Eric Andersen insider trades: Merrimack Pharmaceuticals (MACK) stock purchases
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Eric reports to the SEC
Open-market buys and sales
25 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Dec 28, 2023 | MACK | ↑ Buy | 49,550 | $13.15 | $652K | Indirect | Dec 28, 2023 (0d) |
| Dec 7, 2023 | MACK | ↑ Buy | 101,050 | $12.85 | $1.3M | Indirect | Dec 11, 2023 (4d) |
| Nov 17, 2023 | MACK | ↑ Buy | 300 | $12.50 | $4K | Indirect | Nov 20, 2023 (3d) |
| Nov 14, 2023 | MACK | ↑ Buy | 50,170 | $12.50 | $627K | Indirect | Nov 16, 2023 (2d) |
| Nov 13, 2023 | MACK | ↑ Buy | 53,632 | $12.34 | $662K | Indirect | Nov 14, 2023 (1d) |
| Nov 9, 2023 | MACK | ↑ Buy | 23,798 | $12.16 | $289K | Indirect | Nov 13, 2023 (4d) |
| Aug 8, 2023 | MACK | ↑ Buy | 221,550 | $12.00 | $2.7M | Indirect | Aug 9, 2023 (1d) |
| Mar 21, 2023 | MACK | ↑ Buy | 160,590 | $11.52 | $1.8M | Indirect | Mar 22, 2023 (1d) |
| Jan 31, 2023 | MACK | ↑ Buy | 26,940 | $11.36 | $306K | Indirect | Feb 1, 2023 (1d) |
| Jan 27, 2023 | MACK | ↑ Buy | 21,875 | $11.40 | $249K | Indirect | Jan 31, 2023 (4d) |
| Jan 3, 2023 | MACK | ↑ Buy | 30,632 | $11.33 | $347K | Indirect | Jan 4, 2023 (1d) |
| Dec 30, 2022 | MACK | ↑ Buy | 259,936 | $10.67 | $2.8M | Indirect | Jan 3, 2023 (4d) |
| Apr 14, 2021 | MACK | ↑ Buy | 47,300 | $6.63 | $314K | Indirect | Apr 16, 2021 (2d) |
| Apr 13, 2021 | MACK | ↑ Buy | 9,874 | $6.26 | $62K | Indirect | Apr 15, 2021 (2d) |
| Apr 12, 2021 | MACK | ↑ Buy | 23,629 | $6.06 | $143K | Indirect | Apr 14, 2021 (2d) |
| Nov 24, 2020 | MACK | ↑ Buy | 69,088 | $3.65 | $252K | Indirect | Nov 27, 2020 (3d) |
| Nov 12, 2020 | MACK | ↑ Buy | 56,490 | $3.65 | $206K | Indirect | Nov 16, 2020 (4d) |
| Aug 13, 2020 | MACK | ↑ Buy | 609 | $3.50 | $2K | Indirect | Aug 17, 2020 (4d) |
| Aug 12, 2020 | MACK | ↑ Buy | 16,030 | $3.46 | $55K | Indirect | Aug 13, 2020 (1d) |
| Jul 22, 2020 | MACK | ↑ Buy | 177,274 | $3.11 | $552K | Indirect | Jul 24, 2020 (2d) |
| Apr 21, 2020 | MACK | ↑ Buy | 3,749 | $3.25 | $12K | Indirect | Apr 22, 2020 (1d) |
| Apr 7, 2020 | MACK | ↑ Buy | 5,899 | $3.03 | $18K | Indirect | Apr 8, 2020 (1d) |
| Apr 6, 2020 | MACK | ↑ Buy | 16,793 | $2.74 | $46K | Indirect | Apr 7, 2020 (1d) |
| Mar 21, 2011 | HDLM | ↑ Buy | 1,350 | $0.11 | $149 | Direct | Apr 8, 2011 (18d) |
| Mar 14, 2011 | HDLM | ↑ Buy | 3,000 | $0.13 | $386 | Direct | Apr 8, 2011 (25d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
About Eric Andersen's insider trades
Eric Andersen is an insider at Merrimack Pharmaceuticals (MACK). Since Mar 14, 2011, Eric has reported 25 open-market purchases worth $13.4M and no sales on SEC Form 4. There have been no open-market trades in the last 12 months.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every MACK insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.