Jon Coleman

Insider

First SEC filing: June 5, 2026 · Latest: June 5, 2026

On this page

Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.
Compensation Executive pay disclosed in company proxy statements.

Insider at

DXCM selling June 4, 2026

Insider transactions

0 buys (P) 2 sells (S) Net: $-722,628 + 72 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

72 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 4, 2026	DXCM	S 10b5-1	4,911	$74.13	$364,052	95,450 Direct	-4.89%	Disposed	23.2% (price as of 2026-08-19)
June 3, 2026	DXCM	S 10b5-1	4,912	$73.00	$358,576	100,361 Direct	-4.67%	Disposed	25.1% (price as of 2026-08-19)
May 22, 2026	DXCM	F	7,362	$71.90	$529,328	105,273 Direct	-6.54%	Disposed	27.0% (price as of 2026-08-19)
March 8, 2026	DXCM	A	43,897	—	—	112,635 Direct	+63.86%	Acquired	(price as of 2026-08-19)
May 22, 2025	DXCM	A	68,738	—	—	68,738 Direct	—	Acquired	(price as of 2026-08-19)
Feb. 26, 2021	MASI	A	2,637	$250.73	$661,175	2,637 Direct	—	Acquired
Feb. 22, 2021	MASI	A	14,593	—	—	28,272 Direct	+106.68%	Acquired
Jan. 2, 2021	MASI	M	2,000	—	—	2,000 Direct	-50.00%	Disposed
Jan. 2, 2021	MASI	F	786	$268.38	$210,947	13,679 Direct	-5.43%	Disposed
Jan. 2, 2021	MASI	M	2,000	—	—	14,465 Direct	+16.04%	Acquired
Dec. 28, 2020	MASI	M	8,250	$31.01	$255,832	2,500 Direct	-76.74%	Disposed
Dec. 28, 2020	MASI	S 10b5-1	8,250	$264.02	$2,178,165	12,465 Direct	-39.83%	Disposed
Dec. 28, 2020	MASI	M	8,250	$31.01	$255,832	20,715 Direct	+66.19%	Acquired
July 6, 2020	MASI	M	1,250	$31.01	$38,762	10,750 Direct	-10.42%	Disposed
July 6, 2020	MASI	S 10b5-1	1,250	$235.00	$293,750	12,465 Direct	-9.11%	Disposed
July 6, 2020	MASI	M	1,250	$31.01	$38,762	13,715 Direct	+10.03%	Acquired
April 15, 2020	MASI	M	2,000	$28.03	$56,060	0 Direct	-100.00%	Disposed
April 15, 2020	MASI	M	2,000	$28.03	$56,060	2,000 Direct	-50.00%	Disposed
April 15, 2020	MASI	S 10b5-1	2,000	$200.00	$400,000	12,465 Direct	-13.83%	Disposed
April 15, 2020	MASI	M	2,000	$28.03	$56,060	14,465 Direct	+16.04%	Acquired
April 15, 2020	MASI	S 10b5-1	2,000	$195.00	$390,000	12,465 Direct	-13.83%	Disposed
April 15, 2020	MASI	M	2,000	$28.03	$56,060	14,465 Direct	+16.04%	Acquired
April 14, 2020	MASI	M	2,000	$28.03	$56,060	4,000 Direct	-33.33%	Disposed
April 14, 2020	MASI	S 10b5-1	2,000	$190.00	$380,000	12,465 Direct	-13.83%	Disposed
April 14, 2020	MASI	M	2,000	$28.03	$56,060	14,465 Direct	+16.04%	Acquired
March 12, 2020	MASI	A	4,422	$179.42	$793,395	4,422 Direct	—	Acquired
Jan. 2, 2020	MASI	M	2,000	—	—	4,000 Direct	-33.33%	Disposed
Jan. 2, 2020	MASI	F	736	$158.58	$116,715	12,465 Direct	-5.58%	Disposed
Jan. 2, 2020	MASI	M	2,000	—	—	13,201 Direct	+17.86%	Acquired
