1. Corporate Officers - T
2. Thorburn James M

Insider Trading History of Thorburn James M

The following table details the insider trading activities (stock purchases, stock sales, and stock option exercises) of Thorburn James M since 2005. This trader's CIK number is 1252038. At the time of last reporting, Thorburn James M was the Chief Financial Officer of Twist Bioscience Corp. (stock ticker symbol TWST). Also see all insider trading activities at Twist Bioscience Corp.

Note that in the past THORBURN JAMES M also reported insider trading activities as an insider of the following companies:

Yearly summary of insider trading at Zilog Inc (ZILG) by Thorburn James M

		Insider Buying		Insider Sales		Option Exercises
Year	Symbol	Shares	Value	Shares	Value	Shares	Value
2005	ZILG	4,000	$18,000	0	$0	0	$0

Yearly summary of insider trading at Ixys Corp /de/ (IXYS) by Thorburn James M

		Insider Buying		Insider Sales		Option Exercises
Year	Symbol	Shares	Value	Shares	Value	Shares	Value
2017	IXYS	0	$0	55,000	$1,054,565	55,000	$577,688
2015	IXYS	0	$0	65,000	$937,837	65,000	$666,968
2011	IXYS	0	$0	20,000	$270,660	20,000	$137,600
2008	IXYS	72	$454	0	$0	0	$0
2008	IXYS	600	$2,905	0	$0	0	$0
2007	IXYS	4,500	$45,703	0	$0	0	$0

Yearly summary of insider trading at Twist Bioscience Corp (TWST) by Thorburn James M

		Insider Buying		Insider Sales		Option Exercises
Year	Symbol	Shares	Value	Shares	Value	Shares	Value
2023	TWST	0	$0	0	$0	13,324	$154,425
2022	TWST	0	$0	36,022	$1,668,548	29,274	$551,900
2021	TWST	0	$0	31,000	$3,356,285	31,000	$525,060
2020	TWST	0	$0	140,018	$10,662,969	140,000	$2,568,850
2019	TWST	0	$0	10,000	$298,249	10,000	$115,900

Insider trading activities at 3 companies by Thorburn James M:

1. Zilog Inc (ZILG)

2. Ixys Corp /de/ (IXYS)

3. Twist Bioscience Corp (TWST)

Table 1. Insider trading of Zilog Inc (ZILG) by Thorburn James M

Trade Date	Symbol	Trade Type	Shares	Price ($)	Value ($)
2005-05-09	ZILG	Buy	2,000	4.50	9,000
2005-05-05	ZILG	Buy	2,000	4.50	9,000

Table 2. Insider trading of Ixys Corp /de/ (IXYS) by Thorburn James M

Trade Date	Symbol	Trade Type	Shares	Price ($)	Value ($)
2017-12-06	IXYS	Option Ex	13,900	10.76	149,564
2017-12-06	IXYS	Sale	13,900	23.68	329,193
2017-12-05	IXYS	Option Ex	11,100	12.25	135,975
2017-12-05	IXYS	Sale	11,100	23.88	265,012
2017-06-08	IXYS	Option Ex	20,000	9.37	187,399
2017-06-08	IXYS	Sale	20,000	16.41	328,200
2017-02-09	IXYS	Option Ex	10,000	10.47	104,750
2017-02-09	IXYS	Sale	10,000	13.22	132,160
2015-06-24	IXYS	Sale	4,235	16.50	69,877
2015-06-23	IXYS	Sale	5,765	16.12	92,960
2015-06-24	IXYS	Option Ex	4,235	11.50	48,702
2015-06-23	IXYS	Option Ex	5,765	11.50	66,297
2015-06-15	IXYS	Option Ex	10,000	9.52	95,200
2015-06-16	IXYS	Option Ex	5,000	11.50	57,500
2015-06-15	IXYS	Sale	10,000	14.50	145,000
2015-06-16	IXYS	Sale	5,000	15.00	75,000
2015-06-12	IXYS	Sale	30,000	14.00	420,000
2015-06-12	IXYS	Option Ex	30,000	9.98	299,400
2015-06-09	IXYS	Option Ex	152	10.44	1,586
2015-06-10	IXYS	Option Ex	9,848	9.98	98,283
2015-06-09	IXYS	Sale	152	13.50	2,052
2015-06-10	IXYS	Sale	9,848	13.50	132,948
2011-05-27	IXYS	Option Ex	10,000	6.88	68,800
2011-05-27	IXYS	Sale	10,000	13.72	137,200
2011-03-04	IXYS	Sale	10,000	13.35	133,460
2011-03-04	IXYS	Option Ex	10,000	6.88	68,800
2008-10-27	IXYS	Buy	72	6.31	454
2008-11-21	IXYS	Buy	600	4.84	2,905
2007-09-07	IXYS	Buy	2,000	10.60	21,204
2007-08-03	IXYS	Buy	800	9.80	7,839
2007-09-03	IXYS	Buy	1,700	9.80	16,660

