Insider · CIK 0001188184

CHANG DAVID C

Reports to the SEC for 3 companies · FREMONT, CA

sec.gov

Transactions

Companies

Filings

CIK

0001188184

Forms 4 and 5

Insider transactions

50 trades

Date	Company	Role	Code	Shares	Price	Value	Shares after
2026-06-15	AXTIAXT INCS Sale	Director	SSale	−8,333 sh	$111.17	−$926K	65,165
2026-06-04	AXTIAXT INCA Award	Director	AAward	+754 sh	—	—	73,498
2026-03-10	AXTIAXT INCS Sale	Director	SSale	−20K sh	$46.00	−$920K	72,744
2026-03-05	AXTIAXT INCS Sale	Director	SSale	−20K sh	$38.42	−$768K	92,744
2026-03-04	AXTIAXT INCS Sale	Director	SSale	−20K sh	$38.53	−$771K	112,744
2025-12-09	AXTIAXT INCS Sale	Director	SSale	−25K sh	$14.84	−$371K	132,744
2025-12-02	AXTIAXT INCS Sale	Director	SSale	−25K sh	$12.33	−$308K	157,744
2025-11-28	AXTIAXT INCS Sale	Director	SSale	−25K sh	$10.72	−$268K	182,744
2025-11-05	AXTIAXT INCS Sale	Director	SSale	−100K sh	$8.94	−$894K	207,744
2025-05-15	AXTIAXT INCA Award	Director	AAward	+55.2K sh	—	—	307,744
2024-05-16	AXTIAXT INCA Award	Director	AAward	+23.3K sh	—	—	252,572
2023-05-18	AXTIAXT INCA Award	Director	AAward	+23.3K sh	—	—	229,249
2022-05-19	AXTIAXT INCA Award	Director	AAward	+15.2K sh	—	—	205,926
2021-05-20	AXTIAXT INCA Award	Director	AAward	+6,726 sh	—	—	190,688
2020-05-28	AXTIAXT INCS Sale	Director	SSale	−12.8K sh	$5.48	−$70.1K	183,962
2020-05-21	AXTIAXT INCA Award	Director	AAward	+10.9K sh	—	—	196,762
2018-05-24	AXTIAXT INCA Award	Director	AAward	+7,594 sh	—	—	172,401
2018-05-23	AXTIAXT INCA Award	Director	AAward	+13.5K sh	—	—	185,853
2017-08-01	AXTIAXT INCS Sale	Director	SSale	−9,000 sh	$8.80	−$79.2K	164,807
2017-05-27	AXTIAXT INCA Award	Director	AAward	+8,823 sh	—	—	173,807
2016-05-26	AXTIAXT INCA Award	Director	AAward	+16.3K sh	—	—	164,984
2016-05-18	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCD Disposition to Issuer	Director	DDisposition to Issuer	−4,678 sh	—	—	0
2016-05-18	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCRestricted Stock UnitsD Disposition to Issuer	Director	DDisposition to Issuer	−17.5K sh	—	—	0
2016-05-18	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCDirector Deferred Stock UnitD Disposition to Issuer	Director	DDisposition to Issuer	−5,507.362 sh	—	—	0
2016-02-10	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCRestricted Stock UnitsA Award	Director	AAward	+830 sh	—	—	17,533.542
2016-01-08	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCDirector Deferred Stock UnitM Exercise/Conversion	Director	MExercise/Conversion	−603 sh	—	—	5,507.362
2016-01-08	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCM Exercise/Conversion	Director	MExercise/Conversion	+603 sh	—	—	4,678
2015-11-02	AXTIAXT INCA Award	Director	AAward	+13.8K sh	—	—	148,724
2015-07-08	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCM Exercise/Conversion	Director	MExercise/Conversion	+722 sh	—	—	4,075
2015-07-08	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCDirector Deferred Stock UnitM Exercise/Conversion	Director	MExercise/Conversion	−722 sh	—	—	6,110.362
2015-05-27	AXTIAXT INCA Award	Director	AAward	+12K sh	—	—	134,963
2015-02-13	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCM Exercise/Conversion	Director	MExercise/Conversion	+910 sh	—	—	3,353
2015-02-13	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCRestricted Stock UnitsM Exercise/Conversion	Director	MExercise/Conversion	−910 sh	—	—	16,703.542
2015-02-11	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCRestricted Stock UnitsA Award	Director	AAward	+1,058 sh	—	—	17,613.542
2014-02-14	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCM Exercise/Conversion	Director	MExercise/Conversion	+919 sh	—	—	2,443
2014-02-14	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCRestricted Stock UnitsM Exercise/Conversion	Director	MExercise/Conversion	−919 sh	—	—	16,555.542
2014-02-12	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCRestricted Stock UnitsA Award	Director	AAward	+1,120 sh	—	—	17,474.542
2013-05-14	AXTIAXT INCA Award	Director	AAward	+10.9K sh	—	—	109,250
2013-02-13	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCRestricted Stock UnitsA Award	Director	AAward	+1,583 sh	—	—	16,354.542
2013-02-12	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCM Exercise/Conversion	Director	MExercise/Conversion	+1,296 sh	—	—	1,524
2013-02-12	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCRestricted Stock UnitsM Exercise/Conversion	Director	MExercise/Conversion	−1,296 sh	—	—	14,771.542
2013-01-08	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCDirector Deferred Stock UnitA Award	Director	AAward	+435 sh	—	—	6,832.362
2012-07-09	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCDirector Deferred Stock UnitA Award	Director	AAward	+543 sh	—	—	6,397.362
2012-05-15	AXTIAXT INCA Award	Director	AAward	+7,692 sh	—	—	98,341
2012-02-16	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCRestricted Stock UnitsA Award	Director	AAward	+1,820 sh	—	—	16,067.542
2012-01-09	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCDirector Deferred Stock UnitA Award	Director	AAward	+700 sh	—	—	5,854.362
2011-07-08	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCDirector Deferred Stock UnitA Award	Director	AAward	+567 sh	—	—	5,154.362
2011-05-23	AXTIAXT INCA Award	Director	AAward	+4,137 sh	—	—	90,649
2011-02-17	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCRestricted Stock UnitsA Award	Director	AAward	+1,838 sh	—	—	14,247.542
2011-01-10	SPECTRUM MANAGEMENT HOLDING COMPANY, LLCDirector Deferred Stock UnitA Award	Director	AAward	+603 sh	—	—	4,587.362

