Introduction

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

Security Title Latest Reported Holdings
US:ALTM / Arcadium Lithium plc Chief Accounting Officer 0
US:LTHM / Livent Corporation Chief Accounting Officer 0
US:NRG / NRG Energy, Inc. VP, Chief Accounting Officer 23,765
How to Interpret the Charts

The following charts show the stock performance of securities subsequent to each open-market, non-planned trade made by Ronald B Stark. 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 Ronald B Stark 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
2025-03-06 2025-03-06 4 ALTM Arcadium Lithium plc
Ordinary Shares
D - Sale to Issuer -58,052 0 -100.00
2025-03-06 2025-03-06 4 ALTM Arcadium Lithium plc
Ordinary Shares
D - Sale to Issuer -26,593 0 -100.00
2025-03-03 2025-02-28 4 ALTM Arcadium Lithium plc
Ordinary Shares
F - Taxes -2,745 84,644 -3.14 5.83 -16,003 493,475
2025-02-26 2025-02-24 4 ALTM Arcadium Lithium plc
Ordinary Shares
F - Taxes -710 87,389 -0.81 5.82 -4,132 508,604
2025-02-14 2025-02-12 4 ALTM Arcadium Lithium plc
Ordinary Shares
A - Award 38,861 88,099 78.92
2024-03-08 2024-03-06 4 ALTM Arcadium Lithium plc
Ordinary Shares
A - Award 22,728 49,238 85.73
2024-02-26 2024-02-22 4 ALTM Arcadium Lithium plc
Ordinary Shares
F - Taxes -137 26,510 -0.51 4.69 -643 124,332
2024-02-01 2024-01-30 4 ALTM Arcadium Lithium plc
Ordinary Shares
F - Taxes -4,674 26,647 -14.92 6.81 -31,830 181,466
2024-01-08 2024-01-04 4 LTHM Livent Corp.
Common Stock
D - Sale to Issuer -13,018 0 -100.00
2024-01-08 2024-01-04 4 ALTM Arcadium Lithium plc
Ordinary Shares
A - Award 19,270 31,321 159.90
2024-01-08 2024-01-04 4 ALTM Arcadium Lithium plc
Ordinary Shares
A - Award 12,051 12,051
2023-12-27 2023-12-22 4 LTHM Livent Corp.
Common Stock
F - Taxes -347 13,018 -2.60 16.44 -5,705 214,016
2023-12-27 2023-12-22 4 LTHM Livent Corp.
Common Stock
A - Award 1,119 13,365 9.14
2023-12-27 2023-12-22 4 LTHM Livent Corp.
Common Stock
F - Taxes -335 12,246 -2.66 16.44 -5,507 201,324
2023-12-27 2023-12-22 4 LTHM Livent Corp.
Common Stock
A - Award 1,081 12,581 9.40
2023-02-24 2023-02-22 4 LTHM Livent Corp.
Common Stock
A - Award 2,358 11,500 25.79
2022-10-12 2022-10-10 4 LTHM Livent Corp.
Common Stock
F - Taxes -717 9,142 -7.27 29.33 -21,030 268,135
2022-02-25 2022-02-23 4 LTHM Livent Corp.
Stock Option (Right to Buy)
A - Award 3,210 3,210
2022-02-25 2022-02-23 4 LTHM Livent Corp.
Common Stock
A - Award 2,142 9,859 27.76
2021-10-13 2021-10-11 4 LTHM Livent Corp.
Common Stock
F - Taxes -709 7,717 -8.41 23.09 -16,371 178,186
2021-02-25 2021-02-22 4 LTHM Livent Corp.
Stock Option (Right to Buy)
A - Award 12,185 12,185
2021-02-25 2021-02-22 4 LTHM Livent Corp.
Common Stock
A - Award 3,509 8,426 71.36
2019-03-01 3 LTHM Livent Corp.
Common Stock
9,648
2019-03-01 3 LTHM Livent Corp.
Common Stock
9,648
2019-03-01 3 LTHM Livent Corp.
Common Stock
