William C Martin - Net Worth and Insider Trading

William C Martin Net Worth

The estimated net worth of William C Martin is at least $253 Million dollars as of 2025-04-24. William C Martin is the Director, 10% Owner of Barnes & Noble Education Inc and owns about 11,144,143 shares of Barnes & Noble Education Inc (BNED) stock worth over $113 Million. William C Martin is the Director, 10% Owner of GulfMark Offshore Inc and owns about 2,199,568 shares of GulfMark Offshore Inc (GLF) stock worth over $62 Million. William C Martin is also the 10% Owner of MRV Communications Inc and owns about 2,136,864 shares of MRV Communications Inc (MRVC) stock worth over $21 Million. Besides these, William C Martin also holds Intermolecular Inc (IMI) , Resource America Inc (REXI) , Immersion Corp (IMMR) , Derma Sciences Inc (DSCI) , TheStreet Inc (TST) , SMG Industries Inc (SMGI) . Details can be seen in William C Martin'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 William C Martin has not made any transactions after 2025-03-20 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.

Transaction Summary of William C Martin

William C Martin Insider Ownership Reports

Based on ownership reports from SEC filings, as the reporting owner, William C Martin owns 15 companies in total, including Immersion Corp (IMMR) , Intermolecular Inc (IMI) , and Tidewater Inc (TDW) among others .

Click here to see the complete history of William C Martin’s form 4 insider trades.

Insider Ownership Summary of William C Martin

Ticker	Comapny	Transaction Date	Type of Owner
IMMR	Immersion Corp	2025-03-20	Chief Strategy Officer
IMI	Intermolecular Inc	2019-09-20	10 percent owner
TDW	Tidewater Inc	2018-11-15	director
		2018-11-15	director & 10 percent owner
		2017-12-15	other: See Explanation of Responses
		2017-12-05	10 percent owner
		2017-08-11	10 percent owner
		2016-11-04	10 percent owner
		2015-01-30	10 percent owner
		2012-01-05	director & 10 percent owner
		2013-05-30	10 percent owner
		2013-02-14	10 percent owner
		2011-03-09	10 percent owner
		2009-06-22	other: See Explanation of Responses
		2023-10-27	10 percent owner

William C Martin Latest Holdings Summary

William C Martin currently owns a total of 9 stocks. Among these stocks, William C Martin owns 11,144,143 shares of Barnes & Noble Education Inc (BNED) as of July 10, 2024, with a value of $113 Million and a weighting of 44.83%. William C Martin owns 2,199,568 shares of GulfMark Offshore Inc (GLF) as of December 21, 2017, with a value of $62 Million and a weighting of 24.68%. William C Martin also owns 2,136,864 shares of MRV Communications Inc (MRVC) as of June 24, 2015, with a value of $21 Million and a weighting of 8.43%. The other 6 stocks Intermolecular Inc (IMI) , Resource America Inc (REXI) , Immersion Corp (IMMR) , Derma Sciences Inc (DSCI) , TheStreet Inc (TST) , SMG Industries Inc (SMGI) have a combined weighting of 22.05% among all his current holdings.

Latest Holdings of William C Martin

Ticker	Comapny	Latest Transaction Date	Shares Owned	Current Price ($)	Current Value ($)
BNED	Barnes & Noble Education Inc	2024-07-10	11,144,143	10.17	113,335,934
GLF	GulfMark Offshore Inc	2017-12-21	2,199,568	28.37	62,401,744
MRVC	MRV Communications Inc	2015-06-24	2,136,864	9.98	21,315,218
IMI	Intermolecular Inc	2016-12-16	14,731,351	1.20	17,603,964
REXI	Resource America Inc	2013-02-14	1,710,741	9.78	16,731,047
IMMR	Immersion Corp	2025-03-20	1,450,693	7.00	10,154,851
DSCI	Derma Sciences Inc	2013-05-30	1,264,665	7.00	8,852,655
TST	TheStreet Inc	2013-01-30	372,714	6.44	2,400,278
SMGI	SMG Industries Inc	2012-01-05	3,974,370	0.00	4,372

