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Insider Trading: Gulfmark Offshore Inc

Monthly summaries of insider trading activities (stock purchases, sales, and option exercises) reported by insiders of Gulfmark Offshore Inc in the last 24 months are illustrated in figures 1 and 2. Table 1 shows the monthly insider trading data of Gulfmark Offshore Inc since year 2005. Table 2 shows the detailed insider transactions of Gulfmark Offshore Inc since 2005. The reporting company's ticker symbol is GLF. The reporting company's CIK number is 1030749.

The total value of stock buying since 2005 is $309,744. The total value of stock sales is $11,057,990. The total value of stock exercises is $4,114,516.


1 year stock price chart,   1 day stock price chart
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Figure 1. Monthly insider transaction values at Gulfmark Offshore Inc (GLF) 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.

  • 01 2007

  • 02

  • 03

  • 04

  • 05

  • 06

  • 07

  • 08

  • 09

  • 10

  • 11

  • 12

  • 01 2008

  • 02

  • 03

  • 04

  • 05

  • 06

  • 07

  • 08

  • 09

  • 10

  • 11

  • 12

  • $2,713k

    $271k

    $27k

    $2k

  • Buy
  • Sale
  • Option Exercise

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

  • 01 2007

  • 02

  • 03

  • 04

  • 05

  • 06

  • 07

  • 08

  • 09

  • 10

  • 11

  • 12

  • 01 2008

  • 02

  • 03

  • 04

  • 05

  • 06

  • 07

  • 08

  • 09

  • 10

  • 11

  • 12

  • $66.38

    $49.78

    $33.19

    $16.59



Table 1. Monthly summaries of insider stock purchases, sales, and option exercises for Gulfmark Offshore Inc (GLF).
Trading Period
year-month  
Insider Buying     
Shares               Value ($)
Insider Sales     
Shares               Value ($)
Option Exercises     
Shares               Value ($)
2008-12 11,000 228,880 0 0 0 0
2008-09 0 0 50,000 2,198,405 217 8,276
2008-06 0 0 41,314 2,713,757 57 2,704
2008-05 0 0 31,310 1,887,391 84,000 1,370,250
2008-03 0 0 5,796 305,759 1,902 75,012
2008-01 0 0 3,555 144,403 0 0
2007-12 0 0 0 0 10,000 162,700
2007-07 100 5,515 0 0 0 0
2007-06 0 0 734 37,712 461 18,232
2007-05 0 0 2,847 142,690 0 0
2007-04 0 0 29,216 1,362,179 84,000 577,500
2007-03 52 2,072 16,179 705,271 11,817 141,726
2006-11 0 0 1,524 55,519 0 0
2006-07 2,352 63,245 0 0 19,656 78,002
2006-06 400 10,032 2,752 70,548 857 18,811
2006-03 0 0 5,000 135,900 100,655 319,967
2006-01 0 0 0 0 49,138 131,886
2005-12 0 0 0 0 150,000 1,209,450
2005-11 0 0 400 13,336 0 0
2005-08 0 0 1,155 34,120 0 0
2005-06 0 0 40,000 998,000 0 0
2005-05 0 0 10,000 253,000 0 0

