Montreal asset manager Letko Brosseau has once again significantly increased its stake in Dorel.

The purchase of nearly 1.2 million shares of the Montreal furniture and children’s products maker on May 10 forced the statement. Letko Brosseau’s stake in Dorel was 19.5% to start June.

Letko Brosseau is Dorel’s largest institutional shareholder. After purchases made in April, stock purchases in May took the stake from approximately 13% to almost 20% in two months.

The Sportico website revealed a few days ago that businessman Larry Tanenbaum was considering selling a portion of his shares in Maple Leaf Sports.

The founder and big boss of Haivision has just bought for more than $ 300,000 shares of the Montreal supplier of solutions for streaming video. Mirko Wicha bought a total of 77,000 shares during the June 16 and June 20 sessions.

Montreal asset manager Fiera Capital lowered its investment in Tecsys last spring. Fiera has just told authorities that it started June with an 11.9% stake in the Montreal supply chain management software provider. Fiera says it started the month with 108,512 fewer Tecsys shares than at the start of February last year.

A member of Saputo’s management team has just purchased shares of the Montreal dairy processor for just over $230,000. The head of acquisitions and strategic development, Martin Gagnon, bought a block of 7,500 shares on June 13.

An Air Canada director has just purchased shares of the Montreal airline for just over $140,000. Christie Clark purchased a block of 6,000 shares on June 15 at a unit price of $23.47. He has been on the board for 10 years, and the number of shares he held already met Air Canada’s share ownership guidelines.

The head of finance at Reitmans last week sold shares of the Montreal retailer. Richard Wait sold a block of 12,000 non-voting shares on Tuesday at a price of $3.09 per share.

A major shareholder of SupremeX continues to increase its stake in the Montreal manufacturer of envelopes and packaging products. George Christopoulos bought 2,000 shares on Tuesday at a unit price of $5.33. With a stake of more than 10%, he is the company’s second largest shareholder.

A senior executive at Héroux-Devtek has just sold shares of the Longueuil landing gear manufacturer. Alexandre Verdon, vice president in charge of business development and mergers and acquisitions, sold 4,000 shares on June 16.

The Quebec securities of iA Financial Group, Molson Coors, BMTC and Groupe ADF all reached a 52-week high this week on the Toronto Stock Exchange. In contrast, GDI, Innergex, Tecsys, and Hexo hit 52-week lows.