Ronald Frost

Insider

First SEC filing: July 31, 2019 · Latest: July 31, 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

MMSI selling Aug. 10, 2022

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 36 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

36 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Aug. 10, 2022	MMSI	M	20,000	$16.05	$321,000	35,144 Direct	+132.07%	Acquired	459.5% (price as of 2026-08-21)
Aug. 10, 2022	MMSI	S	20,000	$62.10	$1,242,000	15,144 Direct	-56.91%	Disposed	44.6% (price as of 2026-08-21)
Aug. 10, 2022	MMSI	M	20,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Feb. 28, 2022	MMSI	F	1,942	$65.03	$126,288	15,144 Direct	-11.37%	Disposed	38.1% (price as of 2026-08-21)
Feb. 26, 2022	MMSI	A	6,630	—	—	17,086 Direct	+63.41%	Acquired	(price as of 2026-08-21)
Feb. 26, 2022	MMSI	A	8,094	—	—	8,094 Direct	—	Acquired	(price as of 2026-08-21)
June 15, 2021	MMSI	M	20,000	$17.27	$345,400	22,343 Direct	+853.61%	Acquired	420.0% (price as of 2026-08-21)
June 15, 2021	MMSI	S	11,887	$61.82	$734,854	10,456 Direct	-53.20%	Disposed	45.3% (price as of 2026-08-21)
June 15, 2021	MMSI	M	20,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
March 19, 2021	MMSI	A	9,681	—	—	9,681 Direct	—	Acquired	(price as of 2026-08-21)
March 16, 2021	MMSI	S	5,000	$60.60	$303,000	2,343 Direct	-68.09%	Disposed	48.2% (price as of 2026-08-21)
March 12, 2021	MMSI	M	25,000	$12.06	$301,500	32,343 Direct	+340.46%	Acquired	644.7% (price as of 2026-08-21)
March 12, 2021	MMSI	S	25,000	$59.58	$1,489,500	7,343 Direct	-77.30%	Disposed	50.7% (price as of 2026-08-21)
March 12, 2021	MMSI	M	25,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Feb. 26, 2021	MMSI	A	3,315	—	—	8,315 Direct	+66.30%	Acquired	(price as of 2026-08-21)
Feb. 26, 2021	MMSI	F	972	$55.72	$54,160	7,343 Direct	-11.69%	Disposed	61.2% (price as of 2026-08-21)
Feb. 26, 2020	MMSI	A	7,955	—	—	7,955 Direct	—	Acquired	(price as of 2026-08-21)
Feb. 26, 2020	MMSI	A	16,722	—	—	16,722 Direct	—	Acquired	(price as of 2026-08-21)
July 30, 2019	MMSI	P	5,000	$40.00	$200,000	5,000 Direct	—	Acquired	124.5% (price as of 2026-08-21)
March 1, 2019	MMSI	A	30,000	—	—	30,000 Direct	—	Acquired	(price as of 2026-08-21)
Nov. 16, 2018	MMSI	M	4,743	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Nov. 16, 2018	MMSI	S	4,743	$61.30	$290,746	0 Direct	-100.00%	Disposed	46.5% (price as of 2026-08-21)
Nov. 16, 2018	MMSI	M	4,743	$13.14	$62,323	4,743 Direct	—	Acquired	583.4% (price as of 2026-08-21)
Nov. 7, 2018	MMSI	M	5,257	—	—	4,743 Direct	-52.57%	Disposed	(price as of 2026-08-21)
Nov. 7, 2018	MMSI	S	5,257	$61.31	$322,307	0 Direct	-100.00%	Disposed	46.5% (price as of 2026-08-21)
Nov. 7, 2018	MMSI	M	5,257	$13.14	$69,077	5,257 Direct	—	Acquired	583.4% (price as of 2026-08-21)
March 2, 2018	MMSI	A	40,000	—	—	40,000 Direct	—	Acquired	(price as of 2026-08-21)
April 14, 2017	MMSI	A	50,000	—	—	50,000 Direct	—	Acquired	(price as of 2026-08-21)
Dec. 9, 2016	MMSI	M	15,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Dec. 9, 2016	MMSI	S	15,000	$26.25	$393,750	0 Direct	-100.00%	Disposed	242.1% (price as of 2026-08-21)
Dec. 9, 2016	MMSI	M	15,000	$13.75	$206,250	15,000 Direct	—	Acquired	553.1% (price as of 2026-08-21)
Jan. 28, 2016	MMSI	A	20,000	—	—	20,000 Direct	—	Acquired	(price as of 2026-08-21)
March 16, 2015	MMSI	M	3,351	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
March 16, 2015	MMSI	S	3,351	$19.50	$65,344	0 Direct	-100.00%	Disposed	360.5% (price as of 2026-08-21)
March 16, 2015	MMSI	M	3,351	$11.53	$38,637	3,351 Direct	—	Acquired	678.9% (price as of 2026-08-21)
March 13, 2015	MMSI	M	2,633	—	—	3,351 Direct	-44.00%	Disposed	(price as of 2026-08-21)
March 13, 2015	MMSI	S	2,633	$19.50	$51,344	0 Direct	-100.00%	Disposed	360.5% (price as of 2026-08-21)
March 13, 2015	MMSI	M	2,633	$11.53	$30,358	2,633 Direct	—	Acquired	678.9% (price as of 2026-08-21)
March 12, 2015	MMSI	M	5,266	—	—	5,984 Direct	-46.81%	Disposed	(price as of 2026-08-21)
