Introduction

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

Security Title Latest Reported Holdings
US:AQ / Aquantia Corp. VP Worldwide Sales 100,000
US:LLTC / Linear Technology Corp. VP INTERNATIONAL SALES 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 A Quarles. 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 A Quarles 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
2019-02-26 2019-02-22 4 AQ AQUANTIA CORP
Common Stock
A - Award 25,000 100,000 33.33
2018-10-25 2018-10-24 4 AQ AQUANTIA CORP
Restricted Stock Units
A - Award 75,000 75,000
2017-03-13 2017-03-10 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
D - Sale to Issuer -52,633 0 -100.00
2017-02-06 2017-02-03 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
S - Sale -3,013 52,633 -5.41 63.30 -190,723 3,331,669
2017-01-24 2017-01-23 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
F - Taxes -375 55,646 -0.67 62.43 -23,411 3,473,980
2017-01-24 2017-01-21 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
F - Taxes -1,567 56,021 -2.72 62.43 -97,828 3,497,391
2016-10-26 2016-10-25 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
S - Sale -900 57,588 -1.54 60.22 -54,198 3,467,949
2016-10-26 2016-10-25 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
S - Sale -2,100 58,488 -3.47 60.23 -126,483 3,522,732
2016-10-24 2016-10-23 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
F - Taxes -2,087 60,588 -3.33 60.01 -125,241 3,635,886
2016-08-01 2016-08-01 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
F - Taxes -1,211 62,675 -1.90 59.99 -72,648 3,759,873
2016-04-28 2016-04-27 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
F - Taxes -1,127 63,886 -1.73 45.96 -51,797 2,936,201
2016-04-22 2016-04-22 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
S - Sale -2,000 65,013 -2.98 46.17 -92,342 3,001,702
2016-04-21 2016-04-21 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
A - Award 20,000 67,013 42.54 0.00 20 67
2016-03-01 2016-02-29 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
S - Sale -3,000 47,013 -6.00 43.84 -131,517 2,061,003
2016-02-11 2016-02-10 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
S - Sale -3,029 50,013 -5.71 40.68 -123,210 2,034,364
2016-01-25 2016-01-23 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
F - Taxes -375 53,042 -0.70 41.73 -15,649 2,213,443
2016-01-25 2016-01-21 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
F - Taxes -1,596 53,417 -2.90 41.13 -65,643 2,197,041
2015-11-30 2015-11-25 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
S - Sale -1,913 55,013 -3.36 45.34 -86,726 2,494,014
2015-10-23 2015-10-23 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
F - Taxes -2,087 59,426 -3.39 45.93 -95,856 2,729,436
2015-10-23 2015-10-23 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
S - Sale -2,500 56,926 -4.21 46.22 -115,551 2,631,148
2015-08-03 2015-08-01 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
F - Taxes -1,565 61,513 -2.48 41.00 -64,165 2,522,033
2015-05-15 2015-05-14 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Stock option granted (right to buy)
M - Exercise -20,000 0 -100.00
2015-05-15 2015-05-14 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
S - Sale -20,000 63,078 -24.07 46.76 -935,166 2,949,420
2015-05-15 2015-05-14 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
M - Exercise 20,000 89,078 28.95 22.74 454,800 2,025,634
2015-04-27 2015-04-27 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
F - Taxes -1,127 63,078 -1.76 46.10 -51,955 2,907,896
2015-04-22 2015-04-22 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
S - Sale -2,500 64,205 -3.75 47.64 -119,100 3,058,733
2015-01-23 2015-01-23 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
