Follow the people · Insider
Cynthia Schwarzkopf
Cynthia Schwarzkopf files insider transactions with the SEC as a director of Miami International Holdings (MIAX). We hold 3 disclosed purchases and sales filed since 19 August 2025, 3 of them in the last 90 days.
- Files forMIAX
- Disclosed buys and sells3 in all, 3 in the last 90 days
- Last disclosure19 August 2026
Positions held
1 post we hold — a term names its own dates; a run of filings only says when they filed- Filed 15 August 2025 — 17 August 2026Director · Miami International Holdings (MIAX)28 Form 4 lines · source: SEC Form 4
Everything they disclosed
28 entries, newest first — one per disclosure report, one per Form 4 line- exercised options over 5,000 shares of Miami International HoldingsSEC Form 419 August 2026Common Stock · traded 17 August 2026 · filed 19 August 2026
- ▼ sold on the open market 5,000 shares of Miami International HoldingsSEC Form 419 August 2026Common Stock · traded 17 August 2026 · filed 19 August 2026
- exercised options over 5,000 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2026Stock Option (Right to Buy) · traded 17 August 2026 · filed 19 August 2026
- exercised options over 5,000 shares of Miami International HoldingsSEC Form 416 July 2026Common Stock · traded 15 July 2026 · filed 16 July 2026
- ▼ sold on the open market 5,000 shares of Miami International HoldingsSEC Form 416 July 2026Common Stock · traded 15 July 2026 · filed 16 July 2026
- exercised options over 5,000 shares of Miami International Holdings (a derivative holding)SEC Form 416 July 2026Stock Option (Right to Buy) · traded 15 July 2026 · filed 16 July 2026
- was granted 2,267 shares of Miami International HoldingsSEC Form 417 June 2026Common Stock · traded 15 June 2026 · filed 17 June 2026
- was granted 4,970 shares of Miami International HoldingsSEC Form 417 June 2026Common Stock · traded 16 June 2026 · filed 17 June 2026
- was granted 5,142 shares of Miami International Holdings (a derivative holding)SEC Form 417 June 2026Nonqualified Stock Option (Right to Buy) · traded 16 June 2026 · filed 17 June 2026
- exercised options over 19,500 shares of Miami International HoldingsSEC Form 412 June 2026Common Stock · traded 11 June 2026 · filed 12 June 2026
- ▼ sold on the open market 19,500 shares of Miami International HoldingsSEC Form 412 June 2026Common Stock · traded 11 June 2026 · filed 12 June 2026
- exercised options over 19,500 shares of Miami International Holdings (a derivative holding)SEC Form 412 June 2026Stock Option (Right to Buy) · traded 11 June 2026 · filed 12 June 2026
- converted 36,250 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Series B Preferred Stock · traded 15 August 2025 · filed 19 August 2025
- converted 45,058 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Nonvoting Common Stock · traded 15 August 2025 · filed 19 August 2025
- exercised options over 19,500 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 19,500 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 21,916 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 21,916 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 21,250 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 21,250 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 22,708 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 22,708 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 28,437 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 28,437 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 32,501 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 32,501 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- converted 36,250 shares of Miami International HoldingsSEC Form 419 August 2025Common Stock · traded 15 August 2025 · filed 19 August 2025
- converted 45,058 shares of Miami International HoldingsSEC Form 419 August 2025Common Stock · traded 15 August 2025 · filed 19 August 2025
Positions come from the unitedstates/congress-legislators roster, the Office of Government Ethics and the SEC’s Form 4 index. Every disclosed line names its own source and links the document the government published; we print what the filing says and never a price we did not read from it. Headlines and links come from the GDELT Global Knowledge Graph — the story stays with the publisher. The portrait, where we have one, is the public-domain Congressional Bioguide photograph.