Gulfstream G600
N408SB · ICAO: A4CBEB · Heavy jet
Fuel burn
440 gal/hr
CO₂ per hour
4,227 kg
Car miles equiv.
10,462
TechCelebrity profile
Mark Stevens Private jet tracker
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Mark Stevens spent more than two decades as a partner at Sequoia Capital, where he was a managing partner and sat on boards including Nvidia's, and now invests through his family office, S-Cubed Capital. He is also a minority owner of the Golden State Warriors.
In September 2026 he became the largest minority investor in the Seattle Seahawks, behind only the Khosla family, in the $9.612B purchase of the team from the Paul G. Allen estate.
N408SB is a 2025 Gulfstream G600, S/N 73185, hex A4CBEB. The FAA names LETS GO NOW LLC at an Apres Ski Way address in Steamboat Springs, Colorado; the tie to Stevens is through the LLC's ownership rather than the registry itself. It was at Boeing Field for the Seahawks' home win over the Chargers.
The Yampa Valley base is read off the Steamboat registry address, not observed; Bay Area fields and Boeing Field on game days are the likelier pattern.
Note · We track Mark Stevens's planes, not Mark Stevens in person. Flight data shows when and where each plane flew. It does not show who was on board.
Aircraft owner
Lets Go Now LLC (Steamboat Springs CO)
Home base
Yampa Valley (Hayden) (KHDN · HDN)
Frequent destinations
KBFIKSJC
Where is Mark Stevens's private jet right now?
We have not tracked a flight for Mark Stevens's private jet yet. When it flies, it will show up here and on our live map. Follow it on the live jet tracker map.
What private jet does Mark Stevens own?
We track one private jet for Mark Stevens: a Gulfstream G600 with tail number N408SB.
Where has Mark Stevens's private jet flown?
No flights recorded yet
We log a flight when a receiver picks up the plane's ADS-B signal. Check back soon.
Mark Stevens private jet FAQ
Does Mark Stevens have a private jet?
Yes. We track 1 plane linked to Mark Stevens: a Gulfstream G600 (N408SB). The plane is registered to Lets Go Now LLC (Steamboat Springs CO), not to Mark Stevens. The flight log on this page comes from public ADS-B signals. It shows where the plane went, not who was on board.
What plane does Mark Stevens fly on?
Mark Stevens flies a Gulfstream G600. Its tail number is N408SB. You can track it live on this page, along with its flight history and CO₂.
How many planes does Mark Stevens fly on?
Mark Stevens flies on 1 tracked plane: N408SB (Gulfstream G600). The plane is registered to Lets Go Now LLC (Steamboat Springs CO), not to Mark Stevens. That count only covers planes we can tie to Mark Stevens through public registration and ADS-B records. A plane held through an undisclosed company, or one that is chartered, would not show up here.
What kind of plane does Mark Stevens fly?
Mark Stevens flies a Gulfstream G600, tail number N408SB. It is in the Ultra Long Range class. It can fly 6,600 nautical miles without stopping and seats up to 19 people. The plane is registered to Lets Go Now LLC (Steamboat Springs CO), not to Mark Stevens.
What is Mark Stevens's private jet tail number?
Mark Stevens's private jet tail number is N408SB. The plane is a Gulfstream G600. Each tail number links to a live tracking page. There you can see the plane's flight history, fuel burn and CO₂.
How much CO₂ does Mark Stevens's jet emit per hour?
About 4,227 kg for every hour in the air. Mark Stevens's Gulfstream G600 (N408SB) burns roughly 440 gallons of jet fuel an hour. That is about the same CO₂ as driving an average car 10,462 miles.
Owner matches come from the FAA registry, adsb.lol (ODbL) and ADSB.fi data, and SEC filings. They may be incomplete or out of date. Methodology · Report an error. For observational use only.