9,648
2015-02-04 2015-02-02 4 NRG NRG ENERGY, INC.
Common Stock, par value $.01 per share
A - Award 90 23,765 0.38
2015-01-08 2015-01-03 4/A NRG NRG ENERGY, INC.
Common Stock, par value $.01 per share
F - Taxes -889 24,295 -3.53
2015-01-08 2015-01-02 4/A NRG NRG ENERGY, INC.
Non-Qualified Stock Options
M - Exercise -5,200 0 -100.00
2015-01-06 2015-01-03 4 NRG NRG ENERGY, INC.
Market Stock Units
M - Exercise -4,300 0 -100.00
2015-01-06 2015-01-03 4 NRG NRG ENERGY, INC.
Common Stock, par value $.01 per share
F - Taxes -620 23,675 -2.55
2015-01-06 2015-01-03 4 NRG NRG ENERGY, INC.
Common Stock, par value $.01 per share
F - Taxes -889 24,295 -3.53
2015-01-06 2015-01-03 4 NRG NRG ENERGY, INC.
Common Stock, par value $.01 per share
F - Taxes -2,065 25,184 -7.58
2015-01-06 2015-01-03 4 NRG NRG ENERGY, INC.
Common Stock, par value $.01 per share
M - Exercise 6,622 27,249 32.10
2015-01-06 2015-01-02 4 NRG NRG ENERGY, INC.
Non-Qualified Stock Options
M - Exercise -9,000 0 -100.00
2015-01-06 2015-01-02 4 NRG NRG ENERGY, INC.
Common Stock, par value $.01 per share
A - Award 5,337 20,627 34.91
2015-01-06 2015-01-02 4 NRG NRG ENERGY, INC.
Common Stock, par value $.01 per share
M - Exercise 461 15,290 3.11 23.64 10,898 361,456
2014-11-05 2014-11-03 4 NRG NRG ENERGY, INC.
Common Stock, par value $.01 per share
A - Award 55 14,829 0.37
2014-08-05 2014-08-01 4 NRG NRG ENERGY, INC.
Common Stock, par value $.01 per share
A - Award 54 14,774 0.37
2014-05-05 2014-05-01 4 NRG NRG ENERGY, INC.
Common Stock, par value $.01 per share
A - Award 49 14,720 0.33
2014-02-05 2014-02-03 4 NRG NRG ENERGY, INC.
Common Stock, par value $.01 per share
A - Award 51 14,671 0.35
2014-01-07 2014-01-03 4 NRG NRG ENERGY, INC.
Performance Units
M - Exercise -1,500 0 -100.00
2014-01-07 2014-01-03 4 NRG NRG ENERGY, INC.
Common Stock, par value .01 per share
F - Taxes -642 14,620 -4.21
2014-01-07 2014-01-03 4 NRG NRG ENERGY, INC.
Common Stock, par value .01 per share
F - Taxes -820 15,262 -5.10
2014-01-07 2014-01-03 4 NRG NRG ENERGY, INC.
Common Stock, par value .01 per share
M - Exercise 2,295 16,082 16.65
2014-01-06 2014-01-02 4 NRG NRG ENERGY, INC.
Common Stock, par value $.01 per share
A - Award 5,047 13,787 57.75
2013-11-05 2013-11-01 4 NRG NRG ENERGY, INC.
Common Stock, par value $.01 per share
A - Award 28 8,740 0.32
2013-08-05 2013-08-01 4 NRG NRG ENERGY, INC.
Common Stock, par value $.01 per share
A - Award 29 8,712 0.33
2013-01-08 2013-01-04 4 NRG NRG ENERGY, INC.
Common Stock, par value $.01 per share
F - Taxes -470 8,628 -5.17
2013-01-04 2013-01-02 4 NRG NRG ENERGY, INC.
Market Stock Units
A - Award 4,200 4,200
2013-01-04 2013-01-02 4 NRG NRG ENERGY, INC.
Common Stock, par value $.01 per share
A - Award 2,500 9,098 37.89
2012-03-13 3 NRG NRG ENERGY, INC.
Common Stock, par value $.01 per share
6,598
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)