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Canada Construction & Engineering

Greenbriar Sustainable Living Inc (GRB)

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Over the last 90 days, Greenbriar Sustainable Living Inc. has seen insider transactions totaling CAD 1,890.00, with a net buy value of CAD 1,890.00. A total of 11 transactions were recorded, with a net buy as a percentage of float at 0.0001%. Notably, Jeffrey Joseph Ciachurski made multiple buy transactions.
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Ticker: GRB Exchange: CVE
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings
Top insiders
Trades
Ciachurski, Jeffrey Joseph
10% Security Holder of Issuer, Director of Issuer, Senior Officer of Issuer
1 purchase — total 100,000 CAD
Buy 18 Jun 2026
Value CA$752,478.69 | Price 496.84 | Shares 32,527
Buy 17 Jun 2026
Value CA$3,166,103.11 | Price 378.62 | Shares 73,513
Buy 29 May 2026
Value CA$550.00 | Price 0.55 | Shares 1,000
Buy 19 May 2026
Value CA$580.00 | Price 0.58 | Shares 1,000
Buy 15 May 2026
Value CA$590.00 | Price 0.59 | Shares 1,000
Buy 12 May 2026
Value CA$570.00 | Price 0.57 | Shares 1,000
Buy 12 May 2026
Value CA$285.00 | Price 0.57 | Shares 500
Buy 12 May 2026
Value CA$280.00 | Price 0.56 | Shares 500
Buy 12 May 2026
Value CA$550.00 | Price 0.55 | Shares 1,000
Buy 28 Apr 2026
Value CA$500.00 | Price 0.50 | Shares 1,000
Sale 2 Apr 2026
Value CA$1,200.00 | Price 0.40 | Shares 3,000
Buy 5 Mar 2026
Value CA$535.00 | Price 0.54 | Shares 1,000
Buy 20 Feb 2026
Value US$16,000.00 | Price 0.32 | Shares 50,000
Buy 19 Feb 2026
Value US$180.80 | Price 0.32 | Shares 565
Buy 13 Feb 2026
Value US$3,200.00 | Price 0.32 | Shares 10,000
Buy 12 Feb 2026
Value CA$12,400.00 | Price 0.32 | Shares 38,750
Buy 9 Feb 2026
Value US$527.00 | Price 0.31 | Shares 1,700
Buy 15 Jan 2026
Value US$36,860.00 | Price 0.38 | Shares 97,000
Buy 9 Jan 2026
Value US$1,080.00 | Price 0.36 | Shares 3,000
Buy 14 Oct 2025
Value CA$880.00 | Price 0.44 | Shares 2,000
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-06-20 2026-06-18 B Purchase
2.4
Ciachurski, Jeffrey Joseph

10% Security Holder of Issuer, Director of Issuer, Senior Officer of Issuer

Executive Director Large shareholder
32,527 -10.7%
496.84
CA$752,479 		32,527 -10.7% 496.84 CA$752,479
2026-06-20 2026-06-17 B Purchase
2.4
Ciachurski, Jeffrey Joseph

10% Security Holder of Issuer, Director of Issuer, Senior Officer of Issuer

Executive Director Large shareholder
73,513 -35.0%
378.62
CA$3,166,103 		73,513 -35.0% 378.62 CA$3,166,103
2026-06-01 2026-05-29 B Purchase
2.4
Ciachurski, Jeffrey Joseph

10% Security Holder of Issuer, Director of Issuer, Senior Officer of Issuer

Executive Director Large shareholder
24,517 -4.3%
139.05
CA$4,939,010 		24,517 -4.3% 139.05 CA$4,939,010
2026-05-21 2026-05-19 B Purchase
2.4
Ciachurski, Jeffrey Joseph

10% Security Holder of Issuer, Director of Issuer, Senior Officer of Issuer

Executive Director Large shareholder
1,000 +0.0%
0.58
CA$580 		1,000 +0.0% 0.58 CA$580
2026-05-21 2026-05-15 B Purchase
2.4
Ciachurski, Jeffrey Joseph

