Wesfarmers is trading at A$77.39, up 4.09%, with no clear company-specific catalyst identified for the September 30 move. - Its announcement listing showed latest notices dated September 18 and September 4. - The ASX 200 was up less than 0.1% during the morning, not a strong same-direction move that clearly explains the gain. - No reliable volume or trading-activity figure was available to confirm unusual activity.