April 1, 2019	MASI	M	2,000	$31.01	$62,020	12,000 Direct	-14.29%	Disposed
April 1, 2019	MASI	S 10b5-1	2,000	$140.00	$280,000	11,201 Direct	-15.15%	Disposed
April 1, 2019	MASI	M	2,000	$31.01	$62,020	13,201 Direct	+17.86%	Acquired
March 15, 2019	MASI	A	7,235	$133.50	$965,872	7,235 Direct	—	Acquired
Feb. 27, 2019	MASI	M	2,000	$31.01	$62,020	14,000 Direct	-12.50%	Disposed
Feb. 27, 2019	MASI	S 10b5-1	2,000	$135.00	$270,000	11,201 Direct	-15.15%	Disposed
Feb. 27, 2019	MASI	M	2,000	$31.01	$62,020	13,201 Direct	+17.86%	Acquired
Feb. 25, 2019	MASI	M	2,000	$31.01	$62,020	16,000 Direct	-11.11%	Disposed
Feb. 25, 2019	MASI	S 10b5-1	2,000	$130.00	$260,000	11,201 Direct	-15.15%	Disposed
Feb. 25, 2019	MASI	M	2,000	$31.01	$62,020	13,201 Direct	+17.86%	Acquired
Jan. 31, 2019	MASI	M	2,000	$21.97	$43,940	0 Direct	-100.00%	Disposed
Jan. 31, 2019	MASI	S 10b5-1	2,000	$125.00	$250,000	11,201 Direct	-15.15%	Disposed
Jan. 31, 2019	MASI	M	2,000	$21.97	$43,940	13,201 Direct	+17.86%	Acquired
Jan. 18, 2019	MASI	M	2,000	$21.97	$43,940	2,000 Direct	-50.00%	Disposed
Jan. 18, 2019	MASI	S 10b5-1	2,000	$120.00	$240,000	11,201 Direct	-15.15%	Disposed
Jan. 18, 2019	MASI	M	2,000	$21.97	$43,940	13,201 Direct	+17.86%	Acquired
Jan. 15, 2019	MASI	M	2,000	$21.97	$43,940	4,000 Direct	-33.33%	Disposed
Jan. 15, 2019	MASI	S 10b5-1	2,000	$115.00	$230,000	11,201 Direct	-15.15%	Disposed
Jan. 15, 2019	MASI	M	2,000	$21.97	$43,940	13,201 Direct	+17.86%	Acquired
Jan. 2, 2019	MASI	M	2,000	—	—	6,000 Direct	-25.00%	Disposed
Jan. 2, 2019	MASI	M	2,000	—	—	11,201 Direct	+21.74%	Acquired
May 3, 2018	MASI	M	25,000	$30.06	$751,500	0 Direct	-100.00%	Disposed
May 3, 2018	MASI	M	25,000	$40.20	$1,005,000	0 Direct	-100.00%	Disposed
May 3, 2018	MASI	S 10b5-1	25,000	$92.50	$2,312,500	9,201 Direct	-73.10%	Disposed
May 3, 2018	MASI	M	25,000	$30.06	$751,500	34,201 Direct	+271.71%	Acquired
May 3, 2018	MASI	S 10b5-1	25,000	$95.00	$2,375,000	9,201 Direct	-73.10%	Disposed
May 3, 2018	MASI	M	25,000	$40.20	$1,005,000	34,201 Direct	+271.71%	Acquired
April 23, 2018	MASI	M	12,000	$37.84	$454,080	18,000 Direct	-40.00%	Disposed
April 23, 2018	MASI	M	12,000	$31.01	$372,120	18,000 Direct	-40.00%	Disposed
April 23, 2018	MASI	S 10b5-1	12,000	$90.00	$1,080,000	9,201 Direct	-56.60%	Disposed
April 23, 2018	MASI	M	12,000	$37.84	$454,080	21,201 Direct	+130.42%	Acquired
April 23, 2018	MASI	S 10b5-1	12,000	$90.00	$1,080,000	9,201 Direct	-56.60%	Disposed
April 23, 2018	MASI	M	12,000	$31.01	$372,120	21,201 Direct	+130.42%	Acquired
March 29, 2018	MASI	M	12,000	$28.03	$336,360	6,000 Direct	-66.67%	Disposed
March 29, 2018	MASI	M	6,000	$21.97	$131,820	6,000 Direct	-50.00%	Disposed
March 29, 2018	MASI	M	11,303	$24.68	$278,958	0 Direct	-100.00%	Disposed
