For those unfamiliar with the Toronto Stock Exchange manual
Pursuant to paragraph 629(k), bought back shares must be reported within 10 days of the end of the prior month.
"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; however, the listed issuer bears the responsibility of ensuring timely reports are made. TSX periodically publishes a list of securities purchased pursuant to normal course issuer bids."
The TSX is close tomorrow (Friday April 7)
OBE reported access to funds to started its buy back on March 22
We should hear about shares purchased in March, on or before Monday.