John Casimir Florek
CIK 2074273 · View on SEC EDGAR ↗
Insider
First SEC filing: March 23, 2026 · Latest: March 23, 2026
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 4 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
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| March 19, 2026 | MUX | A | 479 | — | — | 1,790 Direct | +36.54% | Acquired | (price as of 2026-08-21) |
| Nov. 10, 2025 | MUX | A | 585 | — | — | 1,311 Direct | +80.58% | Acquired | (price as of 2026-08-21) |
| Sept. 8, 2025 | MUX | A | 726 | — | — | 726 Direct | — | Acquired | (price as of 2026-08-21) |
| Aug. 11, 2025 | MUX | A | 10,000 | — | — | 10,000 Direct | — | Acquired | (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 |
|---|---|---|---|---|---|---|---|
| March 19, 2026 | MUX | Deferred Stock Units | Common Stock (479) | — | — | 479 | Acquired |
| Nov. 10, 2025 | MUX | Deferred Stock Units | Common Stock (585) | — | — | 585 | Acquired |
| Sept. 8, 2025 | MUX | Deferred Stock Units | Common Stock (726) | — | — | 726 | Acquired |
| Aug. 11, 2025 | MUX | Stock Option (right to buy) | Common Stock (10,000) | $10.43 | Aug. 11, 2030 | 10,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).