10% Security Holder of Issuer, Director of Issuer, Senior Officer of Issuer

Executive Director Large shareholder
1,000 +0.0%
0.59
CA$590 		1,000 +0.0% 0.59 CA$590
2026-05-14 2026-05-12 B Purchase
2.4
Ciachurski, Jeffrey Joseph

10% Security Holder of Issuer, Director of Issuer, Senior Officer of Issuer

Executive Director Large shareholder
1,000 +0.0%
0.57
CA$570 		1,000 +0.0% 0.57 CA$570
2026-05-14 2026-05-12 B Purchase
2.4
Ciachurski, Jeffrey Joseph

10% Security Holder of Issuer, Director of Issuer, Senior Officer of Issuer

Executive Director Large shareholder
500 +0.0%
0.57
CA$285 		500 +0.0% 0.57 CA$285
2026-05-14 2026-05-12 B Purchase
2.4
Ciachurski, Jeffrey Joseph

10% Security Holder of Issuer, Director of Issuer, Senior Officer of Issuer

Executive Director Large shareholder
500 +0.0%
0.56
CA$280 		500 +0.0% 0.56 CA$280
2026-05-14 2026-05-12 B Purchase
2.4
Ciachurski, Jeffrey Joseph

10% Security Holder of Issuer, Director of Issuer, Senior Officer of Issuer

Executive Director Large shareholder
1,000 +0.0%
0.55
CA$550 		1,000 +0.0% 0.55 CA$550
2026-05-01 2026-04-28 B Purchase
2.4
Ciachurski, Jeffrey Joseph

10% Security Holder of Issuer, Director of Issuer, Senior Officer of Issuer

Executive Director Large shareholder
1,000 +0.0%
0.50
CA$500 		1,000 +0.0% 0.50 CA$500
2026-04-08 2026-04-02 S Sale
2.4
Ciachurski, Jeffrey Joseph

10% Security Holder of Issuer, Director of Issuer, Senior Officer of Issuer

Executive Director Large shareholder
3,000 -0.1%
0.40
CA$1,200 		3,000 -0.1% 0.40 CA$1,200
2026-03-06 2026-03-05 B Purchase
2.4
Ciachurski, Jeffrey Joseph

10% Security Holder of Issuer, Director of Issuer, Senior Officer of Issuer

Executive Director Large shareholder
1,000 +0.0%
0.54
CA$535 		1,000 +0.0% 0.54 CA$535
2026-02-23 2026-02-20 B Purchase
2.5
Conlan, Brian

Director of Issuer

Non-Executive Director
50,000 +5.9%
0.32
US$16,000 		50,000 +5.9% 0.32 US$16,000
2026-02-23 2026-02-19 B Purchase
2.5
Conlan, Brian

Director of Issuer

Non-Executive Director
565 +0.1%
0.32
US$181 		565 +0.1% 0.32 US$181
2026-02-23 2026-02-13 B Purchase
2.5
Conlan, Brian

Director of Issuer

Non-Executive Director
10,000 +1.2%
0.32
US$3,200 		10,000 +1.2% 0.32 US$3,200
2026-02-23 2026-02-12 B Purchase
2.5
Conlan, Brian

Director of Issuer

Non-Executive Director
38,750 +4.8%
0.32
CA$12,400 		38,750 +4.8% 0.32 CA$12,400
2026-02-23 2026-02-09 B Purchase
2.5
Conlan, Brian

Director of Issuer

Non-Executive Director
1,700 +0.2%
0.31
US$527 		1,700 +0.2% 0.31 US$527
2026-01-15 2026-01-15 B Purchase
2.5
Conlan, Brian

Director of Issuer

Non-Executive Director
97,000 +13.8%
0.38
US$36,860 		97,000 +13.8% 0.38 US$36,860
2026-01-12 2026-01-09 B Purchase
2.5
Conlan, Brian

Director of Issuer

Non-Executive Director
3,000 +0.4%
0.36
US$1,080 		3,000 +0.4% 0.36 US$1,080
2025-12-13 2025-10-14 B Purchase
2.4
Ciachurski, Jeffrey Joseph

10% Security Holder of Issuer, Director of Issuer, Senior Officer of Issuer

Executive Director Large shareholder
2,000 +0.1%
0.44
CA$880 		2,000 +0.1% 0.44 CA$880
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