Caveat: This guide assumes you have done some minor editing in Wikipedia or are at least familiar with and understand the wiki model of open source editing. Read this guide as well as Wikipedia's "Your first article" page in full before creating the company article, and you'll know everything you need to build and publish your page. Sprucing it up after, should you choose to do so, will require additional research. However, you'll have a better understanding of how to navigate the waters to find what you're looking for.
If you’re reading this, it’s probably because the litany of article creation and editing guidelines Wikipedia has amassed can appear overwhelming to a new editor. Don't worry, it’s not actually that difficult to navigate, and there are innumerable resources (other editors, forums, the wiki helpdesk, and teahouse) to provide insight into anything you find confusing.
Before you begin, create two wiki accounts, both using non-company email addresses. If you haven't already, edit some suggested pages when prompted after you’ve created each account. Wikipedia recommends editing new or existing pages that have been flagged for improvement, and this experience will provide you with a basic understanding of how to edit pages and will bolster your accounts’ authenticity.
1. Find Mentions & Build Internal Wikipedia Links To Your Page
Will your page be an orphan? Wikipedia defines an orphan page as "an article with no links from other pages in the main article namespace." You can prevent this status from being attributed to your company page, which may be used to justify its deletion, by identifying existing brand and product mentions and linking them to the page you have yet to create.
Search Wikipedia for mentions of your company and well-known product brands. If you're a notable organization, you shouldn't have trouble finding at least one linked or unlinked mention of either the company name or one of its brands. If you find at least one mention (search all variations and brands) linking or not to your yet-to-be-created business page, great! You're one step closer to creating your page and should skip ahead to the next paragraph. If, however, there are zero existing mentions of your company, you may want to stick to simply creating a company infobox, which can appear in search engine results pages (SERPs) and add credibility to your organization when searchers query your company by name. As stated above, pages that have zero references are categorized by wiki guidelines as “orphans,” and will, without extraordinarily notable citations, be flagged for deletion.
So you've found linked/unlinked mentions of your company/brand, awesome! Simply click the edit tab within each article. Add double brackets, "[[...]]," around the exact-match [[company name as you want it to appear in the title of your article]] mention to indicate that this topic deserves its own article. For company brands or variations on the company name, you must add a pipe between the existing text and the company name as you want it to appear in your article. That is, [[company name as you want it to appear in article | existing product/brand mention]].
The last alternative, which should only be considered if there are multiple "notable" references from high authority news, scholastic, or otherwise eminent sources that have published content about the company which you can leverage, is to simply create an impeccable orphan page. This, however, is unlikely, because if the business were noteworthy enough, there would ordinarily be mentions in existing wiki articles.
2. Research & Discovery
Use the Wikipedia company infobox template and research competitors’ and other industry leaders’ wiki pages to get an idea of the information you will need to collect to build your page. Next, gather every piece of noteworthy information you can find about your company since its inception, keeping in mind Wikipedia's "notability" and "neutral point of view" requirements. Be ready to cite references to the most credible sources verifying every "neutral" point about the business you will make in your article. If you're associated in some way with the organization, you should have an abundance of resources available, and the discovery process will be pretty easy. If you've been contracted or otherwise solicited to create the article for a friend or associate of the business, I recommend developing a discovery questionnaire including information referenced in the infobox template, and submitting it to your contact within the organization.
3. Search For Your Page
Now that you're a full-fledged Wikipedia editor (having created the two non-company accounts suggested in this post's intro), search the page as you would like it to appear, keeping in mind case sensitivity. When the red link appears next to "You may create the page," click it. This will take you to the creation page which includes a link to Wikipedia:Your first article. Again, I urge you to read this thoroughly as it will be the only page in the catalog of wiki publishing content you'll need in order to create your page.
4. Create The Company Infobox
Use the aforementioned template to build the company infobox, including company logo. There is both a short and long version available, and I would strongly recommend attempting to create the long version and simply deleting inapplicable lines. The article will be subject to the scrutiny of other wiki editors following publication, so you can expect some, if not a significant portion, of both the company infobox and corresponding article to be deleted.
5. Write & Publish Your Wikipedia Article
Use your sandbox page to develop your article content following the format of similar industry pages, but tailored specifically to the company, including citations and categories. Most company articles will include but are not limited to: Foundation, History, Acquisitions, and Product/Services. That said, do not be surprised if the products/services portion is removed, as these can appear “promotional” in nature. I recommend completing the article in full, as well as soliciting peer review and potentially revising it several times before publication, to increase the likelihood that it sticks.
When it comes to formatting according to Wikipedia guidelines, you will already be familiar with the basics such as using “==…==” and “===…===” to signify headers and sub-headers, as well as “[[category:….]]” to indicate categories. All other formatting questions you have can easily be answered by referencing any page containing the formatting style you’d like to use in the edit view.
6. Following Publication
Okay, so I said five steps, but consider step six a final thought: there’s a good chance that, done wrong, your page will be taken down. Don’t get discouraged. Even if you have to create or build other pages to build links to the page you wish to create, it’s probable that, with a bit of effort, a later draft will stick. Ultimately, the criticism and auditing of fellow editors is what makes Wikipedia a (mostly) credible source, and one that can certainly lend credibility to a company’s brand (not to mention that 100 Domain Authority score from Moz).
Be prepared to defend your page against an onslaught of fellow wikinerds’ proposed edits and inquiries regarding your intentions and association with the company. Assure these trolls on your talk page, when prompted, that you're a new editor trying to get some practice and you noticed that there was a need for this page and decided to give it a try. If asked why you decided to build a company page as a new user, simply state that you read that company pages are the most difficult to publish and wanted to challenge yourself. Odds are, they'll back off following a few snide remarks in the form of tips for improving your page.
Closely monitor the page for about a week following publication and be ready to reply to more experienced editors’ updates. It is always best to do so in a deferential manner, utilizing the opportunity to solicit tips on how to improve your page. This goes without saying, but is important to keep in mind since it should disarm any editor that may decide to take issue with your page. It could also turn a disagreement that could lead page deletion into a learning experience that could improve it and ensure it remains up.
Hope this helps you build your company Wikipedia page, and happy editing!