USG Corporation

Last updated
USG Corporation
Company type Private
Industry Building materials
Founded1901;123 years ago (1901)
Headquarters,
Key people
Christopher R. Griffin (President & CEO)
Products Gypsum, drywall, joint compound, dropped ceiling
RevenueIncrease2.svg US$3.03 billion (2016)
Increase2.svg US$374 million (2016)
Increase2.svg US$510 million (2016)
Total assets Increase2.svg US$3.87 billion (2016)
Total equity Increase2.svg US$1.89 billion (2016)
Number of employees
6,800 [1]  (2017)
Parent Knauf
Website www.usg.com

USG Corporation, also known as United States Gypsum Corporation, is an American company which manufactures construction materials, most notably drywall and joint compound. The company is the largest distributor of wallboard in the United States and the largest manufacturer of gypsum products in North America. It is also a major consumer of synthetic gypsum, a byproduct of flue-gas desulfurization. Its corporate offices are located at 550 West Adams Street in Chicago, Illinois.

Contents

Together with other construction products, USG's most significant brands are: [2]

  • Sheetrock Brand Gypsum Panels [3]
  • Securock Brand Glass-Mat Sheathing [4]
  • Sheetrock Brand All Purpose Joint Compound [5]

In December 2013, Warren Buffett's Berkshire Hathaway became the largest shareholder in the company (holding roughly 30%) when it converted USG convertible notes it had acquired in 2008 to common stock. [6]

In June 2018, USG entered into an agreement to be purchased by the privately-held building materials company Knauf. It operates as an independent subsidiary of Knauf and continues to remain headquartered in Chicago, Illinois. [7] The deal closed in April 2019. [8]

In 2020, it was referenced in the movie Nomadland . [9]

History

In the 1890s, gypsum manufacturers perfected a method of strengthening plaster by adding a retarder, which controlled the setting time, thus creating a viable competitor to traditional lime plaster. Because gypsum was plentiful, and available at a relatively low price, and because the manufacturing process was so simple, new firms flooded and fragmented the market, placing constant downward pressure on prices.

On December 27, 1901, 30 gypsum and plaster companies merged to form the United States Gypsum Company, resulting in the creation of the first nationwide gypsum company in the United States. The new company combined the operations of 37 mining and calcining plants producing agricultural and construction plaster.

In 1909, USG purchased the Sackett Plaster Board Company, inventor of Sackett Board, which was a panel made of multiple layers of plaster and paper. By 1917, a new manufacturing process produced boards with a single layer of plaster and paper that could be joined flush along a wall with a relatively smooth surface. Originally called Adamant Panel Board, the product became known as Sheetrock in 1917.

By the 1930s, the company's policy of diffusion of manufacturing facilities, vertical integration and product diversification allowed it to operate profitably every year during the Great Depression. The 1933 Chicago World’s Fair featured buildings made almost entirely out of Sheetrock panels, which led to the brand's first major advertising campaign.

The 1950s and 1960s saw expansion into Mexico and other international markets.

Recession and its effect on the bottom line dominated the 1980s and led to a restructuring of the company. On January 1, 1985, USG Corporation was formed as a holding company a reverse merger in which United States Gypsum Company became one of just nine operating subsidiaries.

In the mid- to late-1990s, the company invested in a significant expansion of its manufacturing network, adding new high-speed wallboard manufacturing operations in Rainier, OR, Bridgeport, AL, and Aliquippa, PA. Other existing operations were substantially rebuilt or modernized, including the wallboard manufacturing plant in East Chicago, Indiana.

In 1999, USG acquired Sybex, Inc. the holding company for Beadex (a competing joint compound manufacturer) and Synkoloid. [10] Other USG subsidiaries at the time included Alabaster Assurance Company, CGC, Donn Products, Exploracion de Yeso, Grupo Yeso, Gypsum Engineering, H & B Gypsum, L&W Supply, La Mirada Products Co., Inc, Red Top Technology, and Yeso Panamericano.

In 2001, the company entered Chapter 11 bankruptcy proceedings to resolve legacy asbestos lawsuits. Asbestos was a minor ingredient in some specialty products that the company had stopped selling almost 40 years earlier, in the 1970s. The company's operations remained healthy and profitable while it was in Chapter 11. When the bankruptcy was completed in 2006, all creditors were repaid in full and USG shareholders retained equity in the company. In a Wall Street Journal article dated February 15, 2006, Warren Buffett said, "It's the most successful managerial performance in bankruptcy that I've ever seen." A $3.95 billion trust was created to handle all existing and potential future asbestos lawsuits, thus permanently resolving the asbestos litigation issue.

