There are many possibilities. There could be double prints. There could be stock flipping, if they engaged in an offering, the stock could be DWAC eligible and electronically deposited into clients accounts for instant resale, such as if the issuer sent a corporate resolution a list of shareholders for stock issuance at 9am to the transfer agent, they should be in client accounts by lunch time available for resale.
You won't know until the dust settles. The company, if they wanted to, could know by Monday. They can pull an SPR Report from DTCC as of the day before the issuances and one on Monday and compare them, then pull a transfer activity report from the transfer agent on Monday and do a little accounting and know who was selling.
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