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One of the Largest Global REITs and Its Subsidiary Form a New Joint Venture

Our marquee REIT and Tax teams advised American Tower Corporation (NYSE: AMT), one of the largest global REITs, and its subsidiary CoreSite in the formation of a new joint venture with Stonepeak, a leading alternative investment firm specializing in infrastructure and real property assets, to develop, build and operate an 18-megawatt data center in Denver, Colorado. CoreSite provides IT infrastructure that empowers enterprises and cloud, network and IT service providers to monetize and future-proof their digital businesses. The total estimated development costs for the 18-megawatt data center are expected to be more than $250 million.

Sullivan’s team was led by Ameek Ashok Ponda, director of the Tax Department, with Sullivan Tax partners Joel Carpenter and Sarah Wellings, and associate Connie Lee, contributing to the successful deal.

Ameek Ashok Ponda, Joel R. Carpenter, Sarah D. Wellings and Connie Lee

REIT Acquires Life Science Complex in Boston Seaport District

Sullivan represented Diversified Healthcare Trust (Nasdaq: DHC) in connection with the sale of a 10% equity interest in a two building life science complex located at 11 Fan Pier and 50 Northern Avenue in Boston, MA. DHC sold the interest to an existing joint venture partner for a purchase price of approximately $108 million. The purchase price for the 10% equity interest is based on a property valuation of $1.7 billion, less the $620 million of existing secured debt on the property. Sullivan provided counsel with respect to the initial JV formation and has continued to provide representation to the JV since 2017.

