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Date Issuer Insider Transaction Amount New Balance ⓘ
The balance of securities held by registered holder at the time of the transaction. Insiders may direct multiple registered holders and hold multiple security types.
Recent filings
Filed 2025-12-15 16:03
Tx date 2016-10-31 		$ACO
ATCO LTD. 		Southern, Margaret E
3 - 10% Security Holder of Issuer
Direct Ownership
Non-Voting Shares Class I
00 - Opening Balance-Initial SEDI Report 		6,592
Filed 2025-12-15 13:38
Tx date 2025-12-11 		$ACO
ATCO LTD. 		Southern, Margaret E
3 - 10% Security Holder of Issuer
Holder: Trustee (Spousal Trust) (Indirect Ownership)
Non-Voting Shares Class I
36 - Conversion or exchange
+4,600 vol 		27,226,513
Filed 2025-12-15 13:37
Tx date 2025-12-11 		$ACO
ATCO LTD. 		Southern, Margaret E
3 - 10% Security Holder of Issuer
Holder: Trustee (Spousal Trust) (Indirect Ownership)
Common Shares Class II
36 - Conversion or exchange
-4,000 vol 		11,542,320
Filed 2025-12-15 13:26
Tx date 2025-12-11 		$ACO
ATCO LTD. 		Southern, Margaret E
3 - 10% Security Holder of Issuer
Direct Ownership
Non-Voting Shares Class I
36 - Conversion or exchange
+3,790 vol 		10,372
Filed 2025-12-15 13:24
Tx date 2025-12-11 		$ACO
ATCO LTD. 		Southern, Margaret E
3 - 10% Security Holder of Issuer
Direct Ownership
Common Shares Class II
36 - Conversion or exchange
-3,296 vol 		0
Older filings
Filed 2016-11-03 15:57
Tx date 2016-10-31 		$ACO
ATCO LTD. 		Southern, Margaret E
3 - 10% Security Holder of Issuer
Direct Ownership
Non-Voting Shares Class I
00 - Opening Balance-Initial SEDI Report
Filed 2025-12-10 17:15
Tx date 2025-12-08 		$ACO
ATCO LTD. 		Southern, Margaret E
3 - 10% Security Holder of Issuer
Holder: Trustee (Spousal Trust) (Indirect Ownership)
Non-Voting Shares Class I
10 - Acquisition or disposition in the public market 		$360,106
+6,725 vol
$53.55 each 		27,221,913
Filed 2025-12-10 17:14
Tx date 2025-12-08 		$ACO
ATCO LTD. 		Southern, Margaret E
3 - 10% Security Holder of Issuer
Holder: Trustee (Spousal Trust) (Indirect Ownership)
Non-Voting Shares Class I
10 - Acquisition or disposition in the public market 		$535,999
+10,000 vol
$53.60 each 		27,215,188
Filed 2025-12-10 17:14
Tx date 2025-12-08 		$ACO
ATCO LTD. 		Southern, Margaret E
3 - 10% Security Holder of Issuer
Holder: Trustee (Spousal Trust) (Indirect Ownership)
Non-Voting Shares Class I
10 - Acquisition or disposition in the public market 		$267,250
+5,000 vol
$53.45 each 		27,205,188
Filed 2025-12-10 17:13
Tx date 2025-12-08 		$ACO
ATCO LTD. 		Southern, Margaret E
3 - 10% Security Holder of Issuer
Holder: Trustee (Spousal Trust) (Indirect Ownership)
Non-Voting Shares Class I
10 - Acquisition or disposition in the public market 		$266,747
+5,000 vol
$53.35 each 		27,200,188
Filed 2025-12-10 17:13
Tx date 2025-12-08 		$ACO
ATCO LTD. 		Southern, Margaret E
3 - 10% Security Holder of Issuer
Holder: Trustee (Spousal Trust) (Indirect Ownership)
Non-Voting Shares Class I
10 - Acquisition or disposition in the public market 		$266,000
+5,000 vol
$53.20 each 		27,195,188
Filed 2025-12-10 17:12
Tx date 2025-12-08 		$ACO
ATCO LTD. 		Southern, Margaret E
3 - 10% Security Holder of Issuer
Holder: Trustee (Spousal Trust) (Indirect Ownership)
Non-Voting Shares Class I
10 - Acquisition or disposition in the public market 		$529,000
+10,000 vol
$52.90 each 		27,190,188
Filed 2025-12-10 17:11
Tx date 2025-12-08 		$ACO
ATCO LTD. 		Southern, Margaret E
3 - 10% Security Holder of Issuer
Holder: Trustee (Spousal Trust) (Indirect Ownership)
Non-Voting Shares Class I
10 - Acquisition or disposition in the public market 		$142,425
+2,700 vol
$52.75 each 		27,180,188
Filed 2025-09-23 12:57
Tx date 2025-09-22 		$ACO
ATCO LTD. 		Southern, Margaret E
3 - 10% Security Holder of Issuer
Holder: Trustee (Spousal Trust) (Indirect Ownership)
Non-Voting Shares Class I
10 - Acquisition or disposition in the public market 		$1,210,000
+25,000 vol
$48.40 each 		27,177,488
Filed 2025-09-23 12:56
Tx date 2025-09-22 		$ACO
ATCO LTD. 		Southern, Margaret E
3 - 10% Security Holder of Issuer
Holder: Trustee (Spousal Trust) (Indirect Ownership)
Non-Voting Shares Class I
10 - Acquisition or disposition in the public market 		$640,395
+13,245 vol
$48.35 each 		27,152,488
Filed 2025-09-23 12:56
Tx date 2025-09-22 		$ACO
ATCO LTD. 		Southern, Margaret E
3 - 10% Security Holder of Issuer
Holder: Trustee (Spousal Trust) (Indirect Ownership)
Non-Voting Shares Class I
10 - Acquisition or disposition in the public market 		$476,190
+9,900 vol
$48.10 each 		27,139,243
Filed 2025-09-23 12:55
Tx date 2025-09-22 		$ACO
ATCO LTD. 		Southern, Margaret E
3 - 10% Security Holder of Issuer
Holder: Trustee (Spousal Trust) (Indirect Ownership)
Non-Voting Shares Class I
10 - Acquisition or disposition in the public market 		$19,236
+400 vol
$48.09 each 		27,129,343
Filed 2025-09-23 12:55
Tx date 2025-09-22 		$ACO
ATCO LTD. 		Southern, Margaret E
3 - 10% Security Holder of Issuer
Holder: Trustee (Spousal Trust) (Indirect Ownership)
Non-Voting Shares Class I
10 - Acquisition or disposition in the public market 		$19,232
+400 vol
$48.08 each 		27,128,943
Filed 2025-06-10 13:22
Tx date 2025-06-09 		$ACO
ATCO LTD. 		Southern, Margaret E
3 - 10% Security Holder of Issuer
Holder: Trustee (Spousal Trust) (Indirect Ownership)
Non-Voting Shares Class I
10 - Acquisition or disposition in the public market 		$374,423
+7,407 vol
$50.55 each 		27,128,543
Filed 2025-06-10 13:22
Tx date 2025-06-09 		$ACO
ATCO LTD. 		Southern, Margaret E
3 - 10% Security Holder of Issuer
Holder: Trustee (Spousal Trust) (Indirect Ownership)
Non-Voting Shares Class I
10 - Acquisition or disposition in the public market 		$253,000
+5,000 vol
$50.60 each 		27,121,136