Zanotti had five birdies Thursday while Jacquelin and Kaymer each had an eagle, five birdies and two bogeys.
The eagles were at the 484-yard, par-5 12th hole. They were among seven players to post eagles at the hole Thursday. Another 68, including Storm, had birdies at the hole.
Six players are tied for fifth at 4-under.
Storm has been a professional since 2000 but has just one tournament title -- the 2007 French Open -- to his credit.
He was very consistent Thursday. Starting on the second nine at the Hilversumsche Golf Course, Storm was two-under after just three holes. He added birdies at No. 16 and 18 and made the turn at 4-under.
His second nine began with four pars before he made a 2 at the par-3 fifth hole that pulled him into a tie for the lead. He moved in front alone with birdies at Nos. 7 and 8.
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