Insider · CIK 0001369133

Cysewski Gerald R

Reports to the SEC for 1 company · KAILUA- KONA, HI

sec.gov

Transactions

Companies

Filings

CIK

0001369133

Forms 4 and 5

Insider transactions

50 trades

Date	Company	Role	Code	Shares	Price	Value	Shares after
2025-07-29	CYANCYANOTECH CORPM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	+1,577 sh	—	—	147,289
2025-07-29	CYANCYANOTECH CORPF Tax Payment	Chief Scientific Officer	FTax Payment	−592 sh	$0.41	−$239.76	146,697
2025-07-29	CYANCYANOTECH CORP · Restricted Stock UnitsM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	−1,577 sh	—	—	34
2025-04-07	CYANCYANOTECH CORPM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	+33 sh	—	—	145,725
2025-04-07	CYANCYANOTECH CORPF Tax Payment	Chief Scientific Officer	FTax Payment	−13 sh	$0.31	−$4.03	145,712
2025-04-07	CYANCYANOTECH CORP · Restricted Stock UnitsM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	−33 sh	—	—	1,611
2025-02-18	CYANCYANOTECH CORPM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	+3,900 sh	—	—	147,156
2025-02-18	CYANCYANOTECH CORPF Tax Payment	Chief Scientific Officer	FTax Payment	−1,464 sh	$0.40	−$585.6	145,692
2025-02-18	CYANCYANOTECH CORP · Restricted Stock UnitsM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	−3,900 sh	—	—	1,644
2024-07-29	CYANCYANOTECH CORPM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	+1,576 sh	—	—	143,848
2024-07-29	CYANCYANOTECH CORPF Tax Payment	Chief Scientific Officer	FTax Payment	−592 sh	$0.56	−$331.52	143,256
2024-07-29	CYANCYANOTECH CORP · Restricted Stock UnitsM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	−1,576 sh	—	—	5,544
2024-04-08	CYANCYANOTECH CORPM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	+33 sh	—	—	142,285
2024-04-08	CYANCYANOTECH CORPF Tax Payment	Chief Scientific Officer	FTax Payment	−13 sh	$0.40	−$5.2	142,272
2024-04-08	CYANCYANOTECH CORP · Restricted Stock UnitsM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	−33 sh	—	—	7,120
2024-02-16	CYANCYANOTECH CORPM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	+3,900 sh	—	—	143,717
2024-02-16	CYANCYANOTECH CORPF Tax Payment	Chief Scientific Officer	FTax Payment	−1,465 sh	$0.44	−$644.6	142,252
2024-02-16	CYANCYANOTECH CORP · Restricted Stock UnitsM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	−3,900 sh	—	—	7,153
2023-07-31	CYANCYANOTECH CORPM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	+2,243 sh	—	—	140,660
2023-07-31	CYANCYANOTECH CORPF Tax Payment	Chief Scientific Officer	FTax Payment	−843 sh	$0.84	−$708.12	139,817
2023-07-31	CYANCYANOTECH CORP · Restricted Stock UnitsM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	−2,243 sh	—	—	3,253
2023-04-06	CYANCYANOTECH CORPM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	+34 sh	—	—	138,430
2023-04-06	CYANCYANOTECH CORPF Tax Payment	Chief Scientific Officer	FTax Payment	−13 sh	$0.94	−$12.22	138,417
2023-04-06	CYANCYANOTECH CORP · Restricted Stock UnitsA Award	Chief Scientific Officer	AAward	+100 sh	—	—	5,530
2023-04-06	CYANCYANOTECH CORP · Restricted Stock UnitsM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	−34 sh	—	—	5,496
2022-08-01	CYANCYANOTECH CORPM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	+666 sh	—	—	138,647
2022-08-01	CYANCYANOTECH CORPF Tax Payment	Chief Scientific Officer	FTax Payment	−251 sh	$3.15	−$790.65	138,396
