The 2019 Ram also marks a major improvement over the previous-generation Ram, which only scored the second-lowest rating of "Marginal" in the driver small overlap test. The passenger side wasn't tested. The old Ram also only had a "Marginal" roof strength rating.
In addition to having great crash test results, the Ram 1500 also earned the best possible rating for its optional forward collision prevention technology. It was capable of bringing the truck to a complete stop, avoiding a collision at speeds up to 25 mph.
The Ram's only weak point was its headlights, which were rated "Marginal" at best. Because of the headlight performance, the IIHS didn't give it a Top Safety Pick award. This is a weak point for most trucks, as the only ones with headlight ratings above "Marginal" are the Honda Ridgeline and the 2018 GMC Sierra. The Ridgeline is also the only pickup tested by the organization to receive the Top Safety Pick award. With that being said, both the 2019 Ram 1500 as well as the 2018 Ford F-150 should qualify for the Top Safety Pick award if headlight performance improves.
Note that the collision prevention and headlight ratings also apply to the Ram 1500 Quad Cab, but that the crash ratings do not. It's likely the IIHS will test that in the future.