← back to rankingCOST · Costco Wholesale Corporation
Discount Stores · mkt cap $423.4B · calls: Q3 FY2026 vs Q2 FY2026
44.0 conviction · conf-adj 43
conf 5/10 🚀 reported partial
enthusiasm:24.0 · trend:8 · quantifies:5 · impact:0 · under_radar:0 · credibility:0 · business_impact:4 · disruption:0 · commitment:0 · confirmation:3
Enthusiasm latest 8 / prev 7 (rising)
Costco's AI thesis is mainly topline: personalization drives e-commerce sales, and LLM/AI search should surface Costco's full value proposition better than conventional search. Credibility improved in Q3 because management added clearer evidence on AI search growth, conversion quality, and product-page optimization, while still saying traffic volume is low and the effort is early.
GROUNDED NEXT-FY IMPACT vs CONSENSUS
Grounded on actual base — revenue $275.2B · net income $8.1B · net margin 2.9% · diluted EPS 18.21
These are next-fiscal-year annual uplift estimates, not next-quarter numbers.
Aggregate next-FY est. rev uplift: 0.41% · next-FY EPS uplift: 0.41% · vs analysts: inline · priced in: high · confidence: 5/10
| Claim | Figure | Arithmetic | Next-FY Rev % | Next-FY EPS % |
|---|
Recommendation carousel conversion 3x typical
engagement · soft | 3x better conversion rate | 3x vs typical conversion disclosed with no traffic volume or baseline; standalone it has no $ anchor. X uses it as a mechanism to estimate the incremental fraction (~2/3) of carousel sales; as a claim on its own the pcts are null. | | |
Carousel e-commerce sales ~$0.49B (Q3 FY26)
revenue | just under $0.5B/quarter | Annualize the current Q3 run-rate: $0.49B x 4 = $1.96B gross = 0.712% of $275.235B rev. X strips to the incremental piece via the disclosed 3x conversion (~2/3) -> ~$1.31B = 0.475% rev. Y instead sizes a single quarter ($490M = 0.178%). Annualizing one quarter is sounder than Y's summing of two; the 2/3 incremental haircut is an assumption, so we average the two headline figures -> ~0.41% rev. @2.94% net margin -> matching ~0.41% EPS (~$0.075 on $18.21). | 0.41 | 0.41 |
Carousel e-commerce sales >$470M (Q2 FY26)
revenue | over $470 million/quarter | Q2 $0.47B -> Q3 $0.49B confirms a building run-rate. Subsumed into the annualized Q3 figure above; NOT added separately (Y's summing of Q2+Q3 double-counts sequential quarters of the same run-rate). | | |
AI search traffic triple-digit growth
engagement · soft | triple-digit % growth | Management states volume is 'still low' off a tiny base; no $ anchor, starting traffic, or conversion volume disclosed. Cannot size without inventing a number. | | |
AI search highest conversion of all traffic
engagement · soft | highest conversion rate | Qualitative; no traffic volume, order value, or revenue base disclosed. Soft. | | |
Assumptions: Units in percent (e.g. 0.41 = 0.41%). Incremental net margin = company net margin 2.94% (carousel is core retail e-commerce; no higher software/services margin evidenced). Tax embedded in net margin; 21% default unused (no quantified cost saving). Phasing: annualize the most-current Q3 FY2026 quarterly run-rate ($0.49B x 4 = $1.96B gross) within FY2026; Q2 treated as corroboration only to avoid double-counting. Headline ~0.41% = average of X's annualized-incremental 0.475% and Y's single-quarter 0.349% aggregate, since X's annualization is sounder but its 2/3 incremental haircut is itself an assumption. No supplier-side AI revenue exists — Costco is a pure AI adopter.
Top line: AI-personalized recommendation carousels are the only hard-anchored claim: ~$0.49B/qtr (Q3) and >$0.47B/qtr (Q2), an annualized gross run-rate of ~$1.96B (0.71% of $275.2B revenue). Stripping to the genuinely incremental piece (~2/3 via the disclosed 3x conversion) and reconciling against a single-quarter read gives ~+0.41% to revenue. AI search is real but explicitly off a 'still low' base with no $ anchor, so it is not yet sizeable.
