GRB — Greenbriar Sustainable Living Inc.

Price Chart

12 months daily · TSXV:GRB

Insider Transactions

90-day window · 8 filings

Date	Insider	Role	Nature	Dir.	Shares	Buy Price	Return	Value
Jul 24, 2026	Conlan, Brian	—	Open Market	Buy	8,000	$0.47	+17.0% · 31d	$4K
Jun 29, 2026	Ciachurski, Jeffrey Joseph	—	Open Market	Buy	700	$0.77	-28.6% · 56d	$539
Jun 18, 2026	Ciachurski, Jeffrey Joseph	—	Open Market	Buy	500	$0.65	-15.4% · 67d	$325
Jun 17, 2026	Ciachurski, Jeffrey Joseph	—	Open Market	Buy	1,100	$0.59	-6.8% · 68d	$649
Jun 15, 2026	Sutherland, William Robert	—	Comp. Grant	Buy	125,000	$0.55	+0.0% · 70d	$69K
Jun 12, 2026	Kunz, Daniel	—	Comp. Grant	Buy	125,000	$0.55	+0.0% · 73d	$69K
Jun 12, 2026	Balic, Anthony Bob	—	Comp. Grant	Buy	75,000	—	—	—
May 29, 2026	Ciachurski, Jeffrey Joseph	—	Open Market	Buy	1,000	$0.55	+0.0% · 87d	$550

Score uses open-market buys only · 5 open-market · 3 plan / compensation shown but not scored · Return is unrealized, to today's price; a “· Nd” mark means the 90-day window is still open (N of 90 days) — too early to judge.

Score Breakdown

Signal Analyst · $29/mo

Component	Points	Max	Detail
Conviction (unique buyers) ✓ FREE PREVIEW	25	30	2 unique buyers
Buy/sell ratio		20	100% buys (5B / 0S)
Dollar value		25	$6K
Lobbying activity		15	None
Contract wins		10	None
Insider track record		10	No track record data
Private placements		8	None
Confluence bonus		10	None
Cluster timing (velocity)		10	No coordinated buying cluster detected
Buy/sell reversal pattern		8	No buy/sell reversal pattern
Total	50	100

Unlock Component Detail — CAD $29/mo

Buying Insiders

Open-market · 90 days · 2 unique buyers

Insider	Credibility	Hit Rate	Avg 90d Return	Trades (eval'd)	Buy Value (90d)	Last Buy
Conlan, Brian	—	—	—	—	$4K	Jul 24, 2026
Ciachurski, Jeffrey Joseph	—	—	—	—	$2K	Jun 29, 2026

Credibility score: historical hit rate × avg 90d return × sample size. View full insider leaderboard →

Lobbying Registrations

OCL active · none found

No active OCL lobbying registrations in the last 90 days. Analyst plan →

Government Contract Wins

90-day window · none found

No government contract wins in the last 90 days. Analyst plan →

Private Placements

12 months · Signal Analyst · $29/mo

Private placement history, deal size, and lock-up expiry tracking. Analyst plan →

Indigenous Consultation

no records on file

No Indigenous consultation records on file for GRB.

SEDAR+ Filings

official filing registry

Form55 monitors SEDAR+ filing alerts and newswire announcements for Technical Reports and material changes. Search SEDAR+ →

Short Interest

CIRO · Aug 15, 2026

Shares short

13,603

Net change

-3,465 (-20.3%)

History

Aug 15: 13,603

Jul 31: 17,068

Jul 15: 686

Jun 30: 9,941

Jun 15: 24,083

May 31: 25,710

Aggregate short position from CIRO's Consolidated Short Position Report (published twice monthly).

Boardroom Connections

2 insiders also active elsewhere

Insider	Other boards	Also an insider at
Balic, Anthony Bob	3	LBI (55), FMN (39), GGA
Kunz, Daniel	1	ARK

People who file as insiders here and at other TSX/TSXV companies (number in brackets = that company's Confluence Score). A well-connected insider taking a seat at a new junior can be an early tell. Matched by name across SEDI filings; funds and 10%+ holders excluded.