SEC Filing Document

Company: Berto Acquisition Corp. II
Ticker: GUAC
CIK: 2081515
Filing Type: S-1/A
Document Type: S-1/A
Date Filed: 2026-05-12
Accession Number: 0001829126-26-005001
Exchange: 
SIC Code: 6770
SIC Description: Blank Checks
URL: https://www.sec.gov/Archives/edgar/data/2081515/000182912626005001/bertoacquisition2_s1a.htm

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Before transitioning to the buy-side, Mr. Mittal was part of the founding team that launched Raymond James’ TMT investment banking practice in Palo Alto, California, beginning in 2002. Mr. Mittal earned a B.S. in Finance, summa cum laude, from the University of Florida and an MBA from NYU Stern School of Business. He is also a CFA charterholder. Robert You has served as our President and Chief Financial Officer since April 2026. Robert You served as an Investment Banking Analyst at J.P. Morgan from June 2025 to April 2026, where he gained experience in financial analysis and capital markets transactions. Robert You has also served as the Vice President of Corporate Development of First Berto since March 2025 until July 2025. Robert You earned a B.A. in Economics from Yale University. Table of Contents Prior SPAC Experience Harry L. You, our founder, has extensive experience with SPACs. Berto Acquisition Corp.

In July 2024, Harry You
founded Berto Acquisition Corp., a blank check company formed for substantially similar purposes as our company, in which Harry You
serves as the Chief Executive Officer and Executive Chairman. From April 2025 until his resignation in June 2025, Mr. You
also served as Interim Chief Financial Officer of First Berto. In May 2025, First Berto completed its upsized initial public offering,
in which it raised gross proceeds of approximately $300,150,000. First Berto is searching for a business combination target. First Berto’s
units, Class A ordinary shares, and warrants trade on Nasdaq under the symbols “TACOU”, “TACO”, and “TACOW”,
respectively. On May 8, 2026, the closing sale prices of TACOU, TACO and TACOW were $10.64, $10.37, and $0.56, respectively.

dMY Squared Technology Group, Inc.

In February 2022, Harry You
founded dMY Squared Technology Group, Inc., a blank check company formed for substantially similar purposes as our company. Harry You
has served as Chairman of the Board and a Director of dMY Squared since March 2022, as well as Chief Financial Officer since February 2022.
From March 2022 until his resignation in March 2023, Harry You also served as Co-Chief Executive Officer of dMY Squared.
dMY Squared completed its initial public offering in September 2022, in which it raised gross proceeds of approximately $63,190,000.
On January 2, 2024, dMY Squared held a special meeting of shareholders to extend the date by which it must complete a business combination
from January 4, 2024 to January 29, 2025, and month to month thereafter up to December 29, 2025, provided that $50,000
is deposited into the trust account for each month of the extension. In connection with the extension, approximately 3,980,414 public
shares were redeemed, representing approximately 66.3% of the public shares issued in dMY Squared’s initial public offering. On
September 9, 2025, dMY Squared entered into a business combination agreement with Horizon, a business formed to develop operating
systems software and software development tools for quantum computing and related services. On December 4, 2025, dMY Squared and
Horizon entered into subscription agreements with certain institutional and accredited investors, qualified institutional buyers and
strategic investors to purchase approximately $110 million of Class A ordinary shares in a private placement. On December 15, 2025, dMY
Squared held a special meeting of shareholders to further extend the date by which it must complete a business combination from December
29, 2025 to January 29, 2026, and month to month thereafter up to June 29, 2026. In connection with this second extension, approximately
12,599 public shares were redeemed, representing approximately 0.2% of the public shares issued in dMY Squared’s initial public
offering, with approximately $27 million remaining in the trust account of dMY Squared following redemptions. In connection with the
special meeting of stockholders of dMY Squared to approve the business combination with Horizon, shareholders holding 1,403,777 public
shares exercised their rights to redeem those shares for cash at a price of approximately $11.82 per share for an aggregate of $16.47
million. Together with the public shares submitted for redemption in connection with the extension meetings as described above, approximately
85.4% of the public shares issued in dMY Squared’s initial public offering were redeemed. Following the closing, Class A ordinary
shares and warrants of Horizon Quantum Holdings Ltd. began trading on Nasdaq on March 20, 2026 under the ticker symbols “HQ”
and “HQWWW,” respectively. On May 8, 2026, the closing sale prices of HQ and HQWWW were $10.27 and $2.69, respectively. As
of May 8, 2026, the aggregate market capitalization of Horizon Quantum Holdings Ltd. reflects a market value of approximately $326.9
million.

