Ralph Snyderman

Insider

First SEC filing: Dec. 13, 2007 · Latest: Dec. 13, 2007

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

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 91 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

91 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
May 28, 2025	IRTC	A	1,358	—	—	13,288 Direct	+11.38%	Acquired	(price as of 2026-08-20)
May 29, 2024	IRTC	A	1,841	—	—	11,930 Direct	+18.25%	Acquired	(price as of 2026-08-20)
May 24, 2023	IRTC	A	1,396	—	—	10,089 Direct	+16.06%	Acquired	(price as of 2026-08-20)
May 24, 2023	IRTC	A	1,164	—	—	9,857 Direct	+13.39%	Acquired	(price as of 2026-08-20)
Oct. 4, 2022	CDNA	A	775	—	—	58,177 Direct	+1.35%	Acquired	(price as of 2026-08-20)
July 1, 2022	CDNA	A	397	—	—	57,402 Direct	+0.70%	Acquired	(price as of 2026-08-20)
June 16, 2022	CDNA	A	7,606	—	—	7,606 Direct	—	Acquired	(price as of 2026-08-20)
June 16, 2022	CDNA	A	4,863	—	—	57,005 Direct	+9.33%	Acquired	(price as of 2026-08-20)
May 26, 2022	IRTC	A	1,155	—	—	8,693 Direct	+15.32%	Acquired	(price as of 2026-08-20)
June 18, 2021	IRTC	A	2,226	—	—	7,538 Direct	+41.91%	Acquired	(price as of 2026-08-20)
June 16, 2021	CDNA	A	1,812	—	—	1,812 Direct	—	Acquired	(price as of 2026-08-20)
June 16, 2021	CDNA	A	1,127	—	—	52,142 Direct	+2.21%	Acquired	(price as of 2026-08-20)
June 2, 2021	CDNA	S	2,511	$81.57	$204,822	51,015 Direct	-4.69%	Disposed	-42.1% (price as of 2026-08-20)
June 1, 2021	CDNA	S	2,512	$77.30	$194,178	53,526 Direct	-4.48%	Disposed	-38.9% (price as of 2026-08-20)
May 28, 2021	CDNA	S	2,511	$81.08	$203,592	56,038 Direct	-4.29%	Disposed	-41.7% (price as of 2026-08-20)
May 27, 2021	CDNA	S	1,966	$81.01	$159,266	58,549 Direct	-3.25%	Disposed	-41.7% (price as of 2026-08-20)
Jan. 15, 2021	CDNA	S	12,000	$88.88	$1,066,560	72,672 Direct	-14.17%	Disposed	-46.8% (price as of 2026-08-20)
Jan. 4, 2021	CDNA	A	215	—	—	84,672 Direct	+0.25%	Acquired	(price as of 2026-08-20)
Oct. 1, 2020	CDNA	A	370	—	—	84,457 Direct	+0.44%	Acquired	(price as of 2026-08-20)
July 1, 2020	CDNA	A	439	—	—	84,087 Direct	+0.52%	Acquired	(price as of 2026-08-20)
June 19, 2020	IRTC	A	1,056	—	—	5,312 Direct	+24.81%	Acquired	(price as of 2026-08-20)
June 18, 2020	CDNA	A	4,978	$31.35	$156,060	4,978 Direct	—	Acquired	50.7% (price as of 2026-08-20)
June 18, 2020	CDNA	A	3,190	—	—	83,091 Direct	+3.99%	Acquired	(price as of 2026-08-20)
May 12, 2020	IRTC	S	250	$134.55	$33,638	4,256 Direct	-5.55%	Disposed	-6.2% (price as of 2026-08-20)
April 1, 2020	CDNA	A	557	—	—	80,458 Direct	+0.70%	Acquired	(price as of 2026-08-20)
March 4, 2020	IRTC	S	650	$98.85	$64,252	4,506 Direct	-12.61%	Disposed	27.7% (price as of 2026-08-20)
March 3, 2020	CDNA	M	14,598	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
March 3, 2020	CDNA	M	14,598	$3.70	$54,013	79,901 Direct	+22.35%	Acquired	1177.0% (price as of 2026-08-20)
Jan. 2, 2020	CDNA	A	653	—	—	65,303 Direct	+1.01%	Acquired	(price as of 2026-08-20)
Oct. 1, 2019	CDNA	A	541	—	—	64,650 Direct	+0.84%	Acquired	(price as of 2026-08-20)
