Mark J. Day

Insider

First SEC filing: March 27, 2019 · Latest: March 27, 2019

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.
Initial holdings The stakes this person held when they first started reporting.

Insider at

IRTC selling March 4, 2024

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 28 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

28 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
March 4, 2024	IRTC	S	3,248	$111.14	$360,983	61,164 Direct	-5.04%	Disposed	6.7% (price as of 2026-08-19)
Feb. 29, 2024	IRTC	S	1,475	$121.96	$179,891	64,412 Direct	-2.24%	Disposed	-2.8% (price as of 2026-08-19)
Feb. 28, 2024	IRTC	A	7,734	—	—	65,887 Direct	+13.30%	Acquired	(price as of 2026-08-19)
Feb. 27, 2024	IRTC	A	2,621	—	—	58,153 Direct	+4.72%	Acquired	(price as of 2026-08-19)
Aug. 3, 2023	IRTC	M	486	$36.22	$17,603	55,522 Direct	+0.88%	Acquired	227.3% (price as of 2026-08-19)
Aug. 3, 2023	IRTC	M	486	—	—	13,591 Direct	-3.45%	Disposed	(price as of 2026-08-19)
March 3, 2023	IRTC	S	2,116	$117.23	$248,059	54,815 Direct	-3.72%	Disposed	1.1% (price as of 2026-08-19)
Feb. 28, 2023	IRTC	S	1,898	$117.83	$223,641	56,946 Direct	-3.23%	Disposed	0.6% (price as of 2026-08-19)
Feb. 28, 2023	IRTC	S	15	$119.28	$1,789	56,931 Direct	-0.03%	Disposed	-0.6% (price as of 2026-08-19)
Feb. 27, 2023	IRTC	A	8,354	—	—	55,376 Direct	+17.77%	Acquired	(price as of 2026-08-19)
Feb. 27, 2023	IRTC	A	3,468	—	—	58,844 Direct	+6.26%	Acquired	(price as of 2026-08-19)
March 4, 2022	IRTC	S	2,518	$132.67	$334,063	46,705 Direct	-5.12%	Disposed	-10.7% (price as of 2026-08-19)
Feb. 17, 2022	IRTC	S	87	$118.93	$10,347	53,198 Direct	-0.16%	Disposed	-0.3% (price as of 2026-08-19)
Feb. 17, 2022	IRTC	S	3,975	$121.04	$481,134	49,223 Direct	-7.47%	Disposed	-2.1% (price as of 2026-08-19)
Feb. 15, 2022	IRTC	A	6,018	—	—	46,133 Direct	+15.00%	Acquired	(price as of 2026-08-19)
Feb. 15, 2022	IRTC	A	7,152	—	—	53,285 Direct	+15.50%	Acquired	(price as of 2026-08-19)
March 1, 2021	IRTC	A	2,953	—	—	39,915 Direct	+7.99%	Acquired	(price as of 2026-08-19)
March 1, 2021	IRTC	F	2,518	$152.92	$385,053	36,962 Direct	-6.38%	Disposed	-22.5% (price as of 2026-08-19)
Feb. 23, 2021	IRTC	M	8,300	$17.00	$141,100	38,386 Direct	+27.59%	Acquired	597.3% (price as of 2026-08-19)
Feb. 23, 2021	IRTC	M	971	$36.22	$35,170	39,357 Direct	+2.53%	Acquired	227.3% (price as of 2026-08-19)
Feb. 23, 2021	IRTC	M	123	$63.95	$7,866	39,480 Direct	+0.31%	Acquired	85.4% (price as of 2026-08-19)
Feb. 23, 2021	IRTC	M	8,300	$17.00	$141,100	7,485 Direct	—	Acquired	597.3% (price as of 2026-08-19)
Feb. 23, 2021	IRTC	M	971	$36.22	$35,170	14,077 Direct	+7.41%	Acquired	227.3% (price as of 2026-08-19)
Feb. 23, 2021	IRTC	M	123	$63.95	$7,866	10,577 Direct	+1.18%	Acquired	85.4% (price as of 2026-08-19)
Jan. 17, 2021	IRTC	A	10,353	—	—	34,664 Direct	+42.59%	Acquired	(price as of 2026-08-19)
Jan. 17, 2021	IRTC	F	4,578	$250.57	$1,147,109	30,086 Direct	-13.21%	Disposed	-52.7% (price as of 2026-08-19)
Dec. 31, 2020	IRTC	M	2,298	$8.18	$18,798	22,811 Direct	+11.20%	Acquired	1349.1% (price as of 2026-08-19)
Dec. 31, 2020	IRTC	M	1,500	$17.00	$25,500	24,311 Direct	+6.58%	Acquired	597.3% (price as of 2026-08-19)
Dec. 31, 2020	IRTC	M	2,298	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
Dec. 31, 2020	IRTC	M	1,500	—	—	15,785 Direct	-8.68%	Disposed	(price as of 2026-08-19)
Oct. 1, 2020	IRTC	S 10b5-1	610	$226.59	$138,220	37,369 Direct	-1.61%	Disposed	-47.7% (price as of 2026-08-19)
Oct. 1, 2020	IRTC	S 10b5-1	2,280	$227.52	$518,746	35,089 Direct	-6.10%	Disposed	-47.9% (price as of 2026-08-19)
Oct. 1, 2020	IRTC	S 10b5-1	3,557	$228.68	$813,415	31,532 Direct	-10.14%	Disposed	-48.2% (price as of 2026-08-19)
Oct. 1, 2020	IRTC	S 10b5-1	4,406	$229.45	$1,010,957	27,126 Direct	-13.97%	Disposed	-48.3% (price as of 2026-08-19)
Oct. 1, 2020	IRTC	S 10b5-1	4,280	$230.36	$985,941	22,846 Direct	-15.78%	Disposed	-48.5% (price as of 2026-08-19)
Oct. 1, 2020	IRTC	S 10b5-1	8	$231.20	$1,850	22,838 Direct	-0.04%	Disposed	-48.7% (price as of 2026-08-19)
Oct. 1, 2020	IRTC	S 10b5-1	556	$235.11	$130,721	22,282 Direct	-2.43%	Disposed	-49.6% (price as of 2026-08-19)
Oct. 1, 2020	IRTC	S 10b5-1	1,146	$236.88	$271,464	21,136 Direct	-5.14%	Disposed	-50.0% (price as of 2026-08-19)
Oct. 1, 2020	IRTC	S 10b5-1	657	$238.48	$156,681	20,479 Direct	-3.11%	Disposed	-50.3% (price as of 2026-08-19)
Aug. 11, 2020	IRTC	S 10b5-1	436	$181.63	$79,191	42,543 Direct	-1.01%	Disposed	-34.7% (price as of 2026-08-19)
Aug. 11, 2020	IRTC	S 10b5-1	1,586	$182.96	$290,175	40,957 Direct	-3.73%	Disposed	-35.2% (price as of 2026-08-19)
Aug. 11, 2020	IRTC	S 10b5-1	2,335	$183.87	$429,336	38,622 Direct	-5.70%	Disposed	-35.5% (price as of 2026-08-19)
Aug. 11, 2020	IRTC	S 10b5-1	360	$184.96	$66,586	38,262 Direct	-0.93%	Disposed	-35.9% (price as of 2026-08-19)
Aug. 11, 2020	IRTC	S 10b5-1	40	$185.62	$7,425	38,222 Direct	-0.10%	Disposed	-36.1% (price as of 2026-08-19)
Aug. 11, 2020	IRTC	S 10b5-1	243	$187.70	$45,611	37,979 Direct	-0.64%	Disposed	-36.8% (price as of 2026-08-19)
March 1, 2020	IRTC	F	1,800	$86.97	$156,546	42,677 Direct	-4.05%	Disposed	36.3% (price as of 2026-08-19)
Feb. 25, 2020	IRTC	A	4,616	—	—	44,477 Direct	+11.58%	Acquired	(price as of 2026-08-19)
Dec. 31, 2019	IRTC	M	638	$5.82	$3,713	37,200 Direct	+1.74%	Acquired	1936.8% (price as of 2026-08-19)
Dec. 31, 2019	IRTC	M	2,661	$8.18	$21,767	39,861 Direct	+7.15%	Acquired	1349.1% (price as of 2026-08-19)
Dec. 31, 2019	IRTC	M	638	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
Dec. 31, 2019	IRTC	M	2,661	—	—	2,298 Direct	-53.66%	Disposed	(price as of 2026-08-19)

