Ivan G Seidenberg - Net Worth and Insider Trading
Ivan G Seidenberg Net Worth
The estimated net worth of Ivan G Seidenberg is at least $6 Million dollars as of 2025-05-05. Ivan G Seidenberg is the Director of BlackRock Inc and owns about 6,233 shares of BlackRock Inc (BLK) stock worth over $6 Million. Ivan G Seidenberg is also the Director of BXP Inc and owns about 7,123 shares of BXP Inc (BXP) stock worth over $464,705. Details can be seen in Ivan G Seidenberg's Latest Holdings Summary section.
Disclaimer: The insider information is derived from SEC filings. The estimated net worth is based on the final shares held after open market or private purchases and sales of common stock with a transaction code of "P" or "S" on Form 4, assuming that Ivan G Seidenberg has not made any transactions after 2014-05-20 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.

Transaction Summary of Ivan G Seidenberg
Ivan G Seidenberg Insider Ownership Reports
Based on ownership reports from SEC filings, as the reporting owner, Ivan G Seidenberg owns 7 companies in total, including Madison Square Garden Sports Corp (MSGS) , BlackRock Inc (BLK) , and BXP Inc (BXP) among others .
Click here to see the complete history of Ivan G Seidenberg’s form 4 insider trades.
Insider Ownership Summary of Ivan G Seidenberg
Ticker | Company | Transaction Date | Type of Owner |
---|---|---|---|
MSGS | Madison Square Garden Sports Corp | 2020-04-17 | director |
BLK | BlackRock Inc | 2012-12-31 | director |
BXP | BXP Inc | 2014-05-20 | director |
![]() | ![]() | 2003-05-09 | director & President and CEO |
![]() | ![]() | 2003-07-01 | director |
![]() | ![]() | 2003-07-01 | director |
![]() | ![]() | 2021-06-24 | director |
Ivan G Seidenberg Latest Holdings Summary
Ivan G Seidenberg currently owns a total of 2 stocks. Among these stocks, Ivan G Seidenberg owns 6,233 shares of BlackRock Inc (BLK) as of January 20, 2011, with a value of $6 Million and a weighting of 92.58%. Ivan G Seidenberg also owns 7,123 shares of BXP Inc (BXP) as of May 20, 2014, with a value of $464,705 and a weighting of 7.42%.
Latest Holdings of Ivan G Seidenberg
Ticker | Company | Latest Transaction Date | Shares Owned | Current Price ($) | Current Value ($) |
---|---|---|---|---|---|
BLK | BlackRock Inc | 2011-01-20 | 6,233 | 930.54 | 5,800,025 |
BXP | BXP Inc | 2014-05-20 | 7,123 | 65.24 | 464,705 |
Holding Weightings of Ivan G Seidenberg
Ivan G Seidenberg Form 4 Trading Tracker
According to the SEC Form 4 filings, Ivan G Seidenberg has made a total of 0 transactions in BlackRock Inc (BLK) over the past 5 years. The most-recent trade in BlackRock Inc is the sale of 0 shares on January 20, 2011, which brought Ivan G Seidenberg around $0.
According to the SEC Form 4 filings, Ivan G Seidenberg has made a total of 0 transactions in BXP Inc (BXP) over the past 5 years. The most-recent trade in BXP Inc is the sale of 0 shares on May 20, 2014, which brought Ivan G Seidenberg around $0.
Insider Trading History of Ivan G Seidenberg
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Ivan G Seidenberg Trading Performance
Ivan G Seidenberg Ownership Network
Ownership Network List of Ivan G Seidenberg
Ownership Network Relation of Ivan G Seidenberg

Ivan G Seidenberg Owned Company Details
What does Madison Square Garden Sports Corp do?
Who are the key executives at Madison Square Garden Sports Corp?
Ivan G Seidenberg is the director of Madison Square Garden Sports Corp. Other key executives at Madison Square Garden Sports Corp include director & Executive Chairman & other: Member of 13(d) Group James Lawrence Dolan , other: Member of 13D Group Charles F. Dolan 2009 Revocable Trust , and SVP & Controller & PAO Alexander Shvartsman .
Madison Square Garden Sports Corp (MSGS) Insider Trades Summary
Over the past 18 months, Ivan G Seidenberg made no insider transaction in Madison Square Garden Sports Corp (MSGS). Other recent insider transactions involving Madison Square Garden Sports Corp (MSGS) include a net sale of 81,412 shares made by James Lawrence Dolan , a net sale of 36,922 shares made by Charles F. Dolan 2009 Revocable Trust , and a net sale of 937 shares made by David G. Hopkinson .
In summary, during the past 3 months, insiders sold 52,466 shares of Madison Square Garden Sports Corp (MSGS) in total and bought 0 shares, with a net sale of 52,466 shares. During the past 18 months, 119,991 shares of Madison Square Garden Sports Corp (MSGS) were sold and 0 shares were bought by its insiders, resulting in a net sale of 119,991 shares.
Madison Square Garden Sports Corp (MSGS)'s detailed insider trading history can be found in Insider Trading Tracker table.
Madison Square Garden Sports Corp Insider Transactions
Ivan G Seidenberg Mailing Address
Above is the net worth, insider trading, and ownership report for Ivan G Seidenberg. Based on the public information released on the U.S. Securities and Exchange Commission (SEC) website, Ivan G Seidenberg's mailing address is: New York Ny 10007.