Dennis M Lanfear

CIK 1420822 · View on SEC EDGAR ↗

Insider

First SEC filing: June 2, 2026 · Latest: June 2, 2026

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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.
Compensation Executive pay disclosed in company proxy statements.

Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 54 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

54 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
May 29, 2026	CHRS	A	225,000	—	—	225,000 Direct	—	Acquired	(price as of 2026-08-20)
May 29, 2026	CHRS	A	402,500	—	—	402,500 Direct	—	Acquired	(price as of 2026-08-20)
May 29, 2026	CHRS	A	402,500	—	—	402,500 Direct	—	Acquired	(price as of 2026-08-20)
May 29, 2026	CHRS	A	125,000	—	—	125,000 Direct	—	Acquired	(price as of 2026-08-20)
May 29, 2026	CHRS	A	500,000	—	—	500,000 Direct	—	Acquired	(price as of 2026-08-20)
May 29, 2026	CHRS	A	500,000	—	—	500,000 Direct	—	Acquired	(price as of 2026-08-20)
May 29, 2026	CHRS	A	450,000	—	—	450,000 Direct	—	Acquired	(price as of 2026-08-20)
May 29, 2026	CHRS	A	400,000	—	—	400,000 Direct	—	Acquired	(price as of 2026-08-20)
May 29, 2026	CHRS	A	200,000	—	—	200,000 Direct	—	Acquired	(price as of 2026-08-20)
May 29, 2026	CHRS	D	225,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 29, 2026	CHRS	D	402,500	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 29, 2026	CHRS	D	402,500	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 29, 2026	CHRS	D	125,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 29, 2026	CHRS	D	500,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 29, 2026	CHRS	D	500,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 29, 2026	CHRS	D	450,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 29, 2026	CHRS	D	400,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 29, 2026	CHRS	D	200,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Jan. 11, 2019	CHRS	A	450,000	—	—	450,000 Direct	—	Acquired	(price as of 2026-08-20)
Jan. 11, 2019	CHRS	F	17,867	$12.37	$221,015	125,017 Direct	-12.50%	Disposed	-89.5% (price as of 2026-08-20)
Jan. 11, 2019	CHRS	A	50,265	—	—	142,884 Direct	+54.27%	Acquired	(price as of 2026-08-20)
May 16, 2018	CHRS	S	20,984	$16.26	$341,200	1,316,582 Indirect	-1.57%	Disposed	-92.0% (price as of 2026-08-20)
Feb. 1, 2018	CHRS	A	400,000	—	—	400,000 Direct	—	Acquired	(price as of 2026-08-20)
Dec. 15, 2017	CHRS	A	20,984	—	—	92,619 Direct	+29.29%	Acquired	(price as of 2026-08-20)
Aug. 6, 2017	CHRS	A	200,000	—	—	200,000 Direct	—	Acquired	(price as of 2026-08-20)
Sept. 21, 2016	CHRS	S	50	$31.75	$1,588	1,337,566 Indirect	0.00%	Disposed	-95.9% (price as of 2026-08-20)
Sept. 20, 2016	CHRS	S	4,010	$31.75	$127,318	1,337,616 Indirect	-0.30%	Disposed	-95.9% (price as of 2026-08-20)
Sept. 16, 2016	CHRS	S	2,900	$31.79	$92,191	1,341,626 Indirect	-0.22%	Disposed	-95.9% (price as of 2026-08-20)
May 11, 2016	CHRS	A	323,889	—	—	323,889 Direct	—	Acquired	(price as of 2026-08-20)
Nov. 30, 2015	CHRS	S	400	$31.75	$12,700	1,344,526 Indirect	-0.03%	Disposed	-95.9% (price as of 2026-08-20)
May 21, 2015	CHRS	A	35,000	—	—	35,000 Direct	—	Acquired	(price as of 2026-08-20)
April 2, 2015	CHRS	A	150,000	—	—	150,000 Direct	—	Acquired	(price as of 2026-08-20)
April 2, 2015	CHRS	A	250,000	—	—	250,000 Direct	—	Acquired	(price as of 2026-08-20)
March 18, 2015	CHRS	J	13	—	—	86,965 Indirect	+0.01%	Acquired	(price as of 2026-08-20)
March 18, 2015	CHRS	J	2,084	—	—	71,635 Direct	+3.00%	Acquired	(price as of 2026-08-20)
March 18, 2015	CHRS	J	2,206	—	—	1,344,926 Indirect	+0.16%	Acquired	(price as of 2026-08-20)
March 10, 2015	CHRS	J	4	—	—	86,952 Indirect	0.00%	Acquired	(price as of 2026-08-20)
March 10, 2015	CHRS	J	828	—	—	69,551 Direct	+1.20%	Acquired	(price as of 2026-08-20)
March 10, 2015	CHRS	J	799	—	—	1,342,720 Indirect	+0.06%	Acquired	(price as of 2026-08-20)
Dec. 23, 2014	CHRS	G	20,000	—	—	1,341,921 Indirect	-1.47%	Disposed	(price as of 2026-08-20)
Nov. 12, 2014	CHRS	C	5,286	—	—	0 Indirect	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 12, 2014	CHRS	C	21,527	—	—	0 Indirect	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 12, 2014	CHRS	C	60,135	—	—	0 Indirect	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 12, 2014	CHRS	C	3,193	—	—	0 Indirect	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 12, 2014	CHRS	C	17,734	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 12, 2014	CHRS	X	3,225	$0.02	$64	17,734 Direct	+22.23%	Acquired	6425.0% (price as of 2026-08-20)
Nov. 12, 2014	CHRS	X	3,225	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 12, 2014	CHRS	X	19,976	$1.25	$24,970	60,135 Indirect	+49.74%	Acquired	4.4% (price as of 2026-08-20)
Nov. 12, 2014	CHRS	X	19,976	—	—	0 Indirect	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 12, 2014	CHRS	C	5,286	—	—	86,948 Indirect	+6.47%	Acquired	(price as of 2026-08-20)
Nov. 12, 2014	CHRS	C	21,527	—	—	81,662 Indirect	+35.80%	Acquired	(price as of 2026-08-20)
Nov. 12, 2014	CHRS	C	60,135	—	—	60,135 Indirect	—	Acquired	(price as of 2026-08-20)
Nov. 12, 2014	CHRS	C	3,193	—	—	1,361,921 Indirect	+0.23%	Acquired	(price as of 2026-08-20)
Nov. 12, 2014	CHRS	C	17,734	—	—	68,723 Direct	+34.78%	Acquired	(price as of 2026-08-20)
June 9, 2010	INSM	A	33,784	—	—	168,404 Direct	+25.10%	Acquired	(price as of 2026-08-20)
May 20, 2009	INSM	A	14,620	—	—	134,620 Direct	+12.18%	Acquired	(price as of 2026-08-20)
March 31, 2009	INSM	A	120,000	—	—	120,000 Direct	—	Acquired	(price as of 2026-08-20)
Oct. 29, 2008	INSM	A	100,000	—	—	100,000 Direct	—	Acquired	(price as of 2026-08-20)
May 7, 2008	INSM	A	17,500	—	—	17,500 Direct	—	Acquired	(price as of 2026-08-20)