USG managed through the Great Recession, which hit the residential and commercial construction markets in mid-2006, by cutting costs and closing older, less efficient operations. William C. Foote, the company's CEO for almost 20 years, retired in 2010, and 30-year USG veteran James S. Metcalf was elected Chairman, President and CEO. Metcalf implemented the company's "Plan to Win" which involved strengthening its core manufacturing operations and L&W Supply distribution business, diversifying sources of revenues and profitability, and differentiating the company from competitors through innovative products and services. The company returned to profitability in the first quarter of 2013, posting net earnings of $2 million, followed by $26 million in net income in the second quarter of 2013.

Corporate structure

USG Corporation has the following significant subsidiaries: [11]

  • USG Interiors, LLC
  • Otsego Paper, Inc
  • CGC Inc.
  • USG Latin America, LLC
  • USG Holding de Mexico S.A. de C.V.
  • USG Mexico S.A. de C.V.

Corporate headquarters building

In 1992, USG moved its corporate headquarters from 101 South Wacker Drive to 125 S. Franklin Street in Chicago, a site which it occupied until March 2007. Known as the USG building, the structure is part of the dual-tower AT&T Corporate Center, which was completed in 1989. The building was designed by Adrian D. Smith, FAIA, RIBA Design Partner at Skidmore, Owings & Merrill and constructed by Morse Diesel within its $110 million construction budget. The USG building is 538 ft (164 m) tall and houses 35 floors and 1,100,000 square feet (100,000 m2) of space, including 12,000 square feet (1,100 m2) of retail, a 650-seat restaurant expansion, and two levels of below-grade parking for 160 cars. USG had its own entrance with a lobby and occupied the first nine floors exclusively and parts of the 11th floor. Italian marble is used as cladding and also in the highly ornate interior. The interior also features gold leaf and satin-finish brown and American oak wood trim. Parts of the building lobbies were used in the filming of the 1994 film, Ri¢hie Ri¢h.

In 2005, USG announced it would not be renewing its lease at the 125 S. Franklin Street building and instead would move to a new building at 550 W. Adams developed by Fifield Companies. The base building architect is De Stefano + Partners, with The Environments Group providing the interior space design and construction. USG entered a 15-year lease, and occupied the building in early 2007. The new building is occupied 65% by USG and 10% by Humana Inc. As an incentive for USG to remain in the downtown Chicago area, the city of Chicago created a redevelopment agreement that contributed $6.5 million to the construction of the new building. [12] In turn, USG agreed to maintain at least 500 full-time equivalent jobs at all times for a period of ten years at the new corporate headquarters.

Manufacturing and mining facilities

Gypsum wallboard manufacturing facilities are reported to the SEC based on the extent to which the gypsum they use comes from synthetic or natural sources.

CountryGypsum WallboardJoint CompoundCement BoardMines and QuarriesPaper for Gypsum WallboardCeiling Suspension SystemsCeiling Panels
Full syntheticPart syntheticNatural gypsum
United States
Canada
Mexico

Plaster City, California facility

USG has a large gypsum plant located 17 miles (27 km) west of El Centro, California, along highway Interstate 8, at Plaster City. [14] The Plaster City location makes Sheetrock brand gypsum panels. The gypsum is mined from a quarry located 20 miles (32 km) to the north, in the Fish Creek Mountains of Imperial County. The quarry is estimated to contain a deposit of 25 million tons of gypsum. [15] [16]

USG operates an active narrow gauge railway, the last industrial narrow gauge railway in the United States. [17] [18] The 3 ft (914 mm) gauge line runs north for 26 miles (42 km) from the plant at Plaster City (formerly known as Maria) to the gypsum quarry. The line hauls gypsum rock from the quarry to the plant.

[19] The line was originally built by the Imperial Gypsum Company Railroad and was owned by the Imperial Valley Gypsum and Oil Corporation. The railroad built from the San Diego & Arizona Railway at Plaster City to the quarry. Surveying commenced in April 1921, grading on October 3, 1921 and construction was completed on September 15, 1922. Commercial operation commenced on October 14, 1922. The total length of the line was 19.63 miles (31.59 km). Two years after completion of the line (1924), the track was sold to the Pacific Portland Cement Company.