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
Aug. 3, 2023	IRTC	Employee Stock Option (right to buy)	Common Stock (486)	$36.22	Feb. 8, 2027	486	Disposed
Feb. 23, 2021	IRTC	Employee Stock Option (right to buy)	Common Stock (8,300)	$17.00	Oct. 20, 2026	8,300	Acquired
Feb. 23, 2021	IRTC	Employee Stock Option (right to buy)	Common Stock (971)	$36.22	Feb. 8, 2027	971	Acquired
Feb. 23, 2021	IRTC	Employee Stock Option (right to buy)	Common Stock (123)	$63.95	Feb. 27, 2028	123	Acquired
Dec. 31, 2020	IRTC	Employee Stock Option (right to buy)	Common Stock (2,298)	$8.18	Dec. 15, 2025	2,298	Disposed
Dec. 31, 2020	IRTC	Employee Stock Option (right to buy)	Common Stock (1,500)	$17.00	Oct. 20, 2026	1,500	Disposed
Dec. 31, 2019	IRTC	Employee Stock Option (right to buy)	Common Stock (638)	$5.82	Feb. 10, 2025	638	Disposed
Dec. 31, 2019	IRTC	Employee Stock Option (right to buy)	Common Stock (2,661)	$8.18	Dec. 15, 2025	2,661	Disposed

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

Initial ownership (Form 3) 6 holdings

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
March 27, 2019	IRTC	Common Stock	36,562	Direct
March 27, 2019	IRTC	Employee Stock Option (right to buy)→ Common Stock (638)	638	Direct
March 27, 2019	IRTC	Employee Stock Option (right to buy)→ Common Stock (4,959)	4,959	Direct
March 27, 2019	IRTC	Employee Stock Option (right to buy)→ Common Stock (17,285)	17,285	Direct
March 27, 2019	IRTC	Employee Stock Option (right to buy)→ Common Stock (15,048)	15,048	Direct
March 27, 2019	IRTC	Employee Stock Option (right to buy)→ Common Stock (10,700)	10,700	Direct