Sept 14 (Reuters) - Arm Holdings secured a $54.5
billion valuation in its U.S. initial public offering (IPO) on
Wednesday, seven years after its owner SoftBank Group
took the chip designer private for $32 billion.
    The Japanese investment giant sold 95.5 million American
Depositary shares of Arm at $51 apiece to raise $4.87 billion in
the listing.
    Last month, SoftBank signed a deal to buy the 25% stake it
did not already own in Arm from its $100 billion Vision Fund,
enabling it to sell fewer Arm shares in the IPO. 
    
Below is a timeline of key events:
 Date             Development 
 July 17, 2016    SoftBank says it will buy Arm for $32
                  billion in cash, taking it private 
 June 17, 2019    Nvidia says it will make its chips work
                  with processors from Arm to build
                  supercomputers 
 July 22, 2020    Arm gathers takeover interest from
                  Nvidia, Bloomberg reports
 Sept 12, 2020    Nvidia nears a deal to buy Arm from
                  SoftBank for more than $40 billion,
                  sources tell Reuters 
 Sept 13, 2020    Nvidia says it will buy Arm from SoftBank
                  for as much as $40 billion 
 Sept 14, 2020    British government says it will
                  scrutinize Nvidia's deal to buy Arm,
                  including what it might mean for the
                  company's headquarters in England
 Sept 15, 2020    An op-ed in China's state-backed Global
                  Times says Nvidia's planned acquisition
                  of Arm from SoftBank was "disturbing"
 Sept 21, 2020    Britain's digital minister says assessing
                  the impact of the sale of Arm, including
                  commitments to keep its head office and
                  staff in Cambridge
 Jan 6, 2021      Britain's competition regulator says it
                  would start an investigation into
                  Nvidia's deal to buy Arm
 Feb 12, 2021     The U.S. Federal Trade Commission opens
                  an in-depth probe into Nvidia's 
                  agreement to acquire Arm, Bloomberg
                  reports 
 April 19, 2021   The UK government says it will look into
                  the national security implications of
                  Nvidia's purchase of Arm  
 July 2, 2021     Arm CEO says deal with Nvidia is better
                  than becoming a standalone public company
                  once again 
 Aug 3, 2021      The UK government is considering blocking
                  the acquisition of Arm on potential
                  national security risks, Bloomberg News
                  reports 
 Aug 20, 2021     Nvidia deal for Arm hits a major hurdle
                  after a UK regulator finds it could
                  damage competition and weaken rivals, and
                  requires a further lengthy investigation
 Aug 27, 2021     European Union is set to launch a formal
                  competition probe into Nvidia's planned
                  takeover of Arm in early September, the
                  Financial Times reports
 Oct 27, 2021     EU antitrust regulators open a four-month
                  long investigation into Nvidia's bid for
                  Arm
 Nov 16, 2021     Britain orders an in-depth investigation
                  of Nvidia's deal for Arm 
 Dec 2, 2021      The U.S. FTC sues to block Nvidia's deal
                  for Arm 
 Dec 6, 2021      U.S. FTC says competition in the nascent
                  markets for chips in self-driving cars
                  and a new category of networking chips
                  could be hurt if Nvidia carries out its
                  purchase of Arm
 Feb 7, 2022      SoftBank shelves its blockbuster sale of
                  Arm to Nvidia, citing regulatory hurdles,
                  and will instead seek to list the company
 June 22, 2022    British PM Boris Johnson's spokesman says
                  he was not aware of any plans to try to
                  compel Arm to list in London after the
                  Financial Times reported that officials
                  were considering such a move
 June 24, 2022    SoftBank founder and CEO Masayoshi Son
                  reiterates it was most likely to list Arm
                  on Nasdaq, while stressing no decision
                  has been made
 March 5, 2023    Arm likely to aim to raise at least $8
                  billion from what is expected to be a
                  blockbuster U.S. stock market launch this
                  year, sources tell Reuters 
 April 29, 2023   Reuters first reports, citing sources,
                  Arm has filed with regulators
                  confidentially for a U.S. stock market
                  listing
 June 12, 2023    Arm is in talks with some of its biggest
                  customers and end-users about bringing on
                  one or more anchor investors, sources
                  tell Reuters.
 Aug 8, 2023      Apple          and Samsung Electronics
                              will invest in Arm at its
                  IPO, expected in September, Japan's
                  Nikkei newspaper reports
 Aug 8, 2023      Reuters first reports Amazon.com         
                  is in talks about joining other
                  technology companies as a cornerstone
                  investor in IPO
 Aug 13, 2023     Reuters first reports SoftBank is in
                  talks to acquire the 25% stake in Arm it
                  does not directly own from Vision Fund 1
                  (VF1)
 Aug 22, 2023     Arm's annual revenue dropped 1% due to a
                  slowdown in smartphone sales, it
                  discloses in its paperwork for a U.S. IPO
 Aug 23, 2023     Reuters first reports Arm has signed up
                  28 banks for its IPO without giving them
                  a fee arrangement
 Aug 31, 2023     Arm plans to launch its roadshow for
                  investors after Labor Day, sources tell
                  Reuters 
 Sept 1, 2023     Reuters first reports customers of Arm
                  including Apple, Nvidia, Alphabet
                            and Advanced Micro Devices
                          have agreed to invest in IPO
 Sept 1, 2023     Arm is targeting a valuation between $50
                  billion and $55 billion for its
                  much-awaited IPO, sources tell Reuters 
 Sept 2, 2023     Reuters first reports Arm is planning to
                  ask investors to pay $47 to $51 for each
                  of its shares when it begins marketing
                  its IPO
 Sept 5, 2023     SoftBank launches the roadshow for Arm's
                  blockbuster IPO
 Sept 8, 2023     Arm sees investor demand that is six
                  times the amount it is asking for its
                  shares, a source tells Reuters 
 Sept 10, 2023    Reuters first reports Arm is getting
                  close to securing enough investor support
                  to attain the fully diluted valuation of
                  $54.5 billion it was seeking in its IPO
                  at the top of its indicated range, and is
                  considering asking investors to value it
                  higher 
 Sept 12, 2023    Reuters first reports Arm received enough
                  backing from investors to secure at least
                  the top end of the price range in its
                  IPO, which would command a $54.5 billion
                  fully diluted valuation 
 Sept 13, 2023    Reuters first reports Arm has priced its
                  IPO at $51 apiece to raise $4.87 billion
 Sept 13, 2023    Arm secures a $54.5 billion valuation in
                  its IPO
 
 (Reporting by Manya Saini in Bengaluru; Editing by Janane
Venkatraman and Maju Samuel)