Document:

Exhibit 4.1

ZQ|CERT#|COY|CLS|RGSTRY|ACCT#|TRANSTYPE|RUN#|TRANS#
PO BOX 43004, Providence, RI 02940-3004 MR A SAMPLE DESIGNATION (IF ANY) ADD 1 ADD 2 ADD 3 ADD 4 CUSIP XXXXXX XX X Holder ID XXXXXXXXXX
Insurance Value 1,000,000.00 Number of Shares 123456 DTC 12345678 123456789012345 Certificate Numbers Num/No. Denom. Total 1234567890/1234567890
1 1 1 1234567890/1234567890 2 2 2 1234567890/1234567890 3 3 3 1234567890/1234567890 4 4 4 1234567890/1234567890 5 5 5 1234567890/1234567890
6 6 6 Total Transaction 7 COMMON STOCK COMMON STOCK PAR VALUE $0.00025 Certificate Number ZQ00000000 Shares **00 0000******************
***000 000***************** ****000 000**************** *****0 00000*************** ******0 00000************** ORTHOPEDIATRICS
CORP. INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE THIS CERTIFIES THAT MR.SAMPLE & MRS SAMPLE & MR.SAMPLE &
MRS SAMPLE ** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David
Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David
Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David
Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David
Sample **** Mr. Alexander David Sample **** Mr. Alexander . David Sample **** Mr. Alexander David Sample **** Mr. Alexander David
Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr Alexander David Sample **** Mr. Alexander David
Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David
Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David
Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander. David Sample **** Mr. Alexander David
Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David
Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David
Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David
Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David
Sample **** Mr. Sample **** Mr. Sample SEE REVERSE FOR CERTAIN DEFINITIONS CUSIP 68752L 10 0 is the owner of **ZERO HUNDRED THOUSAND
ZERO HUNDRED AND ZERO *** **000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares***
*000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****
000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****0
00000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****00
0000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000
000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****0000
00**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****00000
0**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000
**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000*
*Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**
Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**S
THIS CERTIFICATE IS TRANSFERABLE IN CITIES DESIGNATED BY THE TRANSFER AGENT, AVAILABLE ONLINE AT www.computershare.com FULLY-PAID
AND NON-ASSESSABLE SHARES OF COMMON STOCK OF OrthoPediatrics Corp. (hereinafter called the “Company”), transferable
on the books of the Company in person or by duly authorized attorney, upon surrender of this Certificate properly endorsed. This
Certificate and the shares represented hereby, are issued and shall be held subject to all of the provisions of the Articles of
Incorporation, as amended, and the By-Laws, as amended, of the Company (copies of which are on file with the Company and with
the Transfer Agent), to all of which each holder, by acceptance hereof, assents. This Certificate is not valid unless countersigned
and registered by the Transfer Agent and Registrar. Witness the facsimile seal of the Company and the facsimile signatures of
its duly authorized officers. FACSIMILE SIGNATURE TO COME President DATED DD-MMM-YYYY COUNTERSIGNED AND REGISTERED: COMPUTERSHARE
TRUST COMPANY, N.A. TRANSFER3AGENT AND REGISTRAR, FACSIMILE SIGNATURE TO COME Secretary By AUTHORIZED SIGNATURE SECURITY INSTRUCTIONS
ON REVERSE

     

     

    

