There are now 6,300 workers on site, compared with 1,500 at the height of the pandemic last year.
Final contracts for Hinkley Point C were signed five years ago.
Since then, 3,600 British companies have won contracts on the project.
This includes more than 400 businesses in the north of England where spending so far has reached £1.2 billion.
Managing director Stuart Crooks said: “Hinkley Point C is essential in the fight against climate change and for Britain’s energy security.
“It is delivering on its promise of boosting British jobs, skills and industry right across the country.
“Covid-19 has challenged the project and its suppliers and I am proud of the enormous efforts made to keep the site safe and moving ahead.
“As we emerge from the worst of the pandemic, we can now create more jobs as we step up construction and manufacturing for the next phase of the project.”
Register for free to continue reading
Registration is a free and easy way to support our truly independent journalism
By registering, you will also enjoy limited access to Premium articles, exclusive newsletters, commenting, and virtual events with our leading journalists
Already have an account? sign in