EXHIBIT 3.1.27

ADMITTED PARTNERS OF

BRANDYWINE OPERATING PARTNERSHIP, L.P.

AS OF DECEMBER 31, 2011

Jack R. Loew

Brandywine Holdings I, Inc.

Brandywine Realty Trust

R. Randle Scarborough

M. Sean Scarborough

Steven L. Shapiro

Robert K. Scarborough

Brookstone Investors, LLC

Brookstone Holdings of Delaware 4, LLC

Brookstone Holdings of Delaware 5, LLC

Brookstone Holdings of Delaware 6, LLC

Estate of Calvin Axinn

Hirshman Family Trust

Trust UTW of Theodore Geffner

Gloria Kantor

Helen Geffner

Howard Kantor

Leo Guthart

Leonard Axinn

Estate of Donald E. Axinn

William H. Goodwin, Jr.

TRC Associates Limited Partnership

Steven A. Stattner

The F.M. (Bruce) Brusseau Trust

Newport National Corporation

Scott R. Brusseau

Jeffrey A. Brusseau

D. Kent Dahlke

Kenneth L. Hatfield

Michael G. Tombari

James J. Gorman

Christopher J. Knauer

The Jon Q. Reynolds and Ann S. Reynolds Family Trust

The David A. Brown Family Trust

The Revocable Trust Declaration of Thomas K. Terrill and Susan Jean Terrill

The Redford Family Trust

The Judith B. Brown 1992 Trust

The Peter M. Reynolds and Christina A. Reynolds Family Trust

C. Thomas Martz

Karen Leigh Brown

Tara Lynne Brown

Kristen Ann Brown

The Reynolds Family Partners

GENERAL PARTNER

Brandywine Realty Trust