Table 3. Insider trading of Twist Bioscience Corp (TWST) by Thorburn James M

Trade Date	Symbol	Trade Type	Shares	Price ($)	Value ($)
2023-05-23	TWST	Option Ex	13,324	11.59	154,425
2022-08-17	TWST	Option Ex	9,000	11.59	104,310
2022-08-16	TWST	Sale	4,900	51.03	250,027
2022-08-17	TWST	Sale	9,000	48.62	437,580
2022-05-20	TWST	Option Ex	6,620	20.53	135,888
2022-05-23	TWST	Sale	923	36.86	34,025
2022-05-20	TWST	Sale	6,620	36.39	240,901
2022-04-14	TWST	Sale	6,620	43.12	285,454
2022-04-14	TWST	Option Ex	6,620	20.53	135,888
2022-03-03	TWST	Option Ex	3,517	25.00	87,907
2022-03-03	TWST	Sale	3,517	52.82	185,757
2022-02-22	TWST	Option Ex	3,517	25.00	87,907
2022-02-22	TWST	Sale	4,442	52.86	234,804
2021-12-08	TWST	Option Ex	7,000	11.59	81,130
2021-12-08	TWST	Sale	7,000	88.02	616,105
2021-10-12	TWST	Option Ex	8,000	11.59	92,720
2021-10-12	TWST	Sale	8,000	101.76	814,080
2021-07-21	TWST	Sale	5,000	119.75	598,750
2021-07-21	TWST	Option Ex	5,000	26.66	133,300
2021-04-22	TWST	Sale	5,000	133.47	667,350
2021-04-22	TWST	Option Ex	5,000	11.59	57,950
2021-03-30	TWST	Option Ex	6,000	26.66	159,960
2021-03-30	TWST	Sale	6,000	110.00	660,000
2020-12-10	TWST	Option Ex	20,000	17.46	349,200
2020-12-10	TWST	Sale	20,018	149.40	2,990,589
2020-09-09	TWST	Option Ex	20,000	26.66	533,200
2020-09-09	TWST	Sale	20,000	66.16	1,323,280
2020-09-04	TWST	Option Ex	30,000	11.59	347,700
2020-09-04	TWST	Sale	30,000	63.55	1,906,620
2020-09-08	TWST	Option Ex	70,000	19.12	1,338,750
2020-09-08	TWST	Sale	70,000	63.46	4,442,480
2019-08-19	TWST	Sale	3,500	30.35	106,239
2019-08-16	TWST	Option Ex	6,500	11.59	75,335
2019-08-16	TWST	Sale	6,500	29.54	192,010
2019-08-19	TWST	Option Ex	3,500	11.59	40,565

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Thorburn James M (Chief Financial Officer of Twist Bioscience Corp at the time of this reporting) see the Securities and Exchange Commission (SEC) website.

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