Kristine B Johnson

CIK 1231984 · View on SEC EDGAR ↗

Insider

First SEC filing: March 21, 2017 · Latest: March 21, 2017

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 + 69 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

69 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
May 21, 2026	CLPT	A	12,820	—	—	12,820 Direct	—	Acquired	(price as of 2026-08-21)
May 19, 2026	CLPT	M	12,417	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
May 19, 2026	CLPT	M	12,417	—	—	71,116 Direct	+21.15%	Acquired	(price as of 2026-08-21)
May 18, 2026	ATRC	A	6,144	—	—	55,954 Direct	+12.33%	Acquired	(price as of 2026-08-21)
May 22, 2025	CLPT	A	12,417	—	—	12,417 Direct	—	Acquired	(price as of 2026-08-21)
May 19, 2025	ATRC	A	5,401	—	—	49,810 Direct	+12.16%	Acquired	(price as of 2026-08-21)
May 16, 2025	CLPT	M	21,093	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
May 16, 2025	CLPT	M	21,093	—	—	58,699 Direct	+56.09%	Acquired	(price as of 2026-08-21)
May 16, 2024	CLPT	A	21,093	—	—	21,093 Direct	—	Acquired	(price as of 2026-08-21)
May 14, 2024	CLPT	M	17,153	—	—	37,606 Direct	+83.87%	Acquired	(price as of 2026-08-21)
May 14, 2024	CLPT	M	17,153	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
May 13, 2024	ATRC	A	7,788	—	—	44,409 Direct	+21.27%	Acquired	(price as of 2026-08-21)
May 25, 2023	ATRC	A	3,186	—	—	36,621 Direct	+9.53%	Acquired	(price as of 2026-08-21)
May 25, 2023	CLPT	A	17,153	—	—	17,153 Direct	—	Acquired	(price as of 2026-08-21)
Jan. 3, 2023	CLPT	A	431	$7.97	$3,435	20,453 Direct	+2.15%	Acquired	90.8% (price as of 2026-08-21)
Oct. 3, 2022	CLPT	A	337	$10.19	$3,434	20,022 Direct	+1.71%	Acquired	49.3% (price as of 2026-08-21)
July 1, 2022	CLPT	A	272	$12.63	$3,435	19,685 Direct	+1.40%	Acquired	20.4% (price as of 2026-08-21)
May 25, 2022	ATRC	A	3,564	—	—	33,435 Direct	+11.93%	Acquired	(price as of 2026-08-21)
April 1, 2022	CLPT	A	345	$9.96	$3,436	10,144 Direct	+3.52%	Acquired	52.7% (price as of 2026-08-21)
Jan. 1, 2022	CLPT	A	595	$11.54	$6,866	9,799 Direct	+6.46%	Acquired	31.8% (price as of 2026-08-21)
June 25, 2021	CLPT	A	6,006	—	—	6,006 Direct	—	Acquired	(price as of 2026-08-21)
June 25, 2021	CLPT	A	3,003	—	—	8,564 Direct	+54.00%	Acquired	(price as of 2026-08-21)
May 20, 2021	ATRC	A	1,749	—	—	29,871 Direct	+6.22%	Acquired	(price as of 2026-08-21)
June 30, 2020	CLPT	A	1,406	$3.55	$4,991	4,097 Direct	+52.25%	Acquired	328.5% (price as of 2026-08-21)
May 20, 2020	ATRC	A	2,452	—	—	28,122 Direct	+9.55%	Acquired	(price as of 2026-08-21)
Dec. 13, 2019	PIPR	A	9	$81.62	$735	11,794 Direct	+0.08%	Acquired	265.1% (price as of 2026-08-21)
Nov. 5, 2019	PIPR	G	1,752	—	—	2,578 Indirect	-40.46%	Disposed	(price as of 2026-08-21)
Sept. 13, 2019	PIPR	A	10	—	—	11,785 Direct	+0.08%	Acquired	(price as of 2026-08-21)
June 14, 2019	PIPR	A	10	$73.43	$734	11,775 Direct	+0.08%	Acquired	305.8% (price as of 2026-08-21)
May 22, 2019	ATRC	A	4,208	—	—	25,670 Direct	+19.61%	Acquired	(price as of 2026-08-21)
May 20, 2019	PIPR	A	1,149	$78.36	$90,036	11,765 Direct	+10.82%	Acquired	280.3% (price as of 2026-08-21)
March 15, 2019	PIPR	A	36	$72.63	$2,615	10,616 Direct	+0.34%	Acquired	310.3% (price as of 2026-08-21)
Dec. 14, 2018	PIPR	A	11	$66.64	$733	10,580 Direct	+0.10%	Acquired	347.1% (price as of 2026-08-21)
Sept. 14, 2018	PIPR	A	9	$77.00	$693	10,569 Direct	+0.09%	Acquired	287.0% (price as of 2026-08-21)
Aug. 6, 2018	PIPR	G	1,768	—	—	10,560 Direct	-14.34%	Disposed	(price as of 2026-08-21)
June 15, 2018	PIPR	A	9	$80.10	$721	12,328 Direct	+0.07%	Acquired	272.0% (price as of 2026-08-21)
May 31, 2018	ATRC	A	5,272	—	—	21,462 Direct	+32.56%	Acquired	(price as of 2026-08-21)
May 22, 2018	ATRC	A	5,221	—	—	16,190 Direct	+47.60%	Acquired	(price as of 2026-08-21)
May 17, 2018	PIPR	A	1,036	—	—	12,319 Direct	+9.18%	Acquired	(price as of 2026-08-21)
