How to search LinkedIn for companies by employee size inside your own network

How do you search LinkedIn companies by employee size?

Combine two searches: a Companies search filtered by company size, and a People search filtered to your first-degree connections. The first narrows the field to firms in the 51-200, 201-500 and 501-1,000 bands; the second shows which of those firms employ someone you already know at owner or executive level. Sales Navigator does both in one screen with its company headcount and seniority filters.

The size step does more work than most partners expect. Per the SBA Office of Advocacy's 2026 FAQ, 82.3% of US small businesses have no employees at all, so a network full of business owners is mostly made of companies that could never qualify. Filtering by size first saves you from screening them one at a time.

LinkedIn renames and moves its filters often, so the labels below may look slightly different in your account. The logic stays the same.

What you need before you start

• A LinkedIn profile with a few hundred first-degree connections you could actually phone. Second- and third-degree contacts matter only as a path to someone who knows the owner.
• A spreadsheet with columns for company, contact, title, size band, founded year, visible systems and notes.
• The who qualifies baseline open in another tab: a US company that had 50+ full-time employees at peak (contractors excluded), several years of documented operations, the right to license its own records, and an owner, CEO, CFO or authorized representative able to sponsor the decision.
• Optional: a Sales Navigator seat, which adds headcount and seniority filters to people search.
• About 90 minutes for the first pass. Later passes take far less.

Step by step: the three-pass shortlist

Work in three passes: size, seniority, then substance. Each pass removes companies for a different reason, which stops you from over-trusting any single LinkedIn number.

1. Export your connections. In your settings, under data privacy, request a copy of your data and choose connections. The file lists each contact's name, current company, position and the date you connected; email addresses appear only where the contact allows it. This is your universe: people who already accepted a connection with you.
2. Size pass, part one: tag each company with a band. Run a Companies search with the company size filter set to 51-200, 201-500 and 501-1,000 and the location set to United States, or look up the companies you recognize one by one. Write the band next to each company. Keep larger companies only where you know a decision-maker personally.
3. Size pass, part two: look for past peaks. A company that shrank still counts, because the test is full-time headcount at its peak. If a firm shows 11-50 today but you remember a much bigger team, keep it and mark it for confirmation. Use the past company filter in People search to find former executives of acquired or closed businesses; those companies can still qualify if the records exist.
4. Seniority pass. In People search, set connections to 1st, add the current company, and use title keywords such as owner, founder, president, CEO, CFO, COO or managing partner. Owners of services firms often call themselves principal or managing director, so search those too. In Sales Navigator, the seniority level filter (owner or partner, CXO, vice president) does the same job across every company at once.
5. Substance pass. For each remaining company, note the founded year on its company page and your contact's years in the role. Look for signs of system depth: job posts that mention a CRM, ERP, ticketing or engineering tools, a support or operations team, offices in several states. Long histories spread across many systems are what make records worth licensing.
6. Score each row. Give one point each for likely 50+ full-time at peak, five or more years of operations, a sponsor you can reach directly, and visible system depth. Rows scoring three or four go to the top.
7. Confirm size in conversation. LinkedIn cannot tell you how many full-time employees a company had at its busiest. Ask the owner before you refer anyone.
8. Ask permission, then introduce. Only after the owner agrees do you share your referral link or submit the referral form.

If you want a structured way to think about which parts of your network to mine first, the network opportunity finder walks through it.

Why LinkedIn headcount needs a second check

LinkedIn numbers are a filter, not a fact. None of them separate full-time employees from contractors, which is exactly the line SourceX draws.

Two company types need extra care. Staffing firms and outsourcers often show large counts made up of placed workers or client-site staff, and their records may belong to their clients. Holding companies can show a tiny team while operating subsidiaries carry the employees and the records.

Common mistakes and how to avoid them

Illustrative example: one evening with a 900-connection export

Illustrative only; the person and numbers are fictional. A fractional COO exports 900 first-degree connections. The size pass leaves 140 US companies in the 51-200 to 501-1,000 bands, plus nine smaller firms she knows were bigger in the past. The seniority pass cuts that to 23 companies where she personally knows an owner or C-level leader. The substance pass, using founded year and job posts, leaves seven with a long history and many systems.

She calls the seven over two weeks. Two turn out to have around 40 full-time staff plus a large contractor bench, so they drop out. One owner declines. Four agree to a screen, and she sends each a referral link so they can apply themselves.

How to open the conversation

Make the first message personal and specific. Do not mention that you found them through a search.

If they say yes, they apply at sourcex.si/apply through your referral link, which keeps your credit attached. You never export, upload or describe their records: SourceX qualifies the company, the company builds its own data inventory, and nothing is shared without a signed agreement.

Once the LinkedIn list is worked, peer networks are often the richest seam. See how CEO peer group chairs, EO and YPO members and professional referral group members approach the same conversation.

How the reward works

Partners earn 25% of the eligible platform fees SourceX actually collects from the referred company's licensing deals, capped at $100,000 per referred company. Rewards become payable only after the buyer pays and SourceX receives its fee; a lead, meeting or signed agreement alone does not trigger payment, and no reward is guaranteed. Credit goes to the first valid referrer whose introduction leads to a verified company application within the attribution window, so introduce promptly once an owner says yes.

Next step

Run the three passes on your own export this week and pick your top five rows. Then register as a partner so your referral link is ready before the first call.