 12 months: $381,360, most recently on August 25, 2026.
On the sell side, Riad Hussein El-Dada led open-market sales of Greenland Mines stock over the past 12 months with $73,275, most recently on October 1, 2026.
Business Quant data shows Greenland Mines insiders holding 293.07K shares in total in their latest Form 4 filings, up 7.49% from 272.66K shares (split-adjusted) at the end of Q2 2026 and up 74.59% from 167.87K shares (split-adjusted) at the end of Q3 2025.
By type of ownership, GRML insiders hold all of their 293.07K shares directly.
The insider holdings in Greenland Mines belong to 6 insiders who have reported on Form 4 within the past two years.
Greenland Mines' three biggest insider holders are Joseph Sinkule (Chief Executive Officer, 126.93K shares), Jeff Leblanc (Chief Financial Officer, 110.41K shares) and Samuel M. Zentman (Director, 21.73K shares), based on their latest Form 4 filings.
The largest insider, Joseph Sinkule, holds 43.31% of GRML's insider total.
Institutions owned 12.03% of GRML shares as of Q2 2026; insiders' latest Form 4 filings account for about 9.22%, leaving roughly 78.75% with other investors, including the public.
A total of 15 Form 4 filings with transactions in Greenland Mines stock were made over the past 12 months, by 7 insiders.
This summary of Greenland Mines insider activity covers Form 4 filings through October 5, 2026.

Form 4 Holdings

Insiders Holding GRML

Insiders 8

Shares held 381.06K

Of outstanding 11.99%

#	Insider	Position	Direct	Total	Share of Insiders	Last Filed
1	Joseph Sinkule	Chief Executive Officer	126,934	126,934	33.3%	06 Mar, 2026
2	Jeff Leblanc	Chief Financial Officer	110,406	110,406	29.0%	25 Aug, 2026
3	Capital Llc Redwoods	TenPercentOwner	62,300	62,300	16.3%	11 Apr, 2022
4	Capital Markets Llc Chardan	TenPercentOwner	25,687	25,687	6.7%	02 Jul, 2024
5	Samuel M Zentman	Director	21,729	21,729	5.7%	06 Mar, 2026
6	Shalom Hirschman	Director	18,177	18,177	4.8%	04 Mar, 2026
7	Jon Mcgarity	Director	11,026	11,026	2.9%	20 Jul, 2026
8	Jason David Sawyer	Director	4,800	4,800	1.3%	23 Jul, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

35 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
01 Oct, 2026	Riad Hussein El-Dada	Other	Disposed S	3,500	$9.35	$32.73K	0	Direct
25 Aug, 2026	Jeff Leblanc	Chief Financial Officer	Acquired P	14,000	$9.72	$136.08K	110,406	Direct
22 Jul, 2026	Jason David Sawyer	Director	Acquired P	240,000	$11.66	$2.80Mn	4,800	Direct
20 Jul, 2026	Jon Mcgarity	Director	Acquired P	140,000	$8.87	$1.24Mn	11,026	Direct
16 Jul, 2026	Jeff Leblanc	Chief Financial Officer	Acquired P	1,400,000	$8.76	$12.26Mn	96,407	Direct
25 Jun, 2026	Riad Hussein El-Dada	Director	Disposed S	175,000	$11.59	$2.03Mn	3,500	Direct
04 Mar, 2026	Jeff Leblanc	Chief Financial Officer	Acquired A	2,500,000	—	—	68,407	Direct
04 Mar, 2026	Samuel M Zentman	Director	Acquired A	350,000	—	—	21,729	Direct
04 Mar, 2026	Joseph Sinkule	Chief Executive Officer	Acquired A	2,500,000	—	—	126,934	Direct
04 Mar, 2026	Riad Hussein El-Dada	Director	Acquired A	350,000	—	—	7,000	Direct
04 Mar, 2026	Shalom Hirschman	Director	Acquired A	350,000	—	—	18,177	Direct
04 Mar, 2026	Jon Mcgarity	Director	Acquired A	350,000	—	—	8,226	Direct
10 Dec, 2025	Samuel M Zentman	Director	Acquired A	20,000	$20.50	$410.00K	1,200	Direct
10 Dec, 2025	Jon Mcgarity	Director	Acquired A	20,000	$20.50	$410.00K	1,200	Direct
10 Dec, 2025	Riad Hussein El-Dada	Director	Acquired A	20,000	$20.50	$410.00K	1,200	Direct
25 Sep, 2025	Joseph Sinkule	Chief Executive Officer	Acquired J	400,000	—	—	96,934	Direct
25 Aug, 2025	Jeff Leblanc	Chief Financial Officer	Acquired A	200,000	—	—	18,407	Direct
22 Jul, 2025	Joseph Sinkule	Chief Executive Officer	Disposed J	2,000,000	—	—	78,190	Direct
05 Aug, 2025	Shalom Hirschman	Director	Acquired A	70,149	—	—	11,177	Direct
05 Aug, 2025	Jon Mcgarity	Director	Acquired A	14,641	—	—	933	Direct

Showing 1 to 20 of 35 transactions