Recent filings

Accepted (ET)
Jun 174
CHANG DAVID C0001437749-26-020894
SEC(opens sec.gov)
Jun 54
CHANG DAVID C0001437749-26-019723
SEC(opens sec.gov)
Mar 124
CHANG DAVID C0001437749-26-007898
SEC(opens sec.gov)
Mar 54
CHANG DAVID C0001437749-26-007098
SEC(opens sec.gov)
Dec 104
CHANG DAVID C0001437749-25-037434
SEC(opens sec.gov)
Dec 24
CHANG DAVID C0001437749-25-036693
SEC(opens sec.gov)
Nov 64
CHANG DAVID C0001437749-25-033659
SEC(opens sec.gov)
May 164
CHANG DAVID C0001415889-25-013458
SEC(opens sec.gov)
May 204
CHANG DAVID C0001415889-24-013689
SEC(opens sec.gov)
May 194
CHANG DAVID C0001415889-23-008432
SEC(opens sec.gov)
May 234
CHANG DAVID C0001415889-22-005475
SEC(opens sec.gov)
May 244
CHANG DAVID C0001179110-21-005828
SEC(opens sec.gov)
Jun 14
CHANG DAVID C0001179110-20-006741
SEC(opens sec.gov)
May 224
CHANG DAVID C0001179110-20-006548
SEC(opens sec.gov)
May 244
CHANG DAVID C0001179110-19-006625
SEC(opens sec.gov)
May 244
CHANG DAVID C0001179110-18-007495
SEC(opens sec.gov)
Aug 24
CHANG DAVID C0001179110-17-011004
SEC(opens sec.gov)
May 264
AXT INC0001179110-17-008159
SEC(opens sec.gov)

Companies

Address

4281 TECHNOLOGY DR.

FREMONT, CA, 94538