Network security product maker Palo Alto Networks had a strong first day on the NYSE Friday, closing up at $53.13 per share after it priced above its proposed range (like Kayak) at $42. The range was raised to $38 to $40 from an initial $34 to $37. Palo Alto Network's non-selling shareholders include Greylock Partners, Sequoia Capital and Globespan Capital Partners.
