SecurityNXTM / NxStage Medical, Inc.
InstitutionFNY Partners Fund LP
Value $ 211,000

FNY Partners Fund LP reports 31.45% decrease in ownership of NXTM / NxStage Medical, Inc.

April 18, 2018 - FNY Partners Fund LP has filed a 13F-HR/A form disclosing ownership of 8,500 shares of NxStage Medical, Inc. (NASDAQ:NXTM) with total holdings valued at $211,000 USD as of March 31, 2018. FNY Partners Fund LP had filed a previous 13F-HR on January 24, 2018 disclosing 12,400 shares of NxStage Medical, Inc. at a value of $300,000 USD. This represents a change in shares of -31.45 percent and a change in value of -29.67 percent during the quarter.

Other investors with positions similar to FNY Partners Fund LP include ProShare Advisors LLC, Henderson Group Plc, First Republic Investment Management, Inc., Great West Life Assurance Co /can/, Millennium Management Llc, and Fny Investment Advisers, Llc.

NxStage Medical, Inc. has declared a standard industrial code (sic) of 3845 which is the "Electromedical and Electrotherapeutic Apparatus" industry. FNY Partners Fund LP's top industries are "Construction Special Trade Contractors" (sic 17), "Miscellaneous Manufacturing Industries" (sic 39), and "Furniture And Fixtures" (sic 25).

13F Filings

The Security, Class, and CUSIP columns in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names and cusips.

In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Form Security Class CUSIP Share
Shares Change
2018-03-31 13F-HR/A-1 NXSTAGE MEDICAL ORD COM 67072V103 24.51 8,500 -31.45 211 -29.67 -96 7 2.19
2018-03-31 13F-HR NXSTAGE MEDICAL ORD COM 67072V103 8,500 211
2017-12-31 13F-HR NXSTAGE MEDICAL ORD COM 67072V103 12,400 300

CUSIP: 67072V103