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upon the closing of the Issuer's initial public offering (the \"IPO) and has no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Shares of Series B Preferred Stock automatically converted into shares of common stock upon the closing of the Issuer's initial public offering (the \"IPO) and has no expiration date."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":250456},"source":{"system":"sec-edgar","filing":"0001104659-21-084748","document":"tm2120463-4_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1558569/000110465921084748/tm2120463-4_4seq1.xml","form_type":"4"}},{"id":2656796,"issuer":{"id":8372,"kind":"organization","name":"iSpecimen Inc."},"owners":[{"id":137953,"kind":"organization","name":"OBF Investments, LLC","position":1,"cik":"0001857012","reported_name":"OBF Investments, 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