B2B Lead List Builder - Amazon, Walmart & Shopify Sellers (US)

We are looking for an experienced lead researcher to build a targeted list of US-based online sellers for an outreach campaign. What we need: We need a list of decision makers (Owner, CEO, Founder, COO) at companies that actively sell on one or more of the following platforms: Amazon FBM (Fulfilled by Merchant) Walmart Marketplace Shopify eBay Target criteria: US-based sellers only Fulfilling 500+ orders/month Headcount: 1-50 employees Titles: Owner, CEO, Founder, Co-Founder, COO, Director of Operations, Operations Manager Valid business email and/or LinkedIn URL required for each contact Deliverables: A clean CSV file with the following columns: First Name, Last Name, Job Title, Company Name, Email, Industry, LinkedIn URL, Website, Location What we do NOT want: Service businesses, restaurants, gyms, clinics, or local venues Freight or trucking companies Manufacturers or trade suppliers Duplicate companies Low authority titles (warehouse staff, coordinators, assistants) Please include examples of similar lists you have built in your proposal. Preferred delivery within 5