Douglas M. Schafer JR
CIK 2079445 · View on SEC EDGAR ↗
Insider
First SEC filing: Aug. 13, 2025 · Latest: June 18, 2026
On this page
Insider at
Insider transactions
0 buys (P)
3 sells (S)
Net:
$-6,228,960
+ 11 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
11 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Aug. 4, 2026 | MIAX | S 10b5-1 | 48,000 | $45.71 | $2,194,080 | 387,414 Direct | -11.02% | Disposed | -6.3% (price as of 2026-08-21) |
| July 2, 2026 | MIAX | S 10b5-1 | 48,000 | $41.22 | $1,978,560 | 387,414 Direct | -11.02% | Disposed | 3.9% (price as of 2026-08-21) |
| June 2, 2026 | MIAX | S | 48,000 | $42.84 | $2,056,320 | 396,681 | — | — | 0.0% (price as of 2026-08-21) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| Aug. 4, 2026 | MIAX | Nonqualified Stock Option (Right to Buy) | Common Stock (48,000) | $12.00 | May 17, 2028 | 48,000 | Disposed |
| July 2, 2026 | MIAX | Nonqualified Stock Option (Right to Buy) | Common Stock (42,000) | $12.00 | May 17, 2028 | 42,000 | Disposed |
| July 2, 2026 | MIAX | Nonqualified Stock Option (Right to Buy) | Common Stock (6,000) | $12.00 | Aug. 2, 2026 | 6,000 | Disposed |
| June 16, 2026 | MIAX | Nonqualified Stock Option (Right to Buy) | Common Stock (21,481) | $40.24 | June 15, 2036 | 21,481 | Acquired |
| June 16, 2026 | MIAX | Incentive Stock Option (Right to Buy) | Common Stock (2,485) | $40.24 | June 15, 2036 | 2,485 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 15 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Aug. 13, 2025 | MIAX | Common Stock | 150,000 | Direct |
| Aug. 13, 2025 | MIAX | Series B Preferred Stock→ Common Stock (500) | 500 | Direct |
| Aug. 13, 2025 | MIAX | Nonvoting Common Stock→ Common Stock (409,006) | 409,006 | Direct |
| Aug. 13, 2025 | MIAX | Incentive Stock Option (Right to Buy)→ Nonvoting Common Stock (16,666) | 16,666 | Direct |
| Aug. 13, 2025 | MIAX | Incentive Stock Option (Right to Buy)→ Nonvoting Common Stock (19,710) | 19,710 | Direct |
| Aug. 13, 2025 | MIAX | Incentive Stock Option (Right to Buy)→ Common Stock (10,080) | 10,080 | Direct |
| Aug. 13, 2025 | MIAX | Incentive Stock Option (Right to Buy)→ Common Stock (9) | 9 | Direct |
| Aug. 13, 2025 | MIAX | Nonqualified Stock Option (Right to Buy)→ Nonvoting Common Stock (150,000) | 150,000 | Direct |
| Aug. 13, 2025 | MIAX | Nonqualified Stock Option (Right to Buy)→ Nonvoting Common Stock (133,334) | 133,334 | Direct |
| Aug. 13, 2025 | MIAX | Nonqualified Stock Option (Right to Buy)→ Nonvoting Common Stock (200,000) | 200,000 | Direct |
| Aug. 13, 2025 | MIAX | Nonqualified Stock Option (Right to Buy)→ Nonvoting Common Stock (130,290) | 130,290 | Direct |
| Aug. 13, 2025 | MIAX | Nonqualified Stock Option (Right to Buy)→ Nonvoting Common Stock (150,000) | 150,000 | Direct |
| Aug. 13, 2025 | MIAX | Nonqualified Stock Option (Right to Buy)→ Common Stock (114,920) | 114,920 | Direct |
| Aug. 13, 2025 | MIAX | Nonqualified Stock Option (Right to Buy)→ Common Stock (100,000) | 100,000 | Direct |
| Aug. 13, 2025 | MIAX | Nonqualified Stock Option (Right to Buy)→ Common Stock (66,072) | 66,072 | Direct |