Filing Details

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

£ Rule 13d-1(b)

x Rule 13d-1(c)

£ Rule 13d-1(d)

^*The remainder of this cover page shall be filled out for a reporting persons 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).

1

NAMES OF REPORTING PERSONS

CALM WATERS PARTNERSHIP

2

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

(a) ☐

(b) ☐ 

3

SEC USE ONLY

4

CITIZENSHIP OR PLACE OF ORGANIZATION

WISCONSIN

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH

5

SOLE VOTING POWER
0

6

SHARED VOTING POWER
930,642

7

SOLE DISPOSITIVE POWER
0

8

SHARED DISPOSITIVE POWER
930,642

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
930,642

10

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES 
CERTAIN SHARES ☐

11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
6.4%

12

TYPE OF REPORTING PERSON
PN

1

NAMES OF REPORTING PERSONS

RICHARD S. STRONG

2

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

(a) ☐

(b) ☐

3

SEC USE ONLY

4

CITIZENSHIP OR PLACE OF ORGANIZATION

U.S.A.

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH

5

SOLE VOTING POWER
387,500

6

SHARED VOTING POWER
930,642

7

SOLE DISPOSITIVE POWER
387,500

8

SHARED DISPOSITIVE POWER
930,642

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,318,142

10

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES 
CERTAIN SHARES ☐

11

9.1%

12

TYPE OF REPORTING PERSON
IN

Item 1.

(a)

Name of Issuer:

Rosehill Resources Inc.

(b)

Address of Issuers Principal Executive Offices:

16200 Park Row, Suite 300

Houston, Texas 77084

Item 2.

(a)

Name of Persons Filing:

Calm Waters Partnership

Richard S. Strong

(b)

Address of Principal Business Office:

All reporting persons may be contacted at:

c/o Godfrey & Kahn, S.C.

833 East Michigan Street, Suite 1800

Milwaukee, WI 53202

(c)

Citizenship:

Calm Waters Partnership is a Wisconsin general partnership.

Richard S. Strong is a United States citizen.

(d)

Title of Class of Securities:

Class A Common Stock, Par Value $0.0001 per Share

(e)

CUSIP Number:

777385105

Item 3.

If this statement is filed pursuant to Rule 13d-1(b), or 13d-2(b) or (c), check whether the person filing is a(n):

Not applicable.

Item 4.

Ownership

(a)

Amount beneficially owned:

See responses to Item 9 of the cover pages.

(b)

Percent of Class:

See responses to Item 11 of the cover pages.

(c)

For information on voting and dispositive power with respect to the above listed shares, see Items 5-9 on the Cover Pages.

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:   £

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.

Certification.

By signing below, I certify that, to the best of my knowledge and belief, the securities referred to above 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, other than activities solely in connection with a nomination under §240.14a-11.

CALM WATERS PARTNERSHIP

By:  /s/ Richard S. Strong

By: /s/ Richard S. Strong

Richard S. Strong

Richard S. Strong

Managing Partner

Exhibit

Description

1

Joint Filing Agreement (incorporated by reference to Exhibit 1 of the Reporting Persons Schedule 13G filed with the SEC on October 5, 2018)