July 1, 2019	CDNA	A	312	—	—	64,109 Direct	+0.49%	Acquired	(price as of 2026-08-20)
June 17, 2019	CDNA	A	4,152	$38.26	$158,856	4,152 Direct	—	Acquired	23.5% (price as of 2026-08-20)
June 17, 2019	CDNA	A	2,613	—	—	63,797 Direct	+4.27%	Acquired	(price as of 2026-08-20)
May 22, 2019	IRTC	A	1,764	—	—	5,156 Direct	+52.00%	Acquired	(price as of 2026-08-20)
April 17, 2019	IRTC	M	250	—	—	3,839 Direct	-6.11%	Disposed	(price as of 2026-08-20)
April 17, 2019	IRTC	M	250	$41.04	$10,260	3,392 Direct	+7.96%	Acquired	207.6% (price as of 2026-08-20)
April 1, 2019	CDNA	A	343	—	—	61,184 Direct	+0.56%	Acquired	(price as of 2026-08-20)
Jan. 2, 2019	CDNA	A	356	—	—	70,841 Direct	+0.51%	Acquired	(price as of 2026-08-20)
Oct. 1, 2018	CDNA	A	489	—	—	70,485 Direct	+0.70%	Acquired	(price as of 2026-08-20)
June 29, 2018	CDNA	A	1,197	—	—	69,996 Direct	+1.74%	Acquired	(price as of 2026-08-20)
June 20, 2018	CDNA	A	15,000	—	—	15,000 Direct	—	Acquired	(price as of 2026-08-20)
June 20, 2018	CDNA	A	5,000	—	—	68,799 Direct	+7.84%	Acquired	(price as of 2026-08-20)
May 23, 2018	IRTC	A	1,193	—	—	3,142 Direct	+61.21%	Acquired	(price as of 2026-08-20)
April 2, 2018	CDNA	A	2,221	—	—	63,799 Direct	+3.61%	Acquired	(price as of 2026-08-20)
Jan. 2, 2018	CDNA	A	1,924	—	—	61,578 Direct	+3.23%	Acquired	(price as of 2026-08-20)
Nov. 9, 2017	CDNA	A	6,679	—	—	6,679 Direct	—	Acquired	(price as of 2026-08-20)
Nov. 8, 2017	CDNA	D	10,948	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Oct. 2, 2017	CDNA	A	5,713	—	—	59,654 Direct	+10.59%	Acquired	(price as of 2026-08-20)
July 17, 2017	IRTC	A	4,089	—	—	4,089 Direct	—	Acquired	(price as of 2026-08-20)
July 17, 2017	IRTC	A	1,949	—	—	1,949 Direct	—	Acquired	(price as of 2026-08-20)
July 13, 2017	CDNA	A	15,000	$1.22	$18,300	15,000 Direct	—	Acquired	3773.0% (price as of 2026-08-20)
July 13, 2017	CDNA	A	5,000	—	—	53,941 Direct	+10.22%	Acquired	(price as of 2026-08-20)
July 3, 2017	CDNA	A	7,534	—	—	48,941 Direct	+18.19%	Acquired	(price as of 2026-08-20)
April 1, 2017	CDNA	A	5,384	—	—	41,407 Direct	+14.95%	Acquired	(price as of 2026-08-20)
Jan. 1, 2017	CDNA	A	3,463	—	—	36,023 Direct	+10.64%	Acquired	(price as of 2026-08-20)
Oct. 1, 2016	CDNA	A	2,614	—	—	32,560 Direct	+8.73%	Acquired	(price as of 2026-08-20)
July 15, 2016	CDNA	A	9,745	$4.95	$48,238	9,745 Direct	—	Acquired	854.5% (price as of 2026-08-20)
July 15, 2016	CDNA	A	5,000	—	—	29,946 Direct	+20.04%	Acquired	(price as of 2026-08-20)
July 1, 2016	CDNA	A	1,653	—	—	24,946 Direct	+7.10%	Acquired	(price as of 2026-08-20)
June 16, 2016	CDNA	A	5,255	$5.02	$26,380	5,255 Direct	—	Acquired	841.2% (price as of 2026-08-20)
April 1, 2016	CDNA	A	2,247	—	—	23,293 Direct	+10.68%	Acquired	(price as of 2026-08-20)
Jan. 1, 2016	CDNA	A	2,112	—	—	21,046 Direct	+11.15%	Acquired	(price as of 2026-08-20)
Oct. 1, 2015	CDNA	A	1,739	—	—	18,934 Direct	+10.11%	Acquired	(price as of 2026-08-20)
July 1, 2015	CDNA	A	2,117	—	—	17,195 Direct	+14.04%	Acquired	(price as of 2026-08-20)
June 17, 2015	CDNA	A	5,255	—	—	5,255 Direct	-50.00%	Disposed	(price as of 2026-08-20)
