Follow the people · Insider
Douglas M. Schafer Jr.
Douglas M. Schafer Jr. files insider transactions with the SEC as an evp and cio of Miami International Holdings (MIAX). We hold 6 disclosed purchases and sales filed since 15 August 2025, 3 of them in the last 90 days.
- Files forMIAX
- Disclosed buys and sells6 in all, 3 in the last 90 days
- Last disclosure4 September 2026
Positions held
1 post we hold — a term names its own dates; a run of filings only says when they filed- Filed 13 August 2025 — 2 September 2026EVP and CIO · Miami International Holdings (MIAX)52 Form 4 lines · source: SEC Form 4
Everything they disclosed
52 entries, newest first — one per disclosure report, one per Form 4 line- exercised options over 43,334 shares of Miami International HoldingsSEC Form 44 September 2026Common Stock · traded 2 September 2026 · filed 4 September 2026
- exercised options over 4,666 shares of Miami International HoldingsSEC Form 44 September 2026Common Stock · traded 2 September 2026 · filed 4 September 2026
- ▼ sold on the open market 48,000 shares of Miami International HoldingsSEC Form 44 September 2026Common Stock · traded 2 September 2026 · filed 4 September 2026
- exercised options over 43,334 shares of Miami International Holdings (a derivative holding)SEC Form 44 September 2026Nonqualified Stock Option (Right to Buy) · traded 2 September 2026 · filed 4 September 2026
- exercised options over 4,666 shares of Miami International Holdings (a derivative holding)SEC Form 44 September 2026Nonqualified Stock Option (Right to Buy) · traded 2 September 2026 · filed 4 September 2026
- exercised options over 48,000 shares of Miami International HoldingsSEC Form 46 August 2026Common Stock · traded 4 August 2026 · filed 6 August 2026
- ▼ sold on the open market 48,000 shares of Miami International HoldingsSEC Form 46 August 2026Common Stock · traded 4 August 2026 · filed 6 August 2026
- exercised options over 48,000 shares of Miami International Holdings (a derivative holding)SEC Form 46 August 2026Nonqualified Stock Option (Right to Buy) · traded 4 August 2026 · filed 6 August 2026
- exercised options over 6,000 shares of Miami International HoldingsSEC Form 47 July 2026Common Stock · traded 2 July 2026 · filed 7 July 2026
- exercised options over 42,000 shares of Miami International HoldingsSEC Form 47 July 2026Common Stock · traded 2 July 2026 · filed 7 July 2026
- ▼ sold on the open market 48,000 shares of Miami International HoldingsSEC Form 47 July 2026Common Stock · traded 2 July 2026 · filed 7 July 2026
- exercised options over 6,000 shares of Miami International Holdings (a derivative holding)SEC Form 47 July 2026Nonqualified Stock Option (Right to Buy) · traded 2 July 2026 · filed 7 July 2026
- exercised options over 42,000 shares of Miami International Holdings (a derivative holding)SEC Form 47 July 2026Nonqualified Stock Option (Right to Buy) · traded 2 July 2026 · filed 7 July 2026
- was granted 23,298 shares of Miami International HoldingsSEC Form 418 June 2026Common Stock · traded 16 June 2026 · filed 18 June 2026
- was granted 2,485 shares of Miami International Holdings (a derivative holding)SEC Form 418 June 2026Incentive Stock Option (Right to Buy) · traded 16 June 2026 · filed 18 June 2026
- was granted 21,481 shares of Miami International Holdings (a derivative holding)SEC Form 418 June 2026Nonqualified Stock Option (Right to Buy) · traded 16 June 2026 · filed 18 June 2026
- had shares withheld for tax on 32,565 shares of Miami International HoldingsSEC Form 412 June 2026Common Stock · traded 11 June 2026 · filed 12 June 2026
- exercised options over 48,000 shares of Miami International HoldingsSEC Form 44 June 2026Common Stock · traded 2 June 2026 · filed 4 June 2026
- ▼ sold on the open market 48,000 shares of Miami International HoldingsSEC Form 44 June 2026Common Stock · traded 2 June 2026 · filed 4 June 2026
- exercised options over 48,000 shares of Miami International Holdings (a derivative holding)SEC Form 44 June 2026Nonqualified Stock Option (Right to Buy) · traded 2 June 2026 · filed 4 June 2026
- exercised options over 48,000 shares of Miami International HoldingsSEC Form 45 May 2026Common Stock · traded 4 May 2026 · filed 5 May 2026
- ▼ sold on the open market 48,000 shares of Miami International HoldingsSEC Form 45 May 2026Common Stock · traded 4 May 2026 · filed 5 May 2026
