13G Filing: Blue Mountain Capital and Avista Healthcare Public Acquisiton Corp (AHPA)

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CUSIP No. G0726L109		13G		Page 5 of 6 Pages

(d)

☐ Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).

(e)

☐ An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E);

(f)

☐ An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);

(g)

☐ A parent holding company or control person in accordance with §240.13d-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 (15 U.S.C. 80a-3);

(j)

☐ Group, in accordance with §240.13d-1(b)(1)(ii)(K).

Item 4. Ownership.

The information required by
Items 4(a)-(c) is set forth in Rows 5-11 of each Cover Page and is incorporated herein by reference.

BMCM
expressly declares that this filing shall not be construed as an admission that it is, for the purposes of Sections 13(d) or 13(g) of the Act, the beneficial owner of the securities owned by the BlueMountain Funds.

Item 5. Ownership of 5 Percent or Less of a Class.

This Amendment constitutes an exit filing for BMCA.

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 5 percent of the class of securities, check the following  ☐.

Item 6. Ownership of More than 5 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.