2022-08-01	CYANCYANOTECH CORP · Restricted Stock UnitsM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	−666 sh	—	—	5,430
2022-07-29	CYANCYANOTECH CORP · Restricted Stock UnitsA Award	Chief Scientific Officer	AAward	+4,729 sh	—	—	6,096
2022-04-06	CYANCYANOTECH CORPM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	+33 sh	—	—	137,994
2022-04-06	CYANCYANOTECH CORPF Tax Payment	Chief Scientific Officer	FTax Payment	−13 sh	$3.03	−$39.39	137,981
2022-04-06	CYANCYANOTECH CORP · Restricted Stock UnitsM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	−33 sh	—	—	1,367
2021-07-30	CYANCYANOTECH CORPM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	+666 sh	—	—	138,212
2021-07-30	CYANCYANOTECH CORPF Tax Payment	Chief Scientific Officer	FTax Payment	−251 sh	$3.06	−$768.06	137,961
2021-07-30	CYANCYANOTECH CORP · Restricted Stock UnitsM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	−666 sh	—	—	1,400
2021-07-13	CYANCYANOTECH CORPM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	+736 sh	—	—	137,823
2021-07-13	CYANCYANOTECH CORPF Tax Payment	Chief Scientific Officer	FTax Payment	−277 sh	$2.99	−$828.23	137,546
2021-07-13	CYANCYANOTECH CORP · Restricted Stock UnitsM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	−736 sh	—	—	2,066
2021-04-06	CYANCYANOTECH CORPM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	+33 sh	—	—	137,100
2021-04-06	CYANCYANOTECH CORPF Tax Payment	Chief Scientific Officer	FTax Payment	−13 sh	$3.35	−$43.55	137,087
2021-04-06	CYANCYANOTECH CORP · Restricted Stock UnitsM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	−33 sh	—	—	2,802
2020-07-30	CYANCYANOTECH CORP · Restricted Stock UnitsA Award	Chief Scientific Officer	AAward	+1,999 sh	—	—	2,835
2020-07-13	CYANCYANOTECH CORPM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	+737 sh	—	—	137,344
2020-07-13	CYANCYANOTECH CORPF Tax Payment	Chief Scientific Officer	FTax Payment	−277 sh	$2.25	−$623.25	137,067
2020-07-13	CYANCYANOTECH CORP · Restricted Stock UnitsM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	−737 sh	—	—	836
2020-04-06	CYANCYANOTECH CORPM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	+166 sh	—	—	136,670
2020-04-06	CYANCYANOTECH CORPF Tax Payment	Chief Scientific Officer	FTax Payment	−63 sh	$2.07	−$130.41	136,607
2020-04-06	CYANCYANOTECH CORP · Restricted Stock UnitsA Award	Chief Scientific Officer	AAward	+100 sh	—	—	1,573
2020-03-31	CYANCYANOTECH CORPM Exercise/Conversion	Chief Scientific Officer	MExercise/Conversion	+8,334 sh	—	—	139,634
2020-03-31	CYANCYANOTECH CORPF Tax Payment	Chief Scientific Officer	FTax Payment	−3,130 sh	$2.06	−$6,447.8	136,504

Recent filings

Accepted (ET)
Jul 314
Cysewski Gerald R0001437749-25-024122
SEC(opens sec.gov)
Apr 94
Cysewski Gerald R0001437749-25-011512
SEC(opens sec.gov)
Feb 204
Cysewski Gerald R0001437749-25-004537
SEC(opens sec.gov)
Jul 314
Cysewski Gerald R0001437749-24-024101
SEC(opens sec.gov)
Apr 104
Cysewski Gerald R0001437749-24-011674
SEC(opens sec.gov)
Feb 214
Cysewski Gerald R0001437749-24-004959
SEC(opens sec.gov)
Aug 14
Cysewski Gerald R0001437749-23-021368
SEC(opens sec.gov)

Companies

CYANOTECH CORPChief Scientific OfficerCYAN

Address

73-4460 QUEEN KAAHUMANU HWY # 102

KAILUA- KONA, HI, 96740