RE:RE:RE:RE:RE:Stock Buy BackYour question had been answered in the Company Manual.
"the listed issuer, directly or indirectly, has control over the time, price, amount and manner of purchases or the choice of the broker through which the purchases are to be made. [...]
Within 10 days of the end of each month in which any purchases are made, whether the securities were purchased through the facilities of TSX or otherwise, the listed issuer shall report its purchases to TSX stating the number of securities purchased during its purchases that month, giving the volume weighted average price paid and stating whether the securities have been cancelled, reserved for issuance or otherwise dealt with. Nil reports are not required. The listed issuer may delegate the reporting requirement to the broker appointed to make its purchases"
It's Largo's choice and there is no way of knowing who the denominated broker is, if any, unless the company publishes the info.