F - Taxes -368 66,705 -0.55 46.86 -17,243 3,125,463
2015-01-20 2015-01-20 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
F - Taxes -1,020 67,073 -1.50 45.32 -46,226 3,039,748
2015-01-15 2015-01-15 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
A - Award 20,000 68,093 41.59 0.00 20 68
2014-10-29 2014-10-29 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
S - Sale -3,000 48,093 -5.87 41.00 -123,000 1,971,813
2014-10-24 2014-10-23 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
F - Taxes -2,087 51,093 -3.92 40.27 -84,043 2,057,515
2014-08-29 2014-08-28 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
M - Exercise -10,000 20,000 -33.33
2014-08-29 2014-08-28 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
S - Sale -3,558 53,180 -6.27 45.09 -160,418 2,397,700
2014-08-29 2014-08-28 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
S - Sale -10,000 56,738 -14.98 45.08 -450,796 2,557,726
2014-08-29 2014-08-28 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
M - Exercise 10,000 66,738 17.62 22.74 227,400 1,517,622
2014-08-01 2014-08-01 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
F - Taxes -1,565 56,738 -2.68 44.14 -69,071 2,504,132
2014-04-28 2014-04-27 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
F - Taxes -1,302 58,303 -2.18 44.64 -58,121 2,602,646
2014-04-24 2014-04-24 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Stock option granted (right to buy)
M - Exercise -10,000 30,000 -25.00
2014-04-24 2014-04-24 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
S - Sale -10,000 59,605 -14.37 47.35 -473,487 2,822,219
2014-04-24 2014-04-24 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
M - Exercise 10,000 69,605 16.78 22.74 227,400 1,582,818
2014-02-20 2014-02-20 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Stock option granted (right to buy)
M - Exercise -10,000 40,000 -20.00
2014-02-20 2014-02-20 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
S - Sale -10,000 59,605 -14.37 45.91 -459,065 2,736,257
2014-02-20 2014-02-20 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
M - Exercise 10,000 69,605 16.78 22.74 227,400 1,582,818
2014-01-23 2014-01-23 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
F - Taxes -375 59,605 -0.63 46.59 -17,471 2,776,997
2014-01-21 2014-01-20 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
F - Taxes -1,008 59,980 -1.65 46.00 -46,368 2,759,080
2014-01-21 2014-01-17 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
S - Sale -2,000 60,988 -3.18 46.00 -92,000 2,805,454
2013-11-07 2013-11-06 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Stock Option granted (right to buy)
M - Exercise -10,000 0 -100.00
2013-11-07 2013-11-06 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
S - Sale -10,000 62,988 -13.70 41.20 -411,978 2,594,967
2013-11-07 2013-11-06 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
M - Exercise 10,000 72,988 15.88 39.24 392,400 2,864,049
2013-11-04 2013-11-04 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Stock option granted (right to buy)
M - Exercise -10,000 10,000 -50.00 41.04 -410,400 410,400
2013-11-04 2013-11-04 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
S - Sale -10,000 62,988 -13.70 41.04 -410,400 2,585,028
2013-11-04 2013-11-04 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
M - Exercise 10,000 72,988 15.88 39.24 392,400 2,864,049
2013-10-22 2013-10-22 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
F - Taxes -939 62,988 -1.47 39.32 -36,921 2,476,688
2013-10-17 2013-10-17 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
A - Award 20,000 63,927 45.53 0.00 20 64
2013-08-30 2013-08-29 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
S - Sale -3,000 43,927 -6.39 38.71 -116,130 1,700,419
