Thomas P. Gallagher

CIK 2080477 · View on SEC EDGAR ↗

Insider Activist

First SEC filing: Aug. 13, 2025 · Latest: June 18, 2026

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Insider at

Insider transactions

0 buys (P) 5 sells (S) Net: $-11,101,361 + 12 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

12 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
Aug. 4, 2026 MIAX S 10b5-1 48,334 $45.69 $2,208,380 1,723,275 Indirect -2.73% Disposed -8.6% (price as of 2026-08-19)
July 13, 2026 MIAX S 10b5-1 70,000 $42.52 $2,976,400 1,723,275 Indirect -3.90% Disposed -1.8% (price as of 2026-08-19)
July 7, 2026 MIAX S 10b5-1 28,228 $42.27 $1,193,198 1,723,275 Indirect -1.61% Disposed -1.2% (price as of 2026-08-19)
July 6, 2026 MIAX S 10b5-1 41,772 $42.09 $1,758,183 1,723,275 Indirect -2.37% Disposed -0.8% (price as of 2026-08-19)
June 2, 2026 MIAX S 70,000 $42.36 $2,965,200 1,723,275 — — -1.4% (price as of 2026-08-19)

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 (48,334) $12.00 May 28, 2028 48,334 Disposed
July 13, 2026 MIAX Nonqualified Stock Option (Right to Buy) Common Stock (70,000) $12.00 Aug. 2, 2026 70,000 Disposed
July 7, 2026 MIAX Nonqualified Stock Option (Right to Buy) Common Stock (28,228) $12.00 Aug. 2, 2026 28,228 Disposed
July 6, 2026 MIAX Nonqualified Stock Option (Right to Buy) Common Stock (41,772) $12.00 Aug. 2, 2026 41,772 Disposed
June 16, 2026 MIAX Nonqualified Stock Option (Right to Buy) Common Stock (237,175) $40.24 June 15, 2036 237,175 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 1,904,599 Indirect
Aug. 13, 2025 MIAX Series B Preferred Stock→ Common Stock (500) 500 Indirect
Aug. 13, 2025 MIAX Nonvoting Common Stock→ Common Stock (573,963) 573,963 Direct
Aug. 13, 2025 MIAX Nonvoting Common Stock→ Common Stock (135,395) 135,395 Indirect
Aug. 13, 2025 MIAX Incentive Stock Option (Right to Buy)→ Nonvoting Common Stock (24,999) 24,999 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 (8,333) 8,333 Direct
Aug. 13, 2025 MIAX Incentive Stock Option (Right to Buy)→ Nonvoting Common Stock (13,140) 13,140 Direct
Aug. 13, 2025 MIAX Incentive Stock Option (Right to Buy)→ Common Stock (13,392) 13,392 Direct
Aug. 13, 2025 MIAX Nonqualified Stock Option (Right to Buy)→ Nonvoting Common Stock (350,001) 350,001 Indirect
Aug. 13, 2025 MIAX Nonqualified Stock Option (Right to Buy)→ Nonvoting Common Stock (283,334) 283,334 Indirect
Aug. 13, 2025 MIAX Nonqualified Stock Option (Right to Buy)→ Nonvoting Common Stock (241,667) 241,667 Indirect
Aug. 13, 2025 MIAX Nonqualified Stock Option (Right to Buy)→ Nonvoting Common Stock (286,860) 286,860 Indirect
Aug. 13, 2025 MIAX Nonqualified Stock Option (Right to Buy)→ Nonvoting Common Stock (375,000) 375,000 Indirect
Aug. 13, 2025 MIAX Nonqualified Stock Option (Right to Buy)→ Common Stock (97,858) 97,858 Indirect