First shot JS code for assigning company shares

shares.js

function CompanyShares = {
	var existingFlexShares : 70,
	var existingFixedShares : 30,
	var existingTotalShares : existingFixedShares + existingFlexShares,
	getTotalShares: function (){
		return existingTotalShares;
	},
	getFlexShares: function (){
		return existingFlexShares;
	},
	getFixedShares: function (){
		return existingFixedShares;
	},
	rewardAnnualShares: function (numSharesYear) {
		existingFlexShares += numSharesYear;
		existingFixedShares = Math.floor(existingFlexShares*3/7+1);
	}
};

var numSharesYear = 0,
var reset = function (){
	numSharesYear = 0;
};

function Person(name){
	var shares = 0;
	var shareAwardDate;
	this.name = name;
	this.awardShare = function (date){
		shareAwardDate = date;
		numSharesYear =+ Math.floor(shareAwardDate/365*10+1);
		shares =+ Math.floor(shareAwardDate/365*10+1);
	}
	this.getShares = function(){
		return shares;
	}
};

function FounderShares = {
	var sharesFounder : alyssa.getShares() + CompanyShares.getFixedShares() + 70,
	getFounderShares: function () {
		return sharesFounder;
	}
};

var alyssa = new Person("Alyssa Reese");
var jesse = new Person("Jesse Seavers");
var melanie = new Person ("Melanie Gower");

If I were you...

I would run it through a syntax checker such as jshint.com

And I would test it at jsfiddle.net