Financial giant AllianceBernstein is now closing in on a decision as to where it will regroup in New York City now that it has committed to moving its headquarters to Nashville.

Sources tell The Post that the firm has targeted and is negotiating with the Related venture at 50 Hudson Yards and with Tishman Speyer for The Spiral — which looks like it may be getting the thumbs-up.

The company previously considered 2 Manhattan West, the RealDeal reported in May, where it could have anchored the next office tower. It also looked Downtown at Brookfield Place, sources said.

It is also keeping an eye on its current headquarters at 1345 Sixth Ave., where, according to CoStar, it leases 854,705 square feet that expires in 2024 but does not occupy all that space. Owner Fisher Bros. is also in the middle of revamping this older building.

“It’s about the future of its workplace and its image,” said one person who is familiar with the search but not authorized to speak on the record.

“These are very high-quality new construction buildings with extraordinary spaces, glass and infrastructure.”

AllianceBernstein’s City requirement is for 200,000 to 250,000 square feet.

All the buildings are rolling out the red carpet for large tenants but still must cover their costs.

To date, Bjarke Ingels-designed, 2.8 million-square-foot tower at 66 Hudson Blvd., known as The Spiral for its dramatic, swirling terraces, sits on the north side of West 34th Street. So far, Pfizer has signed for 800,000 square feet on the seventh through 21st floors of the 65-story tower, which will rise to 1,031 feet.

The Spiral is due to be delivered for shaping by tenants in 2021 with occupancy the following year.

The Foster + Partners-designed, 58-story 50 Hudson Yards is expected to be finished in 2022. This Related, Oxford Properties and Mitsui Fudosan-owned 2.9 million-square-foot tower sits directly across West 34th Street with an entrance on West 33rd.

One sticky issue is that a competitor, BlackRock, has already committed to 846,990 square feet on the lower block of floors, but one source dismissed that as a “non-issue.” The 21st floor is a building Sky Lobby and amenity center that includes massage stations.

Back in May, AllianceBernstein announced it was moving its headquarters and 1,050 employees to Nashville.

In October, represented by a Newmark Knight Frank team of Neil Goldmacher, Brian Goldman and Jared Horowitz, AllianceBernstein signed a lease for more than half of a new 371,000-square-foot building under construction at 501 Commerce St.

The building is expected to open in 2020 as part of a 6.2-acre Fifth + Broadway mixed-use project being developed by OliverMcMillan and Spectrum|Emery on the site of the former convention center.

Here it will occupy 205,000 square feet on the top 18 to 25 floors plus have a large logo on the outside that will afford it a prominent place on Nashville’s skyline.

“From a price perspective it’s very attractive relative to what we anticipated and what we expected to see here in New York,” President and CEO Seth Bernstein said at a Goldman Sachs investor conference on Tuesday.

Average asking rents in new Class A buildings in downtown Nashville were $29.89 per foot during the third quarter of 2018, Cushman & Wakefield reported, compared to $67.80 in the Penn Station/Hudson Yards submarket — but the newest Big Apple towers could have asking rents around $100 per foot.

Bernstein said 69 employees are already stationed in a Nashville WeWork, with more joining them next year. “My custom cowboy boots are not finished,” he said. “They take time.”

Notably, Bernstein said they are attracting “talented people” from Chicago, Atlanta and Dallas.

“The level of turnover as a consequence of it [the move to Nashville] has been lower than we would expect; but we’re in the early stages of this game,” Bernstein added.

Spokesmen and spokeswomen for the various companies either declined comment or could not be reached.