Nathan Mark Gronberg

CIK 1826321 · View on SEC EDGAR ↗

Insider

First SEC filing: Oct. 1, 2020 · Latest: Oct. 1, 2025

On this page

Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 60 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

60 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
Sept. 29, 2021 MTN S 175 $343.89 $60,181 121 Direct -59.12% Disposed -55.6% (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 (4,334) $149.57 Sept. 30, 2035 4,334 Acquired
Sept. 30, 2025 MTN Restricted Share Unit Common Stock (2,249) $0.00 — 2,249 Acquired
Sept. 29, 2025 MTN Restricted Share Unit Common Stock (222) $0.00 — 222 Disposed
Sept. 29, 2025 MTN Restricted Share Unit Common Stock (269) $0.00 — 269 Disposed
Sept. 27, 2025 MTN Restricted Share Unit Common Stock (344) $0.00 — 344 Disposed
Sept. 29, 2024 MTN Restricted Share Unit Common Stock (222) $0.00 — 222 Disposed
Sept. 29, 2024 MTN Restricted Share Unit Common Stock (268) $0.00 — 268 Disposed
Sept. 27, 2024 MTN Share Appreciation Right Common Stock (3,171) $180.61 Sept. 27, 2034 3,171 Acquired
Sept. 27, 2024 MTN Restricted Share Unit Common Stock (1,032) $0.00 — 1,032 Acquired
Sept. 24, 2024 MTN Restricted Stock Units Common Stock (123) $0.00 — 123 Disposed
Sept. 29, 2023 MTN Share Appreciation Right Common Stock (2,208) $221.89 Sept. 29, 2033 2,208 Acquired
Sept. 29, 2023 MTN Restricted Share Unit Common Stock (666) $0.00 — 666 Acquired
Sept. 29, 2023 MTN Restricted Share Unit Common Stock (268) $0.00 — 268 Disposed
Sept. 29, 2023 MTN Restricted Share Unit Common Stock (87) $0.00 — 87 Disposed
Sept. 24, 2023 MTN Restricted Stock Units Common Stock (122) $0.00 — 122 Disposed
Sept. 29, 2022 MTN Restricted Share Unit Common Stock (87) $0.00 — 87 Disposed
Sept. 29, 2022 MTN Restricted Share Unit Common Stock (805) $0.00 — 805 Acquired
Sept. 29, 2022 MTN Share Appreciation Right Common Stock (2,337) $213.55 Sept. 29, 2032 2,337 Acquired
Sept. 25, 2022 MTN Restricted Share Unit Common Stock (86) $0.00 — 86 Disposed
Sept. 24, 2022 MTN Restricted Share Unit Common Stock (122) $0.00 — 122 Disposed
Feb. 1, 2022 MTN Restricted Share Unit Common Stock (68) $0.00 — 68 Disposed
Sept. 29, 2021 MTN Restricted Share Unit Common Stock (87) $0.00 — 87 Disposed
Sept. 25, 2021 MTN Restricted Share Unit Common Stock (86) $0.00 — 86 Disposed
Sept. 24, 2021 MTN Restricted Share Unit Common Stock (367) $0.00 — 367 Acquired
Sept. 24, 2021 MTN Share Appreciation Right Common Stock (1,262) $351.85 Sept. 24, 2031 1,262 Acquired
Feb. 1, 2021 MTN Restricted Share Unit Common Stock (68) $0.00 — 68 Disposed
Sept. 29, 2020 MTN Restricted Share Unit Common Stock (261) $0.00 — 261 Acquired
Sept. 29, 2020 MTN Share Appreciation Right Common Stock (3,620) $214.09 Sept. 29, 2030 3,620 Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 6 holdings

Securities held when first becoming an insider, per SEC Form 3.

Date Ticker Security Shares Ownership
Oct. 1, 2020 MTN Common Stock 130 Direct
Oct. 1, 2020 MTN Restricted Share Unit→ Common Stock (136) 136 Direct
Oct. 1, 2020 MTN Restricted Share Unit→ Common Stock (172) 172 Direct
Oct. 1, 2020 MTN Common Stock 130 Direct
Oct. 1, 2020 MTN Restricted Share Unit→ Common Stock (136) 136 Direct
Oct. 1, 2020 MTN Restricted Share Unit→ Common Stock (172) 172 Direct