Key Points Seaport Global analyst Jeff Campbell downgraded Oklo stock today. The analyst is now only neutral on Oklo stock -- after it's gained 15x in value in 12 months. Oklo has no profits or revenue. 10 stocks we like better than Oklo › Shares of Oklo (NYSE: OKLO), a start-up developer of "micro" nuclear reactors, suffered a downgrade to neutral at the hands of Seaport Global analyst Jeff Campbell, as StreetInsider.com reports today. The stock fell nearly 6% in early trading, but as of 10:40 ...