SC 13G/A
PERCEPTIVE ADVISORS LLC filed this Form SC 13G/A on 01/11/2019
Entire Document

Item 1(a).

Name of Issuer:



La Jolla Pharmaceutical Company (the “Issuer”)


Item 1(b).

Address of Issuer’s Principal Executive Offices:



4550 Towne Centre Court, San Diego, California 92121


Item 2(a).

Names of Persons Filing:

The names of the persons filing this report (collectively, the “Reporting Persons”) are:



Perceptive Advisors LLC (“Perceptive Advisors”)



Joseph Edelman (“Mr. Edelman”)



Perceptive Life Sciences Master Fund, Ltd. (the “Master Fund”)


Item 2(b).

Address of Principal Business Office or, if None, Residence:

The address of the principal business office of each of the Reporting Persons is:



51 Astor Place, 10th Floor


New York, NY 10003


Item 2(c).




Perceptive Advisors is a Delaware limited liability company



Mr. Edelman is a United States citizen



The Master Fund is a Cayman Islands corporation


Item 2(d).

Title of Class of Securities:



Common Stock, Par Value $0.0001 per share (“Common Stock”)


Item 2(e).

CUSIP Number:



503459 60 4


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:



Not applicable.


Item 4.




The information required by this item with respect to each Reporting Person is set forth in Rows 5 through 9 and 11 of the cover page to this Schedule 13G. The ownership percentages reported are based on 26,233,631 outstanding shares of Common Stock, as reported in the Issuer’s Form 10-Q filed on October 24, 2018.



The Master Fund directly holds 2,253,376 shares of Common Stock as of January 8, 2019. As of December 31, 2018, the Master fund directly held 4,313,611 shares of Common Stock. Perceptive Advisors serves as the investment manager to the Master Fund and may be deemed to beneficially own the securities directly held by the Master Fund. Mr. Edelman is the managing member of Perceptive Advisors and may be deemed to beneficially own the securities directly held by the Master Fund.

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