B
Evidence Grade B
Graded
under review
Safe to Cite
Current
27
27 -- retailers lacking customer identified purchase data for Largest US supermarket retailers (top 50) (2026)
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
27
Unit
Count
Data Vintage
2026
Entity
Sample Size
50
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
50
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
birdzi.com
Primary
Tier C
https://birdzi.com/retail-success-depends-on-how-you-answer-these-questions/ ↗
Source Article
Retail Success Depends on How You Answer These Questions
Original Research
birdzi.com
· Original study ↗
Methodology
Vendor blog claim; denominator is the 50 largest US supermarket retailers. Original research source and data collection date not attributed in the article; vintage set to publication year.
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Largest US supermarket retailers (top 50): 27 retailers lacking customer identified purchase data. Source: birdzi.com (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/top50-us-supermarkets-customer-data-gap
HTML Embed
<blockquote cite="https://lighthousedata.io/data/top50-us-supermarkets-customer-data-gap" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>27</strong> -- retailers lacking customer identified purchase data for Largest US supermarket retailers (top 50)<br><small>Source: birdzi.com (2026) · <a href="https://lighthousedata.io/data/top50-us-supermarkets-customer-data-gap" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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