WALTHAM, MASS. — Newmark Knight Frank (NKF) has arranged the sale of Totten Pond Office Park, an office complex located in Waltham. Anchor Line Partners in a joint venture with Northwood Investors acquired the property from TA Realty for $51.5 million. Located at 400, 410 and 460 Totten Pond Road, the three-building office park was 87 percent leased to 43 tenants at the time of sale. On-site amenities for the office park include a cafeteria, fitness center, conference room and café. Robert Griffin, Edward Maher, Matthew Pullen, James Tribble and Samantha Hallowell of NKF represented the seller in the deal.