part a0iii item a010 .directors , executive officers and corporate governance for the information required by this item a010 with respect to our executive officers , see part a0i , item 1 .of this report .for the other information required by this item a010 , see 201celection of directors , 201d 201cnominees for election to the board of directors , 201d 201ccorporate governance 201d and 201csection a016 ( a ) beneficial ownership reporting compliance , 201d in the proxy statement for our 2019 annual meeting , which information is incorporated herein by reference .the proxy statement for our 2019 annual meeting will be filed within 120 a0days after the end of the fiscal year covered by this annual report on form 10-k .item a011 .executive compensation for the information required by this item a011 , see 201ccompensation discussion and analysis , 201d 201ccompensation committee report , 201d and 201cexecutive compensation 201d in the proxy statement for our 2019 annual meeting , which information is incorporated herein by reference .item a012 .security ownership of certain beneficial owners and management and related stockholder matters for the information required by this item a012 with respect to beneficial ownership of our common stock , see 201csecurity ownership of certain beneficial owners and management 201d in the proxy statement for our 2019 annual meeting , which information is incorporated herein by reference .the following table sets forth certain information as of december a031 , 2018 regarding our equity plans : plan category number of securities to be issued upon exercise of outstanding options , warrants and rights ( 1 ) weighted-average exercise price of outstanding options , warrants and rights number of securities remaining available for future issuance under equity compensation plans ( excluding securities reflected in column ( a ) ( b ) ( c ) equity compensation plans approved by security holders 1471449 $ 136.62 3578241 ( 1 ) the number of securities in column ( a ) include 22290 shares of common stock underlying performance stock units if maximum performance levels are achieved ; the actual number of shares , if any , to be issued with respect to the performance stock units will be based on performance with respect to specified financial and relative stock price measures .item a013 .certain relationships and related transactions , and director independence for the information required by this item a013 , see 201ccertain transactions 201d and 201ccorporate governance 201d in the proxy statement for our 2019 annual meeting , which information is incorporated herein by reference .item a014 .principal accounting fees and services for the information required by this item a014 , see 201caudit and non-audit fees 201d and 201caudit committee pre-approval procedures 201d in the proxy statement for our 2019 annual meeting , which information is incorporated herein by reference. .
[['plan category', 'number of securitiesto be issued uponexercise ofoutstanding options warrants and rights ( 1 ) ( a ) ( b )', 'weighted-averageexercise price ofoutstanding options warrants and rights', 'number of securitiesremaining available forfuture issuance underequity compensationplans ( excludingsecurities reflected in column ( a ) ) ( c )'], ['equity compensation plans approved by security holders', '1471449', '$ 136.62', '3578241']]
part a0iii item a010 .directors , executive officers and corporate governance for the information required by this item a010 with respect to our executive officers , see part a0i , item 1 .of this report .for the other information required by this item a010 , see 201celection of directors , 201d 201cnominees for election to the board of directors , 201d 201ccorporate governance 201d and 201csection a016 ( a ) beneficial ownership reporting compliance , 201d in the proxy statement for our 2019 annual meeting , which information is incorporated herein by reference .the proxy statement for our 2019 annual meeting will be filed within 120 a0days after the end of the fiscal year covered by this annual report on form 10-k .item a011 .executive compensation for the information required by this item a011 , see 201ccompensation discussion and analysis , 201d 201ccompensation committee report , 201d and 201cexecutive compensation 201d in the proxy statement for our 2019 annual meeting , which information is incorporated herein by reference .item a012 .security ownership of certain beneficial owners and management and related stockholder matters for the information required by this item a012 with respect to beneficial ownership of our common stock , see 201csecurity ownership of certain beneficial owners and management 201d in the proxy statement for our 2019 annual meeting , which information is incorporated herein by reference .the following table sets forth certain information as of december a031 , 2018 regarding our equity plans : plan category number of securities to be issued upon exercise of outstanding options , warrants and rights ( 1 ) weighted-average exercise price of outstanding options , warrants and rights number of securities remaining available for future issuance under equity compensation plans ( excluding securities reflected in column ( a ) ( b ) ( c ) equity compensation plans approved by security holders 1471449 $ 136.62 3578241 ( 1 ) the number of securities in column ( a ) include 22290 shares of common stock underlying performance stock units if maximum performance levels are achieved ; the actual number of shares , if any , to be issued with respect to the performance stock units will be based on performance with respect to specified financial and relative stock price measures .item a013 .certain relationships and related transactions , and director independence for the information required by this item a013 , see 201ccertain transactions 201d and 201ccorporate governance 201d in the proxy statement for our 2019 annual meeting , which information is incorporated herein by reference .item a014 .principal accounting fees and services for the information required by this item a014 , see 201caudit and non-audit fees 201d and 201caudit committee pre-approval procedures 201d in the proxy statement for our 2019 annual meeting , which information is incorporated herein by reference. .

Question: what percentage of securities to be issued upon exercise are shares of common stock underlying performance stock units if maximum performance levels are achieved?
Answer: 1.51%