I thought most ipo's prohibited those shareholders under lock-up from using any sort of derivative. I mean I have read that in a lot of S-1's.
I took a 2020 ipo off the top of my head,Snowflake, and pulled up the S-1 just to check.
https://www.sec.gov/Archives/edgar/data/0001640147/000162828020013381/snowflakes-1a1.htm
Lock-up Arrangements
Our directors, executive officers, and the holders of substantially all of our common stock and securities exercisable for or convertible into our Class A common stock and Class B common stock outstanding on the closing of this offering, have agreed, or will agree, with the underwriters
not to, during specified periods of time after the date of this prospectus, subject to certain exceptions, without the prior written consent of Goldman Sachs & Co. LLC, offer, sell, contract to sell, pledge,
grant any option to purchase, make
any short sale, or otherwise dispose of any of our shares of common stock, any options or warrants to purchase any of our shares of common stock or any securities convertible into or
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exchangeable for or that represent the right to receive shares of our common stock. Under the terms of the lock-up agreements with the underwriters: