S&P 100 Component
S&P 500 Component
|Founded||July 12, 1976 (as Price Club)|
San Diego, California, U.S.
September 15, 1983 (as Costco)
Seattle, Washington, U.S.
Number of locations
|Hamilton E. James|
W. Craig Jelinek
(President and CEO)
|Brands||Kirkland Signature Matson, Carla Corps|
Cash & Carry
|Revenue||US$152.7 billion (2019)|
|US$4.74 billion  (2019)|
|US$3.66 billion (2019)|
|Total assets||US$45.40 billion (2019)|
|Total equity||US$15.24 billion (2019)|
|Members||105.5 million (2020)|
Number of employees
Costco Wholesale Corporation (doing business as Costco Wholesale and also known simply as Costco) is an American multinational corporation which operates a chain of membership-only big-box retail stores. As of 2020[update], Costco was the fifth largest retailer in the world, and the world's largest retailer of choice and prime beef, organic foods, rotisserie chicken, and wine as of 2016[update]. In 2021, Costco was ranked #10 on the Fortune 500 rankings of the largest United States corporations by total revenue.
Costco's worldwide headquarters are in Issaquah, Washington, an eastern suburb of Seattle, although its Kirkland Signature house label bears the name of its former location in Kirkland. The company opened its first warehouse (the chain's term for its retail outlets) in Seattle in 1983. Through mergers, however, Costco's corporate history dates back to 1976, when its former competitor Price Club was founded in San Diego, California. As of March 2021[update], Costco has 804 warehouses worldwide: 558 in the United States (including the District of Columbia and Puerto Rico), 103 in Canada, 39 in Mexico, 29 in the United Kingdom, 27 in Japan, 16 in South Korea, 14 in Taiwan, 12 in Australia, 3 in Spain, 1 in Iceland, 1 in France, and 1 in China.
Costco also has plans to open its first store in New Zealand with a megastore in Westgate, Auckland. As of May 2021 the megastore is currently under construction after being postponed due to COVID-19 restrictions.
Costco's history began with Sol Price and his son, Robert, opening the first Price Club warehouse on July 12, 1976, on Morena Boulevard in San Diego, California. This gave birth to a new concept: a retail warehouse club. The Price family placed Price Club Warehouse #1 inside a series of old airplane hangars previously owned by Howard Hughes; that warehouse, now known as Costco Warehouse #401, is still in operation today.
James (Jim) Sinegal and Jeffrey H. Brotman opened the first Costco warehouse in Seattle on September 15, 1983. Sinegal had started in wholesale distribution by working for Sol Price at FedMart; Brotman, an attorney from an old Seattle retailing family, had also been involved in retail distribution from an early age. He began his retail involvement as a grocery bagger. A second store opened in Portland in October, and a third in Spokane in December 1983.
The "PriceCostco" merger
In 1993, Costco and Price Club agreed to merge operations themselves after Price declined an offer from Walmart to merge Price Club with their warehouse store chain, Sam's Club. Costco's business model and size were similar to those of Price Club, which made the merger more natural for both companies. The combined company took the name PriceCostco, and memberships became universal, meaning that a Price Club member could use their membership to shop at Costco and vice versa. PriceCostco boasted 206 locations generating $16 billion in annual sales. PriceCostco was initially led by executives from both companies, but in 1994, the Price brothers left the company to form PriceSmart, a warehouse club chain in Central America and the Caribbean unrelated to the current Costco.
Other company milestones
Costco announced the opening of 29 new locations in 2016, the most in one year since 2007. Span Construction, led by King Husein, has constructed almost all of Costco's buildings since 1989.
On August 27, 2019, Costco opened its first Chinese location, in Shanghai. The popular attention which greeted the store's opening led to its opening day being cut short over safety concerns.
In the United States, Costco's main competitors operating membership warehouses are Sam's Club and BJ's Wholesale Club. Costco employs 254,000 full and part-time employees worldwide. In 2016, Costco had 86.7 million members. This increased to 90.3 million members in 2017. and 94.3 million in 2018. In 2019, Costco had 98.5 million members. In 2020, Costco had 105.5 million members.
