Introduction

This page provides a comprehensive analysis of the known insider trading history of David B Elsbree. 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 David B Elsbree has reported holdings or trades in the following companies:

Security Title Latest Reported Holdings
US:TTOO / T2 Biosystems, Inc. Director 23
US:APKT / Acme Packet Inc Director 0
How to Interpret the Charts

The following charts show the stock performance of securities subsequent to each open-market, non-planned trade made by David B Elsbree. 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 David B Elsbree 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
2024-09-17 2024-09-13 4 TTOO T2 Biosystems, Inc.
Common Stock
S - Sale -55 23 -70.51 2.42 -133 56
2023-10-11 2023-09-15 4 TTOO T2 Biosystems, Inc.
Common Stock
M - Exercise 2,300 7,824 41.64
2022-06-28 2022-06-25 4 TTOO T2 Biosystems, Inc.
Common Stock
M - Exercise 73,224 276,205 36.07
2022-01-04 2022-01-01 4 TTOO T2 Biosystems, Inc.
Restricted Stock Units
M - Exercise 32,258 0 -100.00
2022-01-04 2022-01-01 4 TTOO T2 Biosystems, Inc.
Common Stock
M - Exercise 32,258 202,981 18.89
2021-06-29 2021-06-25 4 TTOO T2 Biosystems, Inc.
Restricted Stock Units
A - Award 73,224 73,224
2021-06-29 2021-06-25 4 TTOO T2 Biosystems, Inc.
Restricted Stock Units
M - Exercise -45,454 45,454 -50.00
2021-06-29 2021-06-25 4 TTOO T2 Biosystems, Inc.
Common Stock
M - Exercise 45,454 170,723 36.29
2021-01-05 2021-01-01 4 TTOO T2 Biosystems, Inc.
Restricted Stock Units
M - Exercise 34,188 34,188
2021-01-05 2021-01-01 4 TTOO T2 Biosystems, Inc.
Restricted Stock Units
A - Award 32,258 32,258
2021-01-05 2021-01-01 4 TTOO T2 Biosystems, Inc.
Common Stock
M - Exercise 34,188 125,269 37.54
2020-08-07 2020-08-06 4 TTOO T2 Biosystems, Inc.
Restricted Stock Units
A - Award 45,454 45,454
2020-01-07 2020-01-03 4 TTOO T2 Biosystems, Inc.
Common Stock
S - Sale X -5,316 91,081 -5.51 1.16 -6,167 105,654
2020-01-03 2020-01-01 4 TTOO T2 Biosystems, Inc.
Restricted Stock Units
M - Exercise 13,289 13,289
2020-01-03 2020-01-01 4 TTOO T2 Biosystems, Inc.
Restricted Stock Units
A - Award 34,188 34,188
2020-01-03 2020-01-01 4 TTOO T2 Biosystems, Inc.
Common Stock
M - Exercise 13,289 96,397 15.99
2019-06-13 2019-06-11 4 TTOO T2 Biosystems, Inc.
Common Stock
S - Sale X -3,600 83,108 -4.15 1.44 -5,184 119,676
2019-06-11 2019-06-08 4 TTOO T2 Biosystems, Inc.
Restricted Stock Units
M - Exercise 9,000 9,000
2019-06-11 2019-06-08 4 TTOO T2 Biosystems, Inc.
Common Stock
M - Exercise 9,000 86,708 11.58
2019-06-11 2019-06-07 4 TTOO T2 Biosystems, Inc.
Stock Option (Right to Buy)
A - Award 22,000 22,000
2019-01-03 2019-01-01 4 TTOO T2 Biosystems, Inc.
Restricted Stock Units
M - Exercise 9,708 9,708
2019-01-03 2019-01-01 4 TTOO T2 Biosystems, Inc.
Restricted Stock Units
A - Award 13,289 13,289
2019-01-03 2019-01-01 4 TTOO T2 Biosystems, Inc.
Common Stock
M - Exercise 9,708 77,708 14.28
2018-06-12 2018-06-08 4 TTOO T2 Biosystems, Inc.
Restricted Stock Units
A - Award 9,000 9,000
2018-06-05 2018-06-02 4 TTOO T2 Biosystems, Inc.
Common Stock
M - Exercise 18,000 68,000 36.00
2018-06-05 2018-06-01 4 TTOO T2 Biosystems, Inc.
Common Stock
P - Purchase 4,225 10,000 73.16 7.65 32,321 76,500