March 15, 2018	PIPR	A	42	$86.25	$3,622	11,283 Direct	+0.37%	Acquired	245.5% (price as of 2026-08-21)
Feb. 2, 2018	PIPR	G	1,558	—	—	11,241 Direct	-12.17%	Disposed	(price as of 2026-08-21)
Dec. 15, 2017	PIPR	A	7	$79.10	$554	12,799 Direct	+0.05%	Acquired	276.7% (price as of 2026-08-21)
Nov. 8, 2017	ATRC	P	1,500	$18.36	$27,540	10,969 Direct	+15.84%	Acquired	157.6% (price as of 2026-08-21)
Sept. 15, 2017	PIPR	A	10	$55.10	$551	12,792 Direct	+0.08%	Acquired	440.8% (price as of 2026-08-21)
June 15, 2017	PIPR	A	9	$61.80	$556	12,782 Direct	+0.07%	Acquired	382.2% (price as of 2026-08-21)
May 11, 2017	PIPR	A	1,158	—	—	12,773 Direct	+9.97%	Acquired	(price as of 2026-08-21)
March 21, 2017	ATRC	A	9,469	—	—	9,469 Direct	—	Acquired	(price as of 2026-08-21)
March 13, 2017	PIPR	A	9	$67.80	$610	11,615 Direct	+0.08%	Acquired	339.5% (price as of 2026-08-21)
Feb. 16, 2017	PIPR	G	1,100	—	—	11,606 Direct	-8.66%	Disposed	(price as of 2026-08-21)
Feb. 16, 2017	PIPR	G	1,100	—	—	11,606 Direct	+10.47%	Acquired	(price as of 2026-08-21)
Nov. 4, 2016	PIPR	S	1,425	$53.45	$76,166	12,706 Direct	-10.08%	Disposed	457.5% (price as of 2026-08-21)
Nov. 4, 2016	PIPR	S	1,425	$53.45	$76,166	12,706 Direct	+12.63%	Acquired	457.5% (price as of 2026-08-21)
May 4, 2016	PIPR	A	1,803	—	—	14,131 Direct	+14.63%	Acquired	(price as of 2026-08-21)
May 13, 2015	PIPR	A	1,425	—	—	11,585 Direct	+14.03%	Acquired	(price as of 2026-08-21)
May 7, 2014	PIPR	A	1,409	—	—	10,160 Direct	+16.10%	Acquired	(price as of 2026-08-21)
April 28, 2014	PIPR	M	5,713	$28.01	$160,021	14,464 Direct	+65.28%	Acquired	963.8% (price as of 2026-08-21)
April 28, 2014	PIPR	S	5,713	$43.64	$249,315	8,751 Direct	-39.50%	Disposed	582.8% (price as of 2026-08-21)
April 28, 2014	PIPR	M	5,713	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
May 8, 2013	PIPR	A	1,768	—	—	8,751 Direct	+25.32%	Acquired	(price as of 2026-08-21)
May 9, 2012	PIPR	A	2,658	—	—	6,983 Direct	+61.46%	Acquired	(price as of 2026-08-21)
May 4, 2011	PIPR	A	1,752	—	—	4,325 Direct	+68.09%	Acquired	(price as of 2026-08-21)
May 5, 2010	PIPR	A	1,573	—	—	2,573 Direct	+157.30%	Acquired	(price as of 2026-08-21)
Jan. 29, 2010	PIPR	G	2,000	—	—	1,000 Direct	-66.67%	Disposed	(price as of 2026-08-21)
Jan. 29, 2010	PIPR	G	2,000	—	—	4,330 Indirect	+85.84%	Acquired	(price as of 2026-08-21)
May 7, 2009	PIPR	A	1,000	—	—	3,000 Direct	+50.00%	Acquired	(price as of 2026-08-21)
Oct. 20, 2008	PIPR	P	700	$32.34	$22,638	700 Indirect	—	Acquired	821.4% (price as of 2026-08-21)
Oct. 20, 2008	PIPR	P	1,630	$32.37	$52,763	2,330 Indirect	+232.86%	Acquired	820.5% (price as of 2026-08-21)
May 7, 2008	PIPR	A	1,000	—	—	2,000 Direct	+100.00%	Acquired	(price as of 2026-08-21)
Nov. 14, 2007	PIPR	P	182	$46.26	$8,419	982 Indirect	+22.75%	Acquired	544.1% (price as of 2026-08-21)
Nov. 14, 2007	PIPR	P	100	$46.30	$4,630	1,082 Indirect	+10.18%	Acquired	543.6% (price as of 2026-08-21)
Nov. 14, 2007	PIPR	P	118	$46.31	$5,465	1,200 Indirect	+10.91%	Acquired	543.4% (price as of 2026-08-21)
May 2, 2007	PIPR	A	1,000	—	—	1,000 Direct	—	Acquired	(price as of 2026-08-21)
Jan. 3, 2007	PIPR	A	743	$67.35	$50,041	743 Direct	—	Acquired	342.4% (price as of 2026-08-21)
May 2, 2006	PIPR	A	1,962	—	—	1,962 Direct	—	Acquired	(price as of 2026-08-21)
April 27, 2005	PIPR	P	300	$27.96	$8,388	800 Indirect	+60.00%	Acquired	965.7% (price as of 2026-08-21)
April 27, 2005	PIPR	A	5,713	—	—	5,713 Direct	—	Acquired	(price as of 2026-08-21)
Nov. 4, 2004	PIPR	P	500	$44.15	$22,075	500 Indirect	—	Acquired	574.9% (price as of 2026-08-21)
April 28, 2004	PIPR	A	2,977	—	—	2,977 Direct	—	Acquired	(price as of 2026-08-21)
Feb. 12, 2004	PIPR	A	1,228	—	—	1,228 Direct	—	Acquired	(price as of 2026-08-21)
Feb. 12, 2004	PIPR	A	835	—	—	835 Direct	—	Acquired	(price as of 2026-08-21)