Costco was the first company to grow from zero to $3 billion in sales in under six years. For the fiscal year ending on August 31, 2012, the company's sales totaled $97.062 billion, with $1.709 billion net profit. As of 2019[update], Costco is ranked #14 on the Fortune 500 rankings of the largest United States corporations by total revenue. The ACSI (The American Customer Satisfaction Index) named Costco number one in the specialty retail store industry with a score of 84 in 2014.
From December 2013, Costco's board of directors was chaired by co-founder Jeffrey H. Brotman and included James Sinegal, co-founder and director, and two officers of the company: president/CEO W. Craig Jelinek and CFO Richard A. Galanti. On August 1, 2017, Jeffrey Brotman died. As of August 2017[update], James Sinegal and W. Craig Jelinek remained on the board. Jim Sinegal stepped down in 2018.
- 558 in the United States
- 103 in Canada
- 39 in Mexico
- 29 in the United Kingdom
- 27 in Japan
- 16 in South Korea
- 14 in Taiwan
- 12 in Australia
- 3 in Spain
- 1 in Iceland
- 1 in France
- 1 in China
Warehouses outside the U.S. are similar to the company's domestic locations, featuring generally identical layout, signage, and even parking lot markings. Food court menus are tailored to international tastes, with meat pies on offer in Australia; poutine in Canada; seafood-topped pizza in Asian locations; pastor taco-topped pizzas in Mexico; clam chowder in Japan, South Korea, and Taiwan; plokkfiskur in Iceland; and jacket potatoes in the UK. Additionally, Costco has led a strategic initiative to enhance the merchandise mix available at international warehouses by tailoring products to local tastes, offering a selection of both American and local products.
In 2005, the world's largest Costco by square feet was located in Hillsboro, Oregon. In 2015, Costco completed an expansion in Salt Lake City, making it the new largest Costco at 235,000 sq ft (21,800 m2). In 2019 Costco opened its biggest store in Canada, in St. John's; the store is 182,000 sq ft (16,900 m2).
In 2011, Costco's highest volume store was in Seoul, South Korea. In 2018, Taiwan's Taichung ranked at the top in the number of members and was second in the world in sales volume, behind South Korea's Yangjae store in Seoul. Of the 13 Costco operations in Taiwan, three – Taichung, Neihu, and Chungho – ranked in the top 10 in the world in sales volume.
Costco Business Centers
Costco Business Centers are warehouses similar to regular Costco warehouses, and are open to all Costco members, regardless of membership type. Their merchandise caters predominantly to enterprises, with a focus on small businesses. Business Centers do not carry most consumer items like clothing, jewelry, media, and tires, while carrying larger quantities and more options for the business products they do carry. More than 70% of the items that can be acquired from a Costco Business Center cannot be found in a typical Costco store. Some locations do have a food court, a gas station, or both. Unlike regular warehouses, most Costco Business Centers have a Print & Copy Center which provides printing professional services. They have large parking spaces for trucks and are capable of delivering goods to businesses in bulk quantities, with a delivery charge of $25 for orders that are below $250. Costco Business Center operating hours are shorter than regular warehouses (usually opening at 7:00 am on Mondays to Saturdays and closed on Sundays), while discounts and coupons for Business Centers are issued separately from regular warehouses.
As of March 2021[update], there are 20 Costco Business Centers in the United States, located in Orlando, Florida; Dallas, Texas; Minneapolis, Minnesota; Phoenix, Arizona; California (Commerce, Hawthorne, Hayward, North Hollywood, Sacramento, San Diego, South San Francisco and Westminster); Denver, Colorado; Morrow, Georgia; Bedford Park, Illinois; Hackensack, New Jersey; Las Vegas, Nevada; and Washington (Lynnwood, and Fife).
The first Costco Business Center outside the U.S. opened in Canada in Scarborough, Toronto in spring 2017. In September 2020, the second Canadian Costco Business Centre opened in St. Hubert, Québec, near Montréal.
For the fiscal year 2019, Costco reported earnings of US$3.659 billion, with an annual revenue of US$152.703 billion, an increase of 7.9% over the previous fiscal cycle. Costco's shares traded at over $205 per share, and its market capitalization was valued at over US$95.7 billion in October 2018.
in mil. USD$
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in USD$ (year end)
Costco is a membership only warehouse which generates a majority of its revenue from retail sales and a small percentage from membership fees. Customers must buy memberships to access the warehouse and make purchases. This is executed through the direct sourcing and efficient inventory management techniques.