Bottom line: At Costco's 2.94% net margin the incremental carousel revenue flows to roughly +0.41% EPS (~$0.075 on $18.21). Even the gross annualized run-rate upper bound is only ~+0.71%. AI is immaterial to the bottom line at this stage — sub-1% on both lines.
Consensus FY2026 already bakes in ~+$25.94B revenue (+9.43%) and ~+12.6% EPS over FY25. The AI carousel incremental (~$1.3B, +0.41%) is only ~5% of expected revenue growth and well within closely-tracked Costco e-commerce estimates. The AI math does NOT point above consensus; it is a small, already-anticipated contributor, not a re-rating catalyst.
MODEL CONSENSUS (impact)
partial
Verdict (inline, priced_in high) fully agreed; only the immaterial sub-1% headline differed, averaged to 0.41% and confidence lowered to 5 for the method spread.
Conflicts reconciled
- est_rev/eps_uplift_pct: X=0.475 (annualize Q3, 2/3 incremental) vs Y=0.349 (sum Q2+Q3 single quarters) -> used 0.41, average, since X's annualization is sounder but Y avoids the incremental-haircut assumption
- carousel-conversion soft: X=false (mechanism) vs Y=true -> used true, more conservative as it has no standalone $ anchor
- units: X=percent vs Y=fraction -> standardized to percent
| Field | Opus 4.8 | GPT-5.5 |
|---|
| Rev uplift % | 0.475 | 0.003488075695657321 |
| EPS uplift % | 0.475 | 0.0034880756956573206 |
| Priced in | high | high |
| vs analysts | inline | inline |
| Confidence | 6 | 6 |
| Top line | AI-personalized recommendation carousels are the only hard-anchored claim: ~$0.49B/qtr (Q3) and >$0.47B/qtr (Q2), an annualized gross run-rate of ~$1.96B (0.71% of $275.2B revenue). Stripping to the genuinely incremental piece via the disclosed 3x conversion (~2/3 incremental) gives ~$1.31B, or +0.475% to revenue. AI search is real but explicitly off a 'still low' base with no $ anchor, so it's not sizeable yet. | Hard disclosed adopter-side carousel sales total $960M for Q2-Q3 FY2026, equal to $960M / $275.235B = 0.3488% of current revenue. AI search and conversion claims are positive but unanchored. |
| Bottom line | At Costco's 2.94% net margin, $1.31B incremental carousel revenue flows to ~$38.5M net income, or +0.475% EPS (~$0.087 on $18.21). Even the gross-run-rate upper bound is only ~+0.71% EPS. AI is immaterial to the bottom line at this stage — sub-1% on both lines. | At Costco's current 2.9426% net margin, $960M of modeled AI-related revenue implies $28.25M incremental net income, equal to $28.25M / $8.099B = 0.3488% EPS uplift. |
| Reasoning | Consensus FY26 already bakes in +$25.94B revenue (+9.43%) and +12.6% EPS over FY25. The AI carousel incremental (~$1.31B) is only ~5% of that expected revenue growth and +0.475% EPS — well within and almost certainly already embedded in closely-tracked Costco e-commerce estimates. The AI math does NOT point clearly above consensus; it is a small, already-anticipated contributor, not a re-rating catalyst. | Consensus FY2026 revenue growth is ($301.179B - $275.235B) / $275.235B = 9.4261%, and EPS growth is ($20.50693 - $18.21) / $18.21 = 12.6092%. The hard AI math contributes only 0.3488% revenue/EPS uplift, far below the consensus growth already modeled. |
Rows highlighted where the two models disagreed.
