SEC Filing Document

Company: DUKE Robotics Corp.
Ticker: DUKR
CIK: 1638911
Filing Type: S-1
Document Type: EX-4.2
Date Filed: 2026-04-01
Accession Number: 0001213900-26-037765
Exchange: OTC
SIC Code: 3721
SIC Description: Aircraft
URL: https://www.sec.gov/Archives/edgar/data/1638911/000121390026037765/ea028409601ex4-2.htm

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of the Board of Directors, in the best interests of the Company to disclose and is not, in the opinion of the Company’s counsel, otherwise required to be disclosed, then the Company shall have the right to defer such filing for the period during which such registration would be seriously detrimental under clause (i) or would require such disclosure under clause (ii); provided, however, that (x) the Company may not defer such filing for a period of more than 90 days after receipt of any demand by the Holders and (y) the Company shall not exercise its right to defer a Demand Registration more than once in any 12-month period. The Company shall give written notice of its determination to the Holders to defer the filing and of the fact that the purpose for such deferral no longer exists, in each case, promptly after the occurrence thereof. (b) Piggy-Back Registration.

i. Piggy-Back Rights. If at any
time during the five year period from the date of effectiveness of the Registration Statement, and the Registration Statement is no longer
effective, the Company proposes to file a registration statement under the Securities Act with respect to an offering of equity securities,
or securities or other obligations exercisable or exchangeable for, or convertible into, equity securities, by the Company for its own
account or for shareholders of the Company for their account (or by the Company and by shareholders of the Company including, without
limitation, pursuant to Section 5(a)), other than a registration statement (i) filed in connection with any employee share option or other
benefit plan, (ii) for an exchange offer or offering of securities solely to the Company’s existing shareholders, or (iii) for a
dividend reinvestment plan, then the Company shall (x) give written notice of such proposed filing to the holders of Registrable Securities
as soon as practicable but in no event less than ten days before the anticipated filing date, which notice shall describe the amount and
type of securities to be included in such offering, the intended method(s) of distribution, and the name of the proposed managing underwriter
or underwriters, if any, of the offering, and (y) offer to the holders of Registrable Securities in such notice the opportunity to register
the sale of such number of Warrant Shares held by such holder (the “Piggy-Back Registrable Securities”), as such holders
may request in writing within five days following receipt of such notice (a “Piggy-Back Registration”). The Company
shall cause such Piggy-Back Registrable Securities to be included in such registration and shall use its commercially reasonable efforts
to cause the managing underwriter or underwriters of a proposed underwritten offering to permit the Piggy-Back Registrable Securities
requested to be included in a Piggy-Back Registration on the same terms and conditions as any similar securities of the Company and to
permit the sale or other disposition of such Piggy-Back Registrable Securities in accordance with the intended method(s) of distribution
thereof. All holders of Piggy-Back Registrable Securities proposing to distribute their securities through a Piggy-Back Registration that
involves an underwriter or underwriters shall enter into an underwriting agreement in customary form with the underwriter or underwriters
selected for such Piggy-Back Registration.

ii. Reduction of Offering. If the
managing underwriter or underwriters for a Piggy-Back Registration that is to be an underwritten offering advises the Company and the
holders of Registrable Securities in writing that the dollar amount or number of shares of Common Stock which the Company desires to sell,
taken together with shares of Common Stock, if any, as to which registration has been requested pursuant to written contractual arrangements
with persons other than the holders of Piggy-Back Registrable Securities hereunder, the Piggy-Back Registrable Securities as to which
registration has been requested under this Section 5(b), and the shares of Common Stock, if any, as to which registration has been requested
pursuant to the written contractual piggy-back registration rights of other shareholders of the Company, exceeds the maximum dollar amount
or maximum number of shares that can be sold in such offering without adversely affecting the proposed offering price, the timing, the
distribution method, or the probability of success of such offering (such maximum dollar amount or maximum number of shares, as applicable,
the “Maximum Number of Shares”), then the Company shall include in any such registration:

(x) If the registration is undertaken
for the Company’s account: (A) first, the Common Stock or other securities that the Company desires to sell that can be sold without
exceeding the Maximum Number of Shares; and (B) second, subject to the requirements of registration rights granted by the Company prior
to the date hereof, to the extent that the Maximum Number of Shares has not been reached under the foregoing clause (A), up to the amount
of shares of Common Stock or other securities that can be sold without exceeding the Maximum Number of Shares, on a pro rata basis, from
(i) Piggy-Back Registrable Securities as to which registration has been requested and (ii) the Common Stock or other securities for the
account of other persons that the Company is obligated to register pursuant to written contractual piggy-back registration rights with
such persons;

(y) If the registration is a Demand Registration
undertaken at the demand of holders of Registrable Securities, subject to the requirements of registration rights granted by the Company
prior to the date hereof, (A) first, the shares of Common Stock or other securities for the account of the demanding persons that can
be sold without exceeding the Maximum Number of Shares; (B) second, to the extent that the Maximum Number of Shares has not been reached
under the foregoing clause (A), the shares of Common Stock or other securities comprised of Piggy-Back Registrable Securities, pro rata,
as to which registration has been requested pursuant to the terms hereof that can be sold without exceeding the Maximum Number of Shares;
and (C) third, to the extent that the Maximum Number of Shares has not been reached under the foregoing clauses (A) and (B), the shares
of Common Stock or other securities for the account of other persons that the Company is obligated to register pursuant to written contractual
arrangements with such persons, that can be sold without exceeding the Maximum Number of Shares.

iii. Withdrawal. Any holder of
Piggy-Back Registrable Securities may elect to withdraw such holder’s request for inclusion of such Piggy-Back Registrable Securities
in any Piggy-Back Registration by giving written notice to the Company of such request to withdraw prior to the effectiveness of the registration
statement. The Company (whether on its own determination or as the result of a withdrawal by persons making a demand pursuant to written
contractual obligations) may withdraw a registration statement at any time prior to the effectiveness of the registration statement. Notwithstanding
any such withdrawal, the Company shall pay all expenses incurred by the holders of Piggy-Back Registrable Securities in connection with
such Piggy-Back Registration as provided in Section 5(b)(iv).

iv. Terms. The Company shall bear
all fees and expenses attendant to registering the Piggy-Back Registrable Securities, including the expenses of one legal counsel selected
by the Holders to represent them in connection with the sale of the Piggy-Back Registrable Securities but the Holders shall pay any and
all underwriting commissions related to the Piggy-Back Registrable Securities. In the event of such a proposed registration, the Company
shall furnish the then Holders of outstanding Piggy-Back Registrable Securities with not less than fifteen days written notice prior to
the proposed date of filing of such registration statement. Such notice to the Holders shall continue to be given for each applicable
registration statement filed (during the period in which the Warrant is exercisable) by the Company until such time as all of the Piggy-Back
Registrable Securities have been registered and sold. The Holders of the Piggy-Back Registrable Securities shall exercise the “piggy-back”
rights provided for herein by giving written notice, within ten days of the receipt of the Company’s notice of its intention to
file a registration statement. The Company shall cause any registration statement filed pursuant to the above “piggyback”
rights to remain effective for at least nine (9) months from the date that the Holders of the Piggy-Back Registrable Securities are first
given the opportunity to sell all of such securities.

(c) General
Terms. These additional terms shall relate to registration under Sections 5(a) above:

i. Indemnification.