13G Filing: James E. Flynn and Marinus Pharmaceuticals Inc (MRNS)

Item 4.

Ownership.

Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.

(a)

Amount beneficially owned**:

Deerfield
Mgmt, L.P. – 2,238,587 shares

Deerfield Management Company, L.P. – 2,238,587 shares

Deerfield Special Situations Fund, L.P. – 2,238,587
shares

James E. Flynn – 2,238,587 shares

(b)

Percent of class**:

Deerfield
Mgmt, L.P. – 9.98%

Deerfield Management Company, L.P. – 9.98%

Deerfield Special Situations Fund, L.P. –
9.98%

James E. Flynn – 9.98%

(c)

Number of shares as to which such person has**:

(i)

Sole power to vote or to direct the vote:

All Reporting Persons 0

(ii)

Shared power to vote or to direct the vote:

Deerfield Mgmt, L.P. – 2,238,587

Deerfield Management Company, L.P. – 2,238,587

Deerfield Special Situations Fund, L.P. – 2,238,587

James E. Flynn – 2,238,587

(iii)

Sole power to dispose or to direct the disposition of:

All Reporting Persons – 0

(iv)

Shared power to dispose or to direct the disposition
of:

Deerfield Mgmt, L.P. – 2,238,587

Deerfield Management Company, L.P. – 2,238,587

Deerfield Special Situations Fund, L.P. – 2,238,587

James E. Flynn – 2,238,587


(j)	☐	A non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J);

(k)	☐	Group, in accordance with Rule 13d-1(b)(1)(ii)(K).

Page 7 of 13 – SEC Filing