Holding Weightings of William C Martin

William C Martin Form 4 Trading Tracker

According to the SEC Form 4 filings, William C Martin has made a total of 1 transactions in Barnes & Noble Education Inc (BNED) over the past 5 years, including 1 buys and 0 sells. The most-recent trade in Barnes & Noble Education Inc is the acquisition of 130,000 shares on July 10, 2024, which cost William C Martin around $921,700.

According to the SEC Form 4 filings, William C Martin has made a total of 0 transactions in GulfMark Offshore Inc (GLF) over the past 5 years. The most-recent trade in GulfMark Offshore Inc is the sale of 8,334 shares on December 21, 2017, which brought William C Martin around $158,346.

According to the SEC Form 4 filings, William C Martin has made a total of 0 transactions in MRV Communications Inc (MRVC) over the past 5 years. The most-recent trade in MRV Communications Inc is the acquisition of 601,200 shares on June 24, 2015, which cost William C Martin around $7 Million.

More details on William C Martin's insider transactions can be found in the Insider Trading History of William C Martin table.

Insider Trading History of William C Martin

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

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.

William C Martin Trading Performance

GuruFocus tracks the stock performance after each of William C Martin's buying transactions within different timeframes. To be detailed, the average return of stocks after 3 months bought by William C Martin is 8.59%. GuruFocus also compares William C Martin's trading performance to market benchmark return within the same time period. The performance of stocks bought by William C Martin within 3 months outperforms 24 times out of 36 transactions in total compared to the return of S&P 500 within the same period.

You can select different timeframes to see how William C Martin'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 William C Martin

Average Return

Average return per transaction

Outperforming Transactions

29 out of 34 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(%)	2.44
Relative Return to S&P 500(%)	2.68

William C Martin Ownership Network

Ownership Network List of William C Martin

No Data

Ownership Network Relation of William C Martin

William C Martin Owned Company Details

What does Immersion Corp do?

Who are the key executives at Immersion Corp?

William C Martin is the Chief Strategy Officer of Immersion Corp. Other key executives at Immersion Corp include 10 percent owner Eric Singer , Chief Financial Officer J Michael Dodson , and Chief Financial Officer Aaron Akerman .

Immersion Corp (IMMR) Insider Trades Summary

Over the past 18 months, William C Martin made 2 insider transaction in Immersion Corp (IMMR) with a net purchase of 47,150. Other recent insider transactions involving Immersion Corp (IMMR) include a net purchase of 97,638 shares made by Eric Singer , a net sale of 13,000 shares made by Elias Nader , and a net sale of 4,947 shares made by J Michael Dodson .

In summary, during the past 3 months, insiders sold 0 shares of Immersion Corp (IMMR) in total and bought 74,788 shares, with a net purchase of 74,788 shares. During the past 18 months, 17,947 shares of Immersion Corp (IMMR) were sold and 145,943 shares were bought by its insiders, resulting in a net purchase of 127,996 shares.

Immersion Corp (IMMR)'s detailed insider trading history can be found in Insider Trading Tracker table.

Immersion Corp Insider Transactions

No Available Data

What does Intermolecular Inc do?

Who are the key executives at Intermolecular Inc?

William C Martin is the 10 percent owner of Intermolecular Inc. Other key executives at Intermolecular Inc include Chief Financial Officer Bill Roeschlein , 10 percent owner Raging Capital Management, Llc , and director & President and CEO Christian Kramer .

Intermolecular Inc (IMI) Insider Trades Summary

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

Intermolecular Inc (IMI)'s detailed insider trading history can be found in Insider Trading Tracker table.

Intermolecular Inc Insider Transactions

No Available Data

What does Tidewater Inc do?

Who are the key executives at Tidewater Inc?

