Short answers, pulled from the story.
John Heminges was an English actor and financial manager of the King's Men, the playing company for which William Shakespeare wrote. He was baptised on the 25th of November 1566 in Droitwich, Worcestershire, and remained with the King's Men until his death in 1630.
John Heminges and Henry Condell edited and published the First Folio in 1623, gathering Shakespeare's collected plays into a single volume. Their preface, addressed to "the great Variety of Readers," expressed the wish that the author himself had lived to oversee his own writings. A number of Shakespeare's plays might have been lost without their editorial effort.
John Heminges is known to have performed in Ben Jonson's Sejanus and Every Man in His Humour, in both cases alongside Shakespeare. A Jacobean inscription in the 1616 Jonson folio also credits him with playing Corbaccio in Volpone, and since that list includes Nathan Field, who did not join the King's Men until 1616, Heminges appears to have continued acting into his fifties.
Heminges v Ostler was a lawsuit brought against John Heminges by his own daughter, Thomasina Ostler, over a share in the King's Men company. The surviving records do not reveal the final outcome of the suit.
John Heminges trained as a grocer in London, becoming a freeman of the Grocers' Company on the 24th of April 1587. Between 1595 and 1628, he took on ten apprentices through the company, and eight of those ten appear to have performed for his theatrical company.
John Heminges died in October 1630 in Southwark, and was buried on the 12th of October at St Mary Aldermanbury. In his will, he had asked to be buried as close to his wife as possible.