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Insider Trading: Nxstage Medical, Inc.

Monthly summaries of insider trading activities (stock purchases, sales, and option exercises) reported by insiders of Nxstage Medical, Inc. in the last 24 months are illustrated in figures 1 and 2. Table 1 shows the monthly insider trading data of Nxstage Medical, Inc. since year 2005. Table 2 shows the detailed insider transactions of Nxstage Medical, Inc. since 2005. The reporting company's ticker symbol is NXTM. The reporting company's CIK number is 1333170.

The total value of stock buying since 2005 is $43,308,597. The total value of stock sales is $646,073. The total value of stock exercises is $11,902.


1 year stock price chart,   1 day stock price chart
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Figure 1. Monthly insider transaction values at Nxstage Medical, Inc. (NXTM) in the past 24 months. The trade values of insider stock buys, sales, and option exercises are in logarithmic scale as shown on the right axis labels. The detailed monthly and daily insider transactions are listed in the 2 tables below.

  • 09

  • 10

  • 11

  • 12

  • 01 2007

  • 02

  • 03

  • 04

  • 05

  • 06

  • 07

  • 08

  • 09

  • 10

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  • 12

  • 01 2008

  • 02

  • 03

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  • 05

  • 06

  • 07

  • 08

  • $25,000k

    $2,500k

    $250k

    $25k

  • Buy
  • Sale
  • Option Exercise

Figure 2. Average prices of insider buys, sales, and option exercises at Nxstage Medical, Inc. (NXTM) in the past 24 months. See table 2 for insider transaction details.

  • 09

  • 10

  • 11

  • 12

  • 01 2007

  • 02

  • 03

  • 04

  • 05

  • 06

  • 07

  • 08

  • 09

  • 10

  • 11

  • 12

  • 01 2008

  • 02

  • 03

  • 04

  • 05

  • 06

  • 07

  • 08

  • $4.50

    $3.38

    $2.25

    $1.12



Table 1. Monthly summaries of insider stock purchases, sales, and option exercises for Nxstage Medical, Inc. (NXTM).
Trading Period
year-month  
Insider Buying     
Shares               Value ($)
Insider Sales     
Shares               Value ($)
Option Exercises     
Shares               Value ($)
2008-08 1,194,922 5,188,995 32,170 121,671 32,170 11,902
2008-05 5,555,556 25,000,002 0 0 0 0
2006-06 700,000 6,125,000 54,711 449,997 0 0
2006-05 0 0 6,795 74,405 0 0
2005-10 699,460 6,994,600 0 0 0 0

Table 2. Detailed insider stock purchases, sales, and option exercises for Nxstage Medical, Inc. (NXTM)
  Trade Date   Insider Name Trade Type     Shares       Price ($)   Value ($)
2008-08-26 Isaly Samuel D (Director) Purchase 27,700 3.50 97,052
2008-08-25 Isaly Samuel D (Director) Purchase 108,900 3.37 367,112
2008-08-21 Isaly Samuel D (Director) Purchase 26,100 3.25 84,832
2008-08-21 Phildius Peter P (Director) Sale 13,570 3.28 44,510
2008-08-13 Phildius Peter P (Director) Sale 6,500 4.03 26,208
2008-08-12 Moore Craig W (Director) Purchase 10,000 4.00 40,000
2008-08-11 Phildius Peter P (Director) Sale 12,100 4.21 50,953
2008-08-11 Phildius Peter P (Director) Option Exercise 32,170 .37 11,902
2008-08-01 Credit Suisse/ (10% Owner) Purchase 1,022,222 4.50 4,599,999
2008-05-23 Isaly Samuel D (Director) Purchase 5,555,556 4.50 25,000,002
2006-06-09 Chambon Philippe (Director) Purchase 350,000 8.75 3,062,500
2006-06-09 Credit Suisse/ (10% Owner) Purchase 350,000 8.75 3,062,500
2006-06-08 Burbank Jeffrey H (President & CEO) Sale 54,711 8.22 449,997
2006-05-26 Atlas Venture Associates Iii L P (10% Owner) Sale 6,795 10.95 74,405
2005-10-27 Utterberg David S (Director) Purchase 73,789 10.00 737,890
2005-10-27 Chambon Philippe (Director) Purchase 187,035 10.00 1,870,350
2005-10-27 Reid Perper (Director) Purchase 51,755 10.00 517,550
2005-10-27 Atlas Venture Associates V Lp (10% Owner) Purchase 99,923 10.00 999,230
2005-10-27 Formela Jean Francois Purchase 99,923 10.00 999,230
2005-10-27 Credit Suisse First Boston/ (Other) Purchase 187,035 10.00 1,870,350

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above tables cannot be completely guaranteed as to their accuracy. For more insider trading information of Nxstage Medical, Inc. (symbol NXTM, CIK number 1333170) see the Securities and Exchange Commission (SEC) website.

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