Gregory Jon Sullivan
CIK 1867146 · View on SEC EDGAR ↗
Insider
First SEC filing: June 15, 2021 · Latest: Oct. 1, 2025
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 52 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 |
|---|---|---|---|---|---|---|---|---|---|
| Sept. 30, 2025 | MTN | A | 10,514 | — | — | 10,514 Direct | — | Acquired | (price as of 2026-08-19) |
| Sept. 30, 2025 | MTN | A | 2,642 | — | — | 2,642 Direct | — | Acquired | (price as of 2026-08-19) |
| Sept. 29, 2025 | MTN | M | 368 | — | — | 368 Direct | -50.00% | Disposed | (price as of 2026-08-19) |
| Sept. 29, 2025 | MTN | M | 371 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-19) |
| Sept. 29, 2025 | MTN | M | 368 | — | — | 3,485 Direct | +11.81% | Acquired | (price as of 2026-08-19) |
| Sept. 29, 2025 | MTN | M | 371 | — | — | 3,117 Direct | +13.51% | Acquired | (price as of 2026-08-19) |
| Sept. 27, 2025 | MTN | M | 695 | — | — | 1,391 Direct | -33.32% | Disposed | (price as of 2026-08-19) |
| Sept. 27, 2025 | MTN | M | 695 | — | — | 2,746 Direct | +33.89% | Acquired | (price as of 2026-08-19) |
| Sept. 29, 2024 | MTN | M | 368 | — | — | 736 Direct | -33.33% | Disposed | (price as of 2026-08-19) |
| Sept. 29, 2024 | MTN | M | 371 | — | — | 371 Direct | -50.00% | Disposed | (price as of 2026-08-19) |
| Sept. 29, 2024 | MTN | F | 106 | $180.61 | $19,145 | 2,051 Direct | -4.91% | Disposed | -15.5% (price as of 2026-08-19) |
| Sept. 29, 2024 | MTN | M | 368 | — | — | 2,157 Direct | +20.57% | Acquired | (price as of 2026-08-19) |
| Sept. 29, 2024 | MTN | F | 107 | $180.61 | $19,325 | 1,789 Direct | -5.64% | Disposed | -15.5% (price as of 2026-08-19) |
| Sept. 29, 2024 | MTN | M | 371 | — | — | 1,896 Direct | +24.33% | Acquired | (price as of 2026-08-19) |
| Sept. 27, 2024 | MTN | A | 7,693 | — | — | 7,693 Direct | — | Acquired | (price as of 2026-08-19) |
| Sept. 27, 2024 | MTN | A | 2,086 | — | — | 2,086 Direct | — | Acquired | (price as of 2026-08-19) |
| Sept. 24, 2024 | MTN | M | 184 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-19) |
| Sept. 24, 2024 | MTN | F | 53 | $188.32 | $9,981 | 1,525 Direct | -3.36% | Disposed | -19.0% (price as of 2026-08-19) |
| Sept. 24, 2024 | MTN | M | 184 | — | — | 1,578 Direct | +13.20% | Acquired | (price as of 2026-08-19) |
| Sept. 29, 2023 | MTN | A | 3,663 | — | — | 3,663 Direct | — | Acquired | (price as of 2026-08-19) |
| Sept. 29, 2023 | MTN | A | 1,104 | — | — | 1,104 Direct | — | Acquired | (price as of 2026-08-19) |
| Sept. 29, 2023 | MTN | M | 371 | — | — | 742 Direct | -33.33% | Disposed | (price as of 2026-08-19) |
| Sept. 29, 2023 | MTN | F | 107 | $221.89 | $23,742 | 1,394 Direct | -7.13% | Disposed | -31.2% (price as of 2026-08-19) |
| Sept. 29, 2023 | MTN | M | 371 | — | — | 1,501 Direct | +32.83% | Acquired | (price as of 2026-08-19) |
| Sept. 25, 2023 | MTN | M | 96 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-19) |
| Sept. 25, 2023 | MTN | F | 28 | $243.31 | $6,813 | 1,130 Direct | -2.42% | Disposed | -37.3% (price as of 2026-08-19) |
| Sept. 25, 2023 | MTN | M | 96 | — | — | 1,158 Direct | +9.04% | Acquired | (price as of 2026-08-19) |