Coliseum Acquisition Corp./Rain Enhancement Technologies, Inc.

Coliseum Acquisition Corp.
is a blank check company formed for substantially similar purposes as our company. Coliseum completed its initial public offering in
June 2021, in which it raised gross proceeds of approximately $150,000,000. Harry You acquired (directly and indirectly) 70%
of the founder shares and private placement warrants of Coliseum from its previous sponsor in June 2023, and became Chairman of
the Board of Directors of Coliseum. In June 2023, November 2023, September 2024 and December 2024, Coliseum held
shareholder meetings to extend the date by which it must complete a business combination, and in connection therewith, 9,121,799 public
shares, 3,001,840 public shares, 1,089,249 public shares, and 856,188 public shares were redeemed. Coliseum completed its initial business
combination with RAIN, a business formed to develop, improve and commercialize ionization rainfall generation technology, in December
2024. In connection with the special meeting of stockholders of Coliseum to approve the business combination with RAIN, shareholders
holding 505,207 public shares exercised their rights to redeem those shares for cash at a price of approximately $11.41 per share for
an aggregate of $2.37 million. Together with the public shares submitted for redemption in connection with the extension meetings as
described above, approximately 97.16% of the public shares issued in Coliseum’s initial public offering were redeemed. Following
the closing, Mr. You serves as chairman of RAIN. RAIN’s Class A common stock and warrants began trading on Nasdaq on January 2,
2025 under the ticker symbols “RAIN” and “RAINW,” respectively. On May 8, 2026, the closing sale prices of RAIN
and RAINW were $1.27 and $0.16, respectively. As of May 8, 2026, the aggregate market capitalization of RAIN reflects a market value
of approximately $10.3 million.

Table of Contents

dMY Technology Group, Inc. VI

In April 2021, Harry You founded dMY Technology Group, Inc. VI, a blank check company formed for substantially similar purposes as our company. Harry You served as co-chairman of the board of dMY VI from April 2021 to April 2023. dMY VI completed its initial public offering in September 2021, in which it raised gross of approximately $210,000,000. On December 22, 2022, dMY VI announced that it had entered into a definitive agreement for a business combination with Rain Enhancement Technologies, Inc. The business combination was unsuccessful and dMY VI liquidated on April 27, 2023. Prior to its liquidation, dMY VI’s units, Class A common stock and warrants were traded on the New York Stock Exchange under the symbols “DMYS.U,” “DMYS” and “DMYS WS”, respectively.

dMY Technology Group, Inc. IV/Planet Labs Inc.

In December 2020, Harry You
founded dMY Technology Group, Inc. IV, a blank check company formed for substantially similar purposes as our company. Harry You
served as a director of dMY IV from December 2020 to December 2021. dMY IV completed its initial public offering in February 2021,
in which it raised gross proceeds of approximately $340,000,000. dMY IV completed its initial business combination with Planet Labs,
an Earth observation and analysis company, in November 2021, which transaction valued Planet Labs at a post-transaction equity value
of approximately $2.8 billion. There was no vote held to extend the date by which dMY IV must consummate a business combination because
it consummated its initial business combination within 24 months of its initial public offering. In connection with the special meeting
of stockholders of dMY IV to approve the business combination with Planet Labs, holders of 689,670 shares of dMY IV Class A common stock
sold in its initial public offering, or approximately 2.0% of the outstanding public shares, exercised their right to redeem those shares
for cash at a price of approximately $10.00 per share, or $6.9 million in the aggregate. dMY IV and Planet Labs raised a PIPE in the
amount of $252 million in connection with the business combination. Following the business combination, Harry You served as a director
of Planet Labs from December 2021 to April 2023. Planet Labs’ Class A common stock is traded on the New York Stock Exchange
under the symbols “PL”. On May 8, 2026, the closing sale price of PL was $39.04. As of May 8, 2026, the aggregate market
capitalization of Planet Labs reflects a market value of approximately $13.0 billion.

dMY Technology Group, Inc. III/IonQ, Inc.