QUANTIFICATIONS
personalized product recommendation carousel conversion rate: 3x better than typical conversion rates (Q3 FY2026, topline)
“In Q3, our personalized product recommendation carousels delivered conversion rates 3x better than our typical conversion rates and contributed just under $0.5 billion of e-commerce sales.”
personalized product recommendation carousel e-commerce sales: just under $0.5 billion (Q3 FY2026, topline)
“In Q3, our personalized product recommendation carousels delivered conversion rates 3x better than our typical conversion rates and contributed just under $0.5 billion of e-commerce sales.”
AI search traffic growth: triple-digit growth (Q3 FY2026, topline)
“While the volume of traffic generated from AI search is still low, we saw triple-digit growth in Q3, and this activity has the highest conversion rate of all traffic coming to our site.”
AI search conversion rate: highest conversion rate of all traffic coming to our site (Q3 FY2026, topline)
“While the volume of traffic generated from AI search is still low, we saw triple-digit growth in Q3, and this activity has the highest conversion rate of all traffic coming to our site.”
personalized product recommendation carousel e-commerce sales: over $470 million (Q2 FY2026, topline)
“In Q2, our personalized product recommendation carousels drove over $470 million of e-commerce sales, and our newly modernized product display pages are driving incremental sales on our dot-com site as well as increased traffic to our same-day sites.”
PAST (realized)
- In Q3, our personalized product recommendation carousels delivered conversion rates 3x better than our typical conversion rates and contributed just under $0.5 billion of e-commerce sales.
- While the volume of traffic generated from AI search is still low, we saw triple-digit growth in Q3, and this activity has the highest conversion rate of all traffic coming to our site.
- In Q2, our personalized product recommendation carousels drove over $470 million of e-commerce sales, and our newly modernized product display pages are driving incremental sales on our dot-com site as well as increased traffic to our same-day sites.
CURRENT (now)
- Finally, as we learn more about how consumers are embracing AI in their shopping habits, we're working with the leading AI companies to improve the visibility of our values to current and potential future Costco members.
- We're now leveraging AI to enhance our product pages online, which, in turn, is increasing our relevance with the large language models.
- On our digital sites, we continue to roll out new personalization capabilities, which are resonating well with our members and are starting to have measurable impact on e-commerce sales growth.
- We're working closely with the leading AI companies to ensure our values will be visible to existing and potential future Costco members as they engage with these tools.
FORWARD (guidance)
- We believe AI is changing how consumers research products and has the potential to be a significant opportunity for Costco given our pricing authority and our focus on quality.
- And so I would say it's kind of when our members are searching for those items, we're showing up more consistently and have plans to ensure that we show up more consistently in the future.
- So we feel we're very bullish on this AI search and the strength it's going to bring to telling the whole Costco story about the true value of what we offer.
- As consumers embrace AI and their shopping habits, we believe our commitments to providing the best value on great quality items can make Costco a beneficiary of these shifts.
- And so our focus with AI in general is where can it make us better for our members, can deliver more value for our members, can help our employees be more productive so that we can pay them better and we can deliver more value for our members.
TRACK RECORD — PROMISE vs DELIVERY
—/100 (no quantified promises) no-quantified-promises 6 calls reviewed
Across these calls Costco discusses AI/ML practically — AI-driven pharmacy auto-reordering lifting in-stocks above 98%, personalized recommendation carousels driving ~$470M to ~$0.5B in e-commerce sales, prescan checkout ~20% faster, and AI-enhanced product pages with triple-digit AI-search traffic growth — but always as already-achieved results, never as forward quantified targets with both a number and a future timeframe/milestone. With no auditable prior AI promise, there is nothing to score for promise-vs-delivery.
PRICED-IN (REFINED)
HIGH (already in)Est. revisions rising · Fwd P/E 52.8 · EV/Sales 1.4x
AI claim maps to Membership, Food and Sundries, Non-Foods
Estimate revisions are rising: price targets have moved up from lastYearAvg 1063.44 to lastQuarterAvg 1117.33 to lastMonthAvg 1140.67, while forward revenue and EPS estimates show steady growth. Valuation is rich at 52.8x forward EPS, with TTM P/E near 48x and EV/Sales around 1.4x for a mature discount retailer. AI upside would most plausibly show up through membership retention/personalization and merchandising efficiency in Food and Sundries and Non-Foods. Rising estimates make the thesis more priced-in, and the premium valuation indicates the market is already paying for meaningful upside.