| Sept. 24, 2023 | MTN | F | 53 | $244.26 | $12,946 | 1,062 Direct | -4.75% | Disposed | -37.5% (price as of 2026-08-19) |
| Sept. 24, 2023 | MTN | M | 184 | — | — | 184 Direct | -50.00% | Disposed | (price as of 2026-08-19) |
| Sept. 24, 2023 | MTN | M | 184 | — | — | 1,115 Direct | +19.76% | Acquired | (price as of 2026-08-19) |
| Sept. 29, 2022 | MTN | A | 1,113 | — | — | 1,113 Direct | — | Acquired | (price as of 2026-08-19) |
| Sept. 29, 2022 | MTN | A | 3,877 | — | — | 3,877 Direct | — | Acquired | (price as of 2026-08-19) |
| Sept. 25, 2022 | MTN | M | 97 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-19) |
| Sept. 25, 2022 | MTN | M | 96 | — | — | 96 Direct | -50.00% | Disposed | (price as of 2026-08-19) |
| Sept. 25, 2022 | MTN | F | 29 | $208.17 | $6,037 | 931 Direct | -3.02% | Disposed | -26.7% (price as of 2026-08-19) |
| Sept. 25, 2022 | MTN | M | 97 | — | — | 960 Direct | +11.24% | Acquired | (price as of 2026-08-19) |
| Sept. 25, 2022 | MTN | F | 28 | $208.17 | $5,829 | 863 Direct | -3.14% | Disposed | -26.7% (price as of 2026-08-19) |
| Sept. 25, 2022 | MTN | M | 96 | — | — | 891 Direct | +12.08% | Acquired | (price as of 2026-08-19) |
| Sept. 24, 2022 | MTN | M | 184 | — | — | 368 Direct | -33.33% | Disposed | (price as of 2026-08-19) |
| Sept. 24, 2022 | MTN | F | 54 | $208.17 | $11,241 | 795 Direct | -6.36% | Disposed | -26.7% (price as of 2026-08-19) |
| Sept. 24, 2022 | MTN | M | 184 | — | — | 849 Direct | +27.67% | Acquired | (price as of 2026-08-19) |
| Sept. 27, 2021 | MTN | M | 288 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-19) |
| Sept. 27, 2021 | MTN | F | 83 | $344.01 | $28,553 | 665 Direct | -11.10% | Disposed | -55.7% (price as of 2026-08-19) |
| Sept. 27, 2021 | MTN | M | 288 | — | — | 748 Direct | +62.61% | Acquired | (price as of 2026-08-19) |
| Sept. 25, 2021 | MTN | M | 97 | — | — | 97 Direct | -50.00% | Disposed | (price as of 2026-08-19) |
| Sept. 25, 2021 | MTN | M | 95 | — | — | 192 Direct | -33.10% | Disposed | (price as of 2026-08-19) |
| Sept. 25, 2021 | MTN | F | 33 | $351.85 | $11,611 | 460 Direct | -6.69% | Disposed | -56.6% (price as of 2026-08-19) |
| Sept. 25, 2021 | MTN | M | 97 | — | — | 493 Direct | +24.49% | Acquired | (price as of 2026-08-19) |
| Sept. 25, 2021 | MTN | F | 27 | $351.85 | $9,500 | 396 Direct | -6.38% | Disposed | -56.6% (price as of 2026-08-19) |
| Sept. 25, 2021 | MTN | M | 95 | — | — | 423 Direct | +28.96% | Acquired | (price as of 2026-08-19) |
| Sept. 24, 2021 | MTN | A | 552 | — | — | 552 Direct | — | Acquired | (price as of 2026-08-19) |
| Sept. 24, 2021 | MTN | A | 1,896 | — | — | 1,896 Direct | — | Acquired | (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 |
|---|---|---|---|---|---|---|---|
| Sept. 30, 2025 | MTN | Share Appreciation Right | Common Stock (10,514) | $149.57 | Sept. 30, 2035 | 10,514 | Acquired |
| Sept. 30, 2025 | MTN | Restricted Share Unit | Common Stock (2,642) | $0.00 | — | 2,642 | Acquired |
| Sept. 29, 2025 | MTN | Restricted Share Unit | Common Stock (368) | $0.00 | — | 368 | Disposed |
| Sept. 29, 2025 | MTN | Restricted Share Unit | Common Stock (371) | $0.00 | — | 371 | Disposed |
