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Who

Dannielle Appelhans

Director

Company insider

Files Form 4 as: Director, Halozyme Therapeutics; Director, Generation Bio Co; CEO and President, Rubius Therapeutics.

Every Form 4 they filed

In numbers

Trades disclosed
34
Buys
2
Sells
3
Bought
$32K
Sold
$6,909
Companies
3
Companies where not an officer
2
First trade
31 Aug 2021
Last trade
1 Sep 2026
Last filed
2 Sep 2026

Companies traded

Where they are an officer
Rubius TherapeuticsOfficer · last 24 Feb 20230 buys · 3 sells
Everywhere else they filed: board seats, 10% stakes, other companies
HALO Halozyme TherapeuticsDirector · Biotechnology · last 1 Sep 20260 buys · 0 sells
Generation Bio CoDirector · Biotechnology · last 9 Feb 20262 buys · 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
1 Sep 2026filed 2 Sep 2026HALO Halozyme TherapeuticsBiotechnologySEC FORM 4 Code A—1,161 at $0.00filing
1 Sep 2026filed 2 Sep 2026HALO Halozyme Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—1,778 at $0.00filing
1 Sep 2026filed 2 Sep 2026HALO Halozyme Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—1,778 at $0.00filing
1 Sep 2026filed 2 Sep 2026HALO Halozyme TherapeuticsBiotechnologySEC FORM 4 Code A—1,161 at $0.00filing
9 Feb 2026filed 9 Feb 2026Generation Bio CoBiotechnologySEC FORM 4 Code U—1,263filing
9 Feb 2026filed 9 Feb 2026Generation Bio CoBiotechnologySEC FORM 4 Code U—736filing
9 Feb 2026filed 9 Feb 2026Generation Bio Cooption or derivative · BiotechnologySEC FORM 4 Code D—3,000filing
9 Feb 2026filed 9 Feb 2026Generation Bio Cooption or derivativeSEC FORM 4 Code D—3,000filing
9 Feb 2026filed 9 Feb 2026Generation Bio Cooption or derivativeSEC FORM 4 Code D—3,840filing
9 Feb 2026filed 9 Feb 2026Generation Bio Cooption or derivativeSEC FORM 4 Code D—2,500filing
9 Feb 2026filed 9 Feb 2026Generation Bio Cooption or derivativeSEC FORM 4 Code D—6,000filing
9 Feb 2026filed 9 Feb 2026Generation Bio Cooption or derivative · BiotechnologySEC FORM 4 Code D—3,840filing
9 Feb 2026filed 9 Feb 2026Generation Bio Cooption or derivative · BiotechnologySEC FORM 4 Code D—2,500filing
9 Feb 2026filed 9 Feb 2026Generation Bio Cooption or derivative · BiotechnologySEC FORM 4 Code D—6,000filing
9 Feb 2026filed 9 Feb 2026Generation Bio CoSEC FORM 4 Code U—1,263filing
9 Feb 2026filed 9 Feb 2026Generation Bio CoSEC FORM 4 Code U—736filing
4 Jun 2025filed 6 Jun 2025Generation Bio Cooption or derivativeSEC FORM 4 Code A—30,000 at $0.00filing
6 Jun 2024filed 10 Jun 2024Generation Bio Cooption or derivativeSEC FORM 4 Code A—60,000 at $0.00filing
8 Dec 2023filed 11 Dec 2023Generation Bio CoSEC FORM 4 Bought$1,159637 at $1.82filing
8 Dec 2023filed 11 Dec 2023Generation Bio CoSEC FORM 4 Bought$13K7,363 at $1.79filing

News

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

Sectors

Not placed5

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

Related people

Nobody else traded the same names lately.