No. Conditional residence begins at immigrant admission or adjustment approval. A company meeting is not that immigration event.
Use the actual status record
The ordinary I-829 window is the 90 days before the second anniversary of conditional residence. Neither attendance at a meeting nor filing the petition guarantees removal of conditions or capital repayment.
Useful markers include a completed source-of-funds file, signed enterprise documents, the petition receipt, current Visa Bulletin movement for the relevant category and chargeability, and the consular or adjustment stage. Schedule three checkpoints across the conditional period: an early one to agree the evidence list, a midpoint one to test what has been collected, and one roughly six months before the window opens to prepare the filing. Check the Visa Bulletin against your birth country each month, and note the dates that matter to you: status expiry, extension filing windows, and the point at which an adjustment or consular interview becomes realistic. A closing deadline set by a promoter is a commercial device, not an immigration requirement, and hurrying the one stage an investor fully controls rarely improves anything, since petition adjudication, visa availability, and later stages carry no fixed dates. Check current processing information on the USCIS site and the monthly Visa Bulletin rather than relying on a figure quoted at a seminar, and treat conditional residence as a stage, not the finish.