William C Griffiths - Insider Trading Tracker

Introduction

This page provides a comprehensive analysis of the known insider trading history of William C Griffiths. 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

Companies with Reported Insider Positions

The SEC filings indicate William C Griffiths has reported holdings or trades in the following companies:

How to Interpret the Charts

The following charts show the stock performance of securities subsequent to each open-market, non-planned trade made by William C Griffiths. 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 Purchases NX / Quanex Building Products Corporation - Short Term Profit Analysis

In this section, we analyze the profitability of every unplanned, open-market insider purchase made in NX / Quanex Building Products Corporation. This analysis helps to understand if the insider consistently generates abnormal returns, and is worth following. This analysis is for one-year following each trade, and the results are theoretical.

The following table shows the most recent open market purchases that were not part of an automatic trading plan.

Trade Date	Ticker	Insider	Reported Shares	Reported Price	Adjusted Shares	Adjusted Price	Cost Basis	Days to Max	Price at Max	Max Profit ($)	Max Return (%)
There are no known unplanned open-market trades for this insider and security combination

Adjusted Price is the split-adjusted price. Adjusted Shares is the split-adjusted shares.

Insider Sales NX / Quanex Building Products Corporation - Short Term Loss Analysis

In this section, we analyze the short-term loss avoidance of every unplanned, open-market insider sale made in NX / Quanex Building Products Corporation. A consistent pattern of loss avoidance may suggest that future sale transactions may predict declines in price. This analysis is for one-year following each trade, and the results are theoretical.

The following table shows the most recent open market sales that were not part of an automatic trading plan.

Trade Date	Ticker	Insider	Reported Shares	Reported Price	Adjusted Shares	Adjusted Price	Cost Basis	Days to Min	Price at Min	Max Loss Avoided ($)	Max Loss Avoided (%)
2021-02-24	NX	GRIFFITHS WILLIAM C	5,602	25.0317	5,602	25.0317	140,228	245	20.34	-26,282	-18.74
2021-02-23	NX	GRIFFITHS WILLIAM C	34,496	24.5908	34,496	24.5908	848,284
2021-02-22	NX	GRIFFITHS WILLIAM C	23,605	24.7509	23,605	24.7509	584,245
2021-02-19	NX	GRIFFITHS WILLIAM C	18,213	24.3238	18,213	24.3238	443,009
2021-02-17	NX	GRIFFITHS WILLIAM C	29,941	24.0961	29,941	24.0961	721,461
2021-02-16	NX	GRIFFITHS WILLIAM C	26,744	24.4401	26,744	24.4401	653,626
2021-02-12	NX	GRIFFITHS WILLIAM C	45,657	24.6784	45,657	24.6784	1,126,742
2021-02-11	NX	GRIFFITHS WILLIAM C	26,024	24.3460	26,024	24.3460	633,580
2021-02-10	NX	GRIFFITHS WILLIAM C	15,792	24.4571	15,792	24.4571	386,227
2021-02-09	NX	GRIFFITHS WILLIAM C	28,750	24.7128	28,750	24.7128	710,493
2021-02-08	NX	GRIFFITHS WILLIAM C	37,576	24.9721	37,576	24.9721	938,352
2020-12-24	NX	GRIFFITHS WILLIAM C	22,186	22.5122	22,186	22.5122	499,456
2020-12-23	NX	GRIFFITHS WILLIAM C	41,664	22.5099	41,664	22.5099	937,852
2020-12-21	NX	GRIFFITHS WILLIAM C	11,150	22.5001	11,150	22.5001	250,876
2020-12-18	NX	GRIFFITHS WILLIAM C	100,000	22.6663	100,000	22.6663	2,266,630
2020-12-17	NX	GRIFFITHS WILLIAM C	8,132	22.5125	8,132	22.5125	183,072
2020-12-17	NX	GRIFFITHS WILLIAM C	5,987	22.5125	5,987	22.5125	134,782
2020-10-02	NX	GRIFFITHS WILLIAM C	6,390	18.8158	6,390	18.8158	120,233

Adjusted Price is the split-adjusted price. Adjusted Shares is the split-adjusted shares.

Insider Trading History

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