Table 2. Detailed insider stock purchases, sales, and option exercises for Gulfmark Offshore Inc (GLF)
  Trade Date   Insider Name Trade Type     Shares       Price ($)   Value ($)
2008-12-24 Ross Rex (Director) Purchase 1,000 20.78 20,780
2008-12-24 Butters David J (Director) Purchase 10,000 20.81 208,100
2008-09-30 Kneen Quintin (VP - Finance) Option Exercise 217 38.14 8,276
2008-09-29 Millard Robert B (Director) Sale 40,100 42.97 1,723,205
2008-09-26 Millard Robert B (Director) Sale 9,900 48.00 475,200
2008-06-30 Kneen Quintin (VP - Finance) Option Exercise 57 47.45 2,704
2008-06-20 Guthrie Edward A (Exec. VP & CFO) Sale 600 67.00 40,200
2008-06-19 Guthrie Edward A (Exec. VP & CFO) Sale 9,400 67.00 629,800
2008-06-17 Crowe Marshall A (Director) Sale 2,500 66.00 165,000
2008-06-15 Mashinski Carla S (VP Acct & Chief Acct Officer) Sale 972 64.67 62,859
2008-06-13 Crowe Marshall A (Director) Sale 2,500 66.04 165,100
2008-06-13 Streeter Bruce A (President & CEO) Sale 20,000 64.58 1,291,636
2008-06-09 Mashinski Carla S (VP Acct & Chief Acct Officer) Sale 850 67.59 57,451
2008-06-05 Mashinski Carla S (VP Acct & Chief Acct Officer) Sale 478 67.39 32,212
2008-06-02 Leech John E (Exec. VP - Operations) Sale 4,014 67.14 269,499
2008-05-30 Mashinski Carla S (VP Acct & Chief Acct Officer) Sale 399 65.41 26,098
2008-05-30 Streeter Bruce A (President & CEO) Sale 2,027 65.41 132,586
2008-05-12 Streeter Bruce A (President & CEO) Sale 20,631 59.85 1,234,765
2008-05-12 Streeter Bruce A (President & CEO) Option Exercise 60,000 16.31 978,750
2008-05-12 Leech John E (Exec. VP - Operations) Sale 8,253 59.85 493,942
2008-05-12 Leech John E (Exec. VP - Operations) Option Exercise 24,000 16.31 391,500
2008-03-31 Mashinski Carla S (VP Acct & Chief Acct Officer) Option Exercise 634 39.44 25,004
2008-03-31 Streeter Bruce A (President & CEO) Option Exercise 634 39.44 25,004
2008-03-31 Guthrie Edward A (Exec. VP - Finance & CFO) Option Exercise 634 39.44 25,004
2008-03-17 Streeter Bruce A (President & CEO) Sale 1,983 52.43 103,968
2008-03-17 Leech John E (Exec. VP - Operations) Sale 1,331 52.43 69,784
2008-03-17 Guthrie Edward A (Exec. VP - Finance & CFO) Sale 1,625 52.43 85,198
2008-03-04 Mashinski Carla S (VP - Acct. & Chief Acct. Off.) Sale 857 54.62 46,809
2008-01-23 Leech John E (Exec. VP - Operations) Sale 881 40.62 35,786
2008-01-23 Guthrie Edward A (Exec. VP - Finance & CFO) Sale 2,674 40.62 108,617
2007-12-31 Guthrie Edward A (Exec. VP - Finance & CFO) Option Exercise 10,000 16.27 162,700
2007-07-20 Streeter Bruce A (President & CEO) Purchase 100 55.15 5,515
2007-06-29 Mashinski Carla S (VP - Acct. & Chief Acct. Off.) Option Exercise 461 39.55 18,232
2007-06-07 Mashinski Carla S (VP - Acct & Chief Acct. Off.) Sale 734 51.38 37,712
2007-05-30 Mashinski Carla S (VP - Acct. & Chief Acct. Off.) Sale 419 50.12 21,000
2007-05-30 Leech John E (Exec. VP - Operations) Sale 1,214 50.12 60,845
2007-05-30 Guthrie Edward A (Exec. VP - Finance & CFO) Sale 1,214 50.12 60,845
2007-04-20 Streeter Bruce A (President & CEO) Option Exercise 60,000 6.88 412,500
2007-04-20 Leech John E (Exec. V.P. - Operations) Sale 6,216 46.20 287,179
2007-04-20 Leech John E (Exec. V.P. - Operations) Option Exercise 24,000 6.88 165,000
2007-04-20 Guthrie Edward A (Exec. V.P. - Finance & CFO) Sale 3,000 46.20 138,600
2007-04-17 Streeter Bruce A (President & CEO) Sale 20,000 46.82 936,400
2007-03-30 Mashinski Carla S (Controller) Option Exercise 216 31.22 6,743
2007-03-30 Streeter Bruce A (President & CEO) Option Exercise 800 31.22 24,976
2007-03-30 Guthrie Edward A (Exec. VP - Finance & CFO) Option Exercise 801 31.22 25,007
2007-03-29 Crowe Marshall A (Director) Option Exercise 10,000 8.50 85,000
2007-03-29 Leech John E (Exec. V.P. - Operations) Sale 5,034 44.10 221,999
2007-03-28 Crowe Marshall A (Director) Sale 10,000 43.27 432,700
2007-03-27 Lehman Brothers Holdings Inc Sale 145 44.00 6,380
2007-03-26 Mashinski Carla S (Controller) Sale 1,000 44.19 44,192
2007-03-01 Lehman Brothers Holdings Inc Purchase 52 39.85 2,072
2006-11-06 Mashinski Carla S (Controller) Sale 1,524 36.43 55,519
2006-07-12 Leech John E (Exec. V.P. - Operations) Option Exercise 19,656 3.97 78,002
2006-07-06 Lehman Brothers Holdings Inc Purchase 2,352 26.89 63,245
2006-06-30 Mashinski Carla S (Controller) Option Exercise 857 21.95 18,811
2006-06-30 Lehman Brothers Holdings Inc Sale 2,352 25.73 60,516
2006-06-02 Crowe Marshall A (Director) Purchase 400 25.08 10,032
2006-06-02 Crowe Marshall A (Director) Sale 400 25.08 10,032
2006-03-31 Mashinski Carla S (Controller) Option Exercise 262 23.63 6,191
2006-03-31 Crowe Marshall A (Director) Sale 5,000 27.18 135,900
2006-03-31 Streeter Bruce A (President & COO) Option Exercise 1,059 23.63 25,024
2006-03-31 Guthrie Edward A (Exec. V.P. - Finance & CFO) Option Exercise 1,058 23.63 25,000
2006-03-17 Streeter Bruce A (President & COO) Option Exercise 78,620 2.68 211,000
2006-03-17 Leech John E (Exec. VP - Operations) Option Exercise 19,656 2.68 52,752
2006-01-18 Butters David J (Director) Option Exercise 49,138 2.68 131,886
2005-12-29 Guthrie Edward A (Exec. VP - Finance &) Option Exercise 100,000 8.06 806,300
2005-11-22 Mashinski Carla S (Controller) Sale 400 33.34 13,336
2005-08-31 Lehman Brothers Holdings Inc Sale 776 29.90 23,202
2005-08-23 Mashinski Carla S (Controller) Sale 379 28.81 10,918
2005-06-13 Lehman Brothers Holdings Inc Sale 40,000 24.95 998,000
2005-05-13 Crowe Marshall A (Director) Sale 10,000 25.30 253,000

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 Gulfmark Offshore Inc (symbol GLF, CIK number 1030749) see the Securities and Exchange Commission (SEC) website.

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