Costco divides its business into three segments: United States Operations, Canadian Operations, and Other International Operations. These 3 business segments are reported by revenue and operating income. Of the three, the United States Operations was the largest, followed by Canadian Operations.
The company's rule is that no regular item may be marked up more than 14% over cost, and no Kirkland Signature item may be marked up more than 15% over cost. The company runs very lean, with overhead costs at about 10% of revenue and profit margins at 2%. Costco's annual membership fees (US$60/year for Gold Star, US$120/year for Executive as of 2019[update]) account for 80% of Costco's gross margin and 70% of its operating income.
If Costco feels the wholesale price of any individual product is too high, they will refuse to stock the product. For example, in November 2009, Costco announced that it would stop selling Coca-Cola products, because the soft-drink maker refused to lower its wholesale prices. Costco resumed selling Coca-Cola products the following month.
Although the brand engages in visible efforts to reduce costs, the stores themselves are expensive. In 2013, Costco spent approximately $80 million on each of the new stores it opened. The cost is partly driven by the cost of real estate, as each new store means that they need enough space to support a building of approximately 150,000 square feet (14,000 m2) in size, a large parking lot, and often a gas station.
Lighting costs are reduced on sunny days, as most Costco locations have several skylights. During the day, electronic light meters measure how much light is coming in the skylights and turn off an appropriate percentage of the interior lights. During an average sunny day, it is normal for the center section of the warehouse not to have interior lights in use. The company has no public relations department and does not buy outside advertising. A typical Costco warehouse carries only 3,700 distinct products, while a typical Walmart Supercenter carries approximately 140,000 products.
Like many other retailers vertically integrating their food supply chains, Costco has brought in-house poultry production for their rotisserie chickens, which are a major driver of customer traffic and sales. This is to allow keeping their pricing intact while maintaining a consistent quality control of its chickens as a result of annual growth of per-capita chicken consumption in the United States.
Costco primarily focuses on getting members to come in to a warehouse for purchases, instead of ordering products online. Due to the COVID-19 pandemic, Costco's online sales increased dramatically, with more online sales growth in 2020 than the previous 5 years combined.
The company opened its online shopping site at Costco.com on April 17, 2001. Costco.com is for United States members; costco.ca is for Canadian members, and other countries, such as Mexico, South Korea, Taiwan and the UK, each have their own online Costco shopping website.
Instacart offers Costco delivery in a select number of states including Arizona, California, Colorado, Florida, Georgia, Illinois, Indiana, Massachusetts, Maryland, Minnesota, Missouri, North Carolina, New Jersey, New York, Oregon, Tennessee, Texas, Virginia, Washington, and the District of Columbia. No membership is needed to order from Costco on Instacart, but Instacart charges delivery fees and the prices may not necessarily be the same as in a Costco warehouse.
Similarly, in March 2017, Costco initiated a partnership with Shipt, an online grocery delivery service. Unlike Instacart, Shipt charges its own membership fee, $99 a year or $14 a month, in exchange for free delivery on orders over $35. As of November 2018[update], Shipt offers Costco delivery in select Florida markets.
In October 2017, Costco launched same-day and two-day grocery delivery options for members.
Costco has a frequently changing inventory and is known for carrying products for a time, then discontinuing them or using them as seasonal products. Over the years, Costco has gradually expanded its range of products and services. Initially, it preferred to sell only boxed products that could be dispensed by simply tearing the stretch wrap off a pallet. It now[when?] sells many other products that are more difficult to handle, such as art, books, caskets, clothing, computer software, fine wine, furniture, home appliances, home electronics, hot tubs, jewelry, perishable items (such as dairy, fresh baked goods, flowers, fresh produce, meat, seafood), solar panels, tires, and vacuum cleaners. Many warehouses also have gas stations, pharmacies, hearing aid centers, optometrists, eye and sunglass centers, photo processors, and tire garages. The produce items that require refrigeration are kept in a walk-in refrigerator, and several locations even have a walk-in refrigerator for dairy items.
