Congress trades in Costco Wholesale Corporation (COST)
11 of the members we track disclosed 18 purchases of COST between 2022-07-01 and 2026-07-10, and 11 sales. Here is what the stock did afterwards.
Every purchase is measured over the three months after the transaction date, against XLP — the ETF standing in for Consumer Staples — over exactly the same dates. The second figure is the one that carries information: the first mostly reflects what the sector did. How COST was classified.
How these buys are tagged
Costco Wholesale Corporation is a mega-cap, so a committee-aligned purchase here is tagged Aligned (Mega-cap) rather than Notable: owning a company this size says little about committee access. 7 are marked Cluster: A buy is marked Cluster when at least one other tracked member of Congress bought the same stock within 30 days of it, regardless of committee membership.
| Buys | Number | Return after 3 months | vs. sector | Beat their sector |
|---|---|---|---|---|
| All buys | 17 | +4.8% | +3.7% | 59% |
| Notable (committee-flagged) | 0 | Too few buys to measure | ||
| Unaligned (no committee overlap) | 13 | +7.5% | +5.1% | 69% |
| Cluster, excl. mega-caps | 0 | Too few buys to measure | ||
| Not clustered, excl. mega-caps | 0 | Too few buys to measure | ||
Who bought the most
- Markwayne Mullin — 3 buys
- Jared Moskowitz — 3 buys
- Gilbert Ray Cisneros, Jr. — 2 buys
- Richard McCormick — 2 buys
- Lisa C. McClain — 2 buys
Every disclosed purchase
| Member | Bought disclosed |
Signal | Price | 1W | 1M | 3M | vs sector |
|---|---|---|---|---|---|---|---|
| Dan Newhouse | 2026-07-10 2026-07-17 |
Aligned (Mega-cap) | $916.25 | +2.7% | +3.4% | — | — |
| Alan Armstrong | 2026-03-27 2026-07-21 |
Unaligned | $983.86 | +3.2% | +2.8% | -3.2% | -6.8% |
| Gilbert Ray Cisneros, Jr. | 2026-01-30 2026-02-13 |
Unaligned | $940.25 | +6.5% | +7.5% | +7.6% | +6.8% |
| Markwayne Mullin | 2025-12-29 2026-01-16 |
Unaligned | $867.84 | +0.9% | +10.7% | +14.8% | +10.2% |
| Richard McCormick | 2025-11-05 2025-12-09 |
Unaligned Cluster | $935.03 | -2.2% | -4.3% | +4.6% | -9.9% |
| Gilbert Ray Cisneros, Jr. | 2025-10-17 2025-11-18 |
Unaligned Cluster | $936.33 | -0.4% | -1.4% | +2.9% | -0.1% |
| John Boozman | 2025-10-09 2025-11-15 |
Aligned (Mega-cap) Cluster | $942.89 | -1.8% | -2.1% | -2.9% | -3.4% |
| Lisa C. McClain | 2025-06-17 2025-08-13 |
Aligned (Mega-cap) | $977.72 | +2.5% | -2.4% | -2.6% | -1.7% |
| Lisa C. McClain | 2024-12-11 2025-08-13 |
Aligned (Mega-cap) | $994.69 | -3.0% | -5.8% | -6.8% | -4.0% |
| Val T. Hoyle | 2024-10-29 2025-09-12 |
Unaligned | $886.99 | +0.4% | +8.4% | +8.1% | +10.1% |
| Kevin Hern | 2024-01-12 2024-02-11 |
Unaligned Cluster | $683.24 | +1.7% | +5.9% | +7.0% | +6.2% |
| Jared Moskowitz | 2023-12-28 2024-08-21 |
Unaligned Cluster | $663.10 | -2.2% | +3.6% | +10.5% | +4.3% |
| Markwayne Mullin | 2023-10-03 2023-11-01 |
Unaligned | $565.04 | -0.5% | -1.6% | +15.2% | +7.8% |
| Markwayne Mullin | 2023-09-18 2023-10-12 |
Unaligned | $562.72 | -0.7% | +2.1% | +21.1% | +21.2% |
| Jared Moskowitz | 2023-07-14 2024-08-21 |
Unaligned | $546.70 | +2.0% | +3.0% | +3.7% | +13.8% |
| Richard McCormick | 2023-03-15 2025-09-17 |
Unaligned Cluster | $485.66 | +0.4% | +1.2% | +8.6% | +6.8% |
| Jared Moskowitz | 2023-02-21 2023-03-10 |
Unaligned Cluster | $501.74 | -3.5% | -2.8% | -3.4% | -4.5% |
| Shelley Moore Capito | 2022-07-01 2022-08-10 |
Aligned (Mega-cap) | $485.76 | +3.2% | +11.4% | -2.8% | +6.1% |
Prices are the closing price on the transaction date, not what was paid: filings never disclose an execution price. Blank figures mean the window has not elapsed yet. Sales are not scored — a sale closes a position rather than opening one — so the 11 disclosed sales of COST are not in this table.
Download the data behind this page, or read how every figure is calculated. Trades in COST are a small part of the full rankings, which score each member across everything they bought.
Data last updated .