William C Martin is the director of Tidewater Inc. Other key executives at Tidewater Inc include director & Director & President & CEO Quintin Kneen , EVP & General Counsel Daniel A. Hudson , and EVP & CFO & CAO Samuel R Rubio .

Tidewater Inc (TDW) Insider Trades Summary

Over the past 18 months, William C Martin made no insider transaction in Tidewater Inc (TDW). Other recent insider transactions involving Tidewater Inc (TDW) include a net sale of 808,004 shares made by Robert Robotti , a net sale of 475,479 shares made by Quintin Kneen , and a net sale of 44,037 shares made by Samuel R Rubio .

In summary, during the past 3 months, insiders sold 0 shares of Tidewater Inc (TDW) in total and bought 26,770 shares, with a net purchase of 26,770 shares. During the past 18 months, 1,538,483 shares of Tidewater Inc (TDW) were sold and 91,599 shares were bought by its insiders, resulting in a net sale of 1,446,884 shares.

Tidewater Inc (TDW)'s detailed insider trading history can be found in Insider Trading Tracker table.

Tidewater Inc Insider Transactions

No Available Data

What does GulfMark Offshore Inc do?

Who are the key executives at GulfMark Offshore Inc?

William C Martin is the director & 10 percent owner of GulfMark Offshore Inc. Other key executives at GulfMark Offshore Inc include director & 10 percent owner Raging Capital Management, Llc , director & other: See Remarks Kenneth H Traub , and director & 10 percent owner Geoffrey Raynor .

GulfMark Offshore Inc (GLF) Insider Trades Summary

In summary, during the past 3 months, insiders sold 0 shares of GulfMark Offshore Inc (GLF) in total and bought 0 shares, with a net sale of 0 shares. During the past 18 months, 0 shares of GulfMark Offshore Inc (GLF) were sold and 0 shares were bought by its insiders, resulting in a net sale of 0 shares.

GulfMark Offshore Inc (GLF)'s detailed insider trading history can be found in Insider Trading Tracker table.

GulfMark Offshore Inc Insider Transactions

No Available Data

What does DSP Group Inc do?

Who are the key executives at DSP Group Inc?

William C Martin is the other: See Explanation of Responses of DSP Group Inc. Other key executives at DSP Group Inc include Chief Business Officer Tali Chen , VP and CFO Dror Levy , and director & CEO Ofer Elyakim .

DSP Group Inc (DSPG) Insider Trades Summary

In summary, during the past 3 months, insiders sold 0 shares of DSP Group Inc (DSPG) in total and bought 0 shares, with a net sale of 0 shares. During the past 18 months, 0 shares of DSP Group Inc (DSPG) were sold and 0 shares were bought by its insiders, resulting in a net sale of 0 shares.

DSP Group Inc (DSPG)'s detailed insider trading history can be found in Insider Trading Tracker table.

DSP Group Inc Insider Transactions

No Available Data

What does Rentech Inc do?

Who are the key executives at Rentech Inc?

William C Martin is the 10 percent owner of Rentech Inc. Other key executives at Rentech Inc include 10 percent owner Raging Capital Management, Llc , director & President & CEO Keith B Forman , and 10 percent owner Bennett J Goodman .

Rentech Inc (RTKHQ) Insider Trades Summary

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

Rentech Inc (RTKHQ)'s detailed insider trading history can be found in Insider Trading Tracker table.

Rentech Inc Insider Transactions

No Available Data

What does MRV Communications Inc do?

Who are the key executives at MRV Communications Inc?

William C Martin is the 10 percent owner of MRV Communications Inc. Other key executives at MRV Communications Inc include director & President & CEO Mark J Bonney , 10 percent owner Raging Capital Management, Llc , and other: no longer 10% holder Miller Lloyd I Iii .