March 29, 2018	MASI	S 10b5-1	12,000	$87.50	$1,050,000	9,201 Direct	-56.60%	Disposed
March 29, 2018	MASI	M	12,000	$28.03	$336,360	21,201 Direct	+130.42%	Acquired
March 29, 2018	MASI	S 10b5-1	6,000	$87.50	$525,000	9,201 Direct	-39.47%	Disposed
March 29, 2018	MASI	M	6,000	$21.97	$131,820	15,201 Direct	+65.21%	Acquired
March 29, 2018	MASI	S 10b5-1	11,303	$87.50	$989,012	9,201 Direct	-55.13%	Disposed
March 29, 2018	MASI	M	11,303	$24.68	$278,958	20,504 Direct	+122.85%	Acquired
March 16, 2018	MASI	A	10,436	$86.95	$907,410	10,436 Direct	—	Acquired
Feb. 27, 2018	MASI	M	2,000	—	—	8,000 Direct	-20.00%	Disposed
Feb. 27, 2018	MASI	A	10,000	—	—	10,000 Direct	—	Acquired
Feb. 27, 2018	MASI	M	2,000	—	—	9,201 Direct	+27.77%	Acquired
July 20, 2017	MASI	M	25,000	$40.20	$1,005,000	25,000 Direct	-50.00%	Disposed
July 20, 2017	MASI	S 10b5-1	25,000	$97.50	$2,437,500	7,201 Direct	-77.64%	Disposed
July 20, 2017	MASI	M	25,000	$40.20	$1,005,000	32,201 Direct	+347.17%	Acquired
June 5, 2017	MASI	A	10,000	—	—	10,000 Direct	—	Acquired
April 25, 2017	MASI	M	15,000	$40.20	$603,000	50,000 Direct	-23.08%	Disposed
April 25, 2017	MASI	M	15,000	$40.20	$603,000	65,000 Direct	-18.75%	Disposed
April 25, 2017	MASI	M	12,500	$40.20	$502,500	80,000 Direct	-13.51%	Disposed
April 25, 2017	MASI	M	7,500	$40.20	$301,500	92,500 Direct	-7.50%	Disposed
April 25, 2017	MASI	S 10b5-1	15,000	$100.00	$1,500,000	7,201 Direct	-67.56%	Disposed
April 25, 2017	MASI	M	15,000	$40.20	$603,000	22,201 Direct	+208.30%	Acquired
April 25, 2017	MASI	S 10b5-1	15,000	$100.00	$1,500,000	7,201 Direct	-67.56%	Disposed
April 25, 2017	MASI	M	15,000	$40.20	$603,000	22,201 Direct	+208.30%	Acquired
April 25, 2017	MASI	S 10b5-1	12,500	$100.00	$1,250,000	7,201 Direct	-63.45%	Disposed
April 25, 2017	MASI	M	12,500	$40.20	$502,500	19,701 Direct	+173.59%	Acquired
April 25, 2017	MASI	S 10b5-1	7,500	$100.00	$750,000	7,201 Direct	-51.02%	Disposed
April 25, 2017	MASI	M	7,500	$40.20	$301,500	14,682 Direct	+104.43%	Acquired
Feb. 3, 2017	MASI	M	6,000	$24.68	$148,080	11,303 Direct	-34.68%	Disposed
Feb. 3, 2017	MASI	S 10b5-1	6,000	$75.00	$450,000	7,182 Direct	-45.52%	Disposed
Feb. 3, 2017	MASI	M	6,000	$24.68	$148,080	13,182 Direct	+83.54%	Acquired
Jan. 27, 2017	MASI	M	4,275	$24.68	$105,507	17,303 Direct	-19.81%	Disposed
Jan. 27, 2017	MASI	S 10b5-1	4,275	$72.50	$309,938	7,182 Direct	-37.31%	Disposed
Jan. 27, 2017	MASI	M	4,275	$24.68	$105,507	11,457 Direct	+59.52%	Acquired
Jan. 25, 2017	MASI	M	1,525	$24.68	$37,637	21,578 Direct	-6.60%	Disposed
Jan. 25, 2017	MASI	S 10b5-1	1,525	$72.50	$110,562	7,182 Direct	-17.51%	Disposed
Jan. 25, 2017	MASI	M	1,525	$24.68	$37,637	8,707 Direct	+21.23%	Acquired

