SEC Filing Document

Company: Berto Acquisition Corp. II
Ticker: GUAC
CIK: 2081515
Filing Type: S-1
Document Type: EX-10.1
Date Filed: 2026-04-27
Accession Number: 0001829126-26-003952
Exchange: 
SIC Code: 6770
SIC Description: Blank Checks
URL: https://www.sec.gov/Archives/edgar/data/2081515/000182912626003952/bertoacquisition2_ex10-1.htm

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forth in the first sentence of this paragraph shall be adjusted to such number of Founder Shares that the Sponsor and/or the Investors would have to surrender to the Company in order for the outstanding Founder Shares to equal 20.0% of the Company’s issued and outstanding Ordinary Shares after the Public Offering (exclusive of any securities purchased in a private placement simultaneously with the Public Offering). For avoidance of doubt, notwithstanding the foregoing, the shares held by the Consultant, the individual investor, Oanh Truong, and their respective successor or permitted assignees shall not be subject to the forfeiture in the event that the Underwriters do not fully exercise their over-allotment option, and the shares held by the Consultant, Oanh Truong, and their respective successor or permitted assignees shall not be subject to the share repurchase or share capitalization in the event of a downsize or upsize of the Public Offering.

7.	The Sponsor, the Consultant, each Insider and each Investor hereby agrees and acknowledges that: (i) the Underwriters and the Company
would be irreparably injured in the event of a breach by such Sponsor, an Insider, or a Investor of its, his or her obligations under
paragraphs 1, 2, 3, 4, 5, 6, 8(a), and 8(b), as applicable, of this Letter Agreement, (ii) monetary damages may not be an adequate remedy
for such breach and (iii) the non-breaching party shall be entitled to injunctive relief, in addition to any other remedy that such party
may have in law or in equity, in the event of such breach.

8.	(a)	The Sponsor, the Consultant, each Insider and each Investor agrees that it, he or she shall not Transfer any Founder Shares (or any Ordinary
Shares issuable upon conversion thereof) until the earlier of (A) one year after the completion of the Company’s initial Business
Combination and (B) subsequent to the Business Combination, (x) if the closing price of the Ordinary Shares equals or exceeds $12.00
per share (as adjusted for share sub-divisions, share capitalizations, reorganizations, recapitalizations and the like) for any 20 trading
days within any 30-trading day period commencing at least 150 days after the Company’s initial Business Combination or (y) the
date on which the Company completes a liquidation, merger, share exchange or other similar transaction that results in all of the Company’s
Public Shareholders having the right to exchange their shares of Ordinary Shares for cash, securities or other property (the “ Founder
Shares Lock-up Period ”).

(b)	The Sponsor and each Insider agrees that it, he or she shall
not Transfer any Private Placement Warrants (or any Ordinary Shares underlying the Private Placement Warrants), until 30 days after the
completion of a Business Combination (the “ Private Placement Warrants Lock-up Period ”, together with the Founder
Shares Lock-up Period, the “ Lock-up Periods ”).

(c)	Notwithstanding the provisions set forth in paragraphs 7(a)
and 7(b), Transfers of the Founder Shares, Private Placement Warrants and the Ordinary Shares underlying the Founder Shares and Private
Placement Warrants that are held by the Sponsor, the Consultant, any Insider, any Investor, or any of their permitted transferees (that
have complied with this paragraph 7(c)), are permitted (i) as applicable, to the Company’s officers or directors, any affiliate
or family member of any of the Company’s officers or directors, any affiliate of the Sponsor or the Consultant, any members or
partners of the Sponsor, the Consultant, or any of their affiliates, or to any affiliate of the Consultant or any Investor or any members,
shareholders, or partners of the Consultant or an Investor or any of their affiliates; (ii) in the case of an individual, by gift to
a member of such individual’s immediate family or to a trust, the beneficiary of which is a member of such individual’s immediate
family, an affiliate of such individual or to a charitable organization; (iii) in the case of an individual, by virtue of laws of descent
and distribution upon death of such individual; (iv) in the case of an individual, pursuant to a qualified domestic relations order;
(v) by private sales or transfers made in connection with any forward purchase agreement or similar arrangement or in connection with
the consummation of an initial Business Combination, or in connection with an extension of the timeframe for the Company to consummate
a Business Combination, at prices no greater than the price at which the securities were originally purchased; (vi) by virtue of the
laws of the Cayman Islands, the Sponsor’s operating agreement upon dissolution of the Sponsor or any Insider’s or Investor’s
formation documents upon the dissolution of such Insider or Investor; (vii) to the Company for no value for cancellation in connection
with the consummation of an initial Business Combination; (viii) in the event of the Company’s liquidation prior to the completion
of an initial Business Combination; (ix) to a nominee or custodian of a person or entity to whom a disposition or transfer would be permissible
under clauses (i) through (vi) above; and (x) in the event that, subsequent to the consummation of an initial Business Combination, the
Company completes a liquidation, merger, share exchange or other similar transaction which results in all of the Company’s shareholders
having the right to exchange their Ordinary Shares for cash, securities or other property; provided, however, that in the case of clauses
(i) through (vi) or (ix), these permitted transferees must enter into a written agreement with the Company agreeing to be bound by the
transfer restrictions herein and the other restrictions contained in this Agreement (including provisions relating to voting, the Trust
Account and liquidating distributions).

9.	The Sponsor and each Insider represents and warrants that it, he or she has never been suspended or expelled from
membership in any securities or commodities exchange or association or had a securities
or commodities license or registration denied, suspended or revoked. Each Insider’s biographical information furnished to the Company and the Representative (including any such information included in the Prospectus) is true and accurate in
all respects and does not omit any material information with respect to the Insider’s background. The Sponsor and each Insider’s questionnaire furnished to the Company and the Representative is true and accurate in all respects. The Sponsor and each Insider represents and
warrants that: it, he or she is not subject to or a respondent in any legal action
for, any injunction, cease-and-desist order or order or stipulation to desist or refrain
from any act or practice relating to the offering of securities in any jurisdiction;
it, he or she has never been convicted of, or pleaded guilty to, any crime (i) involving
fraud, (ii) relating to any financial transaction or handling of funds of another
person, or (iii) pertaining to any dealings in any securities and it, he or she is
not currently a defendant in any such criminal proceeding.

10.	The Sponsor, the Consultant, each Insider and each Investor has full right and power, without violating any agreement to which it is bound (including,
without limitation, any non-competition or non-solicitation agreement with any employer
or former employer), to enter into this Letter Agreement and, with respect to the Insiders, as applicable, to serve as an officer and/or director on the board of directors of
the Company and hereby consents to being named in the Prospectus as an officer and/or
director of the Company.