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 29, 2026	CHRS	Stock Option (Right to Buy)	Common Stock (225,000)	—	May 29, 2036	225,000	Acquired
May 29, 2026	CHRS	Stock Option (Right to Buy)	Common Stock (402,500)	—	May 29, 2036	402,500	Acquired
May 29, 2026	CHRS	Stock Option (Right to Buy)	Common Stock (402,500)	—	May 29, 2036	402,500	Acquired
May 29, 2026	CHRS	Stock Option (Right to Buy)	Common Stock (125,000)	—	May 29, 2036	125,000	Acquired
May 29, 2026	CHRS	Stock Option (Right to Buy)	Common Stock (500,000)	—	May 29, 2036	500,000	Acquired
May 29, 2026	CHRS	Stock Option (Right to Buy)	Common Stock (500,000)	—	May 29, 2036	500,000	Acquired
May 29, 2026	CHRS	Stock Option (Right to Buy)	Common Stock (450,000)	—	May 29, 2036	450,000	Acquired
May 29, 2026	CHRS	Stock Option (Right to Buy)	Common Stock (400,000)	—	May 29, 2036	400,000	Acquired
May 29, 2026	CHRS	Stock Option (Right to Buy)	Common Stock (200,000)	—	May 29, 2036	200,000	Acquired
May 29, 2026	CHRS	Stock Option (Right to Buy)	Common Stock (225,000)	$5.44	June 13, 2033	225,000	Disposed
May 29, 2026	CHRS	Stock Option (Right to Buy)	Common Stock (402,500)	$10.37	Jan. 5, 2033	402,500	Disposed
May 29, 2026	CHRS	Stock Option (Right to Buy)	Common Stock (402,500)	$15.94	Jan. 4, 2032	402,500	Disposed
May 29, 2026	CHRS	Stock Option (Right to Buy)	Common Stock (125,000)	$17.60	Feb. 1, 2031	125,000	Disposed
May 29, 2026	CHRS	Stock Option (Right to Buy)	Common Stock (500,000)	$18.33	Jan. 23, 2031	500,000	Disposed
May 29, 2026	CHRS	Stock Option (Right to Buy)	Common Stock (500,000)	$17.73	Jan. 10, 2030	500,000	Disposed
May 29, 2026	CHRS	Stock Option (Right to Buy)	Common Stock (450,000)	$12.37	Jan. 11, 2029	450,000	Disposed
May 29, 2026	CHRS	Stock Option (Right to Buy)	Common Stock (400,000)	$10.05	Feb. 1, 2028	400,000	Disposed
May 29, 2026	CHRS	Stock Option (Right to Buy)	Common Stock (200,000)	$12.70	Aug. 6, 2027	200,000	Disposed
Jan. 11, 2019	CHRS	Stock Option (Right to Buy)	Common Stock (450,000)	$12.37	Jan. 11, 2029	450,000	Acquired
Feb. 1, 2018	CHRS	Stock Option (Right to Buy)	Common Stock (400,000)	$10.05	Feb. 1, 2028	400,000	Acquired
Aug. 6, 2017	CHRS	Stock Option (Right to Buy)	Common Stock (200,000)	$12.70	Aug. 6, 2027	200,000	Acquired
May 11, 2016	CHRS	Stock Option (Right to Buy)	Common Stock (323,889)	$17.17	May 11, 2026	323,889	Acquired
May 21, 2015	CHRS	Stock Option (Right to Buy)	Common Stock (35,000)	$25.26	May 21, 2025	35,000	Acquired
April 2, 2015	CHRS	Stock Option (Right to Buy)	Common Stock (150,000)	$29.00	April 1, 2025	150,000	Acquired
April 2, 2015	CHRS	Stock Option (Right to Buy)	Common Stock (250,000)	$29.00	April 1, 2025	250,000	Acquired
Nov. 12, 2014	CHRS	Series C Preferred Stock	Common Stock (5,286)	—	—	5,286	Disposed
Nov. 12, 2014	CHRS	Series B Preferred Stock	Common Stock (21,527)	—	—	21,527	Disposed
Nov. 12, 2014	CHRS	Series A Preferred Stock	Common Stock (60,135)	—	—	60,135	Disposed
Nov. 12, 2014	CHRS	Series B Preferred Stock	Common Stock (3,193)	—	—	3,193	Disposed
Nov. 12, 2014	CHRS	Series B Preferred Stock	Common Stock (17,734)	—	—	17,734	Disposed
Nov. 12, 2014	CHRS	Series B Preferred Stock	Common Stock (3,225)	—	—	3,225	Acquired
Nov. 12, 2014	CHRS	Warrant to Purchase Series B Preferred Stock	Series B Preferred Stock (3,225)	$0.02	—	3,225	Disposed
Nov. 12, 2014	CHRS	Series A Preferred Stock	Common Stock (19,976)	—	—	19,976	Acquired
Nov. 12, 2014	CHRS	Warrant to Purchase Series A Preferred Stock	Series A Preferred Stock (19,976)	$1.25	—	19,976	Disposed
Oct. 29, 2008	INSM	Stock Option - Right to Buy	Common Stock (100,000)	$1.08	Oct. 29, 2012	100,000	Acquired
May 7, 2008	INSM	Stock Option - Right to Buy	Common Stock (17,500)	$0.65	May 7, 2015	17,500	Acquired

