MACERICH CO — Director's Dealing 2015

May 15, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MACERICH CO (MAC)
CIK: 0000912242
Period of Report: 2015-05-13

Reporting Person: ONTARIO TEACHERS PENSION PLAN BOARD (Director, 10% Owner)
Reporting Person: 1700480 ONTARIO INC (Director, 10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-05-13	Common Stock, par value $0.01 per share	P	592416	$82.26	Acquired	21209186	Indirect
2015-05-14	Common Stock, par value $0.01 per share	P	862343	$83.30	Acquired	22071529	Indirect
2015-05-15	Common Stock, par value $0.01 per share	P	1026	$83.50	Acquired	22072555	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock, par value $0.01 per share	27682	Direct

Footnotes

F1: The price reported in Column 4 is a weighted average price. These shares of Common Stock were purchased in multiple transactions at prices ranging from $82.02 to $82.58, inclusive. The reporting persons undertake to provide The Macerich Company, any security holder of The Macerich Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnotes (1), (3) and (4) to this Form 4.

F2: 22,072,555 shares of Common Stock are owned directly by 1700480 Ontario Inc., which is a wholly owned subsidiary of Ontario Teachers' Pension Plan. Ontario Teachers' Pension Plan is an indirect beneficial owner of such reported securities.

F3: The price reported in Column 4 is a weighted average price. These shares of Common Stock were purchased in multiple transactions at prices ranging from $83.00 to $83.37, inclusive.

F4: Ontario Teachers' Pension Plan and 1700480 Ontario Inc. are directors by deputization for purposes of Section 16 of the Securities Exchange Act of 1934.