2018-06-05 2017-06-02 4 TTOO T2 Biosystems, Inc.
Restricted Stock Units
M - Exercise 18,000 18,000
2018-01-03 2018-01-01 4 TTOO T2 Biosystems, Inc.
Restricted Stock Units
A - Award 9,708 9,708
2017-11-17 2017-11-16 4 TTOO T2 Biosystems, Inc.
Common Stock
P - Purchase 1,500 5,775 35.09 4.11 6,165 23,735
2017-06-08 2017-06-06 4 TTOO T2 Biosystems, Inc.
Common Stock
P - Purchase 10,000 50,000 25.00 3.50 35,000 175,000
2017-06-06 2017-06-02 4 TTOO T2 Biosystems, Inc.
Restricted Stock Units
A - Award 18,000 18,000
2017-03-17 2017-03-15 4 TTOO T2 Biosystems, Inc.
Common Stock
P - Purchase 10,000 40,000 33.33 5.97 59,700 238,800
2016-06-21 2016-06-17 4 TTOO T2 Biosystems, Inc.
Stock Option (Right to Buy)
A - Award 17,647 17,647
2015-12-10 2015-12-09 4 TTOO T2 Biosystems, Inc.
Common Stock
P - Purchase 10,000 30,000 50.00 9.75 97,500 292,500
2015-12-10 2015-12-08 4 TTOO T2 Biosystems, Inc.
Employee Stock Option (right to buy)
G - Gift -5,882 11,765 -33.33
2015-12-10 2015-12-08 4 TTOO T2 Biosystems, Inc.
Employee Stock Option (right to buy)
G - Gift -7,189 8,987 -44.44
2015-12-10 2015-12-08 4 TTOO T2 Biosystems, Inc.
Employee Stock Option (right to buy)
G - Gift -22,222 27,778 -44.44
2015-08-11 2015-08-07 4 TTOO T2 Biosystems, Inc.
Common Stock
P - Purchase 75 4,275 1.79 13.09 982 55,959
2015-06-23 2015-06-19 4 TTOO T2 Biosystems, Inc.
Stock Option (Right to Buy)
A - Award 17,647 17,647
2015-05-21 2015-05-19 4 TTOO T2 Biosystems, Inc.
Common Stock
P - Purchase 250 4,200 6.33 16.48 4,120 69,216
2015-05-21 2015-05-19 4 TTOO T2 Biosystems, Inc.
Common Stock
P - Purchase 6,000 20,000 42.86 16.47 98,820 329,400
2015-03-06 2015-03-04 4 TTOO T2 Biosystems, Inc.
Common Stock
P - Purchase 1,450 3,950 58.00 15.05 21,822 59,448
2014-11-17 2014-11-13 4 TTOO T2 Biosystems, Inc.
Common Stock
P - Purchase 1,500 2,500 150.00 14.75 22,125 36,875
2014-11-17 2014-10-07 4 TTOO T2 Biosystems, Inc.
Common Stock
G - Gift 1,000 1,000
2014-11-17 2014-10-07 4 TTOO T2 Biosystems, Inc.
Common Stock
G - Gift -1,000 14,000 -6.67
2014-08-14 2014-08-12 4 TTOO T2 Biosystems, Inc.
Common Stock
P - Purchase 15,000 15,000 11.00 165,000 165,000
2013-03-29 2013-03-28 4 APKT ACME PACKET INC
Stock Option (Right to Buy)
D - Sale to Issuer -12,500 0 -100.00 2.47 -30,875
2013-03-29 2013-03-28 4 APKT ACME PACKET INC
Stock Option (Right to Buy)
D - Sale to Issuer -12,500 0 -100.00 16.80 -210,000
2013-03-29 2013-03-28 4 APKT ACME PACKET INC
Stock Option (Right to Buy)
D - Sale to Issuer -12,500 0 -100.00 14.80 -185,000
2013-03-29 2013-03-28 4 APKT ACME PACKET INC
Stock Option (Right to Buy)
D - Sale to Issuer -12,500 0 -100.00 2.56 -32,000
2013-03-29 2013-03-28 4 APKT ACME PACKET INC
Common Stock
D - Sale to Issuer -700 0 -100.00 29.25 -20,475
2013-03-29 2013-03-28 4 APKT ACME PACKET INC
Common Stock
D - Sale to Issuer -19,937 0 -100.00 29.25 -583,157
2012-08-16 2012-08-15 4 APKT ACME PACKET INC
Common Stock
P - Purchase 500 700 250.00 16.90 8,450 11,830
2012-08-16 2012-08-15 4 APKT ACME PACKET INC
Common Stock
P - Purchase 9,000 19,937 82.29 16.89 152,025 336,770
2012-05-08 2012-05-04 4 APKT ACME PACKET INC
Stock Option (Right to Buy)
A - Award 12,500 12,500
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)