Avinash R. Rao and John M. Steiner

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Past Events

Sullivan & Worcester Attorneys Named to the 2026 Lawdragon 500 Leading Global Tax Lawyers Guide
When: June 17, 2026
People: Richard L. Jones, David J. Nagle and Ameek Ashok Ponda
Sullivan & Worcester Ranked in the Legal 500 United States 2026 Edition
When: June 15, 2026
People: Benjamin J. Armour, Victor N. Baltera, Howard E. Berkenblit, Harvey E. Bines, Ashley H. Brooks, Nicole M. Crum, Christopher C. Curtis, Patrick P. Dinardo, Angela Gomes, David A. Guadagnoli, Lewis J. Greenwald, Scott L. Kaufman, Karen J. Kepler, Caroline A. Kupiec, David M. Leahy, Natalie S. Lederman, Sharon G. Leifer, David C. Mahaffey, Anna Lea (Setz) McNerney, Louis A. Monti, David J. Nagle, Ameek Ashok Ponda, Eric J. Rietveld, Ryan M. Rosenblatt, Daniel P. Ryan, Gregory S. Sampson, Lewis N. Segall, Christopher K. Shields, Gerry Silver, Amy E. Sheridan, Laura A. Steinberg, John M. Steiner, Douglas S. Stransky, Michael T. Sullivan, Joel S. Telpner, Erika L. Todd, Ashley Tan, Sarah D. Wellings, Shu Wei and Amy A. Zuccarello
Sullivan & Worcester Ranked in Chambers USA 2026 Edition
When: June 4, 2026
People: Ashley H. Brooks, Cameron N. Cosby, David A. Guadagnoli, William C. Hanson, Richard L. Jones, David M. Leahy, David C. Mahaffey, Stephanie Monaco, Louis A. Monti, Ameek Ashok Ponda, Domenick Pugliese, Nicole Rives, Gregory S. Sampson, Amy E. Sheridan, Douglas S. Stransky, Sarah D. Wellings and Amy A. Zuccarello
Associates Emily Brewer and Brandon Schneider Accepted into 2026 LCLD Pathfinder Program
When: March 6, 2026
People: Emily D. Brewer and Brandon M. Schneider
Sullivan & Worcester Associate Chinyere S. Okogeri Selected for 2025 ACG Boston Accelerator Program
When: July 30, 2025
People: Chinyere S. Okogeri and Lewis N. Segall
IRS Makes a Move on Cloud Transaction Sourcing Rule
When: July 18, 2025
People: Ameek Ashok Ponda
Attys Tout 3 Real Estate Investment Wins In Federal Budget
When: July 16, 2025
People: Daniel P. Ryan and Sarah D. Wellings
Sullivan & Worcester Ranked in the Legal 500 United States 2025 Edition
When: June 13, 2025
People: Benjamin J. Armour, Victor N. Baltera, Howard E. Berkenblit, Ashley H. Brooks, John L. Chilton, Nicole M. Crum, Patrick P. Dinardo, Angela Gomes, David A. Guadagnoli, Lewis J. Greenwald, Scott L. Kaufman, Karen J. Kepler, Caroline A. Kupiec, David M. Leahy, Natalie S. Lederman, David C. Mahaffey, Anna Lea (Setz) McNerney, Louis A. Monti, David J. Nagle, Ameek Ashok Ponda, Domenick Pugliese, Avinash R. Rao, Eric J. Rietveld, Ryan M. Rosenblatt, Daniel P. Ryan, Gregory S. Sampson, Lewis N. Segall, Gerry Silver, Amy E. Sheridan, Laura A. Steinberg, John M. Steiner, Douglas S. Stransky, Joel S. Telpner, Erika L. Todd, Ashley Tan, Sarah D. Wellings and Shu Wei
Sullivan & Worcester Ranked in Chambers USA 2025 Edition
When: June 5, 2025
People: Ashley H. Brooks, Cameron N. Cosby, Patrick P. Dinardo, David A. Guadagnoli, Richard L. Jones, David M. Leahy, David C. Mahaffey, Stephanie Monaco, Louis A. Monti, Ameek Ashok Ponda, Domenick Pugliese, Nicole Rives, Gregory S. Sampson, Amy E. Sheridan, Douglas S. Stransky, Sarah D. Wellings and Amy A. Zuccarello
Three Sullivan & Worcester Attorneys Named to the Lawdragon 500 Leading Global Tax Lawyers Guide
When: May 28, 2025
People: David J. Nagle, Ameek Ashok Ponda and Richard L. Jones
Sullivan & Worcester Hires Fried Frank REIT Tax Pro
When: April 10, 2025
People: Cameron N. Cosby and Ameek Ashok Ponda
Sullivan Expands REIT and Tax Practices with New Partner in D.C.
When: April 10, 2025
People: Cameron N. Cosby
Boston Real Estate Times Announces 2024 Excellence Award Winners
When: August 14, 2024
People: Ameek Ashok Ponda
Sullivan REIT and Tax Teams Advise on $250 Million American Tower-Stonepeak Joint Venture
When: August 2, 2024
People: Joel R. Carpenter, Ameek Ashok Ponda, Sarah D. Wellings and Connie Lee
Sullivan Earns Top Rankings in the 2024 Edition of The Legal 500 United States
When: June 12, 2024
People: Benjamin J. Armour, Victor N. Baltera, Howard E. Berkenblit, Ashley H. Brooks, John L. Chilton, Johanna Colpritt, Nicole M. Crum, Christopher C. Curtis, Patrick P. Dinardo, Emily A. Goldschmidt, Angela Gomes, David A. Guadagnoli, William C. Hanson, John Hunt, Karen J. Kepler, Scott L. Kaufman, Caroline A. Kupiec, David M. Leahy, Natalie S. Lederman, David C. Mahaffey, David J. Nagle, Ameek Ashok Ponda, Domenick Pugliese, Eric J. Rietveld, Avinash R. Rao, Nicole Rives, Daniel P. Ryan, Gregory S. Sampson, Rachael L. Schwartz, Amy E. Sheridan, Douglas S. Stransky, Michael J. Student, John M. Steiner, Lewis N. Segall, Gerry Silver, Laura A. Steinberg, Marc L. Stern, Joel S. Telpner, Sarah D. Wellings and Amy A. Zuccarello
Sullivan & Worcester Ranked in the 2024 Edition of Chambers USA
When: June 6, 2024
People: Ashley H. Brooks, Patrick P. Dinardo, David A. Guadagnoli, Richard L. Jones, David M. Leahy, David C. Mahaffey, Ameek Ashok Ponda, Domenick Pugliese, Nicole Rives, Gregory S. Sampson, Amy E. Sheridan and Amy A. Zuccarello
Sullivan Hosts Mayor of Boston Michelle Wu and City Councilor Brian Worrell
When: May 23, 2024
People: Aidan F. Browne, Ashley H. Brooks and Ameek Ashok Ponda
Sullivan & Worcester Elevates Four to Partnership in U.S. & Israel
When: January 8, 2024
People: Charles E. Chambers Jr., Meghan Rohan, Amichay Tessler and Sarah D. Wellings
Sullivan Earns Top Rankings in the 2023 Edition of The Legal 500 United States
When: June 7, 2023
People: Benjamin J. Armour, Victor N. Baltera, Howard E. Berkenblit, Ashley H. Brooks, John L. Chilton, Nicole M. Crum, Patrick P. Dinardo, Emily A. Goldschmidt, David A. Guadagnoli, William C. Hanson, John Hunt, Richard L. Jones, Karen J. Kepler, Scott L. Kaufman, Caroline A. Kupiec, David M. Leahy, Natalie S. Lederman, David C. Mahaffey, David J. Nagle, Ameek Ashok Ponda, Domenick Pugliese, Avinash R. Rao, Nicole Rives, Daniel P. Ryan, Amy E. Sheridan, Gerry Silver, Laura A. Steinberg, John M. Steiner, Douglas S. Stransky, Joel S. Telpner, Lewis N. Segall and Matthew J. Van Wormer
Sullivan & Worcester Ranked in the 2023 Edition of Chambers USA
When: June 1, 2023
People: Ashley H. Brooks, Patrick P. Dinardo, David A. Guadagnoli, David M. Leahy, David C. Mahaffey, Ameek Ashok Ponda, Domenick Pugliese, Nicole Rives, Amy E. Sheridan and Amy A. Zuccarello

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