USG purchased the line from the Pacific Portland Cement Company in 1946. In 1947, the first diesel engine was operated on the line.

The USG plant at Plaster City is currently served by the Union Pacific Railroad (UP).

Significant events

Antitrust cases

Criminal

In 1973, six wallboard manufacturers (including USG) were charged with violating §1 of the Sherman Act during the period 19601973, through engaging in a combination and conspiracy in restraint of interstate trade and commerce in the manufacture and sale of gypsum board. In July 1975, after the jury was committed to deliberate, it became apparent that the jury was heading for a deadlock. Defense counsel moved for a mistrial, but the trial judge denied the request, although he indicated that, if no verdict were rendered by the end of the week, he would then reconsider the mistrial motions. The following morning, the jury returned guilty verdicts against each of the defendants.

The Court of Appeals for the Third Circuit reversed the convictions, [20] and that ruling was subsequently affirmed by the United States Supreme Court [21] on the grounds that:

  1. The trial judge's instruction to the jury was improper, as it emphasized a presumption of wrongful intent, rather than concentrating on verifying the defendant's state of mind through evidence and inferences drawn therefrom. In that regard, the Sherman Act does not create a regime of strict liability.
  2. A good faith belief, rather than an absolute certainty, that a price concession is being offered to meet an equally low price offered by a competitor suffices to invoke the defense available under § 2(b) of the Clayton Act .
  3. The ex parte meeting between the trial judge and the jury foreman was improper, and the Court of Appeals would have been justified in reversing the convictions solely because of the risk that the foreman believed the judge was insisting on a dispositive verdict.
  4. The trial judge's charge concerning participation in the conspiracy, although perhaps not completely clear, was sufficient, but his charge on withdrawal from the conspiracy was erroneous.
Civil

In 1940, the U.S. Justice Department filed suit against USG and six other wallboard manufacturers, charging them with price fixing under §§ 1 and 2 of the Sherman Act. The claim stemmed from US Gypsum's 1929 cross-licensing agreements for its patented wallboard, which set prices at which the wallboard must be sold. In 1950 the Supreme Court forced US Gypsum and its six licensees who produced all of the wallboard sold east of the Rocky Mountains to cease setting prices, and US Gypsum was enjoined from exercising its patent-licensing privilege. [22]

During 19691974 in the United States District Court for the Northern District of California, a series of civil antitrust cases were heard that came to be known as In re Gypsum Antitrust Cases. [23] As a result, USG (together with National Gypsum Company and Kaiser Gypsum Company) were found to have violated § 1 of the Sherman Act for conspiring to establish and maintain prices of gypsum wallboard.

In December 2012, USG (together with National Gypsum, Lafarge North America and Georgia-Pacific), was accused in a class action for allegedly violating federal antitrust laws, [24] through raising prices on drywall products by as much as 35 percent, as well as halting a longstanding practice of letting customers lock in prices for the duration of a construction project. USG stated that it did not participate, or engage in, any unlawful conduct. [25]

Hostile takeover attempts

In November 1986 the Belzberg brothers of Canada attempted a hostile takeover of USG. USG immediately instituted a plan to buy back 20 percent of its common stock in an effort to fend off the takeover. By December 1986, however, USG had purchased Samuel, William, and Hyman Belzberg's 4.9 percent stake, for $139.6 million.

In October 1987, Texas oilman Cyril Wagner Jr. and Jack E. Brown, through Desert Partners, LP, attempted a hostile takeover of USG, buying 9.84% of USG's outstanding stock. USG decided to fight this attempt by offering $42 per share ($37 in cash and $5 in pay in kind debenture) plus a stub stock worth $7. Desert Partners was unable to match the offer and lost the proxy fight at a shareholder's meeting. To pay for the offer, USG took a poison pill by borrowing $1.6 billion from 135 banks, and issuing $600 million in 13.25% subordinated debentures due in 2000 and $260 million in 16% pay-in-kind debentures due in 2008. To help pay for all the new debt, USG sold off:

and instituted large workforce reductions.

The sell-off and workforce reduction of 7% were not enough to allow USG to service the debt payments ($800,000 per day) in the economic downturn. The poison pill was too much for the corporation to survive.

Bankruptcy

On March 17, 1993, USG filed a pre-packaged bankruptcy petition that included a 50-to-1 reverse stock split. USG's stock dipped to 28 cents per share and the corporation emerged from bankruptcy 38 days later on May 6, 1993. The corporation's debt was reduced by $1.4 billion and interest costs dropped from $320 million per year to $170 million per year. The plan worked and USG re-emerged to be a profitable corporation.