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

Initial ownership (Form 3) 16 holdings

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

Date	Ticker	Security	Shares	Ownership
Nov. 6, 2014	CHRS	Common Stock, $0.0001 par value	50,989	Direct
Nov. 6, 2014	CHRS	Common Stock, $0.0001 par value	1,358,728	Indirect
Nov. 6, 2014	CHRS	Series B Preferred Stock→ Common Stock (14,509)	14,509	Direct
Nov. 6, 2014	CHRS	Series B Preferred Stock→ Common Stock (3,193)	3,193	Indirect
Nov. 6, 2014	CHRS	Series A Preferred Stock→ Common Stock (40,159)	40,159	Indirect
Nov. 6, 2014	CHRS	Series B Preferred Stock→ Common Stock (21,527)	21,527	Indirect
Nov. 6, 2014	CHRS	Series C Preferred Stock→ Common Stock (5,286)	5,286	Indirect
Nov. 6, 2014	CHRS	Warrant to Purchase Series A Preferred Stock→ Series A Preferred Stock (19,976)	19,976	Indirect
Nov. 6, 2014	CHRS	Warrant to Purchase Series B Preferred Stock→ Series B Preferred Stock (3,225)	3,225	Direct
Nov. 6, 2014	CHRS	Stock Option (Right to Buy)→ Common Stock (29,994)	29,994	Direct
Nov. 6, 2014	CHRS	Stock Option (Right to Buy)→ Common Stock (331,054)	331,054	Direct
Nov. 6, 2014	CHRS	Stock Option (Right to Buy)→ Common Stock (299,940)	299,940	Direct
Nov. 6, 2014	CHRS	Stock Option (Right to Buy)→ Common Stock (480,739)	480,739	Direct
Nov. 6, 2014	CHRS	Stock Option (Right to Buy)→ Common Stock (418,638)	418,638	Direct
Dec. 12, 2007	INSM	Stock Option - Right to buy→ Common Stock (25,000)	25,000	Direct
Dec. 12, 2007	INSM	Stock Option - Right to buy→ Common Stock (100,000)	100,000	Indirect

Compensation (DEF 14A)

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

CHRS

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2019	$750,737	$195,673	—	—	$863,927	—	$4,200	$5,361,707
2017	$656,030	—	—	—	$297,502	—	—	$2,661,292
2016	$652,609	—	—	—	$469,020	—	—	$4,766,773

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