March 12, 2015	MMSI	S	5,266	$19.50	$102,687	0 Direct	-100.00%	Disposed	360.5% (price as of 2026-08-21)
March 12, 2015	MMSI	M	5,266	$11.53	$60,717	5,266 Direct	—	Acquired	678.9% (price as of 2026-08-21)
Feb. 13, 2015	MMSI	A	20,000	—	—	20,000 Direct	—	Acquired	(price as of 2026-08-21)
Oct. 4, 2014	MMSI	A	25,000	—	—	25,000 Direct	—	Acquired	(price as of 2026-08-21)
June 19, 2014	MMSI	M	5,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
June 19, 2014	MMSI	S	5,000	$14.25	$71,250	0 Direct	-100.00%	Disposed	530.2% (price as of 2026-08-21)
June 19, 2014	MMSI	M	5,000	$9.70	$48,500	5,000 Direct	—	Acquired	825.8% (price as of 2026-08-21)
June 3, 2014	MMSI	M	2,325	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
June 3, 2014	MMSI	S	2,325	$14.07	$32,713	0 Direct	-100.00%	Disposed	538.3% (price as of 2026-08-21)
June 3, 2014	MMSI	M	2,325	$11.05	$25,691	2,325 Direct	—	Acquired	712.7% (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
Aug. 10, 2022	MMSI	Non-qualified stock options (right to buy)	Common stock (20,000)	$16.05	Jan. 28, 2023	20,000	Disposed
Feb. 26, 2022	MMSI	Non-qualified stock options (right to buy)	Common Stock (8,094)	$65.03	Feb. 28, 2029	8,094	Acquired
June 15, 2021	MMSI	Non-qualified stock options (right to buy)	Common Stock (20,000)	$17.27	Feb. 13, 2022	20,000	Disposed
March 19, 2021	MMSI	Non-qualified stock options (right to buy)	Common Stock (9,681)	$56.25	March 19, 2028	9,681	Acquired
March 12, 2021	MMSI	Non-qualified stock options (right to buy)	Common Stock (25,000)	$12.06	Oct. 4, 2021	25,000	Disposed
Feb. 26, 2020	MMSI	Performance Stock Units	Common Stock (7,955)	—	March 15, 2023	7,955	Acquired
Feb. 26, 2020	MMSI	Non-qualified stock options (right to buy)	Common Stock (16,722)	$37.71	Feb. 26, 2027	16,722	Acquired
March 1, 2019	MMSI	Non-qualified stock options (right to buy)	Common Stock (30,000)	$55.73	March 1, 2026	30,000	Acquired
Nov. 16, 2018	MMSI	Non-qualified stock options (right to buy)	Common Stock (4,743)	$13.14	July 31, 2020	4,743	Disposed
Nov. 7, 2018	MMSI	Non-qualified stock options (right to buy)	Common Stock (5,257)	$13.14	July 31, 2020	5,257	Disposed
March 2, 2018	MMSI	Non-qualified stock options (right to buy)	Common Stock (40,000)	$44.80	March 2, 2025	40,000	Acquired
April 14, 2017	MMSI	Non-qualified stock options (right to buy)	Common Stock (50,000)	$28.20	April 14, 2024	50,000	Acquired
Dec. 9, 2016	MMSI	Non-qualified stock options (right to buy)	Common Stock (15,000)	$13.75	Aug. 11, 2018	15,000	Disposed
Jan. 28, 2016	MMSI	Non-qualified stock options (right to buy)	Common Stock (20,000)	$16.05	Jan. 28, 2023	20,000	Acquired
March 16, 2015	MMSI	Non-qualified stock options (right to buy)	Common Stock (3,351)	$11.53	May 21, 2015	3,351	Disposed
March 13, 2015	MMSI	Non-qualified stock options (right to buy)	Common Stock (5,984)	$11.53	May 21, 2015	2,633	Disposed
March 12, 2015	MMSI	Non-qualified stock options (right to buy)	Common Stock (11,250)	$11.53	May 21, 2015	5,266	Disposed
Feb. 13, 2015	MMSI	Non-qualified stock options (right to buy)	Common Stock (20,000)	$17.27	Feb. 13, 2022	20,000	Acquired
Oct. 4, 2014	MMSI	Non-qualified stock options (right to buy)	Common Stock (25,000)	$12.06	Oct. 4, 2021	25,000	Acquired
June 19, 2014	MMSI	Non-qualified stock options (right to buy)	Common Stock (5,000)	$9.70	June 27, 2014	5,000	Disposed
June 3, 2014	MMSI	Non-qualified stock options (right to buy)	Common Stock (2,325)	$11.05	June 10, 2014	2,325	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
Jan. 9, 2014	MMSI	Common Stock, No Par Value	15,635	Indirect
Jan. 9, 2014	MMSI	Non-qualified stock options (right to buy)→ Common Stock (2,325)	2,325	Direct
Jan. 9, 2014	MMSI	Non-qualified stock options (right to buy)→ Common Stock (5,000)	5,000	Direct
Jan. 9, 2014	MMSI	Non-qualified stock options (right to buy)→ Common Stock (11,250)	11,250	Direct
Jan. 9, 2014	MMSI	Non-qualified stock options (right to buy)→ Common Stock (15,000)	15,000	Direct
Jan. 9, 2014	MMSI	Non-qualified stock options (right to buy)→ Common Stock (10,000)	10,000	Direct