Keystone REIT Inc.

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

Beneficial ownership report for a holder of more than 5% (Schedule 13D)

Entry into a Material Definitive Agreement

Prospectus Supplement with Pricing Information

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration of Securities on Exchange

Notice of Effectiveness

Certification of approval for listing and registration on a national securities exchange

Registration of securities of certain real estate companies (amendment)

Registration of securities of certain real estate companies (amendment)

Registration of securities of certain real estate companies (amendment)

Registration of securities of certain real estate companies

Draft registration statement (confidential submission) (amendment)

Draft registration statement (confidential submission) (amendment)

Bartlett Thomas A

Morefield Diane M

Myers Mark Laurence

Capossela Christopher C

Myers Mark Laurence

Mouat Rory

Forman Michael John

Keenan Katharine A

Marone Anthony F. JR

Bartlett Thomas A

Morefield Diane M

SCHWARZMAN STEPHEN A; Blackstone Inc.; Blackstone Group Management L.L.C.; Blackstone Holdings III L.P.; Blackstone Holdings III GP L.P.; Blackstone Holdings III GP Management L.L.C.; Blackstone Treasury Holdings III L.L.C.

Pell Nicholas L.

Diverio Michael A.