ORTHOPEDIATRICS
CORP. THE COMPANY WILL FURNISH WITHOUT CHARGE TO EACH SHAREHOLDER WHO SO REQUESTS, A SUMMARY OF THE POWERS, DESIGNATIONS, PREFERENCES
AND RELATIVE, PARTICIPATING, OPTIONAL OR OTHER SPECIAL RIGHTS OF EACH CLASS OF STOCK OF THE COMPANY AND THE QUALIFICATIONS, LIMITATIONS
OR RESTRICTIONS OF SUCH PREFERENCES AND RIGHTS, AND THE VARIATIONS IN RIGHTS, PREFERENCES AND LIMITATIONS DETERMINED FOR EACH
SERIES, WHICH ARE FIXED BY THE ARTICLES OF INCORPORATION OF THE COMPANY, AS AMENDED, AND THE RESOLUTIONS OF THE BOARD OF DIRECTORS
OF THE COMPANY, AND THE AUTHORITY OF THE BOARD OF DIRECTORS TO DETERMINE VARIATIONS FOR FUTURE SERIES. SUCH REQUEST MAY BE MADE
TO THE OFFICE OF THE SECRETARY OF THE COMPANY OR TO THE TRANSFER AGENT. THE BOARD OF DIRECTORS MAY REQUIRE THE OWNER OF A LOST
OR DESTROYED STOCK CERTIFICATE, OR HIS LEGAL REPRESENTATIVES, TO GIVE THE COMPANY A BOND TO INDEMNIFY IT AND ITS TRANSFER AGENTS
AND REGISTRARS AGAINST ANY CLAIM THAT MAY BE MADE AGAINST THEM ON ACCOUNT OF THE ALLEGED LOSS OR DESTRUCTION OF ANY SUCH CERTIFICATE.
The following abbreviations, when used in the inscription on the face of this certificate, shall be construed as though they were
written out in full according to applicable laws or regulations: TEN COM - as tenants in common UNIF GIFT MIN ACT - Custodian
(Cust) (Minor) TEN ENT - as tenants by the entireties under Uniform Gifts to Minors Act (State) JT TEN - as joint tenants with
right of survivorship UNIF TRF MIN ACT - Custodian (until age) and not as tenants in common (Cust) under Uniform Transfers to
Minors Act (Minor) (State) Additional abbreviations may also be used though not in the above list. PLEASE INSERT SOCIAL SECURITY
OR OTHER IDENTIFYING NUMBER OF ASSIGNEE For value received, hereby sell, assign and transfer unto (PLEASE PRINT OR TYPEWRITE NAME
AND ADDRESS, INCLUDING POSTAL ZIP CODE, OF ASSIGNEE) Shares of the common stock represented by the within Certificate, and do
hereby irrevocably constitute and appoint Attorney to transfer the said stock on the books of the within-named Corporation with
full power of substitution in the premises. Dated: 20 Signature: Signature: Notice: The signature to this assignment must correspond
with the name as written upon the face of the certificate, in every particular, without alteration or enlargement, or any change
whatever. Signature(s) Guaranteed: Medallion Guarantee Stamp THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION
(Banks, Stockbrokers, Savings and Loan Associations and Credit Unions) WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION
PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15. The IRS requires that the named transfer agent (“we”) report the cost basis
of certain shares or units acquired after January 1, 2011. If your shares or units are covered by the legislation, and you requested
to sell or transfer the shares or units using a specific cost basis calculation method, then we have processed as you requested.
If you did not specify a cost basis calculation method, then we have defaulted to the first in, first out (FIFO) method. Please
consult your tax advisor if you need additional information about cost basis. If you do not keep in contact with the issuer or
do not have any activity in your account for the time period specified by state law, your property may become subject to state
unclaimed property laws and transferred to the appropriate state.Exhibit 4.3

 

FIRST AMENDMENT TO

REGISTRATION RIGHTS AGREEMENT

OF

ORTHOPEDIATRICS CORP.

 

THIS FIRST AMENDMENT
to the Registration Rights Agreement (this “Amendment”), dated as of           , 2017, is entered into by and between
OrthoPediatrics Corp., a Delaware corporation (the “Company”), and Squadron Capital LLC, a Delaware limited
liability company (“Squadron”). Capitalized terms used but not defined herein shall have the meanings given
to such terms in the Registration Rights Agreement (as defined below).

 

WHEREAS, the Company,
Squadron and the additional parties listed on Schedule 1 thereof are parties to that certain Registration Rights Agreement, dated
as of May 30, 2014 (the “Registration Rights Agreement”);

 

WHEREAS, Section 7.8(b)
of the Registration Rights Agreement provides that the Registration Rights Agreement may be amended with the prior written consent
of the Company and Squadron; and

 

WHEREAS, the Company
and Squadron wish to amend the Registration Rights Agreement as provided herein, subject to, and effective upon, the closing of
the registered public offering of the Company’s Common Stock, par value $0.00025 per share, made pursuant to the Registration
Statement on Form S-1 (No. 333-212086) filed with the U.S. Securities and Exchange Commission on June 16, 2016, as amended (the
“IPO”).

 

NOW THEREFORE, in consideration
of the foregoing and other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, and intending
to be legally bound, the Company and Squadron agree as follows, such agreement subject to and effective upon the closing of the
IPO:

 

1.          Amendments
to Section 1.

 

(a) The definition
of “Qualified IPO” shall be deleted in its entirety.