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
May 21, 2026	CLPT	Restricted Stock Units	Common Stock (12,820)	—	—	12,820	Acquired
May 19, 2026	CLPT	Restricted Stock Units	Common Stock (12,417)	—	—	12,417	Disposed
May 22, 2025	CLPT	Restricted Stock Units	Common Stock (12,417)	—	—	12,417	Acquired
May 16, 2025	CLPT	Restricted Stock Units	Common Stock (21,093)	—	—	21,093	Disposed
May 16, 2024	CLPT	Restricted Stock Units	Common Stock (21,093)	—	—	21,093	Acquired
May 14, 2024	CLPT	Restricted Stock Units	Common Stock (17,153)	—	—	17,153	Disposed
May 25, 2023	CLPT	Restricted Stock Units	Common Stock (17,153)	—	—	17,153	Acquired
June 25, 2021	CLPT	Stock Options (right to buy)	Common Stock (6,006)	$19.98	June 25, 2031	6,006	Acquired
April 28, 2014	PIPR	Stock Option (right to buy)	Common Stock (5,713)	$28.01	April 27, 2015	5,713	Disposed
Jan. 3, 2007	PIPR	Phantom Stock	Common Stock (743)	—	—	743	Acquired
May 2, 2006	PIPR	Stock Option (Right to Buy)	Common Stock (1,962)	$70.65	May 2, 2016	1,962	Acquired
April 27, 2005	PIPR	Stock Option (Right to Buy)	Common Stock (5,713)	$28.01	April 27, 2015	5,713	Acquired
April 28, 2004	PIPR	Stock Option (Right to Buy)	Common Stock (2,977)	$49.80	April 28, 2014	2,977	Acquired
Feb. 12, 2004	PIPR	Stock Option (right to buy)	Common Stock (1,228)	$51.05	Feb. 12, 2014	1,228	Acquired
Feb. 12, 2004	PIPR	Stock Option (right to buy)	Common Stock (835)	$51.05	Feb. 12, 2014	835	Acquired

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

Initial ownership (Form 3) 2 holdings

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

Date	Ticker	Security	Shares	Ownership
March 21, 2017	ATRC	Common Stock	0	Direct
Jan. 30, 2004	PIPR	Common Stock	0	Direct