| Sept. 27, 2025 | MTN | Restricted Share Unit | Common Stock (695) | $0.00 | — | 695 | Disposed |
| Sept. 29, 2024 | MTN | Restricted Share Unit | Common Stock (368) | $0.00 | — | 368 | Disposed |
| Sept. 29, 2024 | MTN | Restricted Share Unit | Common Stock (371) | $0.00 | — | 371 | Disposed |
| Sept. 27, 2024 | MTN | Share Appreciation Right | Common Stock (7,693) | $180.61 | Sept. 27, 2034 | 7,693 | Acquired |
| Sept. 27, 2024 | MTN | Restricted Share Unit | Common Stock (2,086) | $0.00 | — | 2,086 | Acquired |
| Sept. 24, 2024 | MTN | Restricted Share Unit | Common Stock (184) | $0.00 | — | 184 | Disposed |
| Sept. 29, 2023 | MTN | Share Appreciation Right | Common Stock (3,663) | $221.89 | Sept. 29, 2033 | 3,663 | Acquired |
| Sept. 29, 2023 | MTN | Restricted Share Unit | Common Stock (1,104) | $0.00 | — | 1,104 | Acquired |
| Sept. 29, 2023 | MTN | Restricted Share Unit | Common Stock (371) | $0.00 | — | 371 | Disposed |
| Sept. 25, 2023 | MTN | Restricted Share Unit | Common Stock (96) | $0.00 | — | 96 | Disposed |
| Sept. 24, 2023 | MTN | Restricted Share Unit | Common Stock (184) | $0.00 | — | 184 | Disposed |
| Sept. 29, 2022 | MTN | Restricted Share Unit | Common Stock (1,113) | $0.00 | — | 1,113 | Acquired |
| Sept. 29, 2022 | MTN | Share Appreciation Right | Common Stock (3,877) | $213.55 | Sept. 29, 2032 | 3,877 | Acquired |
| Sept. 25, 2022 | MTN | Restricted Share Unit | Common Stock (97) | $0.00 | — | 97 | Disposed |
| Sept. 25, 2022 | MTN | Restricted Share Unit | Common Stock (96) | $0.00 | — | 96 | Disposed |
| Sept. 24, 2022 | MTN | Restricted Share Unit | Common Stock (184) | $0.00 | — | 184 | Disposed |
| Sept. 27, 2021 | MTN | Restricted Share Unit | Common Stock (288) | $0.00 | — | 288 | Disposed |
| Sept. 25, 2021 | MTN | Restricted Share Unit | Common Stock (97) | $0.00 | — | 97 | Disposed |
| Sept. 25, 2021 | MTN | Restricted Share Unit | Common Stock (95) | $0.00 | — | 95 | Disposed |
| Sept. 24, 2021 | MTN | Restricted Share Unit | Common Stock (552) | $0.00 | — | 552 | Acquired |
| Sept. 24, 2021 | MTN | Share Appreciation Right | Common Stock (1,896) | $351.85 | Sept. 24, 2031 | 1,896 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 10 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| June 15, 2021 | MTN | Common Stock | 328 | Direct |
| June 15, 2021 | MTN | Share Appreciation Right→ Common Stock (3,260) | 3,260 | Direct |
| June 15, 2021 | MTN | Share Appreciation Right→ Common Stock (2,202) | 2,202 | Direct |
| June 15, 2021 | MTN | Restricted Share Unit→ Common Stock (72) | 72 | Direct |
| June 15, 2021 | MTN | Restricted Share Unit→ Common Stock (216) | 216 | Direct |
| June 15, 2021 | MTN | Share Appreciation Right→ Common Stock (1,792) | 1,792 | Direct |
| June 15, 2021 | MTN | Restricted Share Unit→ Common Stock (194) | 194 | Direct |
| June 15, 2021 | MTN | Share Appreciation Right→ Common Stock (3,599) | 3,599 | Direct |
| June 15, 2021 | MTN | Restricted Share Unit→ Common Stock (287) | 287 | Direct |
| June 15, 2021 | MTN | Share Appreciation Right→ Common Stock (4,007) | 4,007 | Direct |