Some locations have liquor stores, often kept separate from the main warehouse in order to comply with liquor license restrictions. In some states (such as Texas), the liquor store must be owned and operated by a separate company with separate employees. In 2006, Costco lost a lawsuit against the state of Washington in which it was seeking to purchase wine directly from the producer, bypassing the state retail monopoly. In Australia, Costco has to comply with regulations set by each state they choose to trade in; their first store in the Australian state of Victoria benefits from some of the most liberal alcohol licensing laws in that country, with retailers permitted to sell alcohol on shelves within the store, in a manner similar to most European countries. In the Canadian province of Quebec, beer and wine are sold within the stores from pallets.
"Kirkland Signature" is Costco's private label. It is sold by Costco at their website and warehouses, and is trademarked by the company. Costco introduced Kirkland Signature as its private label in 1992, deriving the name from the location of Costco's then corporate headquarters, Kirkland, Washington (their headquarters later moved, roughly 12 miles (19 km), to Issaquah, Washington). It accounts for almost a third of all Costco sales and is growing faster than Costco sales. Many Kirkland Signature products are produced by the same manufacturers as their respective name brands. For example, Kirkland branded bottled water is produced by private label bottler Niagara Bottling, and some of Kirkland's branded coffee is roasted by Starbucks.
The idea for the private label was to provide the appearance of brand name quality products at discounted prices. To counteract the consumer confidence problem common in store-name branding, Kirkland Signature occasionally employs co-branding. According to Costco, while consumers may be wary of same-store branding, they are less likely to be wary of brands that they are familiar with and trust.
Costco Connection is a magazine sent free to the Costco executive members; it can also be accessed online by anyone, free of charge. Until end of 2018, the magazine was known as The Costco Connection. But with the January/February 2019 issue, "the", the definite article was dropped from the name and now the magazine is known as just Costco Connection.
The magazine was established in 1987 as a newsprint publication and converted to a magazine in 1997. It features articles which regularly tie into the corporation along with business, celebrity features, cooking, entertaining, health, home improvement, and social articles, as well as coupons and ads. MediaPost reports: "While about 90% of the magazine's advertising is co-op, increasingly national advertisers such as Procter & Gamble are buying space, notes Roeglin -- presumably because of the pub's gargantuan reach and the data it has on its subscribers (whose average household income is $156,000 a year). 'We see about 56% of our subscribers a month buy something at one of our stores based on something they've read in the magazine,' says Roeglin." The magazine is one of the largest-circulation print monthly in the United States and presently is the third in circulation figures in the United States after AARP The Magazine and AARP Bulletin.
Costco also publishes the Costco Household Almanac, an annual edition started in 2007. The 200+ pages almanac carries a lot of helpful tips to Costco readers and carries ads from suppliers. Costco also publishes a cookbook series.
Costco offers a free "concierge" service to members who purchase electronics, to help answer questions regarding setup and use and avoid potential returns due to not understanding how to use the products.
Costco Auto Program
As of September 2015[update], Costco was the second largest auto seller in the US, just behind AutoNation. Costco regularly teams up with various automobile manufacturers to offer special deals to customers, e.g., Polaris (a leading seller of powersport vehicles) in 4Q2015 and General Motors from October 2015 through January 2016. Addicted to Costco lists the following as some benefits of the Costco Auto Program:
- A low, prearranged price for Costco members
- All available national manufacturer incentives
- More than 3,000 dealerships nationwide, with specially trained employees to assist Costco members
Costco Auto and Home Insurance
Costco business services
Costco photo services
Costco Photo Center is a multi-functional photography printing service offering photo items through its website, costcophotocenter.com. The website provides free unlimited digital file storage with a current membership. Prior to February 14th, 2021, in store photo centers offered many services such as same day photo printing (on select sizes/material) and online order pickup. In store service/pickup is no longer offered, as all in store photo centers closed permanently on February 14th, 2021.
In December 2005, Costco signed an agreement with PhotoChannel Networks Inc., whereby Costco could deploy the PNI Digital Media Platform to offer online photo printing for Costco members through the website.
Previous to May or June 2010, Costco had an agreement with Mypublisher.com for custom book and calendar publishing. Photo-books and calendars are now processed through multiple external vendors. Canvases are processed and printed by Your Photo on Canvas (ypoc.com), a Costco exclusive vendor.
On July 17, 2015, Costco disabled their online photo site. In common with other retailers, there is currently[when?] no confirmation about whether hackers had stolen Costco customers' photographs or data. As of August 1, 2015[update], Costco was estimating the website might return in mid-August, after a four-week outage.