Showing latest 100 of 168 transactions

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II)

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
Feb. 26, 2021	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (2,637)	$250.73	Feb. 26, 2031	2,637	Acquired
Jan. 2, 2021	MASI	Restricted Stock Units	Common Stock (2,000)	—	—	2,000	Disposed
Dec. 28, 2020	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (8,250)	$31.01	March 20, 2025	8,250	Disposed
July 6, 2020	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (1,250)	$31.01	March 20, 2025	1,250	Disposed
April 15, 2020	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (2,000)	$28.03	Feb. 18, 2024	2,000	Disposed
April 15, 2020	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (2,000)	$28.03	Feb. 18, 2024	2,000	Disposed
April 14, 2020	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (2,000)	$28.03	Feb. 18, 2024	2,000	Disposed
March 12, 2020	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (4,422)	$179.42	March 12, 2030	4,422	Acquired
Jan. 2, 2020	MASI	Restricted Stock Units	Common Stock (2,000)	—	—	2,000	Disposed
April 1, 2019	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (2,000)	$31.01	March 20, 2025	2,000	Disposed
March 15, 2019	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (7,235)	$133.50	March 15, 2029	7,235	Acquired
Feb. 27, 2019	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (2,000)	$31.01	March 20, 2025	2,000	Disposed
Feb. 25, 2019	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (2,000)	$31.01	March 20, 2025	2,000	Disposed
Jan. 31, 2019	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (2,000)	$21.97	May 28, 2023	2,000	Disposed
Jan. 18, 2019	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (2,000)	$21.97	May 28, 2023	2,000	Disposed
Jan. 15, 2019	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (2,000)	$21.97	May 28, 2023	2,000	Disposed
Jan. 2, 2019	MASI	Restricted Stock Units	Common Stock (2,000)	—	—	2,000	Disposed
May 3, 2018	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (25,000)	$30.06	Feb. 22, 2021	25,000	Disposed
May 3, 2018	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (25,000)	$40.20	Aug. 11, 2018	25,000	Disposed
April 23, 2018	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (12,000)	$37.84	Feb. 28, 2026	12,000	Disposed
April 23, 2018	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (12,000)	$31.01	March 20, 2025	12,000	Disposed
March 29, 2018	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (12,000)	$28.03	Feb. 18, 2024	12,000	Disposed
March 29, 2018	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (6,000)	$21.97	May 28, 2023	6,000	Disposed
March 29, 2018	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (11,303)	$24.68	Aug. 17, 2019	11,303	Disposed
March 16, 2018	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (10,436)	$86.95	March 16, 2028	10,436	Acquired
Feb. 27, 2018	MASI	Restricted Stock Units	Common Stock (2,000)	—	—	2,000	Disposed
Feb. 27, 2018	MASI	Restricted Stock Units	Common Stock (10,000)	—	—	10,000	Acquired
July 20, 2017	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (25,000)	$40.20	Aug. 11, 2018	25,000	Disposed
June 5, 2017	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (10,000)	$90.87	June 5, 2027	10,000	Acquired
April 25, 2017	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (15,000)	$40.20	Aug. 11, 2018	15,000	Disposed
April 25, 2017	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (15,000)	$40.20	Aug. 11, 2018	15,000	Disposed
April 25, 2017	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (12,500)	$40.20	Aug. 11, 2018	12,500	Disposed
April 25, 2017	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (7,500)	$40.20	Aug. 11, 2018	7,500	Disposed
Feb. 3, 2017	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (6,000)	$24.68	Aug. 17, 2019	6,000	Disposed
