NAME AND ADDRESS OF BENEFICIAL OWNER
AMOUNT AND NATURE OF BENEFICIAL OWNERSHIP(1)(2)
PERCENTAGE OF COMMON STOCK BENEFICIALLY OWNED(2)
Executive Officers and Directors:
Corey M. Horowitz(3)
6,862,752
28.0%
CMH Capital Management Corp(4)
2,291,372
9.5%
Niv Harizman(5)
245,985
1.0%
Emanuel Pearlman (6)
112,059
*
David C. Kahn(7)
94,160
*
Allison Hoffman(8)
75,811
*
Jonathan E. Greene(9)
67,499
*
All officers and directors as a group  (6 Persons)
7,458,266
30.4%
5% Stockholders:
Steven D. Heinemann(10)
2,827,815
11.8%
Goose Hill Capital LLC(11)
2,242,582
9.3%
John Herzog(12)
1,200,130
5.0%
item 12 .
security ownership of certain beneficial owners and management and related stockholder matters .
the following table sets forth information regarding the beneficial ownership of our common stock as of march 1 2020 for -i each of our directors -ii each of our executive officers -iii each person known by us to be the beneficial owner of more than 5 % of our outstanding shares of common stock and -iv all of our executive officers and directors as a group .
* less than 1 % .
-1 unless otherwise indicated we believe that all persons named in the above table have sole voting and investment power with respect to all shares of our common stock beneficially owned by them .
unless otherwise indicated the address for each listed beneficial owner is c / o network-1 technologies inc .
445 park avenue suite 912 new york new york 10022 .
-2 a person is deemed to be the beneficial owner of shares of common stock that can be acquired by such person within 60 days from march 1 2020 upon the exercise of options or restricted stock units that vest within such 60 day period .
each beneficial owner ' s percentage ownership is determined by assuming that all stock options and restricted stock units held by such person -but not those held by any other person and which are exercisable or vested within 60 days from march 1 2020 have been exercised and vested .
assumes a base of 24032941 shares of our common stock outstanding as of march 1 2020 .
-3 includes -i 3549369 shares of common stock held by mr .
horowitz -ii 500000 shares of common stock subject to currently exercisable stock options held by mr .
horowitz -iii 2157097 shares of common stock held by cmh capital management corp .
an entity solely owned by mr .
horowitz -iv 134275 shares of common stock owned by the cmh capital management corp .
profit sharing plan of which mr .
horowitz is the trustee -v 67470 shares of common stock owned by donna slavitt the wife of mr .
horowitz -vi an aggregate of 452250 shares of common stock held by two trusts and a custodian account for the benefit of mr .
horowitz ’ s three children and -vii 2291 shares of common stock held by horowitz partners a general partnership of which mr .
horowitz is a partner .
does not include 250000 shares of common stock subject to restricted stock units that do not vest within 60 days of march 1 2020 .
-4 includes 2157097 shares of common stock owned by cmh capital management corp .
and 134275 shares of common stock owned by cmh capital management corp .
profit sharing plan .
corey m .
horowitz by virtue of being the sole officer director and shareholder of cmh capital management corp .
and the trustee of the cmh capital management corp .
profit sharing plan has the sole power to vote and dispose of the shares of common stock owned by cmh capital management corp .
and the cmh capital management corp .
profit sharing plan .
-5 includes -i 242235 shares of common stock and -ii 3750 shares of common stock subject to restricted stock units that vest within 60 days of march 1 2020 .
does not include 11250 shares of common stock subject to restricted stock units that do not vest within 60 days from march 1 2020 .
-6 includes -i 108309 shares of common stock and -ii 3750 shares of common stock subject to restricted stock units that vest within 60 days of march 1 2020 .
does not include 11250 shares of common stock subject to restricted stock units that do not vest within 60 days from march 1 2020 .
-7 includes 94160 shares of common stock .
does not include 27500 shares of common stock subject to restricted stock units owned by mr .
kahn that do not vest within 60 days from march 1 2020 .
-8 includes -i 72061 shares of common stock and -ii 3750 shares of common stock subject to restricted stock units that vest within 60 days of march 1 2020 .
does not include 11250 shares of common stock subject to restricted stock units that do not vest within 60 days from march 1 2020 .
-9 includes 67499 shares of common stock .
does not include 35000 shares of common stock subjected to restricted stock units owned by mr .
greene that do not vest within 60 days from march 1 2020 .
-10 includes 585233 shares of common stock owned by mr .
heinemann and 2242582 shares of common stock owned by goose hill capital llc .
goose hill capital llc is an entity in which mr .
heinemann is the sole member .
mr .
heinemann by virtue of being the sole member of goose hill capital llc has the sole power to vote and dispose of the shares of common stock owned by goose hill capital llc .
the aforementioned beneficial ownership is based upon amendment no .
7 to schedule 13g filed by mr .
heinemann with the sec on february 11 2019 .
the address for mr .
heinemann is c / o goose hill capital llc 12378 indian road north palm beach florida 33408 .
-11 includes 2242582 shares of common stock .
steven d .
heinemann by virtue of being the sole member of goose hill capital llc has the sole power to vote and dispose of the shares of common stock owned by goose hill capital llc .
the aforementioned beneficial ownership is based upon amendment no .
7 to schedule 13g filed by mr .
heinemann with the sec on february 11 2019 .
the address for goose hill capital llc is 12378 indian road north palm beach florida 33408 .
-12 includes 1200130 shares of common stock .
the aforementioned beneficial ownership is based upon a schedule 13g filed by mr .
herzog with the sec on february 10 2016 .
the address of mr .
herzog is 824 harbor road southport connecticut 06890-1410 .

Question: How is the percentage ownership of common stock determined?
Answer: by assuming that all stock options and restricted stock units held by such person (but not those held by any other person) and which are exercisable or vested within 60 days from March 1, 2020 have been exercised and vested.