 

(b) The definition
of “Registrable Securities” in Section 1 of the Registration Rights Agreement is hereby amended and restated in its
entirety to read as follows:

 

“Registrable
Securities” means (i) any Common Stock issued or issuable upon conversion of the Series B Preferred Stock issued to Squadron
and the Holders pursuant to the Purchase Agreement or issued or issuable to Squadron upon conversion, exchange or in consideration
of all or a portion of the Company’s debt held by Squadron; (ii) any Common Stock issued or issuable upon conversion of the
Series A Preferred Stock; (iii) any Common Stock issued or issuable with respect to the Series A Preferred Stock, in lieu of the
cash payment of the Original Issue Price (as defined in the Amended and Restated Certificate of Designations, Preferences and Rights
of Preferred Stock of the Company, as amended, in effect immediately prior to the IPO (the “Certificate of Designations”))
thereof pursuant to Section 5.2 of the Certificate of Designations; (iii) any Common Stock issued or issuable with respect to the
Series A Preferred Stock, in lieu of the cash payment of the Accruing Dividends (as defined in the Certificate of Designations)
accrued but unpaid thereon, whether or not declared, together with any other dividends declared but unpaid thereon, pursuant to
Section 5.2 of the Certificate of Designations; (iv) any Common Stock issued or issuable, directly or indirectly, upon conversion
and/or exercise of any other securities of the Company, acquired by Squadron or the other Holders after the date of the Agreement;
and (v) any Common Stock issued as (or issuable upon the conversion or exercise of any warrant, right or other security that is
issued as) a dividend or other distribution with respect to, or in exchange for or in replacement of, the shares referenced in
clauses (i), (ii), (iii) and (iv) above.”

 

     

     

    

 

2.          Amendment
to Section 2.4. The first sentence of Section 2.4(a) is hereby amended and restated to read as follows:

 

“The
Company will not be required to effect more than three registrations requested by Squadron pursuant to Section 2.1 above.”

 

3.          Amendment
to Section 5.3(a). Clause (i) of the first sentence of Section 5.3(a) is hereby amended and restated to read as follows:

 

“(i)
first, the maximum number of shares requested to be included by the Company in such registration that can be sold without exceeding
the Maximum Number of Shares; provided, however, that such number of shares to be included by the Company in such registration
shall be reduced by up to 40% in order to permit Squadron to sell up to 40% of the Maximum Number of Shares in such registration,
if Squadron so requests;”

 

4.          No
Further Effect. Except as amended hereby, all terms and provisions of the Registration Rights Agreement shall remain in full
force and effect, and are hereby ratified and confirmed by the Company and Squadron. All references in the Registration Rights
Agreement to “this Agreement,” “herein,” “hereof,” “hereby” and words of similar
import shall refer to the Registration Rights Agreement, as amended hereby. In the event of any conflict between the provisions
of this Amendment and the Registration Rights Agreement, the provisions of this Amendment shall control.

 

5.          Counterparts.
This Amendment may be executed in any number of counterparts, each of which will be deemed an original, but all of which together
will constitute but one and the same instrument. A signature delivered by facsimile, pdf, electronic mail or other electronic means
shall be considered due execution and shall be binding upon the signatory thereto with the same force and effect as if the signature
were an original. No party hereto or to any such agreement or instrument shall raise the use of facsimile machine, pdf, electronic
mail or other electronic means to deliver a signature or the fact that any signature or agreement or instrument was transmitted
or communicated through the use of a facsimile machine, pdf, electronic mail or other electronic means as a defense to the formation
or enforceability of a contract and each such party forever waives any such defense.

 

    	 	2	 

     

    

 

 

6.          Governing
Law. This Amendment shall be governed by and construed in accordance with the domestic substantive laws of the State of Delaware,
without giving effect to any choice or conflict of law provision or rule that would cause the application of the laws of any other
jurisdiction.

 

[Signature Page Follows] 

 

    	 	3	 

     

    

 

IN WITNESS WHEREOF, the parties hereto have
executed this First Amendment to Registration Rights Agreement as of the date first written above.

 

	 	ORTHOPEDIATRICS CORP.
	 	 	 
	 	By:	 
	 	 	Name: Mark C. Throdahl
	 	 	Title:  President and Chief Executive Officer
	 	 	 
	 	SQUADRON CAPITAL LLC
	 	 
	 	By:	 
	 	 	Name: David R. Pelizzon
	 	 	Title:  President

 

[Signature Page to First Amendment to Registration Rights Agreement]

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