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Who

James A. Johnson

Director

Company insider

Files Form 4 as: Director, LeonaBio; Chief Financial Officer, NanoString Technologies; Executive VP and CFO, Zymogenetics.

Every Form 4 they filed

In numbers

Trades disclosed
70
Buys
1
Sells
10
Bought
$12K
Sold
$1.0M
Companies
3
Companies where not an officer
1
First trade
5 Jan 2006
Last trade
23 Jun 2026
Last filed
24 Jun 2026

Companies traded

Where they are an officer
NanoString TechnologiesOfficer · last 1 Sep 20170 buys · 2 sells
ZymogeneticsOfficer · last 8 Oct 20100 buys · 8 sells
Everywhere else they filed: board seats, 10% stakes, other companies
LONA LeonaBioDirector · Biotechnology · last 23 Jun 20261 buy · 0 sells

Activity over time

1 Nov 2024 – 1 Oct 2026
101Nov 24May 25Nov 25Apr 26Oct 26

Buys above the line, sells below, each month.

Every trade

TradedCompanyWhatAmount
23 Jun 2026filed 24 Jun 2026LONA LeonaBiooption or derivative · BiotechnologySEC FORM 4 Code A—28,000 at $0.00filing
23 Jun 2026filed 24 Jun 2026LONA LeonaBiooption or derivative · BiotechnologySEC FORM 4 Code A—28,000 at $0.00filing
9 Apr 2026filed 13 Apr 2026LONA LeonaBiooption or derivative · BiotechnologySEC FORM 4 Code A—28,000 at $0.00filing
9 Apr 2026filed 13 Apr 2026LONA LeonaBiooption or derivative · BiotechnologySEC FORM 4 Code A—28,000 at $0.00filing
30 May 2025filed 3 Jun 2025LONA LeonaBiooption or derivative · BiotechnologySEC FORM 4 Code A—20,900 at $0.00filing
24 May 2024filed 24 May 2024LONA LeonaBiooption or derivative · BiotechnologySEC FORM 4 Code A—20,900 at $0.00filing
19 May 2023filed 22 May 2023LONA LeonaBiooption or derivative · BiotechnologySEC FORM 4 Code A—20,900 at $0.00filing
29 Mar 2023filed 30 Mar 2023LONA LeonaBioBiotechnologySEC FORM 4 Bought$12K5,000 at $2.40filing
20 May 2022filed 27 May 2022LONA LeonaBiooption or derivative · BiotechnologySEC FORM 4 Code A—13,871 at $0.00filing
28 May 2021filed 1 Jun 2021LONA LeonaBiooption or derivative · BiotechnologySEC FORM 4 Code A—13,871 at $0.00filing
1 Sep 2017filed 5 Sep 2017NanoString TechnologiesSEC FORM 4 Code A$7,841594 at $13.20filing
1 Mar 2017filed 3 Mar 2017NanoString TechnologiesSEC FORM 4 Code A$7,551621 at $12.16filing
6 Feb 2017filed 8 Feb 2017NanoString TechnologiesSEC FORM 4 Code M—3,333filing
6 Feb 2017filed 8 Feb 2017NanoString TechnologiesSEC FORM 4 Code F$20K1,089 at $18.80filing
6 Feb 2017filed 8 Feb 2017NanoString Technologiesoption or derivativeSEC FORM 4 Code M—3,333 at $0.00filing
6 Feb 2017filed 8 Feb 2017NanoString Technologiesoption or derivativeSEC FORM 4 Code A—10,000 at $0.00filing
6 Feb 2017filed 8 Feb 2017NanoString Technologiesoption or derivativeSEC FORM 4 Code A—20,000 at $0.00filing
11 Nov 2016filed 14 Nov 2016NanoString TechnologiesSEC FORM 4 Code M$22K4,391 at $5.12filing
11 Nov 2016filed 14 Nov 2016NanoString TechnologiesSEC FORM 4 Sold$99K4,391 at $22.60filing
11 Nov 2016filed 14 Nov 2016NanoString Technologiesoption or derivativeSEC FORM 4 Code M—4,391 at $0.00filing

News

No headline names them, or the companies they trade most, lately.

Sectors

Health Care1
Not placed10

Buys in green, sells in red, by the company’s sector.

Related people

Nobody else traded the same names lately.