COST Congressional Stock Trades & Insider Buying (2026)

COST insider buying and selling over the past year

Insiders at COSTCO WHOLESALE CORP /NEW only sold stock in the open market over the past year: 12 Form 4 sales totaling $16.77M, against no open-market purchases.

None of the 12 sales were flagged as Rule 10b5-1 plan trades, meaning each one was a discretionary decision at the time of filing. Activity clustered in 2026-01 (4 trades) and 2025-10 (2 trades); the latest filing in this window is dated 2026-10-13. The average open-market sale price was $927.21; the last close of $989.11 is 6.7% above that level, so sellers left upside on the table. The single largest trade was a sale of 2,700 shares worth $2.53M on 2025-10-24. Since the most recent filing the stock has moved +3.6%, from $954.63.

Where COST trades relative to its one-year range

COSTCO WHOLESALE CORP /NEW closed at $989.11 on 2026-10-16, inside a one-year range of $850.00 to $1,094.32. That puts the stock in the middle of its range, at 56.9% of the distance from low to high. Over one year the share price moved +6.9%, and over roughly three months +5.1%. Average daily volume over the last month was about 2,388,686 shares.

Across 12 companies in the same SEC industry group (SIC 53) with a full year of prices in Gemral Edge, the median one-year return was +29.3%. COST is behind that median and beat 17% of that peer group on this measure.

Members of Congress who traded COST

STOCK Act disclosures show 67 trades in COST by 23 members of Congress over five years (36 purchases, 31 sales), most recently on 2026-09-25. The most active traders were Ro Khanna (D-CA), 21 trades; Greg Landsman (D-OH), 5 trades; Scott Franklin (R-FL), 5 trades; Kathy E. Manning (D-NC), 4 trades; Lisa C. McClain (R-MI), 4 trades.

By party the trades split 39 by Democrats, 28 by Republicans; by chamber, 63 from the House, 4 from the Senate.

COST lobbying disclosures

COSTCO WHOLESALE CORP /NEW appears in 1 Lobbying Disclosure Act filings between 2018 and 2018, with $70.0K in reported lobbying spend.

Compare COST with indexed peers from the same industry group

These peers have full Gemral Edge dossiers and the closest one-year price move to COST:

• BJ one-year return +10.7%
• WMT one-year return +11.6%
• DG one-year return +29.3%
• TGT one-year return +71.3%

Sources and method

Every figure above is computed from public filings stored in Gemral Edge, not estimated. Insider figures count only open-market purchases and sales reported on SEC Form 4; option exercises, grants and gifts are excluded because they do not reflect a decision to buy or sell at market prices.

• SEC EDGAR Form 4 (edge_insider_trades, codes P/S open-market only) — as of 2026-10-13
• edge_prices_eod (end-of-day close) — as of 2026-10-16
• House PTR / Senate eFD disclosures (edge_congress_trades) — as of 2026-09-25
• Senate LDA filings (edge_lobbying_filings)

COST data questions

Are COST insiders buying or selling stock?

Insiders at COSTCO WHOLESALE CORP /NEW only sold stock in the open market over the past year: 12 Form 4 sales totaling $16.77M, against no open-market purchases.

What is the one-year price range for COST?

Based on end-of-day closes through 2026-10-16, COST traded between $850.00 and $1,094.32, last closing at $989.11.

Has any member of Congress traded COST stock?

Yes. 23 members disclosed 67 trades in COST over five years; the most recent disclosed trade date is 2026-09-25.