MRV Communications Inc (MRVC) Insider Trades Summary

In summary, during the past 3 months, insiders sold 0 shares of MRV Communications Inc (MRVC) in total and bought 0 shares, with a net sale of 0 shares. During the past 18 months, 0 shares of MRV Communications Inc (MRVC) were sold and 0 shares were bought by its insiders, resulting in a net sale of 0 shares.

MRV Communications Inc (MRVC)'s detailed insider trading history can be found in Insider Trading Tracker table.

MRV Communications Inc Insider Transactions

No Available Data

What does A.M. Castle & Co do?

Who are the key executives at A.M. Castle & Co?

William C Martin is the 10 percent owner of A.M. Castle & Co. Other key executives at A.M. Castle & Co include director & 10 percent owner Jonathan Mellin , EVP & Global Supply & Aerospace Mark D Zundel , and 10 percent owner Whitebox Advisors Llc .

A.M. Castle & Co (CTAM) Insider Trades Summary

In summary, during the past 3 months, insiders sold 0 shares of A.M. Castle & Co (CTAM) in total and bought 0 shares, with a net sale of 0 shares. During the past 18 months, 0 shares of A.M. Castle & Co (CTAM) were sold and 0 shares were bought by its insiders, resulting in a net sale of 0 shares.

A.M. Castle & Co (CTAM)'s detailed insider trading history can be found in Insider Trading Tracker table.

A.M. Castle & Co Insider Transactions

No Available Data

What does Standard Register Co do?

Who are the key executives at Standard Register Co?

William C Martin is the 10 percent owner of Standard Register Co. Other key executives at Standard Register Co include 10 percent owner Raging Capital Management, Llc , 10 percent owner Raging Capital Master Fund, Ltd. , and 10 percent owner Edward A Mule .

Standard Register Co (SRCTQ) Insider Trades Summary

In summary, during the past 3 months, insiders sold 0 shares of Standard Register Co (SRCTQ) in total and bought 0 shares, with a net sale of 0 shares. During the past 18 months, 0 shares of Standard Register Co (SRCTQ) were sold and 0 shares were bought by its insiders, resulting in a net sale of 0 shares.

Standard Register Co (SRCTQ)'s detailed insider trading history can be found in Insider Trading Tracker table.

Standard Register Co Insider Transactions

No Available Data

What does SMG Industries Inc do?

Who are the key executives at SMG Industries Inc?

William C Martin is the director & 10 percent owner of SMG Industries Inc. Other key executives at SMG Industries Inc include director & Chief Financial Officer Timothy W Barnhart , director & Chief Executive Officer Bryan S Barnhart , and director & 10 percent owner Wilson Newton W Iii .

SMG Industries Inc (SMGI) Insider Trades Summary

In summary, during the past 3 months, insiders sold 0 shares of SMG Industries Inc (SMGI) in total and bought 0 shares, with a net sale of 0 shares. During the past 18 months, 0 shares of SMG Industries Inc (SMGI) were sold and 0 shares were bought by its insiders, resulting in a net sale of 0 shares.

SMG Industries Inc (SMGI)'s detailed insider trading history can be found in Insider Trading Tracker table.

SMG Industries Inc Insider Transactions

No Available Data

What does Derma Sciences Inc do?

Who are the key executives at Derma Sciences Inc?

William C Martin is the 10 percent owner of Derma Sciences Inc. Other key executives at Derma Sciences Inc include director & other: Executive Chairman Stephen T Wills , other: Former Director Bruce F Wesson , and other: Former Director Amy S Paul .

Derma Sciences Inc (DSCI) Insider Trades Summary

In summary, during the past 3 months, insiders sold 0 shares of Derma Sciences Inc (DSCI) in total and bought 0 shares, with a net sale of 0 shares. During the past 18 months, 0 shares of Derma Sciences Inc (DSCI) were sold and 0 shares were bought by its insiders, resulting in a net sale of 0 shares.

Derma Sciences Inc (DSCI)'s detailed insider trading history can be found in Insider Trading Tracker table.

