Costco (COST)

Typically moves ±1.95% on earnings

EARNINGS ANALYTICS

event_note Approx. Next Earnings: ~2026-12-11 APPROXIMATE

Across 76 earnings reports since Mar 02, 2005, Costco (COST) has a clear post-earnings pattern. It moves ±1.95% on average after reporting and finishes higher 46.1% of the time. Its largest post-earnings gain was +6.58% (Dec 09, 2021) and its largest decline was -8.59% (Dec 13, 2018). The next earnings report is predicted for 2026-12-11 (approximate).

Earnings reactions

How COST moved on each past earnings report.

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Earnings Impact

Total Earnings

Avg Abs. Movement

±1.95%

Positive %

46.1%

Negative %

53.9%

Historical Earnings Statistics

Date	Timing	Earnings move	SEC Filing
Sep 24, 2026	☽ POST	+2.93%	open_in_new
May 28, 2026	☽ POST	-3.94%	open_in_new
Mar 05, 2026	☽ POST	+1.58%	open_in_new
Dec 11, 2025	☽ POST	+0%	open_in_new
Sep 25, 2025	☽ POST	-2.9%	open_in_new
May 29, 2025	☽ POST	+3.12%	open_in_new
Mar 06, 2025	☽ POST	-6.07%	open_in_new
Dec 12, 2024	☽ POST	+0.1%	open_in_new
Sep 26, 2024	☽ POST	-1.75%	open_in_new
May 30, 2024	☽ POST	-0.67%	open_in_new
Mar 07, 2024	☽ POST	-7.64%	open_in_new
Dec 14, 2023	☽ POST	+4.45%	open_in_new
Sep 26, 2023	☽ POST	+1.91%	open_in_new
May 25, 2023	☽ POST	+4.26%	open_in_new
Mar 03, 2023	☽ POST	+1.65%	open_in_new
Dec 09, 2022	☽ POST	+0.96%	open_in_new
Sep 23, 2022	☽ POST	+2.98%	open_in_new
May 26, 2022	☽ POST	+1.24%	open_in_new
Mar 04, 2022	☽ POST	+0.57%	open_in_new
Dec 09, 2021	☽ POST	+6.58%	open_in_new
Sep 23, 2021	☽ POST	+3.31%	open_in_new
May 27, 2021	☽ POST	-2.38%	open_in_new
Mar 04, 2021	☽ POST	-0.54%	open_in_new
Dec 10, 2020	☽ POST	+0.62%	open_in_new
Sep 24, 2020	☽ POST	-1.27%	open_in_new
May 28, 2020	☽ POST	-0.35%	open_in_new
Mar 05, 2020	☽ POST	-1.4%	open_in_new
Dec 12, 2019	☽ POST	-1.84%	open_in_new
May 31, 2019	☽ POST	+0.62%	open_in_new
Mar 07, 2019	☽ POST	+5.09%	open_in_new
Dec 13, 2018	☽ POST	-8.59%	open_in_new
Jun 01, 2018	☽ POST	+0.76%	open_in_new
Mar 07, 2018	☽ POST	-0.89%	open_in_new
Dec 15, 2017	☽ POST	-0.22%	open_in_new
May 26, 2017	☽ POST	+0.6%	open_in_new
Mar 03, 2017	☽ POST	-2.07%	open_in_new
Dec 08, 2016	☽ POST	+1.34%	open_in_new
Sep 29, 2016	☽ POST	+3.4%	open_in_new
May 26, 2016	☽ POST	-0.42%	open_in_new
Mar 03, 2016	☀ PRE	-0.78%	open_in_new
Dec 09, 2015	☀ PRE	-5.42%	open_in_new
Sep 30, 2015	☀ PRE	+0.59%	open_in_new
May 28, 2015	☽ POST	-1.16%	open_in_new
Mar 05, 2015	☀ PRE	+2.72%	open_in_new
Dec 10, 2014	☀ PRE	-1.95%	open_in_new
May 29, 2014	☀ PRE	-0.09%	open_in_new
Mar 14, 2014	☽ POST	+0.01%	open_in_new
Dec 11, 2013	☀ PRE	-1.22%	open_in_new
May 30, 2013	☀ PRE	-0.95%	open_in_new
Mar 12, 2013	☀ PRE	+1.28%	open_in_new
Dec 12, 2012	☀ PRE	-0.6%	open_in_new
May 24, 2012	☀ PRE	+1.4%	open_in_new
Feb 29, 2012	☀ PRE	+0.93%	open_in_new
Dec 08, 2011	☽ POST	-1.62%	open_in_new
Sep 01, 2011	☽ POST	-1.16%	open_in_new
May 25, 2011	☀ PRE	-1.27%	open_in_new
Mar 02, 2011	☀ PRE	-2.53%	open_in_new
Dec 08, 2010	☀ PRE	-0.56%	open_in_new
May 27, 2010	☀ PRE	+4.93%	open_in_new
Mar 03, 2010	☀ PRE	-1.14%	open_in_new
Dec 10, 2009	☀ PRE	+0.17%	open_in_new
May 28, 2009	☀ PRE	-1.76%	open_in_new
Mar 04, 2009	☀ PRE	+0.3%	open_in_new
Dec 11, 2008	☀ PRE	-3.04%	open_in_new
May 29, 2008	☀ PRE	-0.36%	open_in_new
Mar 05, 2008	☀ PRE	-2.5%	open_in_new
Dec 13, 2007	☀ PRE	-2.35%	open_in_new
May 31, 2007	☀ PRE	-0.11%	open_in_new
Mar 08, 2007	☽ POST	+0.15%	open_in_new
Dec 14, 2006	☀ PRE	+1.83%	open_in_new
Aug 30, 2006	☀ PRE	-4.2%	open_in_new
May 31, 2006	☀ PRE	-1.18%	open_in_new
Mar 02, 2006	☀ PRE	+1.17%	open_in_new
Dec 08, 2005	☀ PRE	-2.15%	open_in_new
May 26, 2005	☀ PRE	+0.15%	open_in_new
Mar 02, 2005	☀ PRE	-3.62%	open_in_new

event

Earnings Count

Total earnings in dataset

trending_up

Avg Abs. Movement

±1.95%

Avg % price change on earnings

description

SEC Filings

View

Browse all SEC filings

SEC Filing Types

Recent SEC Filings

10 most recent

Form	Date Filed	View on EDGAR
8-K	20261016	open_in_new SEC.gov
4	20261014	open_in_new SEC.gov
8-K	20261014	open_in_new SEC.gov
144	20261013	open_in_new SEC.gov
10-K	20261007	open_in_new SEC.gov
3/A	20260930	open_in_new SEC.gov
4	20260930	open_in_new SEC.gov
4	20260930	open_in_new SEC.gov
144	20260929	open_in_new SEC.gov
144	20260929	open_in_new SEC.gov

Frequently asked about COST earnings

When does Costco report earnings next? expand_more

Costco (COST)'s next earnings date is approximate for 2026-12-11. This is a prediction based on its historical quarterly reporting pattern, not a company-confirmed date.

How much does COST stock move after earnings? expand_more

Over 76 reports, COST has moved an average of ±1.95% the session after earnings, closing higher 46.1% of the time.

What was COST's biggest post-earnings move? expand_more

COST's largest post-earnings gain on record was +6.58% on Dec 09, 2021, and its largest decline was -8.59% on Dec 13, 2018.

Where can I find Costco's SEC filings? expand_more

All of Costco's SEC filings — 10-K, 10-Q, 8-K and more — are listed in the SEC filings section on this page, each linking to the original document on SEC.gov.