B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
80%
80% -- ad spend for Amazon and Walmart (2026)
In the U.S., Amazon and Walmart together account for roughly 80% of all retail media ad spending.
- roughly 80 percent
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
80%
Unit
Percentage
Data Vintage
2026
Entity
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
75
Source Trust
60
Citation Chain
20
Independence
30
Methodology
35
Freshness
95
Source
Tinuiti
Primary
Tier B
https://tinuiti.com/blog/paid-social/expert-interview-series-craig-patterson-retail-insider-canadian… ↗
Source Article
What Are the Top Retail Media Networks In 2026? | Tinuiti
The Skinny:
- Retail media networks (RMNs) are retailer-owned advertising platforms that use first-party shopper data to deliver highly targeted ads at or near the point of purchase.
- Amazon and Walmart currently lead the space, but the landscape has expanded into a broader “commerce media” ecosyst…
Original Research
Tinuiti
· Original study ↗
Methodology
Estimated share of US retail media ad spending.
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Amazon and Walmart: 80% ad spend. Source: Tinuiti (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/us_retail_media_ad_spend_amazon_walmart
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<blockquote cite="https://lighthousedata.io/data/us_retail_media_ad_spend_amazon_walmart" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>80%</strong> -- ad spend for Amazon and Walmart<br><small>Source: Tinuiti (2026) · <a href="https://lighthousedata.io/data/us_retail_media_ad_spend_amazon_walmart" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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