On January 13, 2021, Costco announced that it will be closing the Photo Centers in all its locations by February 14, 2021. 
On February 14th, 2021, all Photo Centers closed for in-store printing and store-pickup service. A majority of services are still available online as ship to home/business products. Notable in store services that are no longer offered include Passport photos, ink refills, and an externally contracted photo restoration service.
Costco Optical ranks as the fifth-largest optical company in the US, as of 2015[update]. Optometrists working at Costco locations will see patients without Costco memberships, although a membership is required to fill a prescription at the optical department.
Costco Travel is a wholly owned subsidiary of Costco Wholesale and offers leisure travel to Costco members of the United States and Canada. The program was established in 2000 as a service to Costco members. Costco Travel's offices are located in Issaquah, Washington, adjacent to Costco's corporate headquarters. Costco Travel employs over 700 travel professionals, all of them Costco employees.
The program offers vacation packages to the Caribbean, Europe, Florida, Hawaii, Las Vegas, Mexico, and the South Pacific. Other products include car rentals, cruises, guided vacations, and theme park packages. Select products feature additional benefits for Costco Executive Members.
The program is marketed directly to Costco members through various Costco avenues, including the Travel Guide to Savings (found in all U.S. Costco warehouses) and in the Travel section of Costco.com.
Jim Sinegal on the stagnant price of Costco's hot dog and soda combo, 
Most, if not all, Costco locations have a food court. They can be indoors or outdoors, but the menu is essentially the same: hot dog with drink (one of the most popular items), pizza, frozen yogurt/ice cream, Pepsico beverages, baked items, and sandwiches. Sometimes, items are added to the menu seasonally. Costco offers a quarter-pound 100% beef hot dog and 20 US fluid ounces (590 ml) drink (with refills) for US$1.50, the same price since 1985. Some US locations also offer Polish sausage or bratwurst in addition to hot dogs, at the same $1.50 price. In Australia, the hot dog is made of pork and is sold with a large soda for AUD$1.99. In Canada, the price for a hot dog and soda with refills is C$1.50. In Mexico, the hot dog is made of 100% beef and includes a drink (with refills) for MXN$35. In the UK, the hot dog is also made from beef and customers also get a drink (with refills) for £1.50. Costco sold more than 137 million quarter-pound (113 g) hot dogs in its food courts in 2017. In Taiwan and Japan, the hot dog is made of pork as well.
As of January 2021, cheese or pepperoni pizza, chicken bakes, ice cream (vanilla), ice cream sundae (vanilla, with very berry or chocolate sauce toppings), fruit smoothies, latte freeze (without chocolate), mocha freeze (with chocolate), and twisted churros (in select stores) are offered at all United States location. Some food court items are only available in certain countries. For example, the bulgogi bake and mango boba tea are only available in Australia, Taiwan, Korea, and Japan; poutine is only available in Canada. There are, however, temporary menu items available exclusively in several countries, like the pastor taco-topped pizzas in Mexico. The nutrition data for the Costco Food Court items is posted online and in store.
Past menu items include veggie and combo pizza, frozen yogurt (chocolate, vanilla, or swirl), beef bake, turkey provolone sandwiches, chicken Caesar salads, beef brisket sandwiches, organic beef-based cheeseburgers, beef chili with beans, and in some locations, gelato.
|Original Item||Replacement Item|
|Veggie/Combo Pizza||No Longer Offered|
|Frozen Yogurt||Vanilla Ice Cream (with addition of chocolate sauce sundae)|
|Turkey Provolone||No Longer Offered|
|Twisted Churro||Replaced with dual-flavor churro in late 2020/early 2021, name remained same|
|Chicken Ceasar Salad||No Longer Offered|
|Chicken Bake||Replaced with factory-made item of same name, no longer hand-made in store (at most locations)|
|Diced Onion (topping)||No Longer Offered|
|Deli Mustard (condiment)||No Longer Offered|
|Relish (condiment)||Offered in select locations, expected to resume at all locations (no time period for return)|
Due to slow sales, in 2009, the pretzel was replaced by the churro. In April 2013, Pepsi replaced all Coca-Cola fountain drinks at U.S. locations because Coke had raised its prices; this helped keep the hot dog combo with soda at its original US$1.50 price.
