Introduction

This page provides a comprehensive analysis of the known insider trading history of Eric Andersen. Insiders are officers, directors, or significant investors in a company. It is illegal for insiders to make trades in their companies based on specific, non-public information. This does not mean it is illegal for them to make any trades in their own companies. However, they must report all trades to the SEC via a Form 4. Despite these restrictions, academic research suggests that insiders - in general - tend to outperform the market in their own companies.

Average Trade Profitability

The average trade profitability is the average return of all the open market purchases made by the insider in the last three years. To calculate this, we examine every open-market, unplanned purchase made by the insider, excluding all trades that were marked as part of a 10b5-1 trading plan. We then calculate the average performance of those trades over 3, 6, and 12 months, averaging each of those durations to generate a final performance metric for each trade. Finally, we average all of the performance metrics to calculate a performance metric for the insider. This list only includes insiders that have made at least three trades in the last two years.

If this insiders trade profitability is "N/A", then the insider either has not made any open-market purchases in the last three years, or the trades they’ve made are too recent to calculate a reliable performance metric.

Update Frequency: Daily

See the list of most profitable insider traders.

Companies with Reported Insider Positions

The SEC filings indicate Eric Andersen has reported holdings or trades in the following companies:

Security Title Latest Reported Holdings
US:MACK / Merrimack Pharmaceuticals, Inc. Director 534,008
How to Interpret the Charts

The following charts show the stock performance of securities subsequent to each open-market, non-planned trade made by Eric Andersen. Non-planned trade are trades that were not made as part of a 10b5-1 trading plan. The stock performance is charted as cumulative percent change in share price. For example, if an insider trade was made on January 1, 2019, the chart will show the daily percent change of the security to the present day. If the share price were to go from $10 to $15 during this time, the cumulative percent change in share price would be 50%. A change in price from $10 to $20 would be 100%, and a change in price of $10 to $5 would be -50%.

Ultimately, we are trying to determine how closely the insider’s trades correlate to excess returns (positive or negative) in the share price in order to see if the insider is timing their trades to profit from insider information. Consider the situation where an insider was doing this. In this situation, we would expect either (a) positive returns after purchases, or (b) negative returns after sales. In the case of (a), the PURCHASE chart would show a series of upwardly sloping curves, indicating positive returns after each purchase transaction. In the case of (b), the SALE chart would show a series of downward sloping curves, indicating negative returns after each sale transaction.

However, this alone is not enough to draw conclusions. If, for example, the share price of the company was in a non-cyclical climb over many years, then we would expect all the post-purchase plots to be upwardly sloping. Likewise, non-cyclical declines over many years would result in downward sloping post-trade plots. Neither of these charts would suggest insider trading activity.

The strongest indicator would be a situation where the share price was extremely cyclical, and there were both positive signals in the PURCHASE chart and negative plots on the SALE chart. This situation would be highly suggestive of an insider that was timing trades to their financial advantage.

Insider Trading History

This table shows the complete list of insider trades made by Eric Andersen as disclosed to the Securities Exchange Commission (SEC).