June 16, 2015	CDNA	A	5,255	$6.08	$31,950	5,255 Direct	—	Acquired	677.1% (price as of 2026-08-20)
April 22, 2015	CDNA	M	11,678	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
April 22, 2015	CDNA	M	11,678	$2.33	$27,210	15,078 Direct	+343.47%	Acquired	1927.9% (price as of 2026-08-20)
April 1, 2015	CDNA	A	1,440	—	—	3,400 Direct	+73.47%	Acquired	(price as of 2026-08-20)
Jan. 1, 2015	CDNA	A	1,417	—	—	1,960 Direct	+260.96%	Acquired	(price as of 2026-08-20)
Oct. 1, 2014	CDNA	A	543	—	—	543 Direct	—	Acquired	(price as of 2026-08-20)
July 21, 2014	CDNA	A	5,255	—	—	5,255 Direct	—	Acquired	(price as of 2026-08-20)
June 7, 2012	GYRE	A	7,500	—	—	7,500 Direct	—	Acquired	(price as of 2026-08-20)
June 15, 2011	GYRE	A	7,500	—	—	7,500 Direct	—	Acquired	(price as of 2026-08-20)
June 17, 2010	GYRE	A	7,500	—	—	7,500 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 16, 2010	GYRE	M	7,500	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Feb. 16, 2010	GYRE	M	7,500	—	—	17,500 Direct	-30.00%	Disposed	(price as of 2026-08-20)
Feb. 16, 2010	GYRE	S	15,000	$19.92	$298,800	0 Direct	-100.00%	Disposed	-100.0% (price as of 2026-08-20)
Feb. 16, 2010	GYRE	M	7,500	$7.10	$53,250	15,000 Direct	+100.00%	Acquired	-99.9% (price as of 2026-08-20)
Feb. 16, 2010	GYRE	M	7,500	$9.27	$69,525	7,500 Direct	—	Acquired	-100.0% (price as of 2026-08-20)
Oct. 13, 2009	PG	A	2,184	—	—	46,478 Direct	+4.93%	Acquired	(price as of 2026-08-20)
June 17, 2009	GYRE	A	7,500	—	—	7,500 Direct	—	Acquired	(price as of 2026-08-20)
Dec. 9, 2008	PG	A	594	—	—	43,977 Direct	+1.37%	Acquired	(price as of 2026-08-20)
Oct. 14, 2008	PG	A	1,951	—	—	43,306 Direct	+4.72%	Acquired	(price as of 2026-08-20)
Sept. 16, 2008	PG	A	466	—	—	41,355 Direct	+1.14%	Acquired	(price as of 2026-08-20)
July 2, 2008	GYRE	A	7,500	—	—	7,500 Direct	—	Acquired	(price as of 2026-08-20)
June 10, 2008	PG	A	443	—	—	40,830 Direct	+1.10%	Acquired	(price as of 2026-08-20)
March 11, 2008	PG	A	503	—	—	40,324 Direct	+1.26%	Acquired	(price as of 2026-08-20)
Feb. 6, 2008	PG	M	4,030	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Feb. 6, 2008	PG	M	4,030	$41.97	$169,139	39,767 Direct	+11.28%	Acquired	243.9% (price as of 2026-08-20)
Dec. 11, 2007	PG	A	400	—	—	35,737 Direct	+1.13%	Acquired	(price as of 2026-08-20)
Oct. 9, 2007	PG	A	1,759	—	—	35,287 Direct	+5.25%	Acquired	(price as of 2026-08-20)
Sept. 11, 2007	PG	A	437	—	—	33,528 Direct	+1.32%	Acquired	(price as of 2026-08-20)
June 20, 2007	GYRE	A	25,000	—	—	25,000 Direct	—	Acquired	(price as of 2026-08-20)
June 12, 2007	PG	A	407	—	—	33,045 Direct	+1.25%	Acquired	(price as of 2026-08-20)
March 13, 2007	PG	A	446	—	—	32,590 Direct	+1.39%	Acquired	(price as of 2026-08-20)
Feb. 7, 2007	PG	M	4,030	$29.88	$120,416	0 Direct	-100.00%	Disposed	383.0% (price as of 2026-08-20)
Feb. 7, 2007	PG	S	4,030	$64.43	$259,653	32,104 Direct	-11.15%	Disposed	124.0% (price as of 2026-08-20)
Feb. 7, 2007	PG	M	4,030	$29.88	$120,416	36,134 Direct	+12.55%	Acquired	383.0% (price as of 2026-08-20)
Dec. 12, 2006	PG	A	428	—	—	32,104 Direct	+1.35%	Acquired	(price as of 2026-08-20)

