1. Corporate Officers - D
2. Demski David M

Insider Trading History of Demski David M

The following table details the insider trading activities (stock purchases, stock sales, and stock option exercises) of Demski David M since 2015. This trader's CIK number is 1555392. At the time of last reporting, Demski David M was the Officer of Alphatec Holdings, Inc.. (stock ticker symbol ATEC). Also see all insider trading activities at Alphatec Holdings, Inc..

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

Yearly summary of insider trading at Alphatec Holdings, Inc. (ATEC) by Demski David M

		Insider Buying		Insider Sales		Option Exercises
Year	Symbol	Shares	Value	Shares	Value	Shares	Value
2025	ATEC	0	$0	30,000	$636,000	0	$0
2024	ATEC	90,000	$545,900	0	$0	0	$0
2023	ATEC	30,000	$315,000	0	$0	0	$0

Yearly summary of insider trading at Globus Medical Inc (GMED) by Demski David M

		Insider Buying		Insider Sales		Option Exercises
Year	Symbol	Shares	Value	Shares	Value	Shares	Value
2020	GMED	0	$0	547,075	$32,491,124	398,220	$14,895,240
2018	GMED	0	$0	200,000	$10,200,000	200,000	$4,484,866
2015	GMED	0	$0	32,510	$845,260	0	$0

Insider trading activities at 2 companies by Demski David M:

1. Alphatec Holdings, Inc. (ATEC)

2. Globus Medical Inc (GMED)

Table 1. Insider trading of Alphatec Holdings, Inc. (ATEC) by Demski David M

Trade Date	Symbol	Trade Type	Shares	Price ($)	Value ($)
2025-12-11	ATEC	Sale	30,000	21.20	636,000
2024-08-21	ATEC	Buy	50,000	5.67	283,500
2024-08-02	ATEC	Buy	40,000	6.56	262,400
2023-11-09	ATEC	Buy	30,000	10.50	315,000

Table 2. Insider trading of Globus Medical Inc (GMED) by Demski David M

Trade Date	Symbol	Trade Type	Shares	Price ($)	Value ($)
2020-12-17	GMED	Sale	164,719	64.20	10,574,959
2020-12-16	GMED	Option Ex	52,356	32.09	1,680,208
2020-12-17	GMED	Option Ex	15,864	24.10	382,322
2020-12-16	GMED	Sale	52,356	64.20	3,361,255
2020-08-06	GMED	Option Ex	330,000	38.89	12,832,710
2020-08-06	GMED	Sale	330,000	56.23	18,554,910
2018-04-18	GMED	Sale	52,062	51.00	2,655,162
2018-04-19	GMED	Sale	97,047	51.00	4,949,397
2018-04-18	GMED	Option Ex	52,062	24.02	1,250,789
2018-04-19	GMED	Option Ex	97,047	24.81	2,407,736
2018-04-12	GMED	Option Ex	47,848	15.75	753,462
2018-04-13	GMED	Option Ex	3,043	23.95	72,879
2018-04-12	GMED	Sale	47,848	51.00	2,440,248
2018-04-13	GMED	Sale	3,043	51.00	155,193
2015-02-26	GMED	Sale	32,510	26.00	845,260

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 Demski David M (Officer of Alphatec Holdings, Inc. at the time of this reporting) see the Securities and Exchange Commission (SEC) website.

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