RE:secondary offering By MasonPR does mention, no additional sale by Mason at least for 180 days
" As part of the Offering, the Selling Shareholder has agreed, subject to certain exceptions, not to sell any Shares or other securities of ATS held by the Selling Shareholder as of the Closing for a period of 180 days from the Closing."
The Selling Shareholder notes, “As a long-time investor in ATS, Mason remains committed to the Company as reflected by our significant ownership stake. We are proud of the Company's growth and achievements to date. We look forward to our ongoing partnership with the Company's management team, board and other stakeholders to continue driving growth and increasing shareholder value, and have full confidence in management and ATS’ value creation strategies.”