Dennis M Lanfear

CIK 1420822 · President & CEO · last filed 2026-06-02

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

Loading insider history…
Disclosed Exposure

$18.07M

Companies

2

Total Filings

45

Lifetime Open-Market Net

-$17.16M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
CHRS President & CEO 1,135,200 $1.40 $1.59M -$17.16M 40 2026-06-02
INSM Director 168,404 $97.85 $16.48M $0 5 2010-06-11

Recent Filings · Page 2 of 5

45 filings
Form 4 transactions across all companies, newest first.
Filed Symbol Action Net Shares Net $ Link
2023-11-24 CHRS Mixed +76,840 -$24.8K EDGAR
2023-06-15 CHRS Grant (A) $0 EDGAR
2023-01-24 CHRS Grant (A) +86,250 $0 EDGAR
2023-01-06 CHRS Mixed −10,905 -$107.6K EDGAR
2023-01-04 CHRS Gift (G) −4,000 $0 EDGAR
2022-01-06 CHRS Grant (A) +86,250 $0 EDGAR
2021-11-23 CHRS Gift (G) −10,000 $0 EDGAR
2021-06-08 CHRS Mixed +300,000 -$283.2K EDGAR
2021-02-03 CHRS Grant (A) $0 EDGAR
2021-01-26 CHRS Grant (A) $0 EDGAR
Showing 1120 of 45
Page 2 of 5
Codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.