UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G

Under the Securities Exchange Act of 1934


MIMEDX GROUP, INC.
(Name of Issuer)
COMMON STOCK
(Title of Class of Securities)
602496101
(CUSIP Number)
DECEMBER 31, 2018
(Date of Event which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to
which this Schedule is filed:

	[X]  Rule 13d-1(b)

	[_]  Rule 13d-1(c)

	[_]  Rule 13d-1(d)

The remainder of this cover page shall be filled out
for a reporting person's initial filing on this form with
respect to the subject class of securities, and for any
subsequent amendment containing information which
would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover
page shall not be deemed to be "filed" for the purpose
of Section 18 of the Securities Exchange Act of 1934
("Act") or otherwise subject to the liabilities of that
section of the Act but shall be subject to all other
provisions of the Act (however, see the Notes).


SCHEDULE 13G
CUSIP No.	602496101

1	Names of Reporting Persons
	GROUP ONE TRADING, LP
2	Check the appropriate box if a member of a Group (see instructions)
	(a)  [  ]
	(b)  [X]
3	Sec Use Only

4	Citizenship or Place of Organization
	CALIFORNIA, USA
Number of Shares Beneficially Owned by Each Reporting Person With:
	5	Sole Voting Power
		6,379,103
	6	Shared Voting Power
		0
	7	Sole Dispositive Power
		6,379,103
	8	Shared Dispositive Power
		0
9	Aggregate Amount Beneficially Owned by Each Reporting Person
	6,379,103
10	Check box if the aggregate amount in row (9) excludes certain shares
	[ ]
11	Percent of class represented by amount in row (9)
	5.7%
12	Type of Reporting Person (See Instructions)
	BD


Item 1.
(a)	Name of Issuer:
MIMEDX GROUP, INC.
(b)	Address of Issuer's Principal Executive Offices:
1775 WEST OAK COMMONS CT. NE
MARIETTA, GA 30062

Item 2.
(a)	Name of Person Filing:
GROUP ONE TRADING, LP
(b)	Address of Principal Business Office or, if None, Residence:
440 SOUTH LASALLE, STE. 3232
CHICAGO, IL 60605
(c)	Citizenship:
CALIFORNIA, USA
(d)	Title and Class of Securities:
COMMON STOCK
(e)	CUSIP No.:

Item 3. 	If this statement is filed pursuant to 240.13d-1(b) or
		240.13d-2(b) or (c), check whether the person filing is a:
(a)	[X]	Broker or dealer registered under Section 15 of the Act;
(b)	[_]	Bank as defined in Section 3(a)(6) of the Act;
(c)	[_]	Insurance company as defined in Section 3(a)(19) of the Act;
(d)	[_]	Investment company registered under Section 8
		of the Investment Company Act of 1940;
(e)	[_]	An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E);
(f)	[_]	An employee benefit plan or endowment fund
		in accordance with Rule 13d-1(b)(1)(ii)(F);
(g)	[_]	A parent holding company or control person in
		accordance with Rule 13d-1(b)(1)(ii)(G);
(h)	[_]	A savings associations as defined in Section 3(b)
		of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	[_]	A church plan that is excluded from the definition of
		an investment company under section 3(c)(14) of the
		Investment Company Act of 1940;
(j)	[_]	A non-U.S. institution in accordance with Rule 240.13d-1(b)(1)(ii)(J);
(k)	[_]	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K). If filing
		as a non-U.S. institution in accordance with
		Rule 240.13d-1(b)(1)(ii)(J), please specify the type of institution:

Item 4.	Ownership
(a)	Amount Beneficially Owned:
	6,379,103
 (b)	Percent of Class:
	5.7%
 (c)	Number of shares as to which such person has:
	(i)	Sole power to vote or to direct the vote:
		6,379,103
(ii)	Shared power to vote or to direct the vote:
		0
(iii)	Sole power to dispose or to direct the disposition of:
		6,379,103
(iv)	Shared power to dispose or to direct the disposition of:
		0

Item 5.	Ownership of Five Percent or Less of a Class.
	If this statement is being filed to report the fact that
	as of the date hereof the reporting person has ceased to be
	the beneficial owner of more than five percent of the class
	of securities, check the following [  X  ].

Item 6.	Ownership of more than Five Percent on Behalf of Another Person.
	NOT APPLICABLE

Item 7.	Identification and classification of the subsidiary
	which acquired the security being reported on by the parent
	holding company or control person.
	NOT APPLICABLE

Item 8.	Identification and classification of members of the group.
	NOT APPLICABLE

Item 9.	Notice of Dissolution of Group.
	NOT APPLICABLE

Item 10.	Certifications.

BY SIGNING BELOW, I CERTIFY THAT, TO THE BEST OF MY KNOWLEDGE AND BELIEF,
THE SECURITIES REFERRED TO ABOVE WERE ACQUIRED BY AND ARE HELD IN THE
ORDINARY COURSE OF BUSINESS AND WERE NOT ACQUIRED AND ARE NOT HELD FOR
THE PURPOSE OF OR WITH THE EFFECT OF CHANGING OR INFLUENCING THE CONTROL
OF THE ISSUER OF THE SECURITIES AND WERE NOT ACQUIRED AND ARE NOT HELD
IN CONNECTION WITH OR AS A PARTICIPANT IN ANY TRANSACTION HAVING THAT
PURPOSE OR EFFECT.

SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief,
I certify that the information set forth in this statement is true,
complete and correct.
Dated:  January 31, 2019

Group One Trading, LP

/s/ Kyle Tondo-Kramer
Name: Kyle Tondo-Kramer
Title: Chief Compliance Officer

The original statement shall be signed by each person on whose
behalf the statement is filed or his authorized representative.
If the statement is signed on behalf of a person by his authorized
representative (other than an executive officer or general partner of
this filing person), evidence of the representative's authority to sign
on behalf of such person shall be filed with the statement, provided,
however, that a power of attorney for this purpose which is already on
file with the Commission may be incorporated by reference.  The name and
any title of each person who signs the statement shall be typed or printed
beneath his signature.

Attention:  Intentional misstatements or omissions of fact constitute
Federal criminal violations (See 18 U.S.C. 1001).