USG once again declared bankruptcy on June 25, 2001, under Chapter 11 to manage the growing asbestos litigation costs. USG was the eighth company in an 18-month period that was forced to utilize Chapter 11 to resolve asbestos claims. In the prior two decades, 27 companies filed for protection under Chapter 11 because of asbestos litigation. Since 1994, U.S. Gypsum was named in more than 250,000 asbestos-related personal injury claims, and paid more than $450 million (before insurance) to manage and resolve asbestos-related litigation. USG received more than 22,000 new claims since the beginning of 2001. USG's asbestos personal injury costs (before insurance) rose from $30 million in 1997 to more than $160 million in 2000, and were expected to exceed $275 million in 2001.

On February 17, 2006, USG announced a Joint Plan of Reorganization to emerge from bankruptcy. [26] Under the agreement, USG would create a trust to pay asbestos personal injury claims. USG's bank lenders, bondholders and trade suppliers would be paid in full with interest. Stockholders would retain ownership of the company. To pay for the trust USG would use cash it had accumulated during the bankruptcy, new long-term debt, a tax rebate from the federal government, and an innovative rights offering. Existing USG stock owners would be issued rights to buy new USG stock at a set price of $40 per share. These rights could be exercised or sold. The $1.8 billion rights offering would be backstopped by Berkshire Hathaway Inc., meaning Berkshire Hathaway would buy all the new shares not bought. For the service, USG would pay Berkshire Hathaway a $67 million non-refundable fee.

On June 20, 2006, USG announced their Joint Plan of Reorganization was confirmed by two judges for the United States Bankruptcy Court and the United States District Court for the District of Delaware, allowing the company to complete the bankruptcy case and emerge from bankruptcy. USG announced a $900 million payment to the new trust was made that day and two subsequent payments totaling $3.05 billion would be made within the next 12 months if Congress failed to enact legislation establishing a national asbestos personal injury trust fund, such as the FAIR Act.

Related Research Articles

<span class="mw-page-title-main">Domtar</span> Largest integrated producer of uncoated free-sheet paper in North America

Domtar Corporation is a North American pulp and paper company that manufactures and markets wood fiber-based pulp and paper products. The company operates pulp mills and paper mills in Windsor, Quebec; Dryden, Ontario; Kamloops, British Columbia; Ashdown, Arkansas; Hawesville, Kentucky; Plymouth, North Carolina; Marlboro County, South Carolina; and Kingsport, Tennessee. While Domtar operated independently for several decades and was listed on the Toronto and New York stock exchanges, the company was acquired by Paper Excellence Group in November 2021 and has since operated as a subsidiary.

<span class="mw-page-title-main">Berkshire Hathaway</span> American multinational conglomerate holding company

Berkshire Hathaway Inc. is an American multinational conglomerate holding company headquartered in Omaha, Nebraska, United States. Founded in 1839 as a textile manufacturer, it underwent a drastic restructuring into a conglomerate starting in 1965 under the leadership of chairman and CEO Warren Buffett and vice chairman Charlie Munger. The company's main business and source of capital is insurance, from which it invests the float in a broad portfolio of subsidiaries, equity positions and other securities. Buffett and Munger are known for their advocacy of value investing principles and under their direction, the company's book value has grown at an average rate of 20%, compared to about 10% from the S&P 500 index with dividends included over the same period, while employing large amounts of capital and minimal debt.

<span class="mw-page-title-main">Drywall</span> Panel made of gypsum, used in interior construction

Drywall is a panel made of calcium sulfate dihydrate (gypsum), with or without additives, typically extruded between thick sheets of facer and backer paper, used in the construction of interior walls and ceilings. The plaster is mixed with fiber ; plasticizer, foaming agent; and additives that can reduce mildew, flammability, and water absorption.

<span class="mw-page-title-main">Fruit of the Loom</span> American clothing manufacturer

Fruit of the Loom is an American company that manufactures clothing, particularly casual wear and underwear. The company's world headquarters is located in Bowling Green, Kentucky. Since 2002, it has been a wholly owned subsidiary of Berkshire Hathaway.

<span class="mw-page-title-main">Johns Manville</span> American manufacturing corporation

Johns Manville is an American company based in Denver, Colorado, that manufactures insulation, roofing materials and engineered products. For much of the 20th century, the then-titled Johns-Manville Corporation was the global leader in the manufacture of asbestos-containing products, including asbestos pipe insulation, asbestos shingles, asbestos roofing materials and asbestos cement pipe.

