1. Corporate Officers - S
2. Spink Katharine E.

Insider Trading History of Spink Katharine E.

The following table details the insider trading activities (stock purchases, stock sales, and stock option exercises) by Spink Katharine E. since 2009. The trader's CIK number is 1457130. At the time of the last reporting, Spink Katharine E. was the VP Operations, Regen of Asterias Biotherapeutics, Inc.. (stock ticker symbol AST). Also see all insider trading activities at Asterias Biotherapeutics, Inc..

Note that in the past Spink Katharine E. also reported insider trading activities as an insider of the following companies:

Yearly summary of insider trading at Asterias Biotherapeutics, Inc. (AST) by Spink Katharine E.

		Insider Buying		Insider Sales		Option Exercises
Year	Symbol	Shares	Value	Shares	Value	Shares	Value
2017	AST	0	$0	7,281	$34,506	2,500	$5,850
2016	AST	0	$0	29,117	$113,701	5,000	$11,700
2015	AST	0	$0	3,760	$22,560	0	$0

Yearly summary of insider trading at Geron Corp (GERN) by Spink Katharine E.

		Insider Buying		Insider Sales		Option Exercises
Year	Symbol	Shares	Value	Shares	Value	Shares	Value
2011	GERN	0	$0	23,010	$98,561	0	$0
2010	GERN	0	$0	8,571	$46,416	0	$0
2009	GERN	0	$0	3,264	$21,872	0	$0

Insider trading activities at 2 companies by Spink Katharine E.:

1. Asterias Biotherapeutics, Inc. (AST)

2. Geron Corp (GERN)

Table 1. Insider trading of Asterias Biotherapeutics, Inc. (AST) by Spink Katharine E.

Trade Date	Symbol	Trade Type	Shares	Price ($)	Value ($)
2017-01-09	AST	Sale	4,781	4.60	22,006
2016-12-27	AST	Option Ex	2,500	2.34	5,850
2016-12-27	AST	Sale	2,500	5.00	12,500
2016-11-23	AST	Option Ex	2,500	2.34	5,850
2016-11-23	AST	Sale	2,500	5.41	13,525
2016-11-17	AST	Sale	2,500	5.00	12,500
2016-11-17	AST	Option Ex	2,500	2.34	5,850
2016-10-06	AST	Sale	4,781	4.11	19,635
2016-09-08	AST	Sale	9,728	3.50	34,048
2016-09-09	AST	Sale	9,608	3.54	33,993
2015-09-15	AST	Sale	3,760	6.00	22,560

Table 2. Insider trading of Geron Corp (GERN) by Spink Katharine E.

Trade Date	Symbol	Trade Type	Shares	Price ($)	Value ($)
2011-06-14	GERN	Sale	22,591	4.28	96,689
2011-05-24	GERN	Sale	419	4.47	1,872
2010-06-02	GERN	Sale	8,186	5.43	44,449
2010-05-24	GERN	Sale	385	5.11	1,967
2009-05-29	GERN	Sale	400	6.35	2,540
2009-05-26	GERN	Sale	2,864	6.75	19,332

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 Spink Katharine E. (VP Operations, Regen of Asterias Biotherapeutics, Inc. at the time of this reporting) see the Securities and Exchange Commission (SEC) website.

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