In select Costco food courts, Costco was selling cheeseburgers for a limited time to experiment sales. The cheeseburger was not successful, and never spread to more than a few locations.[needs update]
In early 2020 (due to the Coronavirus outbreak), many locations suspended all food court operations within the warehouse, opening them up weeks later to a limited take-out only menu and replacing fountain sodas with canned beverages. Many locations have had their seating area removed. As of January 2021, all United States locations are open for partial service (with a changed menu). Seating is available in select locations.
Costco credit card
On April 1, 2016, in US, Citigroup became the exclusive issuer of Costco's branded credit cards. Prior to that, Costco credit cards had been issued by American Express since 2001, and Costco accepted only American Express cards for credit transactions. After the switch of its co-branded cards to Citi, Costco ceased accepting AmEx and began accepting Visa. AmEx cited the reason for the split that Costco was asking for lower transaction fees than AmEx was willing to grant. In Canada, Costco ended its AmEx relationship in 2014, and starting in 2015, it partnered with Capital One Mastercard for branded credit cards. In 2020, Capital One announced it would be ending the partnership in late 2021. Costco branded credit cards from both issuers also serve as alternate Costco membership cards, with a customized reverse side containing membership info.
Costco Audiobook App
In March 2021, Costco started selling audiobooks and launched a corresponding iOS and Android app to listen to purchases. The app is free, however the books are exclusive to Costco members. The retailer sells audiobooks in bundles grouped by genre or author, with prices ranging from $5 to $50. Audiobooks are currently only available at U.S. locations.
This section needs to be updated.June 2020)(
While some former Price Club locations in California and the northeastern United States are staffed by Teamsters, the majority of Costco locations are not unionized, although there seemed to be a move in 2012 to unionize some locations in Canada. The Teamsters claim that over 15,000 Costco employees are union members. The non-union locations have revisions to their Costco Employee Agreement every three years concurrent with union contract ratifications in locations with collective bargaining agreements. The Employee Agreement sets forth such things as benefits, wages, disciplinary procedures, paid holidays, bonuses, and seniority. The Employee Agreement is subject to change by Costco at any time and offers no absolute protection to the workers. As of March 2011[update], non-supervisory hourly wages ranged from $11.00 to $21.00 in the U.S., $11.00 to $22.15 in Canada, and £8.50 to £11.50 in the United Kingdom. In the U.S. as of 2005[update], eighty-five percent of Costco's workers had health insurance, compared with less than fifty percent at Walmart and Target. Health benefits include coverage through Aetna, remote primary care through Teladoc, second opinions and clinical navigation by Grand Rounds, and wellness coaching by Omada.
In February 2021, Costco announced that it will be raising the starting rate for its hourly store workers in the United States to $16 an hour. Costco has been actively raising their minimum wage starting with $14 during 2018, and into $15 during 2019. They further add that 20% of their hourly employees will be subject to the minimum wage change.
Product-demonstration (e.g., food samples) employees work for an independent company. In the western U.S., the company is called Warehouse Demo Services, Kirkland, Washington. Costco also uses Club Demonstration Services (CDS), based in San Diego, California. Demonstration employees receive a pay and benefit package that is less than that of Costco employees. As of August 1, 2017[update], demonstrations/samples are provided by CDS in Canada.
Following the COVID-19 outbreak, the first Costco store in Perth, Australia, unexpectedly opened on March 19, 2020, without an opening ceremony and earlier than its planned time of 8:00AM due to high demand, especially for toilet paper products, to ease panic buying in mainstream supermarkets in Australia, although toilet paper was limited to only one per transaction. Carts and other objects were cleaned regularly to minimize the risk of contracting the virus.
On December 23, 2020, a Costco store in Cuernavaca, Morelos, Mexico, was forced to temporarily close after the store ignored restrictions on store capacity. The following day the entire state was put on Red alert following a sharp increase in COVID-19 infections in the state; Cuernavaca was the municipality most severely effected.
The first Costco Home warehouse opened in 1983, and was rebuilt / expanded in 2002, in Seattle. The warehouse's concept was to combine the value, setting and members-only elements of Costco's warehouse clubs with the product array one would find at an upscale home store, such as Fortunoff or Crate & Barrel. The Costco Home warehouses sold furniture, housewares, kitchen products and accessories from higher-end brands such as Lexington, Ralph Lauren and Waterford in a warehouse-club setting. Costco claimed that, similar to its main warehouses, it accepted lower margins in return for greater volume with minimal overhead.
