ST. LOUIS — Private jet companies are investing big in the St. Louis region.

Jet-maker Gulfstream Aerospace Corp., headquartered in Savannah, Georgia, in May finished a $28.5 million investment in its facility at the St. Louis Downtown Airport in the Metro East.

And at East Alton’s St. Louis Regional Airport, aircraft maintenance, repair and overhaul provider West Star Aviation opened a new 76,000 square feet hangar last year, adding “state-of-the-art” equipment in what the company said was a $20 million investment.

Both companies said they have added or are adding scores of jobs.

The aerospace industry in St. Louis has collectively announced over $5 billion in recent investments , including the planned $2.8 billion terminal expansion at Lambert St. Louis International Airport

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