Which nontraded REIT program announced that its sponsor's three founding principals will invest 100% of their net after-tax compensation in 2018 in shares of the REIT?

Answer: Jeff Hanson, Danny Prosky, and Mathieu Streiff, along with the company’s executive vice presidents, entered into irrevocable stock purchase plans applicable to Griffin-American Healthcare REIT IV, Inc., a publicly registered, non-traded real estate investment trust co-sponsored by the firm and Griffin Capital Company, LLC. 

Under the terms of the plans, Hanson, Prosky, and Streiff agreed to invest 100 percent of the net after-tax cash compensation (base salary and annual bonus) they receive as executives of American Healthcare Investors directly into shares of Class I common stock of Griffin-American Healthcare REIT IV.