Introduction

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

Security Title Latest Reported Holdings
Director 1,739
US:ROK / Rockwell Automation, Inc. Director 1,779
US:WDC / Western Digital Corporation EVP & GM, Flash Business 132,940
How to Interpret the Charts

The following charts show the stock performance of securities subsequent to each open-market, non-planned trade made by Robert Soderbery. 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 Robert Soderbery 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
2025-09-02 2025-08-28 4 NONE Stonepeak-Plus Infrastructure Fund LP
Class X Limited Partnership Units
A - Award 1,739 1,739
2024-12-06 2024-12-05 4 ROK ROCKWELL AUTOMATION, INC
Common Stock
A - Award 674 1,779 61.00
2024-12-02 2024-11-27 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -606 132,940 -0.45 71.50 -43,329 9,505,210
2024-11-26 2024-11-25 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -981 133,546 -0.73 69.42 -68,106 9,271,431
2024-11-22 2024-11-20 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -871 134,527 -0.64 63.84 -55,605 8,588,204
2024-10-30 2024-10-29 4 WDC WESTERN DIGITAL CORP
Common Stock
S - Sale -30,767 135,398 -18.52 68.01 -2,092,519 9,208,662
2024-09-23 2024-09-21 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -6,095 166,165 -3.54 66.75 -406,841 11,091,514
2024-08-27 2024-08-27 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -17,426 172,260 -9.19 62.85 -1,095,224 10,826,541
2024-08-27 2024-08-25 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -5,571 189,686 -2.85 64.35 -358,494 12,206,294
2024-08-22 2024-08-21 4 WDC WESTERN DIGITAL CORP
Common Stock
A - Award 34,599 195,257 21.54
2024-08-22 2024-08-21 4 WDC WESTERN DIGITAL CORP
Common Stock
A - Award 33,398 160,658 26.24
2024-08-22 2024-08-20 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -1,153 127,260 -0.90 64.42 -74,276 8,198,089
2024-08-07 2024-08-05 4 WDC WESTERN DIGITAL CORP
Common Stock
S - Sale -12,154 128,413 -8.65 57.09 -693,860 7,330,970
2024-06-17 2024-06-15 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -4,056 140,567 -2.80 78.12 -316,855 10,981,094
2024-06-06 2024-06-04 4 WDC WESTERN DIGITAL CORP
Common Stock
S - Sale -26,853 144,623 -15.66 73.48 -1,973,215 10,627,202
2024-05-28 2024-05-27 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -606 170,779 -0.35 74.81 -45,335 12,775,977
2024-05-22 2024-05-20 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -804 171,385 -0.47 73.05 -58,732 12,519,674
2024-02-29 2024-02-27 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -606 172,189 -0.35 57.48 -34,833 9,897,424
2024-02-22 2024-02-20 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -879 172,795 -0.51 54.13 -47,580 9,353,393
2023-11-28 2023-11-27 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -869 173,674 -0.50 47.21 -41,025 8,199,150
2023-11-21 2023-11-20 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -1,154 174,543 -0.66 47.35 -54,642 8,264,611
2023-11-06 2023-11-03 4 WDC WESTERN DIGITAL CORP
Common Stock
S - Sale -45,461 175,697 -20.56 43.11 -1,959,896 7,574,579
2023-11-06 2023-11-02 4 WDC WESTERN DIGITAL CORP
Common Stock
S - Sale -20,000 221,158 -8.29 42.49 -849,756 9,396,517
2023-09-22 2023-09-21 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -6,095 241,158 -2.47 44.44 -270,862 10,717,062
2023-09-06 2023-09-03 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -11,664 247,253 -4.50 45.96 -536,077 11,363,748
2023-08-29 2023-08-27 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -606 258,917 -0.23 39.49 -23,931 10,224,632
2023-08-29 2023-08-25 4 WDC WESTERN DIGITAL CORP
Common Stock
A - Award 44,948 259,523 20.95
2023-08-23 2023-08-22 4 WDC WESTERN DIGITAL CORP
Common Stock
A - Award 23,607 214,575 12.36
2023-08-22 2023-08-20 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -3,219 190,968 -1.66 39.74 -127,923 7,589,068
2023-06-16 2023-06-15 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -3,461 194,187 -1.75 41.08 -142,178 7,977,202
2023-05-30 2023-05-27 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -606 196,950 -0.31 39.71 -24,064 7,820,884
2023-03-01 2023-02-27 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -686 197,556 -0.35 38.51 -26,418 7,607,882
2022-12-12 2022-12-09 4 ROK ROCKWELL AUTOMATION, INC
Common Stock
A - Award 770 1,105 229.85
2022-11-29 2022-11-27 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -870 198,242 -0.44 37.34 -32,486 7,402,356
2022-09-23 2022-09-21 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -43,874 199,112 -18.06 34.78 -1,525,938 6,925,115
2022-08-30 2022-08-27 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -2,426 242,986 -0.99 45.49 -110,359 11,053,433
2022-08-23 2022-08-20 4 WDC WESTERN DIGITAL CORP
Common Stock
A - Award 37,235 245,412 17.89
2022-06-17 2022-06-15 4 WDC WESTERN DIGITAL CORP
Common Stock
A - Award 20,020 208,177 10.64
2022-02-03 3 ROK ROCKWELL AUTOMATION, INC
Common Stock
0
2022-02-03 2022-02-02 4 ROK ROCKWELL AUTOMATION, INC
Common Stock
A - Award 335 335
2021-09-23 2021-09-21 4 WDC WESTERN DIGITAL CORP
Common Stock
F - Taxes -42,252 187,393 -18.40 55.47 -2,343,718 10,394,690
2021-08-31 2021-08-27 4 WDC WESTERN DIGITAL CORP
Common Stock
A - Award 28,067 229,645 13.92
2020-09-23 2020-09-21 4 WDC WESTERN DIGITAL CORP
Common Stock
A - Award 201,578 201,578
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)