portolio
Start reading →
§ COMPANY · COST

COST SEC filings — Smart Summaries & insider activity (2026)

Plain-English AI summaries of every COSTCO WHOLESALE CORP /NEW 10-K, 10-Q, 8-K, and Form 4. Updated as each filing hits EDGAR.

Latest filing
May 15, 2026
Last price
$1028.24 -2.11%
Track COST

§ FILINGS BY FORM

Last 365 days

Never miss a COST filing

Get real-time email alerts when COST files with the SEC.

See plans
§ FILINGS

What did COST file recently?

The 25 most recent SEC filings for COSTCO WHOLESALE CORP /NEW. Click any row with a Smart Summary to read the plain-English version. New here? Learn how to read a 10-Q or what Form 4 codes mean.

3/A$COST
SCHEDULE 13G$COST
SCHEDULE 13G Filing
8-K$COST
8-K Filing
144$COST
144 Filing
4$COST
SCHEDULE 13G/A$COST
SCHEDULE 13G/A Filing
4$COST
4$COST
4$COST
3$COST
10-Q$COST
10-Q Filing
144$COST
144 Filing
8-K$COST
8-K Filing
Q1 2026 earnings results
4$COST
4$COST
4$COST
144$COST
144 Filing
8-K$COST
8-K Filing
4$COST
4$COST
3$COST
144$COST
144 Filing
4$COST
144$COST
144 Filing
4$COST
§ FAQ

Frequently asked about COST

When did $COST last file a 10-K?
$COST most recently filed a 10-K on October 8, 2025.
When did $COST last file a 10-Q?
$COST most recently filed a 10-Q on March 11, 2026.
Have $COST insiders bought shares in the last 30 days?
No — zero insider purchases (Form 4, code P) have been reported for $COST in the last 30 days.
How many 8-Ks has $COST filed in the last year?
$COST has filed 11 8-Ks in the last year.
How many filings has $COST made in the last year?
$COST has made 96 SEC filings in the last year.

Track COST — get an email the moment they file.

See plans
COST — COSTCO WHOLESALE CORP /NEW SEC Filings & Smart Summaries (2026) | Portolio