- exercised options over 48,000 shares of Miami International Holdings (a derivative holding)SEC Form 45 May 2026Nonqualified Stock Option (Right to Buy) · traded 4 May 2026 · filed 5 May 2026
- exercised options over 48,000 shares of Miami International HoldingsSEC Form 418 March 2026Common Stock · traded 17 March 2026 · filed 18 March 2026
- ▼ sold on the open market 48,000 shares of Miami International HoldingsSEC Form 418 March 2026Common Stock · traded 17 March 2026 · filed 18 March 2026
- exercised options over 48,000 shares of Miami International Holdings (a derivative holding)SEC Form 418 March 2026Nonqualified Stock Option (Right to Buy) · traded 17 March 2026 · filed 18 March 2026
- exercised options over 48,000 shares of Miami International Holdings (a derivative holding)SEC Form 418 March 2026Nonqualified Stock Option (Right to Buy) · traded 17 March 2026 · filed 18 March 2026
- exercised options over 48,000 shares of Miami International HoldingsSEC Form 418 March 2026Common Stock · traded 17 March 2026 · filed 18 March 2026
- ▼ sold on the open market 48,000 shares of Miami International HoldingsSEC Form 418 March 2026Common Stock · traded 17 March 2026 · filed 18 March 2026
- had shares withheld for tax on 32,565 shares of Miami International HoldingsSEC Form 420 February 2026Common Stock · traded 18 February 2026 · filed 20 February 2026
- had shares withheld for tax on 32,565 shares of Miami International HoldingsSEC Form 420 February 2026Common Stock · traded 18 February 2026 · filed 20 February 2026
- had shares withheld for tax on 108,550 shares of Miami International HoldingsSEC Form 412 February 2026Common Stock · traded 10 February 2026 · filed 12 February 2026
- had shares withheld for tax on 108,550 shares of Miami International HoldingsSEC Form 412 February 2026Common Stock · traded 10 February 2026 · filed 12 February 2026
- converted 500 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 387,296 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 16,666 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Incentive Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 16,666 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Incentive Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 19,710 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Incentive Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 19,710 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Incentive Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 150,000 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Nonqualified Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 150,000 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Nonqualified Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 133,334 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Nonqualified Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 133,334 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Nonqualified Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 200,000 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Nonqualified Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 200,000 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Nonqualified Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 130,290 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Nonqualified Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 130,290 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Nonqualified Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 150,000 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Nonqualified Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- exercised options over 150,000 shares of Miami International Holdings (a derivative holding)SEC Form 419 August 2025Nonqualified Stock Option (Right to Buy) · traded 15 August 2025 · filed 19 August 2025
- converted 500 shares of Miami International HoldingsSEC Form 419 August 2025Common Stock · traded 15 August 2025 · filed 19 August 2025
- converted 387,296 shares of Miami International HoldingsSEC Form 419 August 2025Common Stock · traded 15 August 2025 · filed 19 August 2025
- had shares withheld for tax on 21,710 shares of Miami International Holdings (a derivative holding)SEC Form 415 August 2025Nonvoting Common Stock · traded 13 August 2025 · filed 15 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.