Introduction

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

Security Title Latest Reported Holdings
US:AJG / Arthur J. Gallagher & Co. Director 15,234
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 John Coldman. 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 John Coldman 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
2025-05-15 2025-05-13 4 AJG Arthur J. Gallagher & Co.
Common Stock
A - Award 690 15,234 4.74
2024-05-13 2024-05-09 4 AJG Arthur J. Gallagher & Co.
Common Stock
M - Exercise 920 13,694 7.20
2024-05-13 2024-05-09 4 AJG Arthur J. Gallagher & Co.
Common Stock (restricted)
M - Exercise -920 850 -51.98
2024-05-09 2024-05-07 4 AJG Arthur J. Gallagher & Co.
Common Stock (restricted)
A - Award 850 1,770 92.39
2023-05-11 2023-05-10 4 AJG Arthur J. Gallagher & Co.
Common Stock
M - Exercise 1,030 12,774 8.77
2023-05-11 2023-05-10 4 AJG Arthur J. Gallagher & Co.
Common Stock (restricted)
M - Exercise -1,030 920 -52.82
2023-05-11 2023-05-09 4 AJG Arthur J. Gallagher & Co.
Common Stock (restricted)
A - Award 920 1,950 89.32
2022-05-13 2022-05-11 4 AJG Arthur J. Gallagher & Co.
Common Stock (restricted)
A - Award 1,030 2,180 89.57
2022-05-13 2022-05-11 4 AJG Arthur J. Gallagher & Co.
Common Stock
M - Exercise 1,150 11,744 10.86
2022-05-13 2022-05-11 4 AJG Arthur J. Gallagher & Co.
Common Stock (restricted)
M - Exercise -1,150 1,030 -52.75
2021-05-13 2021-05-12 4 AJG Arthur J. Gallagher & Co.
Common Stock
F - Taxes -558 10,594 -5.00 143.86 -80,274 1,524,053
2021-05-13 2021-05-12 4 AJG Arthur J. Gallagher & Co.
Common Stock
M - Exercise 1,860 11,152 20.02
2021-05-13 2021-05-12 4 AJG Arthur J. Gallagher & Co.
Common Stock (restricted)
M - Exercise -1,860 1,150 -61.79
2021-05-13 2021-05-11 4 AJG Arthur J. Gallagher & Co.
Common Stock (restricted)
A - Award 1,150 3,010 61.83
2020-05-14 2020-05-14 4 AJG Arthur J. Gallagher & Co.
Common Stock
F - Taxes -555 9,292 -5.64 86.49 -48,002 803,665
2020-05-14 2020-05-14 4 AJG Arthur J. Gallagher & Co.
Common Stock
M - Exercise 1,850 9,847 23.13
2020-05-14 2020-05-14 4 AJG Arthur J. Gallagher & Co.
Common Stock (restricted)
M - Exercise -1,850 1,860 -49.87
2020-05-14 2020-05-12 4 AJG Arthur J. Gallagher & Co.
Common Stock (restricted)
A - Award 1,860 3,710 100.54
2019-05-16 2019-05-15 4 AJG GALLAGHER ARTHUR J & CO
Common Stock
F - Taxes -630 7,997 -7.30 82.71 -52,107 661,432
2019-05-15 2019-05-15 4 AJG GALLAGHER ARTHUR J & CO
Common Stock
M - Exercise 2,100 8,627 32.17
2019-05-15 2019-05-15 4 AJG GALLAGHER ARTHUR J & CO
Common Stock (restricted)
M - Exercise -2,100 1,850 -53.16
2019-05-15 2019-05-14 4 AJG GALLAGHER ARTHUR J & CO
Common Stock (restricted)
A - Award 1,850 3,950 88.10
2018-05-17 2018-05-16 4 AJG GALLAGHER ARTHUR J & CO
Common Stock
F - Taxes -720 6,527 -9.94 66.62 -47,966 434,829
2018-05-17 2018-05-16 4 AJG GALLAGHER ARTHUR J & CO
Common Stock
M - Exercise 2,400 7,247 49.52
2018-05-17 2018-05-16 4 AJG GALLAGHER ARTHUR J & CO
Common Stock (restricted)
M - Exercise -2,400 2,100 -53.33
2018-05-17 2018-05-15 4 AJG GALLAGHER ARTHUR J & CO
Common Stock (restricted)
A - Award 2,100 4,500 87.50
2017-05-18 2017-05-17 4 AJG GALLAGHER ARTHUR J & CO
Common Stock
F - Taxes -885 4,847 -15.44 54.96 -48,640 266,391
2017-05-18 2017-05-17 4 AJG GALLAGHER ARTHUR J & CO
Common Stock
M - Exercise 2,950 5,732 106.04
2017-05-18 2017-05-17 4 AJG GALLAGHER ARTHUR J & CO
Common Stock (restricted)
M - Exercise -2,950 2,400 -55.14
2017-05-18 2017-05-16 4 AJG GALLAGHER ARTHUR J & CO
Common Stock (restricted)
A - Award 2,400 5,350 81.36
2016-06-02 2016-06-01 4 AJG GALLAGHER ARTHUR J & CO
Common Stock
F - Taxes -780 2,782 -21.90 47.90 -37,362 133,258
2016-06-02 2016-06-01 4 AJG GALLAGHER ARTHUR J & CO
Common Stock
M - Exercise 2,600 3,562 270.27 47.90 124,540 170,620
2016-06-02 2016-06-01 4 AJG GALLAGHER ARTHUR J & CO
Common Stock (restricted)
M - Exercise -2,600 2,950 -46.85 47.90 -124,540 141,305
2016-05-17 2016-05-17 4 AJG GALLAGHER ARTHUR J & CO
Common Stock (restricted)
A - Award 2,950 5,550 113.46
2016-02-12 2016-02-10 4 AJG GALLAGHER ARTHUR J & CO
Common Stock
F - Taxes -413 962 -30.04 38.00 -15,694 36,556
2016-02-12 2016-02-10 4 AJG GALLAGHER ARTHUR J & CO
Common Stock
M - Exercise 1,375 1,375 38.00 52,250 52,250
2016-02-12 2016-02-10 4 AJG GALLAGHER ARTHUR J & CO
Common Stock (restricted)
M - Exercise -1,375 2,600 -34.59 38.00 -52,250 98,800
2015-06-02 2015-06-01 4 AJG GALLAGHER ARTHUR J & CO
Common Stock (restricted)
A - Award 2,600 3,975 189.09
2015-02-12 2015-02-10 4 AJG GALLAGHER ARTHUR J & CO
Common Stock (restricted)
A - Award 1,375 1,375
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)