Over time, the concept was adjusted to include home electronics, some major appliances, office furniture, and a large selection of outdoor furniture and window treatments. Costco also partners with Glentel subsidiary WIRELESS etc. to sell mobile phones and plans in Canada and Wireless Advocates in the US.
On April 2, 2009, the company announced that it would be abandoning its Costco Home concept, closing the two existing stores in Kirkland, Washington and Tempe, Arizona on July 3, 2009, and abandoning plans for a third store on the West Coast. The company cited cutbacks in consumer spending on home products and its interest in focusing on its core business as the main reasons.
In 2010, Mercy for Animals conducted an undercover investigation at Buckeye Veal Farm, a veal supplier to Costco. Immediately following the investigative release, Costco adopted a policy against purchasing veal from producers that use the crate-and-chain production method. The case prompted Ohio lawmakers to vote in favor of a veal crate phase-out in the state.
In 2012, Mercy for Animals conducted another undercover investigation of a pork supplier to major retailers such as Costco, Walmart, Safeway, Kroger, and Kmart. Before the public release of the investigation, Costco announced they would begin requiring their pork suppliers to phase out gestation crates.
In 2014, The Guardian reported that Costco is a client of Charoen Pokphand Foods. Over six months, The Guardian traced down a supply chain from slave ships in Asian waters to leading producers and retailers. Costco has published a statement saying it has had a supplier code of conduct since 1999 which does not allow this practice, and that independent auditors check for violations regularly.
In 2015, The Humane Society of the United States conducted an undercover investigation at an egg supplier to Costco. An undercover worker at Hillandale Farms, a major egg supplier to Costco, filmed conditions in which egg-laying hens lived in tiny, wire cages. Following the investigations, several celebrities including Brad Pitt and Ryan Gosling publicly wrote to Costco to address this issue. Following efforts by animal protection nonprofits including The Humane League, Costco released an updated commitment to source exclusively cage-free eggs in its operations.
In 2016, a follow up to Costco's shift to cage-free eggs by animal rights group Direct Action Everywhere (DxE) reported cannibalism and high mortality at a cage-free Costco egg supplier. Costco denied the allegations, but the video sparked a discussion about animal welfare problems continuing to exist at cage-free egg farms. Writing in The Huffington Post, DxE co-founder Wayne Hsiung argued that the new investigation, rather than suggesting that Costco should keep birds in cages, indicated that hens should have the right not to be raised for food or kept on farms at all.
In August 2017, a federal judge ordered a "deceptive" Costco to pay Tiffany & Co. $19.4 million for misleading consumers into thinking they could buy legitimate Tiffany merchandise at warehouse club prices.
Costco was criticised in 2019 by the Natural Resources Defense Council and Sumofus for using virgin Canadian boreal forest to make its toilet paper. NRDC says that over the last twenty years, 28 million acres of Canadian boreal forest have been cut down to make toilet paper.
In September 2020, CBS News reported that Costco has stopped selling Palmetto Cheese after the owner of the pimento cheese brand called Black Lives Matter a "terror organization." Costco posted a note to the item in their Myrtle Beach location indicating that the item will not be reordered, and over 120 Costco's throughout the US will no longer be carrying the item. 
In October 2020, Costco dropped Chaokoh coconut milk over the allegations of forced monkey labor. PETA accused the manufacturer, Theppadungporn Coconut Co., of using forced monkey labor, finding cruelty to monkeys at their farms and facilities. Ken Kimble, Costco's Vice President of Corporate Food and Sundries, stated Costco has launched an investigation regarding the issue and have ceased purchasing from the supplier/owner of the brand Chaokoh condemning the use of Monkey labor. Kimble also stated that Costco will continue to monitor the implementation of the harvest policies and once satisfied will resume purchasing. 
In December 2020, Costco has announced that they will ban the caged egg globally. It became the first US retailer to issue a global policy on the confinement of animals in its supply chain. Josh Dahmen, Costco financial planning and investor relations director also said that "We are in the process of making that transition to cage-free eggs. We will continue to increase the percentage over time, with a goal of eventually getting to 100%."
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