Derma Sciences Inc Insider Transactions

No Available Data

What does Resource America Inc do?

Who are the key executives at Resource America Inc?

William C Martin is the 10 percent owner of Resource America Inc. Other key executives at Resource America Inc include director & CEO & President Jonathan Z Cohen , SVP & CFO Thomas C Elliott , and Senior Vice President Jeffrey D Blomstrom .

Resource America Inc (REXI) Insider Trades Summary

In summary, during the past 3 months, insiders sold 0 shares of Resource America Inc (REXI) in total and bought 0 shares, with a net sale of 0 shares. During the past 18 months, 0 shares of Resource America Inc (REXI) were sold and 0 shares were bought by its insiders, resulting in a net sale of 0 shares.

Resource America Inc (REXI)'s detailed insider trading history can be found in Insider Trading Tracker table.

Resource America Inc Insider Transactions

No Available Data

What does IDW Media Holdings Inc do?

Who are the key executives at IDW Media Holdings Inc?

William C Martin is the 10 percent owner of IDW Media Holdings Inc. Other key executives at IDW Media Holdings Inc include Chief Operating Officer Amber Huerta , director & Executive Chairman Davidi Jonas , and director & VICE CHAIRMAN Sanford R Climan .

IDW Media Holdings Inc (IDWM) Insider Trades Summary

In summary, during the past 3 months, insiders sold 0 shares of IDW Media Holdings Inc (IDWM) in total and bought 0 shares, with a net sale of 0 shares. During the past 18 months, 0 shares of IDW Media Holdings Inc (IDWM) were sold and 0 shares were bought by its insiders, resulting in a net sale of 0 shares.

IDW Media Holdings Inc (IDWM)'s detailed insider trading history can be found in Insider Trading Tracker table.

IDW Media Holdings Inc Insider Transactions

No Available Data

What does AutoWeb Inc do?

Who are the key executives at AutoWeb Inc?

William C Martin is the other: See Explanation of Responses of AutoWeb Inc. Other key executives at AutoWeb Inc include director & President and CEO Jared Robert Rowe , EVP & CLO & Secretary Glenn Evan Fuller , and Chief Human Resources Officer Sara E Partin .

AutoWeb Inc (AUTO) Insider Trades Summary

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

AutoWeb Inc (AUTO)'s detailed insider trading history can be found in Insider Trading Tracker table.

AutoWeb Inc Insider Transactions

No Available Data

What does Universal Electronics Inc do?

Who are the key executives at Universal Electronics Inc?

William C Martin is the 10 percent owner of Universal Electronics Inc. Other key executives at Universal Electronics Inc include director & CEO Paul D Arling , 10 percent owner Toro 18 Holdings Llc , and 10 percent owner Immersion Corp .

Universal Electronics Inc (UEIC) Insider Trades Summary

Over the past 18 months, William C Martin made no insider transaction in Universal Electronics Inc (UEIC). Other recent insider transactions involving Universal Electronics Inc (UEIC) include a net purchase of 254,546 shares made by Toro 18 Holdings Llc , a net sale of 26,005 shares made by Paul D Arling , and a net sale of 2,500 shares made by Edward K Zinser .

In summary, during the past 3 months, insiders sold 0 shares of Universal Electronics Inc (UEIC) in total and bought 0 shares, with a net sale of 0 shares. During the past 18 months, 28,505 shares of Universal Electronics Inc (UEIC) were sold and 254,546 shares were bought by its insiders, resulting in a net purchase of 226,041 shares.

Universal Electronics Inc (UEIC)'s detailed insider trading history can be found in Insider Trading Tracker table.

Universal Electronics Inc Insider Transactions

No Available Data

William C Martin Mailing Address

Above is the net worth, insider trading, and ownership report for William C Martin. Based on the public information released on the U.S. Securities and Exchange Commission (SEC) website, William C Martin's mailing address is: Rocky Hill Nj 08553.

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