2013-08-02 2013-08-01 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
F - Taxes -1,565 46,927 -3.23 40.56 -63,469 1,903,124
2013-04-29 2013-04-27 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
F - Taxes -1,127 48,492 -2.27 35.48 -39,986 1,720,496
2013-02-28 2013-02-27 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Stock Option Granted (right to buy)
M - Exercise -10,000 50,000 -16.67
2013-02-28 2013-02-27 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
S - Sale -10,000 49,619 -16.77 38.19 -381,927 1,895,084
2013-02-28 2013-02-27 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
M - Exercise 10,000 59,619 20.15 22.74 227,400 1,355,736
2013-02-14 2013-02-13 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Stock Option Granted (right to buy)
M - Exercise -10,000 60,000 -14.29
2013-02-14 2013-02-13 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
S - Sale -10,000 49,619 -16.77 37.57 -375,687 1,864,121
2013-02-14 2013-02-13 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
M - Exercise 10,000 59,619 20.15 22.74 227,400 1,355,736
2013-02-05 2013-02-01 4 LLTC LINEAR TECHNOLOGY CORP /CA/
Common Stock
S - Sale -1,000 49,619 -1.98 37.00 -37,000 1,835,903
2013-02-01 2013-02-01 4 LLTC LINEAR TECHNOLOGY CORP /CA/
STOCK OPTION GRANTED (RIGHT TO BUY)
M - Exercise -10,000 60,000 -14.29
2013-02-01 2013-02-01 4 LLTC LINEAR TECHNOLOGY CORP /CA/
COMMON STOCK
S - Sale -10,000 50,619 -16.50 37.00 -370,000 1,872,903
2013-02-01 2013-02-01 4 LLTC LINEAR TECHNOLOGY CORP /CA/
COMMON STOCK
M - Exercise 10,000 60,619 19.76 22.74 227,400 1,378,476
2013-01-31 2013-01-31 4 LLTC LINEAR TECHNOLOGY CORP /CA/
STOCK OPTION GRANTED (RIGHT TO BUY)
M - Exercise -10,000 70,000 -12.50
2013-01-31 2013-01-31 4 LLTC LINEAR TECHNOLOGY CORP /CA/
COMMON STOCK
S - Sale -10,000 50,619 -16.50 36.68 -366,808 1,856,745
2013-01-31 2013-01-31 4 LLTC LINEAR TECHNOLOGY CORP /CA/
COMMON STOCK
M - Exercise 10,000 60,619 19.76 22.74 227,400 1,378,476
2013-01-22 2013-01-20 4 LLTC LINEAR TECHNOLOGY CORP /CA/
COMMON STOCK
F - Taxes -939 50,619 -1.82 36.48 -34,255 1,846,581
2013-01-18 2013-01-17 4 LLTC LINEAR TECHNOLOGY CORP /CA/
COMMON STOCK
A - Award 5,000 51,558 10.74 0.00 5 52
2012-11-05 2012-11-05 4 LLTC LINEAR TECHNOLOGY CORP /CA/
STOCK OPTION GRANTED (RIGHT TO BUY)
M - Exercise -17,500 0 -100.00
2012-11-05 2012-11-05 4 LLTC LINEAR TECHNOLOGY CORP /CA/
COMMON STOCK
S - Sale -2,500 46,558 -5.10 32.60 -81,506 1,517,898
2012-11-05 2012-11-05 4 LLTC LINEAR TECHNOLOGY CORP /CA/
COMMON STOCK
S - Sale -17,500 49,058 -26.29 32.60 -570,540 1,599,404
2012-11-05 2012-11-05 4 LLTC LINEAR TECHNOLOGY CORP /CA/
COMMON STOCK
M - Exercise 17,500 66,558 35.67 29.37 513,975 1,954,808
2012-10-22 2012-10-22 4 LLTC LINEAR TECHNOLOGY CORP /CA/
COMMON STOCK
F - Taxes -1,006 49,058 -2.01 31.20 -31,387 1,530,610
2012-08-01 2012-08-01 4 LLTC LINEAR TECHNOLOGY CORP /CA/
COMMON STOCK
F - Taxes -916 50,064 -1.80 32.25 -29,541 1,614,564
2012-07-27 2012-07-26 4 LLTC LINEAR TECHNOLOGY CORP /CA/
COMMON STOCK
A - Award 15,000 50,980 41.69 0.00 15 51
2012-04-27 2012-04-27 4 LLTC LINEAR TECHNOLOGY CORP /CA/
COMMON STOCK
F - Taxes -1,100 35,980 -2.97 32.62 -35,882 1,173,668
2012-01-26 2012-01-26 4 LLTC LINEAR TECHNOLOGY CORP /CA/
STOCK OPTION GRANTED (RIGHT TO BUY)
M - Exercise -13,434 0 -100.00
2012-01-26 2012-01-26 4 LLTC LINEAR TECHNOLOGY CORP /CA/
COMMON STOCK
S - Sale -13,434 37,080 -26.59 33.46 -449,502 1,240,697
2012-01-26 2012-01-26 4 LLTC LINEAR TECHNOLOGY CORP /CA/
COMMON STOCK
M - Exercise 13,434 50,514 36.23 25.05 336,522 1,265,376
2012-01-20 2012-01-20 4 LLTC LINEAR TECHNOLOGY CORP /CA/
COMMON STOCK
F - Taxes -1,003 37,080 -2.63 33.40 -33,500 1,238,472
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)