COVERAGE — ENTHUSIASM TRAJECTORY + CATALYSTS
1Q2 FY20253Q3 FY20255Q4 FY20259Q1 FY20267Q2 FY20266Q3 FY2026
AI enthusiasm across 6 calls — trend ↗ rising
AI evolved from absent to concrete personalization, pharmacy automation, checkout productivity, and AI-shopping visibility, though specificity peaked in Q1 FY2026.
RECENT AI CATALYSTS & NEWS
BUSINESS IMPACT - QUALITATIVE MATERIALITY
5/10 qualitative impact moderate near-term · mixed evidence
Where AI matters: e-commerce personalization and AI search visibility
Costco has a real deployed AI use case: personalized recommendation carousels are producing roughly $0.5B of quarterly e-commerce sales at 3x typical conversion, but the implied incremental company-wide revenue/EPS lift is still sub-1%. AI search visibility is strategically interesting and high-converting, but management explicitly says traffic volume remains low.
Caveats: AI search traffic is growing off a low base and may not scale into material revenue.; Recommendation-carousel sales are not fully incremental and may partly reallocate existing demand.; Greater price transparency from AI agents could intensify retail margin pressure.; Dependence on third-party LLM/search platforms could shift customer discovery economics.
AI DISRUPTION / CANNIBALIZATION RISK tailwind · 2/10
AI does not automate away Costco's core warehouse membership, procurement scale, private-label value, or store traffic model. The main risk is more AI-assisted price comparison and traffic intermediation, but that likely reinforces rather than destroys a low-price, high-trust retailer if Costco remains visible in AI shopping flows.
OPTIONS / MARKET STRUCTURE
option liquidity: good
proxy inputs — dollar-ADV $1.9B · beta 0.908 · px $954.27
source: proxy (no options chain on FMP)
FMP /stable/ exposes no options-chain endpoint on this key, so ATM IV, bid-ask spread and open interest are unavailable. Liquidity below is a PROXY from dollar-ADV, beta and price level (a stand-in for option depth), not measured option-market data.
CONFIRMATION — INSIDERS · 13F · LANGUAGE
Mixed — insiders selling, institutions adding, management language 4/10 measured.
INSIDERS selling 8 open-market sell(s) vs 0 buy(s) — net distribution
INSTITUTIONS (13F) adding as of 2026-03-31: 312 new / 213 closed positions; 2084 increased / 1611 reduced; institutional ownership +0.76pp; +109 net 13F holders
MGMT LANGUAGE 4/10 measured Concrete automation rollout language, but AI discussion is brief, consumer-facing, and framed as potential opportunity rather than proven business driver.
commit “we're seeing a significant improvement in the speed of checkout.”
commit “The pay station pilot I spoke about last quarter has also been successful”
hedge “We believe AI is changing how consumers research products and has the potential to be a significant opportunity for Costco”
VERBATIM AI QUOTES
“Finally, as we learn more about how consumers are embracing AI in their shopping habits, we're working with the leading AI companies to improve the visibility of our values to current and potential future Costco members. We believe AI is changing how consumers research products and has the potential to be a significant opportunity for Costco given our pricing authority and our focus on quality.”
— Ron Vachris, Q3 FY2026
“In Q3, our personalized product recommendation carousels delivered conversion rates 3x better than our typical conversion rates and contributed just under $0.5 billion of e-commerce sales.”
— Gary Millerchip, Q3 FY2026
“We're now leveraging AI to enhance our product pages online, which, in turn, is increasing our relevance with the large language models. While the volume of traffic generated from AI search is still low, we saw triple-digit growth in Q3, and this activity has the highest conversion rate of all traffic coming to our site.”
— Gary Millerchip, Q3 FY2026
“On the retail media question, I think for us, it's fairly simple, and the member always comes first. So it's one of the reasons why our focus with retail media, first and foremost, was to build more of the personalization capabilities to be able to deliver more relevant messaging to members that help improve the experience to save our members time and money.”
