Tabb Group, the Wall Street consulting firm founded by former Lehman Brothers executive Larry Tabb, is looking to sell a stake to a strategic investor, The Post has learned.

Lean times on Wall Street have squeezed investors this year, cutting into the firm’s revenue, said a source briefed on the company’s plans. It’s not clear how much the company would raise from selling a stake.

Tabb declined to comment.

Tabb Group, founded in 2003, is a bit of a hybrid for Wall Street consulting firms. It provides research for investors on capital markets and also aggregates news and opinions in its own forums.

Tabb, who was previously a vice president managing research at TowerGroup before starting his own consultancy, has not been shy about weighing in on hot-button issues.

He was an outspoken opponent of IEX, the upstart “Flash Boys” stock exchange that eventually won Securities and Exchange approval, and met with SEC Commissioner Kara Stein to discuss his views in February, according to regulatory records.