Tyco's success was largely attributed to ambitious acquisitions of Simplex Technology, Grinnell Fire Protection Systems, Armin Plastics and the Ludlow Corporation.

[5] Once organized, Tyco returned to the strategy of growth by acquisition in the later part of the decade acquiring Grinnell Corporation, Allied Tube and Conduit, and the Mueller Company.

Tyco then again reorganized its subsidiaries into four segments: Electrical and Electronic Components, Healthcare and Specialty Products, Fire and Security Services and Flow Control.

This reorganization remained in place until 2007 when current CEO Ed Breen spun off the Electrical and Healthcare segments to create three publicly independent companies.

[citation needed] Major acquisitions in the 1990s included: Wormald International Limited, Neotecha, Hindle/Winn, Classic Medical, Uni-Patch, Promeon, Preferred Pipe, Kendall International Co., Tectron Tube, Unistrut, Earth Technology Corporation, Professional Medical Products, Inc., Thorn Security, Carlisle, Watts Waterworks Businesses, Sempell, ElectroStar, American Pipe & Tube, Submarine Systems Inc., Keystone, INBRAND, Sherwood Davis & Geck, United States Surgical, Wells Fargo Alarm, AMP, Raychem, Glynwed, Temasa and Central Sprinkler designs.

In 1996, Tyco was added to the Standard & Poor's S&P 500 Composite Index, which consists of the 500 publicly traded companies in the United States with the largest market capitalization.

[6] In 1997, Tyco acquired AT&T Submarine Systems, gaining research and development and fleet assets, along with the manufacturing capability to produce repeaters and transmission equipment.

[7] These additional capabilities, combined with cable manufacturing at Tyco Integrated Cables Systems in Newington, New Hampshire, established Tyco Telecommunications as the world's first vertically integrated global optical network supplier, capable of developing the technology and manufacturing the components, to designing, building and maintaining systems.

In July 1997, Tyco merged by reverse takeover with a smaller publicly traded security services company named ADT Limited, controlled by Michael Ashcroft.

[10][11] Tyco's aggressive acquisition strategy continued into the early 2000s, with the purchases of General Surgical Innovations, Siemens Electromechanical Components, AFC Cable and Praegitzer.

[5] In the fiscal 2000 year, Tyco acquired Mallinckrodt Inc, a subsidiary of United States Surgical Corporation and Simplex Time Recorder Company which it merged in January 2002 with Grinnell Fire Protection to form an indirect wholly owned subsidiary, SimplexGrinnell LP, the world's largest fire protection company.

Mallinckrodt US LLC is a subsidiary of United States Surgical Corporation, and an affiliate of Medtronic plc, the ultimate parent company of both entities".

[13] In October 2001, the Engineered Products and Services segment acquired Century Tube Corp, and followed it by buying Water & Power Technologies in November 2001.

The second, costing the electronics segment $250 million related to sales issues in Power Systems, Electrical Contracting Services, and the Printed Circuit Group.

[14] To add to the financial woes of the company, midway through the fiscal 2002 year, Tyco became embroiled in a massive scandal involving the excesses by its former chairman and CEO, L. Dennis Kozlowski, and his senior management team.

Early 2002, Tyco was alleged in violation of the Securities Exchange Act of 1934 by nondisclosure of major financial information and artificially inflating its earnings.

[16] Breen made an immediate impact on Tyco by gutting the existing board of directors and leadership team that worked with Kozlowski and replacing them with a new set of managers.

The largest divestiture came in the announcement of a definitive agreement to sell its Plastics, Adhesives and Ludlow Coated Products businesses to an affiliate of private investment firm Apollo Management, L.P. Tyco believed the segment no longer fit within the company's portfolio.

[citation needed] On February 16, 2006, a group of institutional investors, part of an existing lawsuit against Tyco International, sued the company to stop its proposed breakup plan.

[1] Tyco filed against Kozlowski, asserting that the $500 million in compensation and benefits he received during his time of disloyalty, between 1997 and 2002, were forfeit under New York's "faithless servant" doctrine.

[23][24][25] Southern District of New York Judge Thomas Griesa concluded in 2010 that under the faithless servant doctrine, Kozlowski must forfeit all compensation and benefits he earned during his period of disloyalty.

"[32] The separation was completed on October 1, 2012, resulting in the following companies being created: Tyco retained use of the ADT brand for security installation and services outside of North America.

In September 2012, Tyco was accused of violation of the Foreign Corrupt Practices Act (FCPA) and agreed to a payment of around $13 million in civil penalties to the U.S. Securities and Exchange Commission.

[38] Then in May 2007, New Hampshire Federal District Court Judge Paul Barbadoro approved a class action settlement whereby Tyco agreed to pay $2.92 billion (in conjunction with $225 million by Pricewaterhouse Coopers, their auditors) to a class of defrauded shareholders represented by Grant & Eisenhofer P.A., Schiffrin, Barroway, Topaz & Kessler, and Milberg Weiss & Bershad.

[45] However, the wastewater discharged from the factory exceeded the levels of copper and lead, which were both toxic metals and could have led to harmful effects if passed through sewage treatment plants.

[44] Tyco Printed Circuit Group (TPCG) of Stamford, Connecticut, was sentenced on 12 counts of violating the Clean Water Act in August 2004.

Of that amount, $6 million was paid as a federal criminal fine; $2.7 million went to the Connecticut Department of Environmental Protection's (DEP) natural resources fund; the Towns of Stafford and Manchester received $500,000 each to fund improvements in their sewer and water treatment system; and $300,000 was paid for recycling deionized and other wastewater at the company's Stafford, Staffordville facilities.

[46] Daniel R. Callahan, the former Director of Environmental Health and Safety of Stafford Division of Tyco Printed Circuit Group, pleaded guilty to violating the Clean Water Act on November 17, 2003.

[51] On October 24, 2002, the company restated its earnings for earlier in the year 2002 because of questions raised in an internal audit over it how it accounted for dealer fees involving its ADT home security systems business.

[52] On June 16, 2003, the company restated several years of financial results in connection with securities regulators' previously announced review of its filings.