<span class="mw-page-title-main">BPB plc</span> British building materials business

BPB Ltd was a British building materials business. It once was a constituent of the FTSE 100 Index. In 2005, the company was purchased by Saint-Gobain of France. The company's subsidiary British Gypsum, which was the UK operating arm of the company, operates as a subsidiary of Saint-Gobain, with five manufacturing sites in Britain as of 2012.

<span class="mw-page-title-main">Lath</span> Material used to span gaps in structural framing and form a base on which to apply plaster

A lath or slat is a thin, narrow strip of straight-grained wood used under roof shingles or tiles, on lath and plaster walls and ceilings to hold plaster, and in lattice and trellis work.

<span class="mw-page-title-main">Joint compound</span> A paste of gypsum powder and water that fills seams around sheets of drywall

Joint compound is a white powder of primarily gypsum dust mixed with water to form a paste the consistency of cake frosting, which is spread onto drywall and sanded after dry to create a seamless base for paint on walls and ceilings.

<span class="mw-page-title-main">Gypsum, Ohio</span> Unincorporated community in Ohio, United States

Gypsum is an unincorporated community in eastern Portage Township, Ottawa County, Ohio, United States. It has a post office with the ZIP code 43433.

Pillowtex Corporation was a United States textile manufacturing company from 1954 to 2003. Beginning as a pillow manufacturer, the company diversified and manufactured bedsheets under various brand names. The company was officially declared bankrupt on October 7, 2003. The company liquidated over the following nine years, including machinery and brands.

<span class="mw-page-title-main">Magnesium oxide wallboard</span>

Magnesium oxide, more commonly called magnesia, is a mineral that when used as part of a cement mixture and cast into thin cement panels under proper curing procedures and practices can be used in residential and commercial building construction. Some versions are suitable for general building uses and for applications that require fire resistance, mold and mildew control, as well as sound control applications. Magnesia board has strength and resistance due to very strong bonds between magnesium and oxygen atoms that form magnesium oxide crystals.

<span class="mw-page-title-main">Chinese drywall</span> Environmental health issue involving defective drywall manufactured in China

"Chinese drywall" refers to an environmental health issue involving defective drywall manufactured in China, imported to the United States and used in residential construction between 2001 and 2009 – affecting "an estimated 100,000 homes in more than 20 states".

<span class="mw-page-title-main">Demolition waste</span> Waste debris from destruction of buildings, roads, bridges, or other structures

Demolition waste is waste debris from destruction of buildings, roads, bridges, or other structures. Debris varies in composition, but the major components, by weight, in the US include concrete, wood products, asphalt shingles, brick and clay tile, steel, and drywall. There is the potential to recycle many elements of demolition waste.

CertainTeed is a North American manufacturer of building materials for both commercial and residential construction and is a wholly owned subsidiary of Saint-Gobain SA, based in Paris.

National Gypsum Company is a company based in Charlotte, North Carolina, that produces drywall gypsum boards in the US. It has 17 gypsum board plants in the US and presents itself as a fully integrated building products manufacturer. It is a private company, incorporated as New NGC, Inc. in 1993 after previously filing for Chapter 11 bankruptcy in 1990. It is one of the six producers which hold approximately 81% of the worldwide wallboard market

<span class="mw-page-title-main">Knauf</span> Building materials company

Knauf Group is a multinational, family-owned company based in Iphofen, Germany, well known for drywall gypsum boards, founded in 1932. The company is a producer of building materials and construction systems comprising construction materials for drywall construction, plasterboard, cement boards, mineral fibre acoustic boards, dry mortars with gypsum for internal plaster and cement-based external plaster and insulating materials; glass wool, stone wool and other insulation materials under the company Knauf Insulation.

<span class="mw-page-title-main">Gypsum block</span>

Gypsum block is a massive lightweight building material composed of solid gypsum, for building and erecting lightweight, fire-resistant, non-load bearing interior walls, partition walls, cavity walls, skin walls, and pillar casing indoors. Gypsum blocks are composed of gypsum, plaster, water and in some cases additives like vegetable or wood fiber for greater strength. Partition walls, made from gypsum blocks, require no sub-structure for erection and gypsum adhesive is used as bonding agent, not standard mortar. Because of this fundamental difference, gypsum blocks shouldn't be confused with the thinner plasterboard used for paneling stud walls.

