MATK SEC Form 4 filings
Martek Biosciences Corp Latest Insider Trading Activity
Our insider trading activity tracker for Martek Biosciences Corp shows 11 total open-market insider transactions for MATK over the past 7,394 days. The most recent displayed transaction was on July 7, 2010, when Dubin Steve (Martek Biosciences Corp Chief Executive Officer) reported a purchase of 2,000 shares at $20.96 per share. This page shows up to the 10 most recent SEC Form 4 filing records on a 6-hour delay. Sign up for real-time updates and access to 20 years of historic insider trading data.
Insider Trading For MATK Charted on Daily Candles. Scroll left or zoom out to load earlier candles (up to 2 years).
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| Ticker | Filing Date | Transaction Date | Company | Insider | Title | Transaction | Trade Count | Shares | Avg. Price | Total Value | Position Size Change | SEC Filing |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Unexplained: transactions without an ESPP, DRIP, 10b5-1, tax liability, or Explained M/S tag. MATK | 2010-07-07 | 2010-07-07 | Martek Biosciences Corp | Dubin Steve | Chief Executive Officer | Buy | 1 | 2,000 | $20.96 | $41,920.00 | 6.16% | View Filing |
| Unexplained: transactions without an ESPP, DRIP, 10b5-1, tax liability, or Explained M/S tag. MATK | 2010-01-19 | 2009-09-23 | Martek Biosciences Corp | Macmaster Jr Douglas J | Director | Sell | 1 | 4,907 | $23.80 | $116,786.60 | 22.17% | View Filing |
| Unexplained: transactions without an ESPP, DRIP, 10b5-1, tax liability, or Explained M/S tag. MATK | 2008-06-18 | 2008-06-18 | Martek Biosciences Corp | Macmaster Jr Douglas J | Director | Sell | 1 | 8,000 | $33.61 | $268,880.00 | 28.47% | View Filing |
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting MATK | 2008-06-18 | 2008-06-18 | Martek Biosciences Corp | D'Andrea Harry J | Director | Sell | 1 | 1,500 | $34.03 | $51,045.00 | 27.15% | View Filing |
| Unexplained: transactions without an ESPP, DRIP, 10b5-1, tax liability, or Explained M/S tag. MATK | 2008-01-14 | 2007-12-21 | Martek Biosciences Corp | Beery James | Director | Sell | 2 | 500 | $28.74 | $14,369.12 | 54.82% | View Filing |
| Unexplained: transactions without an ESPP, DRIP, 10b5-1, tax liability, or Explained M/S tag. MATK | 2007-04-05 | 2007-04-04 | Martek Biosciences Corp | Buzy Peter L | CFO, Treasurer and Exec VP | Buy | 1 | 3,864.29 | $21.22 | $82,000.23 | 100.00% | View Filing |
| Unexplained: transactions without an ESPP, DRIP, 10b5-1, tax liability, or Explained M/S tag. MATK | 2006-09-12 | 2006-09-12 | Martek Biosciences Corp | Flanagan Robert J | Director | Buy | 1 | 2,500 | $21.48 | $53,700.00 | 25.00% | View Filing |
| Unexplained: transactions without an ESPP, DRIP, 10b5-1, tax liability, or Explained M/S tag. MATK | 2006-09-11 | 2006-09-11 | Martek Biosciences Corp | Dubin Steve | President & CEO | Buy | 1 | 4,000 | $20.69 | $82,760.00 | 28.17% | View Filing |
| Unexplained: transactions without an ESPP, DRIP, 10b5-1, tax liability, or Explained M/S tag. MATK | 2006-09-11 | 2006-09-11 | Martek Biosciences Corp | Flanagan Robert J | Director | Buy | 1 | 2,500 | $20.84 | $52,100.00 | 33.33% | View Filing |
| Explained M/S: sale activity tied to share conversions or derivative-related share movements. MATK | 2006-06-21 | 2006-06-21 | Martek Biosciences Corp | Mahar John H | Director | Sell | 1 | 5,000 | $28.68 | $143,400.00 | 100.00% | View Filing |
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Alerts are based on public SEC filings and are provided for informational purposes only; they do not constitute financial advice.