part iii item 10 . directors , and executive officers and corporate governance . pursuant to section 406 of the sarbanes-oxley act of 2002 , we have adopted a code of ethics for senior financial officers that applies to our principal executive officer and principal financial officer , principal accounting officer and controller , and other persons performing similar functions . our code of ethics for senior financial officers is publicly available on our website at www.hologic.com . we intend to satisfy the disclosure requirement under item 5.05 of current report on form 8-k regarding an amendment to , or waiver from , a provision of this code by posting such information on our website , at the address specified above . the additional information required by this item is incorporated by reference to our definitive proxy statement for our annual meeting of stockholders to be filed with the securities and exchange commission within 120 days after the close of our fiscal year . item 11 . executive compensation . the information required by this item is incorporated by reference to our definitive proxy statement for our annual meeting of stockholders to be filed with the securities and exchange commission within 120 days after the close of our fiscal year . item 12 . security ownership of certain beneficial owners and management and related stockholder matters . we maintain a number of equity compensation plans for employees , officers , directors and others whose efforts contribute to our success . the table below sets forth certain information as of the end of our fiscal year ended september 27 , 2008 regarding the shares of our common stock available for grant or granted under stock option plans and equity incentives that ( i ) were approved by our stockholders , and ( ii ) were not approved by our stockholders . the number of securities and the exercise price of the outstanding securities have been adjusted to reflect our two-for-one stock splits effected on november 30 , 2005 and april 2 , 2008 . equity compensation plan information plan category number of securities to be issued upon exercise of outstanding options , warrants and rights 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 ) ) equity compensation plans approved by security holders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15370814 $ 16.10 19977099 equity compensation plans not approved by security holders ( 1 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 582881 $ 3.79 2014 .
what portion of the total number of issued securities is approved by security holders?
( 1 ) includes the following plans : 1997 employee equity incentive plan and 2000 acquisition equity incentive plan . a description of each of these plans is as follows : 1997 employee equity incentive plan . the purposes of the 1997 employee equity incentive plan ( the 201c1997 plan 201d ) , adopted by the board of directors in may 1997 , are to attract and retain key employees , consultants and advisors , to provide an incentive for them to assist us in achieving long-range performance goals , and to enable such person to participate in our long-term growth . in general , under the 1997 plan , all employees .