Natural gas pipeline and storage provider DT Midstream Inc. (DTM) said it would ramp up investments in new projects over five years and held up as a key example a new endeavor in the Haynesville Shale to capitalize on mounting demand for liquefied natural gas (LNG).

The Detroit-based midstream company, with a portfolio that includes 900 miles of regulated interstate gas pipelines and more than 1,000 miles of gathering lines, said Friday it would invest between $1.2 billion to $1.7 billion as part of a five-year growth plan.

“We have executed new agreements” that “will result in a multi-year investment in connecting increasing Haynesville supply to growing LNG export demand,” CEO David Slater said Friday during an earnings call with analysts. “The fundamentals around...