Introduction

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

Security Title Latest Reported Holdings
US: / Apollo Global Management, Inc. Director 13,263
US:SPG / Simon Property Group, Inc. CEO/CHAIRMAN/PRESIDENT, Director 910,154
BR:A1PO34 / Apollo Global Management, Inc. - Depositary Receipt (Common Stock) Director 0
US:SPGS / Simon Property Group Acquisition Holdings Inc - Class A Director 8,550,000
US:WPG / Washington Prime Group Inc President, Director 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 Simon. 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 Simon 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
2025-07-02 2025-07-01 4 APO Apollo Global Management, Inc.
Common Stock
A - Award 1,446 13,263 12.24
2025-03-20 2025-03-18 4 SPG SIMON PROPERTY GROUP INC /DE/
Common Stock
M - Exercise 17,197 910,154 1.93
2024-07-03 2024-07-01 4 APO Apollo Global Management, Inc.
Common Stock
A - Award 1,699 11,817 16.79
2024-03-04 2024-03-01 4 SPG SIMON PROPERTY GROUP INC /DE/
Common Stock
M - Exercise 10,196 878,172 1.17
2024-01-03 2024-01-01 4 SPG SIMON PROPERTY GROUP INC /DE/
Common Stock
M - Exercise 23,172 867,976 2.74
2023-01-04 2023-01-01 4 SPG SIMON PROPERTY GROUP INC /DE/
Common Stock
M - Exercise 23,172 831,522 2.87
2022-03-18 2022-03-18 4 SPG SIMON PROPERTY GROUP INC /DE/
Restricted Stock Units
A - Award 17,197 17,197
2022-03-15 2022-03-11 4 SPG SIMON PROPERTY GROUP INC /DE/
LTIP Units
A - Award 23,724 907,364 2.68 0.25 5,931 226,841
2022-01-04 2022-01-01 4 SPG SIMON PROPERTY GROUP INC /DE/
Restricted Stock Units
M - Exercise -23,173 46,344 -33.33
2022-01-04 2022-01-01 4 SPG SIMON PROPERTY GROUP INC /DE/
Common Stock
M - Exercise 23,173 977,097 2.43
2022-01-03 2022-01-01 4 AAM Apollo Asset Management, Inc.
Class A Common Stock
D - Sale to Issuer -10,118 0 -100.00
2022-01-03 2022-01-01 4 APO Apollo Global Management, Inc.
Common Stock
A - Award 10,118 10,118
2021-08-20 2021-08-19 4 APO Apollo Global Management, Inc.
Class A Common Stock
A - Award 10,118 10,118
2021-03-30 2021-03-30 4 SPGS Simon Property Group Acquisition Holdings, Inc.
Class B common stock, par value $0.0001 per share
J - Other -8,550,000 8,550,000 -50.00
2021-03-03 2021-03-01 4 SPG SIMON PROPERTY GROUP INC /DE/
Restricted Stock Units
A - Award 10,196 10,196
2020-12-30 2020-12-28 4 SPG SIMON PROPERTY GROUP INC /DE/
Restricted Stock Units
A - Award 69,517 69,517
2020-03-17 2020-03-17 4 SPG SIMON PROPERTY GROUP INC /DE/
Common Stock
P - Purchase 150,000 953,924 18.66 60.83 9,124,050 58,024,335
2020-03-11 2020-03-09 4 SPG SIMON PROPERTY GROUP INC /DE/
LTIP Units
A - Award 12,005 883,640 1.38 0.25 3,001 220,910
2018-02-14 2018-02-12 4 SPG SIMON PROPERTY GROUP INC /DE/
CEO LTIP Units
A - Award 280,000 1,000,000 38.89 0.25 70,000 250,000
2017-03-02 2017-02-28 4 SPG SIMON PROPERTY GROUP INC /DE/
CEO LTIP Units
A - Award 360,000 720,000 100.00 0.25 90,000 180,000
2017-03-02 2017-02-28 4 SPG SIMON PROPERTY GROUP INC /DE/
LTIP Units
A - Award 43,751 871,635 5.28 0.25 10,938 217,909
2016-03-11 2016-03-01 4 SPG SIMON PROPERTY GROUP INC /DE/
LTIP Units
A - Award 188,054 827,884 29.39 0.25 47,014 206,971
2015-02-27 2015-02-26 4 SPG SIMON PROPERTY GROUP INC /DE/
LTIP Units
A - Award 137,555 639,830 27.39 0.25 34,389 159,958
2015-01-02 2015-01-01 4 SPG SIMON PROPERTY GROUP INC /DE/
LTIP Units
D - Sale to Issuer -280,000 0 -100.00 0.25 -70,000
2014-05-08 3 WPG Washington Prime Group Inc.
Common Stock, $.0001 par value
0
2014-02-27 2013-12-31 4 SPG SIMON PROPERTY GROUP INC /DE/
LTIP Units
D - Sale to Issuer -720,000 280,000 -72.00 0.25 -180,000 70,000
2014-02-27 2014-02-26 4 SPG SIMON PROPERTY GROUP INC /DE/
LTIP Units
A - Award 161,091 502,275 47.22 0.25 40,273 125,569
2013-02-27 2013-02-25 4 SPG SIMON PROPERTY GROUP INC /DE/
LTIP Units
A - Award 170,314 341,184 99.67 0.25 42,578 85,296
2012-03-07 2012-03-05 4 SPG SIMON PROPERTY GROUP INC /DE/
LTIP Units
A - Award 120,976 170,870 242.47 0.25 30,244 42,718
2012-01-03 2011-12-30 4 SPG SIMON PROPERTY GROUP INC /DE/
Common Stock
A - Award 6,857 636,037 1.09 130.57 895,336 83,048,941
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)