Showing latest 100 of 121 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
June 16, 2022	CDNA	Common Stock	Common Stock (7,606)	$20.56	June 16, 2032	7,606	Acquired
June 16, 2021	CDNA	Stock Option (right to buy)	Common Stock (1,812)	$88.70	June 16, 2031	1,812	Acquired
June 18, 2020	CDNA	Stock Option (right to buy)	Common Stock (4,978)	$31.35	June 18, 2030	4,978	Acquired
March 3, 2020	CDNA	Employee Stock Option (right to buy)	Common Stock (14,598)	$3.70	April 8, 2020	14,598	Disposed
June 17, 2019	CDNA	Stock Option (right to buy)	Common Stock (4,152)	$38.26	June 17, 2029	4,152	Acquired
April 17, 2019	IRTC	Stock Option (right to buy)	Common Stock (250)	$41.04	July 17, 2027	250	Disposed
June 20, 2018	CDNA	Stock Option (right to buy)	Common Stock (15,000)	$14.74	June 20, 2028	15,000	Acquired
Nov. 9, 2017	CDNA	Option to Purchase Common Stock [F3]	Common Stock (6,679)	—	Nov. 9, 2024	6,679	Acquired
Nov. 8, 2017	CDNA	Option to Purchase Common Stock	Common Stock (10,948)	$12.40	June 19, 2024	10,948	Disposed
July 17, 2017	IRTC	Employee Stock Option (right to buy)	Common Stock (4,089)	$41.04	July 17, 2027	4,089	Acquired
July 13, 2017	CDNA	Stock Option (right to buy)	Common Stock (15,000)	$1.22	July 13, 2027	15,000	Acquired
July 15, 2016	CDNA	Stock Option (right to buy)	Common Stock (9,745)	$4.95	July 15, 2026	9,745	Acquired
June 16, 2016	CDNA	Stock Option (right to buy)	Common Stock (5,255)	$5.02	June 16, 2026	5,255	Acquired
June 17, 2015	CDNA	Stock Option (right to buy)	Common Stock (5,255)	—	June 17, 2025	5,255	Disposed
June 16, 2015	CDNA	Stock Option (right to buy)	Common Stock (5,255)	$6.08	June 16, 2025	5,255	Acquired
April 22, 2015	CDNA	Option to Purchase Common Stock	Common Stock (11,678)	$2.33	April 27, 2015	11,678	Disposed
July 21, 2014	CDNA	Option to Purchase Common Stock	Common Stock (5,255)	$10.00	July 21, 2024	5,255	Acquired
June 7, 2012	GYRE	Stock Option (Right to Buy)	Common Stock (7,500)	$4.16	June 6, 2022	7,500	Acquired
June 15, 2011	GYRE	Stock Option (Right to Buy)	Common Stock (7,500)	$21.25	June 14, 2021	7,500	Acquired
June 17, 2010	GYRE	Stock Option (Right to Buy)	Common Stock (7,500)	$22.76	June 16, 2020	7,500	Acquired
Feb. 16, 2010	GYRE	Stock Option (Right to Buy)	Common Stock (7,500)	$7.10	July 1, 2018	7,500	Disposed
Feb. 16, 2010	GYRE	Stock Option (Right to Buy)	Common Stock (7,500)	$9.27	June 19, 2017	7,500	Disposed
June 17, 2009	GYRE	Stock Option (Right to Buy)	Common Stock (7,500)	$2.71	June 16, 2019	7,500	Acquired
July 2, 2008	GYRE	Stock Option (Right to Buy)	Common Stock (7,500)	$7.10	July 1, 2018	7,500	Acquired
Feb. 6, 2008	PG	Stock Option (Right to Buy)	Common Stock (4,030)	$41.97	Feb. 27, 2008	4,030	Disposed
June 20, 2007	GYRE	Stock Option (Right to Buy)	Common Stock (25,000)	$9.27	June 19, 2017	25,000	Acquired
Feb. 7, 2007	PG	Stock Option (right to buy)	Common Stock (4,030)	$29.88	Feb. 28, 2007	4,030	Disposed
Feb. 13, 2006	PG	Stock Option (right to buy)	Common Stock (4,030)	$20.30	March 1, 2006	4,030	Disposed

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

Initial ownership (Form 3) 3 holdings

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

Date	Ticker	Security	Shares	Ownership
July 16, 2014	CDNA	Option to Purchase Common Stock→ Common Stock (11,678)	11,678	Direct
July 16, 2014	CDNA	Option to Purchase Common Stock→ Common Stock (14,598)	14,598	Direct
July 16, 2014	CDNA	Option to Purchase Common Stock→ Common Stock (10,948)	10,948	Direct