Jan. 27, 2017	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (4,275)	$24.68	Aug. 17, 2019	4,275	Disposed
Jan. 25, 2017	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (1,525)	$24.68	Aug. 17, 2019	1,525	Disposed
Jan. 20, 2017	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (100)	$24.68	Aug. 17, 2019	100	Disposed
Jan. 19, 2017	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (100)	$24.68	Aug. 17, 2019	100	Disposed
Jan. 10, 2017	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (6,000)	$24.68	Aug. 17, 2019	6,000	Disposed
Jan. 3, 2017	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (6,697)	$24.68	Aug. 17, 2019	6,697	Disposed
Dec. 21, 2016	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (4,000)	$24.68	Aug. 17, 2019	4,000	Disposed
Nov. 7, 2016	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (6,000)	$20.19	Oct. 27, 2021	6,000	Disposed
Sept. 7, 2016	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (5,700)	$28.03	Feb. 18, 2024	5,700	Disposed
Sept. 6, 2016	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (300)	$28.03	Feb. 18, 2024	300	Disposed
Aug. 4, 2016	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (6,000)	$28.03	Feb. 18, 2024	6,000	Disposed
Aug. 4, 2016	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (6,000)	$21.97	May 28, 2023	6,000	Disposed
Aug. 4, 2016	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (10,000)	$24.68	Aug. 17, 2019	10,000	Disposed
June 1, 2016	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (4,000)	$21.97	May 28, 2023	4,000	Disposed
May 5, 2016	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (4,000)	$21.97	May 28, 2023	4,000	Disposed
May 5, 2016	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (4,000)	$21.97	May 28, 2023	4,000	Disposed
April 27, 2016	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (4,000)	$20.19	Oct. 27, 2021	4,000	Disposed
Feb. 29, 2016	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (30,000)	$37.84	March 1, 2026	30,000	Acquired
Dec. 24, 2015	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (10,000)	$20.19	Oct. 27, 2021	10,000	Disposed
Nov. 6, 2015	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (2,500)	$20.19	Oct. 27, 2021	2,500	Disposed
Nov. 6, 2015	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (2,500)	$20.19	Oct. 27, 2021	2,500	Disposed
Nov. 6, 2015	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (2,500)	$20.19	Oct. 27, 2021	2,500	Disposed
Nov. 6, 2015	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (2,500)	$20.19	Oct. 27, 2021	2,500	Disposed
March 20, 2015	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (30,000)	$31.01	March 20, 2025	30,000	Acquired
Feb. 18, 2014	MASI	Non-Qualified Stock Option (Right to Buy)	Common Stock (30,000)	$28.03	Feb. 18, 2024	30,000	Acquired
May 28, 2013	MASI	Non-qualified stock optin (right to buy)	Common Stock (30,000)	$21.97	May 28, 2023	30,000	Acquired
Oct. 27, 2011	MASI	Non-qualified Stock Option (Right to buy)	Common Stock (30,000)	$20.19	Oct. 27, 2021	30,000	Acquired
Feb. 22, 2011	MASI	Non-qualified Stock Option (Right to buy)	Common Stock (30,000)	$30.06	Feb. 22, 2021	25,000	Acquired
Aug. 17, 2009	MASI	Non-qualified Stock Option (right to buy)	Common Stock (50,000)	$24.68	Aug. 17, 2019	50,000	Acquired
Aug. 11, 2008	MASI	Non-qualified Stock Option (right to buy)	Common Stock (100,000)	$40.20	Aug. 11, 2018	100,000	Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Compensation (DEF 14A)

Matched by name from proxy statements (DEF 14A) — verify against the filing.

CIK 937556

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2017	$376,642	—	—	—	$200,000	—	$7,950	$1,777,812
2015	$354,103	—	—	—	$194,400	—	$7,950	$870,076
2013	$332,410	—	—	—	$141,274	—	$5,753	$711,448

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.