File Date Tran Date Form Ticker Security Code 10b5-1 Shares Remaining Shares Percent
Change
Share
Price
Tran
Value
Remaining
Value
2023-12-28 2023-12-28 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 857 534,008 0.16 13.35 11,441 7,129,167
2023-12-28 2023-12-26 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 48,693 533,151 10.05 13.15 640,313 7,010,936
2023-12-11 2023-12-07 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 24,666 484,458 5.36 12.85 316,953 6,225,188
2023-12-11 2023-12-07 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 76,384 1,735,600 4.60 12.85 981,519 22,302,113
2023-11-20 2023-11-17 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 65 459,792 0.01 12.50 812 5,747,400
2023-11-20 2023-11-17 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 235 1,659,216 0.01 12.50 2,938 20,740,200
2023-11-16 2023-11-14 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 10,887 459,727 2.43 12.50 136,088 5,746,588
2023-11-16 2023-11-14 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 39,283 1,658,981 2.43 12.50 491,038 20,737,262
2023-11-14 2023-11-13 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 3,379 448,840 0.76 12.39 41,858 5,560,050
2023-11-14 2023-11-13 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 12,191 1,619,698 0.76 12.39 151,017 20,064,171
2023-11-14 2023-11-10 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 8,259 445,461 1.89 12.32 101,769 5,489,060
2023-11-14 2023-11-10 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 29,803 1,607,507 1.89 12.32 367,239 19,808,023
2023-11-13 2023-11-09 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 2,165 437,202 0.50 12.19 26,396 5,330,498
2023-11-13 2023-11-09 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 7,810 1,577,704 0.50 12.19 95,222 19,235,840
2023-11-13 2023-11-08 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 9,040 435,037 2.12 12.13 109,673 5,277,869
2023-11-13 2023-11-08 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 4,783 1,569,894 0.31 12.13 58,027 19,045,954
2023-08-09 2023-08-08 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 18,626 425,997 4.57 12.00 223,436 5,110,217
2023-08-09 2023-08-08 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 68,431 1,565,111 4.57 12.00 820,891 18,774,915
2023-08-09 2023-08-07 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 49,857 407,371 13.95 12.00 598,468 4,889,959
2023-08-09 2023-08-07 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 84,636 1,496,680 5.99 12.00 1,015,945 17,965,698
2023-03-22 2023-03-21 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 33,181 357,514 10.23 11.52 382,245 4,118,561
2023-03-22 2023-03-21 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 127,409 1,412,044 9.92 11.52 1,467,752 16,266,747
2023-03-01 2023-01-31 4/A MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 450 324,333 0.14 11.40 5,130 3,697,331
2023-03-01 2023-01-31 4/A MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 1,782 1,284,635 0.14 11.40 20,314 14,644,582
2023-03-01 2023-01-30 4/A MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 4,985 323,883 1.56 11.36 56,618 3,678,534
2023-03-01 2023-01-30 4/A MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 19,750 1,282,853 1.56 11.36 224,313 14,570,131
2023-02-01 2023-01-31 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 450 324,306 0.14 11.40 5,130 3,697,024
2023-02-01 2023-01-31 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 1,782 1,284,635 0.14 11.40 20,314 14,644,582
2023-02-01 2023-01-30 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 4,958 323,856 1.55 11.36 56,311 3,678,227
2023-02-01 2023-01-30 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 19,750 1,282,853 1.56 11.36 224,313 14,570,131
2023-01-31 2023-01-27 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 4,410 318,898 1.40 11.40 50,259 3,634,321
2023-01-31 2023-01-27 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 17,465 1,263,103 1.40 11.40 199,040 14,394,953
2023-01-04 2023-01-03 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 8,219 314,488 2.68 11.33 93,148 3,564,155
2023-01-04 2023-01-03 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 22,413 1,245,638 1.83 11.33 254,011 14,117,065
2023-01-03 2022-12-30 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 8,270 306,269 2.78 11.33 93,721 3,470,855
2023-01-03 2022-12-30 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 33,030 1,223,225 2.78 11.33 374,319 13,862,442
2023-01-03 2022-12-29 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 28,661 297,999 10.64 10.55 302,382 3,143,979
2023-01-03 2022-12-29 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 189,975 1,190,195 18.99 10.55 2,004,293 12,556,914
2021-09-20 2021-07-01 4/A MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
S - Sale -52,914 269,338 -16.42 6.39 -338,120 1,721,070
2021-09-20 2021-07-01 4/A MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 52,914 1,000,220 5.59 6.39 338,120 6,391,406
2021-09-20 2021-04-14 4/A MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 6,495 322,252 2.06 6.63 43,081 2,137,465
2021-09-20 2021-04-14 4/A MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 40,805 947,306 4.50 6.63 270,655 6,283,386
2021-04-16 2021-04-14 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 6,495 322,252 2.06 6.63 43,081 2,137,465
2021-04-16 2021-04-14 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 40,805 947,396 4.50 6.63 270,655 6,283,983
2021-04-15 2021-04-13 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 9,874 906,591 1.10 6.26 61,780 5,672,359
2021-04-14 2021-04-12 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 23,629 896,717 2.71 6.06 143,194 5,434,195
2020-11-27 2020-11-24 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 18,014 315,757 6.05 3.65 65,751 1,152,513
2020-11-27 2020-11-24 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 51,074 873,088 6.21 3.65 186,420 3,186,771
2020-11-16 2020-11-12 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 54,531 297,743 22.42 3.65 199,038 1,086,762
2020-11-16 2020-11-12 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 1,959 822,014 0.24 3.65 7,150 3,000,351
2020-08-17 2020-08-13 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 609 820,055 0.07 3.50 2,132 2,870,192
2020-08-13 2020-08-12 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 2,000 243,212 0.83 3.49 6,986 849,540
2020-08-13 2020-08-11 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 14,030 241,212 6.18 3.45 48,437 832,760
2020-07-24 2020-07-22 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 33,192 227,182 17.11 3.04 100,967 691,065
2020-07-24 2020-07-22 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 17,404 193,990 9.86 3.20 55,728 621,156
2020-07-24 2020-07-22 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 63,903 819,446 8.46 3.04 194,387 2,492,673
2020-07-24 2020-07-22 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 62,775 755,543 9.06 3.20 201,006 2,419,249
2020-04-22 2020-04-21 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 1,424 692,768 0.21 3.25 4,628 2,251,496
2020-04-22 2020-04-20 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 2,325 691,344 0.34 3.25 7,556 2,246,868
2020-04-08 2020-04-07 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 5,899 689,019 0.86 3.03 17,885 2,088,968
2020-04-07 2020-04-06 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 6,043 683,120 0.89 3.00 18,108 2,046,969
2020-04-07 2020-04-03 4 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
P - Purchase 10,750 677,077 1.61 2.60 27,924 1,758,775
2019-09-27 3 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
1,509,240
2019-09-27 3 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
1,019,499
2019-09-27 3 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
1,509,240
2019-09-27 3 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
1,019,499
2019-09-27 3 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
1,509,240
2019-09-27 3 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
1,019,499
2019-09-27 3 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
1,509,240
2019-09-27 3 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
1,019,499
2019-09-27 3 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
1,509,240
2019-09-27 3 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
1,019,499
2019-09-27 3 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
1,509,240
2019-09-27 3 MACK MERRIMACK PHARMACEUTICALS INC
Common Stock
1,019,499
P
Open market or private purchase of non-derivative or derivative security
S
Open market or private sale of non-derivative or derivative security
A
Grant, award, or other acquisition of securities from the company (such as an option)
C
Conversion of derivative
D
Sale or transfer of securities back to the company
F
Payment of exercise price or tax liability using portion of securities received from the company
G
Gift of securities by or to the insider
K
Equity swaps and similar hedging transactions
M
Exercise or conversion of derivative security received from the company (such as an option)
V
A transaction voluntarily reported on Form 4
J
Other (accompanied by a footnote describing the transaction)