hideCompanies.user.js

// ==UserScript==
// @name        hideCompanies
// @description Hiding texts of annotations Companies in habra-sites; but main feature is method to load and execute of jQuery or similar external script"
// @include     /^https?://(m\.|webcache\.googleusercontent\.com\/search\?q=cache(:|%3A|%3a)(http(:|%3A|%3a)(\/|%2F|%2f)(\/|%2F|%2f))?)?(habrahabr|geektimes|megamozg).ru(?!\/special|\/api)/
// @version     1.2015.12.29
// ==/UserScript==
(function(u,f){var d=document,g=d.body,v='script',s=d.createElement(v),t=d.createElement(v);t.setAttribute('src',u);
  s.textContent=typeof f=='function'?'('+f+')();':f;s&&t.addEventListener('load',s);g.appendChild(s);g.appendChild(t)}) //loadAndExecute

("http://habracdn.net/habr/javascripts/1451404110/assets/global_main.js", function(){
    
    $('.post .post_title[href*="/company/"]').each(function(){
        $(this).parents('.post').addClass('isCorporate').find('.content').hide();
    });
});

manifest.json

{ // file for loading hideCompanies.user.js as unpacked extension for Chrome browser
   "content_scripts": [ {
      "exclude_globs": [ "http://habrahabr.ru/api/*" ],
      "include_globs": [  "http://habrahabr.ru/*", "https://habrahabr.ru/*", "http://geektimes.ru/*", "http://megamozg.ru/*", "https://geektimes.ru/*", "https://megamozg.ru/*", "http://webcache.googleusercontent.com/search?q=cache:http://habrahabr.ru/*", "http://webcache.googleusercontent.com/search?q=cache:http://geektimes.ru/*" ],
      "js": [ "hideCompanies.user.js" ], //name of userscript file in same folder as this file manifest.json
      "matches": [ "http://*/*", "https://*/*" ],
      "run_at": "document_idle"
   } ],
   "converted_from_user_script": true,
   "description": "hideCompanies",
   "name": "hideCompaniesFx", //any name for list of scripts in Chrome extensions
   "version": "1.2015.12.29",
   "manifest_version": 2
}

Comments for this script are here: http://habrahabr.ru/post/274219/#comment_8721801