CHANG DAVID C

CIK 00011881843 companiesFREMONT, CA

SEC Profile

Transactions

Companies

Filings

CIK

0001188184

Recent Transactions

50 trades

Sale
AXT INC$AXTI
Common Stock
2025-12-09$14.84/sh−25,000→ 132,744 total
Sale
AXT INC$AXTI
Common Stock
2025-12-02$12.33/sh−25,000→ 157,744 total
Sale
AXT INC$AXTI
Common Stock
2025-11-28$10.72/sh−25,000→ 182,744 total
Sale
AXT INC$AXTI
Common Stock
2025-11-05$8.94/sh−100,000→ 207,744 total
Award
AXT INC$AXTI
Common Stock
2025-05-15+55,172→ 307,744 total
Award
AXT INC$AXTI
Common Stock
2024-05-16+23,323→ 252,572 total
Award
AXT INC$AXTI
Common Stock
2023-05-18+23,323→ 229,249 total
Award
AXT INC$AXTI
Common Stock
2022-05-19+15,238→ 205,926 total
Award
AXT INC$AXTI
Common Stock
2021-05-20+6,726→ 190,688 total
Sale
AXT INC$AXTI
Common Stock
2020-05-28$5.48/sh−12,800→ 183,962 total
Award
AXT INC$AXTI
Common Stock
2020-05-21+10,909→ 196,762 total
Award
AXT INC$AXTI
Common Stock
2018-05-24+7,594→ 172,401 total
Award
AXT INC$AXTI
Common Stock
2018-05-23+13,452→ 185,853 total
Sale
AXT INC$AXTI
Common Stock
2017-08-01$8.80/sh−9,000→ 164,807 total
Award
AXT INC$AXTI
Common Stock
2017-05-27+8,823→ 173,807 total
Award
AXT INC$AXTI
Common Stock
2016-05-26+16,260→ 164,984 total
Disposition to Issuer
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Common Stock, par value $.01 per share
2016-05-18−4,678→ 0 total
Disposition to Issuer
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Director Deferred Stock Unit
2016-05-18−5,507.362→ 0 total
Disposition to Issuer
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Restricted Stock Units
2016-05-18−17,533.542→ 0 total
Award
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Restricted Stock Units
2016-02-10+830→ 17,533.542 total
Exercise/Conversion
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Director Deferred Stock Unit
2016-01-08−603→ 5,507.362 total
Exercise/Conversion
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Common Stock, par value $.01 per share
2016-01-08+603→ 4,678 total
Award
AXT INC$AXTI
Common Stock
2015-11-02+13,761→ 148,724 total
Exercise/Conversion
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Director Deferred Stock Unit
2015-07-08−722→ 6,110.362 total
Exercise/Conversion
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Common Stock, par value $.01 per share
2015-07-08+722→ 4,075 total
Award
AXT INC$AXTI
Common Stock
2015-05-27+11,952→ 134,963 total
Exercise/Conversion
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Restricted Stock Units
2015-02-13−910→ 16,703.542 total
Exercise/Conversion
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Common Stock, par value $.01 per share
2015-02-13+910→ 3,353 total
Award
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Restricted Stock Units
2015-02-11+1,058→ 17,613.542 total
Exercise/Conversion
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Common Stock, par value $.01 per share
2014-02-14+919→ 2,443 total
Exercise/Conversion
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Restricted Stock Units
2014-02-14−919→ 16,555.542 total
Award
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Restricted Stock Units
2014-02-12+1,120→ 17,474.542 total
Award
AXT INC$AXTI
Common Stock
2013-05-14+10,909→ 109,250 total
Award
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Restricted Stock Units
2013-02-13+1,583→ 16,354.542 total
Exercise/Conversion
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Common Stock, par value $.01 per share
2013-02-12+1,296→ 1,524 total
Exercise/Conversion
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Restricted Stock Units
2013-02-12−1,296→ 14,771.542 total
Award
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Director Deferred Stock Unit
2013-01-08+435→ 6,832.362 total
Award
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Director Deferred Stock Unit
2012-07-09+543→ 6,397.362 total
Award
AXT INC$AXTI
Common Stock
2012-05-15+7,692→ 98,341 total
Award
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Restricted Stock Units
2012-02-16+1,820→ 16,067.542 total
Award
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Director Deferred Stock Unit
2012-01-09+700→ 5,854.362 total
Award
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Director Deferred Stock Unit
2011-07-08+567→ 5,154.362 total
Award
AXT INC$AXTI
Common Stock
2011-05-23+4,137→ 90,649 total
Award
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Restricted Stock Units
2011-02-17+1,838→ 14,247.542 total
Award
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Director Deferred Stock Unit
2011-01-10+603→ 4,587.362 total
Sale
AXT INC$AXTI
Common Stock
2010-11-23$8.15/sh−56,600→ 28,312 total
Sale
AXT INC$AXTI
Common Stock
2010-11-23$8.20/sh−1,400→ 84,912 total
Purchase
AXT INC$AXTI
Common stock
2010-08-31$5.15/sh+3,000→ 86,312 total
Purchase
AXT INC$AXTI
Common stock
2010-08-23$5.49/sh+3,000→ 83,512 total
Award
SPECTRUM MANAGEMENT HOLDING COMPANY, LLC
Director Deferred Stock Unit
2010-07-08+722→ 3,984.362 total

CHANG DAVID C

Recent Transactions

Companies

Recent Filings

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