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Screening companies by products and peers answers “who makes memory”, “who is in the lithography value chain” and “who names Micron as a competitor” — from a relations graph built out of filings (10-K competitor naming, proxy-statement peer groups, business-section product extraction), not from an industry code. Every match returns its evidence.
Plan: Fund · Credits: 1 per call; screen facets and the term search are free

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The Product and Relationship Filters

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Vocabulary search, not a screen — free. Returns product terms matching a spelling with how many companies make each. Call it before makes_term: the vocabulary expands spellings, not concepts — memory, dram, nand and memory chips are four separate terms with four separate company lists, so makes_term=memory alone misses Kioxia, Winbond and Nanya. Pass every spelling it shows you.
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Comma-separated product terms; companies that make any of them. Exact terms from find_terms.
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Companies related to any of the terms — in that product’s value chain without making it. Direction is usually unknown, so read it as “connected to”, not “supplies”.
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Companies in this company’s disclosed compensation peer group, either direction. Takes a company_id or ticker; an identifier matching nothing is an error, not an empty page.
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Companies named as a competitor by (or naming) this company in a 10-K Item 1. Same identifier rules as peer_of.

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Every Match Carries Its Evidence

Matches come back with matched_terms or matched_relation: the term, its sources, its grade, and whether a peer selection was mutual. The evidence travels with the row because extraction has failure modes — a business-section extraction can put “memory” on a PCB maker that merely wrote the word — and a product list nobody can check is a product list nobody should trust.

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Never Substitute Sector for These

“Peers” from an industry filter is a different claim wearing the same word. If the graph holds nothing for a company, the honest answer is that FocusAlpha holds nothing — never that the company makes nothing or has no peers. The free facets endpoint reports how many companies each relationship axis reaches. One caution inherited from the source material: a proxy compensation peer group is who the board benchmarks pay against, and must never be read as a causal or supply-chain link. By events · By fundamentals · Company registry · Company screening overview