Question: Huntington Ingalls Industries and Charles Schwab Corporation, are American companies?

Context paragraphs:
Sa'ar 5-class corvette: Sa'ar 5 (Hebrew: סער 5‎ ‎ ) is a class of Israeli Navy corvettes, designed based on lessons learned from the Sa'ar 4.5-class missile boat s. Three Sa'ar 5 ships were built by Huntington Ingalls Industries (formerly Litton-Ingalls Shipbuilding Corporation of Pascagoula, Mississippi) for the Israeli Navy, based on Israeli designs.

Charles R. Schwab: Charles Robert Schwab (born July 29, 1937) is an American investor, financial executive, and philanthropist.  He is the founder and chairman of the Charles Schwab Corporation.  He pioneered discount sales of equity securities starting in 1975.  His company became by far the largest discount securities dealer in the United States.  He retired as CEO in 2008, but remains chairman and is the largest shareholder.

Ingalls Shipbuilding: Ingalls Shipbuilding is a shipyard located in Pascagoula, Mississippi, United States, originally established in 1938, and is now part of Huntington Ingalls Industries.  It is a leading producer of ships for the United States Navy, and at 12,500 employees, the largest private employer in Mississippi.

Charles Schwab Corporation: The Charles Schwab Corporation is a bank and brokerage firm, based in San Francisco, California.  It was founded in 1971 by Charles R. Schwab.  It is on the list of largest banks in the United States and is one of the largest brokerage firms in the United States.  The company provides services for individuals and institutions that are investing online.  The company offers an electronic trading platform for the purchase and sale of financial securities including common stocks, preferred stocks, futures contracts, exchange-traded funds, options, mutual funds, and fixed income investments.  It also provides margin lending, and cash management services.  The company also provides services through registered investment advisers.

Avondale Shipyard: Avondale Shipyard was an independent shipbuilding company, acquired by Litton Industries, in turn acquired by Northrop Grumman Corporation.  In 2011, along with the former Ingalls Shipbuilding, the yard was part of Huntington Ingalls Industries.

USS Essex (LHD-2): USS "Essex" (LHD-2) is a United States Navy "Wasp"-class amphibious assault ship built at what is now Huntington Ingalls Industries in Pascagoula, Mississippi, and commissioned on 17 October 1992 while moored at North Island NAS beside USS "Kitty Hawk" .  It is the fifth ship named for Essex County, Massachusetts.  "Essex" served as the command ship for Expeditionary Strike Group Seven until replaced by USS "Bonhomme Richard" on 23 April 2012.  "Essex" collided with USNS "Yukon" in May 2012.

Huntington Ingalls Industries: Huntington Ingalls Industries (HII) is an American Fortune 500 shipbuilding company formed on March 31, 2011 as a spin-off of Northrop Grumman.

USS John Warner: USS "John Warner" (SSN-785) is a "Virginia"-class submarine of the United States Navy.  It is the first in the class to be named after a person; the first 11 "Virginia"-class subs were named after states.  "John Warner" was originally to be built by the Electric Boat division of General Dynamics in Groton, Connecticut but the contract was later transferred to Huntington Ingalls Industries Newport News Shipbuilding.  This ship is the second of the Block III subs, which will have a revised bow and some technology from "Ohio"-class cruise missile submarines.  The vessel supports 40 weapons, special operations forces, unmanned undersea vehicles, Advanced SEAL Delivery System (ASDS).

Camber Corporation: Camber Corporation is a defense contractor headquartered in Huntsville, Alabama.  It was acquired by Huntington Ingalls Industries on December 2, 2016 and is in the process of being reorganized as a division within that company.  Once that reorganization is complete, Camber Corporation will cease to exist.

USS Delaware (SSN-791): USS "Delaware" (SSN-791) will be a "Virginia"-class submarine .  The contract to build her was awarded to Huntington Ingalls Industries in partnership with the Electric Boat division of General Dynamics in Newport News, Virginia on 22 December 2008.  This ship is the eighth and final ship of the Block III subs that will feature a revised bow, including some technology from "Ohio"-class SSGNs.  Construction on Delaware began in September 2013.  The submarine is about 56 percent complete.  She is scheduled for deployment in 2018.

Supporting paragraphs: Huntington Ingalls Industries Charles Schwab Corporation
Answer: yes