Gregory L Summe - Net Worth and Insider Trading

Gregory L Summe Net Worth

The estimated net worth of Gregory L Summe is at least $34 Million dollars as of 2026-09-11. Gregory L Summe is the Director of State Street Corp and owns about 100,023 shares of State Street Corp (STT) stock worth over $19 Million. Gregory L Summe is the Director of Avantor Inc and owns about 458,111 shares of Avantor Inc (AVTR) stock worth over $7 Million. Gregory L Summe is also the Director of Automatic Data Processing Inc and owns about 22,366 shares of Automatic Data Processing Inc (ADP) stock worth over $6 Million. Besides these, Gregory L Summe also holds NXP Semiconductors NV (NXPI) , LMI Aerospace Inc (LMIA) . Details can be seen in Gregory L Summe'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 Gregory L Summe has not made any transactions after 2026-02-12 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.

Transaction Summary of Gregory L Summe

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Gregory L Summe Insider Ownership Reports

Based on ownership reports from SEC filings, as the reporting owner, Gregory L Summe owns 15 companies in total, including NextGen Acquisition Corp (NGACU) , NXP Semiconductors NV (NXPI) , and State Street Corp (STT) among others .

Click here to see the complete history of Gregory L Summe’s form 4 insider trades.

Insider Ownership Summary of Gregory L Summe

Ticker Company Transaction Date Type of Owner
NGACU NextGen Acquisition Corp 2020-10-06 director
NXPI NXP Semiconductors NV 2024-02-28 director
STT State Street Corp 2025-02-18 director
LIMIT LIMIT 2026-02-12 director
LIMIT LIMIT 2017-06-27 director
LIMIT LIMIT 2016-03-30 10 percent owner
LIMIT LIMIT 2015-12-07 director
LIMIT LIMIT 2013-11-25 director
LIMIT LIMIT 2005-01-25 director & Chairman and CEO
LIMIT LIMIT 2020-10-06 director
LIMIT LIMIT 2021-03-22 director
LIMIT LIMIT 2021-03-22 director
LIMIT LIMIT 2024-06-21 director
LIMIT LIMIT 2024-08-07 director
LIMIT LIMIT 2021-03-22 director

Gregory L Summe Latest Holdings Summary

Gregory L Summe currently owns a total of 5 stocks. Among these stocks, Gregory L Summe owns 100,023 shares of State Street Corp (STT) as of February 18, 2025, with a value of $19 Million and a weighting of 57.26%. Gregory L Summe owns 458,111 shares of Avantor Inc (AVTR) as of February 12, 2026, with a value of $7 Million and a weighting of 20.02%. Gregory L Summe also owns 22,366 shares of Automatic Data Processing Inc (ADP) as of November 25, 2013, with a value of $6 Million and a weighting of 17.77%. The other 2 stocks NXP Semiconductors NV (NXPI) , LMI Aerospace Inc (LMIA) have a combined weighting of 4.95% among all his current holdings.

Latest Holdings of Gregory L Summe

Ticker Company Latest Transaction Date Shares Owned Current Price ($) Current Value ($)
STT State Street Corp 2025-02-18 100,023 193.29 19,333,446
AVTR Avantor Inc 2026-02-12 458,111 14.76 6,759,428
ADP Automatic Data Processing Inc 2013-11-25 22,366 268.22 5,998,897
NXPI NXP Semiconductors NV 2024-02-28 7,097 235.43 1,670,847
LMIA LMI Aerospace Inc 2017-06-27 0 13.99 0

Holding Weightings of Gregory L Summe


Gregory L Summe Form 4 Trading Tracker

According to the SEC Form 4 filings, Gregory L Summe has made a total of 1 transactions in State Street Corp (STT) over the past 5 years, including 0 buys and 1 sells. The most-recent trade in State Street Corp is the sale of 13,815 shares on February 18, 2025, which brought Gregory L Summe around $1 Million.

According to the SEC Form 4 filings, Gregory L Summe has made a total of 7 transactions in Avantor Inc (AVTR) over the past 5 years, including 7 buys and 0 sells. The most-recent trade in Avantor Inc is the acquisition of 100,000 shares on February 12, 2026, which cost Gregory L Summe around $940,000.

According to the SEC Form 4 filings, Gregory L Summe has made a total of 0 transactions in Automatic Data Processing Inc (ADP) over the past 5 years. The most-recent trade in Automatic Data Processing Inc is the sale of 15,000 shares on November 25, 2013, which brought Gregory L Summe around $1 Million.

More details on Gregory L Summe's insider transactions can be found in the Insider Trading History of Gregory L Summe table.

Insider Trading History of Gregory L Summe

* The information on this page (including Insider Trading Shares, Share Changes, Cost, etc.) is sourced exclusively from Form 4 filings and does not incorporate any data from 13F or 13D/G filings. As a result, it may differ from the values shown on the Guru page.

No transactions are available. GuruFocus only tracks and displays the purchase and sale of non-derivative security in open market or private transactions from SEC filings with the transaction code of P or S.
Total 0
  • 1
Only the transactions in Open Market or Private Sale at the market prices are included. Other transactions such as conversion of derivative security or exercise of options are not included. Insiders are limited to only officers and/or directors of the company.

Gregory L Summe Trading Performance

GuruFocus tracks the stock performance after each of Gregory L Summe's buying transactions within different timeframes. To be detailed, the average return of stocks after 3 months bought by Gregory L Summe is 1.71%. GuruFocus also compares Gregory L Summe's trading performance to market benchmark return within the same time period. The performance of stocks bought by Gregory L Summe within 3 months outperforms 2 times out of 10 transactions in total compared to the return of S&P 500 within the same period.

You can select different timeframes to see how Gregory L Summe's insider trading performs compared to the benchmark.

Please note GuruFocus will not track the insiders’ transaction performance if he/she does not have buying transactions.

Performance of Gregory L Summe

Average Return

LIMIT
Average return per transaction

Outperforming Transactions

LIMIT
2 out of 8 outperforming transactions.
Each transaction is measured over a period and compared to .
1 Month 3 Months 6 Months 1 Year 2 Years 3 Years
Return(%) 0.67 LIMIT LIMIT LIMIT LIMIT LIMIT
Relative Return to S&P 500(%) -2.03 LIMIT LIMIT LIMIT LIMIT LIMIT

Get the full picture on these stocks
See GF Score, valuation, financials, and warning signs for every stock Gregory L Summe owns.
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Gregory L Summe Ownership Network

Ownership Network List of Gregory L Summe

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Ownership Network Relation of Gregory L Summe

Insider Network Chart


Gregory L Summe Owned Company Details

What does NextGen Acquisition Corp do?

Who are the key executives at NextGen Acquisition Corp?

Gregory L Summe is the director of NextGen Acquisition Corp.

NextGen Acquisition Corp (NGACU) Insider Trades Summary

In summary, during the past 3 months, insiders sold 0 shares of NextGen Acquisition Corp (NGACU) in total and bought 0 shares, with a net sale of 0 shares. During the past 18 months, 0 shares of NextGen Acquisition Corp (NGACU) were sold and 0 shares were bought by its insiders, resulting in a net sale of 0 shares.

NextGen Acquisition Corp (NGACU)'s detailed insider trading history can be found in Insider Trading Tracker table.

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NextGen Acquisition Corp Insider Transactions

No Available Data

Gregory L Summe Mailing Address

Above is the net worth, insider trading, and ownership report for Gregory L Summe. Based on the public information released on the U.S. Securities and Exchange Commission (SEC) website, Gregory L Summe's mailing address is: Waltham Ma 02453.