— Gary Millerchip, Q3 FY2026
“Yes, there's a cost of that AI, but it's being offset by greater sales and great leverage that we're seeing there as well.”
— Ron Vachris, Q3 FY2026
“As we mentioned earlier, it's still very early days for us. But as we've started to work on updating our product pages to ensure that they're reflecting and translating through those large language models so our value and our quality is showing up.”
— Gary Millerchip, Q3 FY2026
“So we feel we're very bullish on this AI search and the strength it's going to bring to telling the whole Costco story about the true value of what we offer.”
— Ron Vachris, Q3 FY2026
“On our digital sites, we continue to roll out new personalization capabilities, which are resonating well with our members and are starting to have measurable impact on e-commerce sales growth.”
— Ron Vachris, Q2 FY2026
“As consumers embrace AI and their shopping habits, we believe our commitments to providing the best value on great quality items can make Costco a beneficiary of these shifts. We're working closely with the leading AI companies to ensure our values will be visible to existing and potential future Costco members as they engage with these tools.”
— Ron Vachris, Q2 FY2026
“In Q2, our personalized product recommendation carousels drove over $470 million of e-commerce sales, and our newly modernized product display pages are driving incremental sales on our dot-com site as well as increased traffic to our same-day sites.”
— Gary Millerchip, Q2 FY2026
“The biggest thing we feel with our quality and our value is we want to show up everywhere we can and everywhere we can. And we want to make sure that Costco is surfacing with all these partners that we feel very confident with our values and our prices.”
— Ron Vachris, Q2 FY2026
“Our first priority is really to build the capabilities internally around delivering more personalized relevant communication to our members.”
— Gary Millerchip, Q2 FY2026
“On AI, I think, for us, it's really we look at it through the lens of -- we think we have a clear view of how we can deliver value for our members and how we support our employees.”
— Gary Millerchip, Q2 FY2026
ANALYST QUESTIONS ON AI
Q (Q3 FY2026, Oliver Chen): Also, Ron, as you continue to push for innovation and being your own best enemy against great multiyear performance, what -- are there trade-offs in terms of expenditures? Or not really? It's very capital light in terms of improving the checkout and automation as well as implementing AI to further make customers happier yet using technology and distribution and speed?
A: And again, on my question about the technology spend, I would consider it capital light from what we're seeing. We're seeing great returns on the investments. Gary spoke about the sales that we're leveraging on e-commerce. Yes, there's a cost of that AI, but it's being offset by greater sales and great leverage that we're seeing there as well.
Q (Q3 FY2026, Rupesh Parikh): Just going back to your commentary on AI search. I was just curious if you're seeing any benefits in any particular categories or services in terms of the traffic and conversion.
A: I think it's pretty broad-spread, Rupesh. It's -- as we mentioned earlier, it's still very early days for us. But as we've started to work on updating our product pages to ensure that they're reflecting and translating through those large language models so our value and our quality is showing up.
Q (Q2 FY2026, Simeon Gutman): And then the second part is if a customer speaks to an LLM, how do you show up or how do you want to show up? And are you seeing any opportunities to convert members?
A: The biggest thing we feel with our quality and our value is we want to show up everywhere we can and everywhere we can. And we want to make sure that Costco is surfacing with all these partners that we feel very confident with our values and our prices. If we're coming up on all these searches, we're going to [ fare ] very well with those.
Q (Q2 FY2026, Oliver Chen): And then as you zoom out on AI, you're having a lot of great success so far. AI is a technology that involves a lot of different partners, but you've had so much internal excellence. Like what are your thoughts on balancing that development and innovation around AI? And as you look forward, do you have an idea, will it impact pricing, supply chain, merchandising or membership engagement more or less or probably all of the above?
A: On AI, I think, for us, it's really we look at it through the lens of -- we think we have a clear view of how we can deliver value for our members and how we support our employees. And so our focus with AI in general is where can it make us better at who we are?