CEO Jeffrey Witherell says REIT focused on multi-tenant properties with staggered leases. Jeffrey Witherell, CEO of Plymouth Industrial REIT, Inc. (NYSE American: PLYM), joined Nareit in New York for a video interview at REITweek: 2019 Investor Conference. Plymouth recently raised about $56 million through the sale of common stock. Witherell said Plymouth used the proceeds to pay down its credit facility and will use the balance to purchase additional assets.