CapitolRadar tracks every publicly disclosed COST trade by US congress members and corporate insiders: 67 disclosed trades (42 buys, 25 sells) by 8 tracked traders, from 2018-09-26 to 2026-09-25. Updated daily from official filings.
🔥 In the news right now: COST picked up 54 news headlines in the last 48 hours, and 2 mentions in the investing subreddits we watch. Attention is not evidence. It tells you what people are looking at, not whether they are right.
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Costco Wholesale Corporation (COST) — Consumer Defensive · Discount Stores, market cap about $423.4B.
CapitolRadar analysis
35 disclosed COST trades split nearly evenly
The tracked COST activity contains 35 trades from January 21, 2022 through July 30, 2026: 19 buys and 16 sells by two distinct traders. That produces a modest buy majority of three transactions, but the sample is concentrated across only two people, limiting how broadly the pattern can be interpreted. The supplied data names Ro Khanna as the buyer behind all 19 buys, with the latest dated January 13, 2026. It does not identify the second trader or provide enough information to compare transaction sizes.
5 trades in 2023 Q2 marked the busiest listed quarter
Among the quarters provided, 2023 Q2 had five COST trades, including three buys. Activity then included two buys in 2023 Q3 and three trades in 2023 Q4, only one of which was a buy. The listed 2024 Q1 activity consisted of two trades, both buys. More recent quarters were sparse: 2025 Q3 and Q4 each had one trade and zero buys, while 2026 Q1 had one buy and 2026 Q3 had one trade with zero buys. Because only selected quarters are shown and several contain just one or two transactions, quarter-to-quarter comparisons rest on small samples.
6 overlapping tickers appear once each
One COST buyer also bought each of AME, BK, CMCSA, DHR, FLT and INTU. These overlaps show other disclosed purchases associated with the buyer set, but each overlap involves only one buyer and does not establish a broader trading theme or motive. Disclosure timing is also an important limitation: reported trades can appear with a lag of up to 45 days, so filing visibility may not match transaction timing. Disclosed transaction amounts are generally presented as ranges, making any dollar totals estimates rather than exact values; no amount ranges were supplied here. Taken together, the record describes transaction counts and direction, not position size, performance or intent.
Analysis written from the tracked record on 2026-08-31; it is refreshed whenever the underlying numbers change.
Activity by quarter
| Quarter | Disclosed trades | Buys | Sells |
|---|---|---|---|
| 2026 Q3 | 4 | 2 | 2 |
| 2026 Q1 | 1 | 1 | 0 |
| 2025 Q4 | 3 | 2 | 1 |
| 2025 Q3 | 1 | 0 | 1 |
| 2025 Q1 | 1 | 1 | 0 |
| 2024 Q4 | 2 | 2 | 0 |
| 2024 Q2 | 1 | 1 | 0 |
| 2024 Q1 | 6 | 6 | 0 |
Who is buying COST?
| Trader | Disclosed buys | Last buy | Grade |
|---|---|---|---|
| Ro Khanna | 21 | 2026-09-25 | — |
| Marjorie Taylor Greene | 6 | 2025-03-17 | — |
| Kevin Hern | 6 | 2024-01-12 | — |
| Markwayne Mullin | 3 | 2025-12-29 | — |
| Rich McCormick | 2 | 2025-11-05 | — |
| Pete Sessions | 2 | 2024-01-31 | — |
| Jared Moskowitz | 2 | 2023-12-28 | — |
Disclosed trades in COST
| Date | Who | Type | Amount | 30d vs SPY |
|---|---|---|---|---|
| 2026-09-25 | Ro Khanna | buy | $1,001 - $15,000 | — |
| 2026-09-11 | Ro Khanna | buy | $1,001 - $15,000 | — |
| 2026-09-04 | Ro Khanna | sell | $15,001 - $50,000 | — |
| 2026-07-30 | Rich McCormick | sell | $1,001 - $15,000 | — |
| 2026-01-13 | Ro Khanna | buy | $15,001 - $50,000 | — |
| 2025-12-29 | Markwayne Mullin | buy | $15,001 - $50,000 | — |
| 2025-11-05 | Rich McCormick | buy | $1,001 - $15,000 | — |
| 2025-10-07 | Ro Khanna | sell | $15,001 - $50,000 | — |
| 2025-09-29 | Ro Khanna | sell | $1,001 - $15,000 | — |
| 2025-03-17 | Marjorie Taylor Greene | buy | $1,001 - $15,000 | — |
| 2024-11-25 | Marjorie Taylor Greene | buy | $1,001 - $15,000 | — |
| 2024-10-04 | Marjorie Taylor Greene | buy | $1,001 - $15,000 | — |
| 2024-06-24 | Marjorie Taylor Greene | buy | $1,001 - $15,000 | — |
| 2024-03-20 | Ro Khanna | buy | $15,001 - $50,000 | — |
| 2024-01-31 | Pete Sessions | buy | $1,001 - $15,000 | — |
| 2024-01-30 | Pete Sessions | buy | $1,001 - $15,000 | — |
| 2024-01-12 | Kevin Hern | buy | $1,001 - $15,000 | — |
| 2024-01-11 | Kevin Hern | buy | $1,001 - $15,000 | — |
| 2024-01-10 | Ro Khanna | buy | $1,001 - $15,000 | — |
| 2023-12-28 | Jared Moskowitz | buy | $1,001 - $15,000 | — |
CapitolRadar signal history
NEW PICK 2026-10-11
Rep. Ro Khanna disclosed buying $1,001 to $15,000 of Costco stock. The panel passed mainly because Khanna has no verified trading record against the S&P 500, so this lone purchase is an unproven signal. A verified history of similar trades outperforming the market would have provided the strongest evidence to change the verdict; the 28-day disclosure delay remains a key caveat.
These buyers also bought
Other stocks the tracked buyers of COST disclosed buying in the last six months: ABT (2) · HCA (2) · META (2) · ICE (2) · KO (2) · MSFT (2).
About Costco Wholesale Corporation
Costco Wholesale Corporation, alongside its group entities, operates membership-based retail warehouses across a broad international scope, spanning the United States, Puerto Rico, Canada, the United Kingdom, Mexico, Japan, South Korea, Australia, Spain, France, Iceland, China, and Taiwan. These outlets provide customers with an extensive array of both well-known branded and proprietary private-label products. Their vast inventory includes household staples, shelf-stable groceries, confectionery, chilled and frozen items, alcoholic beverages, tobacco, and deli selections. Furthermore, the stor…
Frequently asked questions
Which politicians bought COST most?
Ro Khanna leads with 21 disclosed buys, followed by Marjorie Taylor Greene.
How current is this page?
It re-renders from the tracked record on every view and new filings are ingested daily — but STOCK Act disclosures can lag the trade by up to 45 days, so the most recent weeks are always incomplete.
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CapitolRadar tracks publicly disclosed trades (STOCK Act filings and SEC Form 4). Disclosures can lag the trade by up to 45 days. Backtests measure past disclosed buys against the S&P 500 and do not predict future results. Everything on this page is impersonal information for your own research — not investment advice.