Gypsum recycling is the process of turning gypsum waste into recycled gypsum, thereby generating a raw material that can replace virgin gypsum raw materials in the manufacturing of new products.

<span class="mw-page-title-main">Clay panel</span> Building material made of clay with some additives

Clay panel or clay board is a panel made of clay with some additives. The clay is mixed with sand, water, and fiber, typically wood fiber, and sometimes other additives like starch. Most often this means employing the use of high-cellulose waste fibres. To improve the breaking resistance clay boards are often embedded in a hessian skin on the backside or similar embeddings.

Celotex Corporation is a defunct American manufacturer of insulation and construction materials. It was the subject of a number of high-profile lawsuits over products containing asbestos in the 1980s, eventually declaring Chapter 11 bankruptcy in 1990.

References

Citations

  1. "USG". Fortune. Archived from the original on 2019-06-30. Retrieved 2019-02-28.
  2. "About USG". USG.com. 2010. Retrieved 2011-05-12.
  3. "SHEETROCK® Brand Gypsum Panels". USG. Retrieved 2013-01-19.
  4. "Securock® Brand Glass-Mat Sheathing". USG. Retrieved 2018-06-27.
  5. "Sheetrock® Brand All Purpose Joint Compound". USG. Retrieved 2018-06-27.
  6. "Berkshire Hathaway agrees to pay $896,000 civil penalty". Big News Network.com. 20 August 2014. Retrieved 20 August 2014.
  7. "Knauf and USG Agree to Transaction at $44 Per Share in Cash" (Press release). Iphofen, Germany and Chicago: Knauf/USG. Business Wire. June 11, 2018.
  8. "Knauf Completes Acquisition of USG Corporation" (Press release). Iphofen, Germany and Chicago: Knauf/USG. Business Wire. April 24, 2019.
  9. "The true story of Empire, Nevada, the tiny desert town from 'Nomadland' that shut down in 2011, forcing all of its residents out". ca.finance.yahoo.com. 23 April 2021. Retrieved 2021-05-16.
  10. "1999 SEC Form 10K for USG CORPORATION". Archived from the original on 2019-03-25. Retrieved 2019-03-25.
  11. 2011 Form 10-K, Exhibit 10.21
  12. "Designation of Christiana Investors, L.L.C. as project developer, authorization for execution of redevelopment agreement and agreement and issuance of tax increment allocation revenue note for the property at 550 West Adams Street" (PDF). City of Chicago-City Council Journal. 23 June 2004. Retrieved 2011-05-12.
  13. closer to Mediapolis than to Sperry
  14. 32°47′33″N115°51′31″W / 32.79250°N 115.85861°W
  15. "US Geological Survey Bulletin 1711: Mineral Resources of the Fish Creek Mountains Wilderness Study Area, Imperial County, California" (PDF). United States Geological Survey. 1987. Retrieved 2013-01-21.
  16. Houk, Randy (11 January 2011). "U.S. Gypsum Company-Hopper Car". San Diego Railway Museum. Retrieved 2011-05-12.
  17. "SP Bulletin 1964  They call it Plaster City". San Diego Railway Museum. Archived from the original on November 4, 2005. Retrieved December 14, 2005.
  18. "PacificNG.org". www.pacificng.com.
  19. "USG". www.wopi.es.
  20. United States v. United States Gypsum Co., 550 F.2d 115 (1977)
  21. United States v. United States Gypsum Co., 438 U.S. 422 (1978)
  22. United States v. United States Gypsum Co., 333 U.S. 364 (1948), followed by United States v. United States Gypsum Co., 340 U.S. 76 (1950)
  23. Wall Products v. National Gypsum, 326F.Supp.295 (N.D.Cal.March 18, 1971)., Wall Products v. National Gypsum, 357F.Supp.832 (N.D.Cal.June 6, 1973)., and In Re Gypsum Cases, 386F.Supp.959 (N.D.Cal.August 19, 1974).
  24. Sierra Drywall Systems Inc. v. USG Corp., 12-CV-09949, United States District Court for the Northern District of Illinois
  25. Smythe, Christie; Harris, Andrew (December 17, 2012). "USG Accused in Lawsuit of Fixing Drywall Prices". Bloomberg L.P. Retrieved January 18, 2013.
  26. "USG CORP, Form 8-K, Current Report, Filing Date Jun 21, 2006". secdatabase.com. Retrieved May 15, 2018.

Book references

Web references