Investor Guardian Capital Lp
13D/G Filings

This page shows a list of all the recent 13D/G filings made by Guardian Capital Lp . Schedule 13D is commonly referred to as a “beneficial ownership report.” The term "beneficial owner" is defined under SEC rules. It includes any person who directly or indirectly shares voting power or investment power (the power to sell the security).

When a person or group of persons acquires beneficial ownership of more than 5% of a voting class of a company’s equity securities, they are required to file a Schedule 13D within ten days after the purchase. Click the link icon to see the full transaction history.

Date Form Target Prev
Shares
Current
Shares
Change
(Percent)
Ownership
(Percent)
Change
(Percent)
2025-02-14 13G/A MKTX / MarketAxess Holdings Inc. 1,882,832 1,789,582
2024-02-14 13G/A MKTX / MarketAxess Holdings Inc. 1,910,101 1,882,832
2023-02-15 13G MKTX / MarketAxess Holdings Inc. 1,910,101
2020-04-09 13G/A CLS / Celestica Inc. 6,283,478 571,300
2020-02-14 13G CLS / Celestica Inc. 6,283,478
2018-02-12 13G/A MITL / Mitel Networks Corp 6,891,479 5,074,956
2017-02-14 13G MITL / Mitel Networks Corp 6,891,479
2014-02-13 13G/A SWIR / Sierra Wireless Inc 750,080
2013-02-13 13G/A SWIR / Sierra Wireless Inc 1,652,225
2012-01-10 13G/A SWIR / Sierra Wireless Inc 1,854,843