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Who

Marella Thorell

Officer

Company insider

Files Form 4 as: Officer, Seres Therapeutics; Director, ESSA Pharma; Director, Carisma Therapeutics; Chief Financial Officer, Evelo Biosciences; Director, GRI Bio; Chief Accounting Officer, Centessa Pharmaceuticals.

In numbers

Trades disclosed
38
Buys
1
Sells
4
Bought
$20K
Sold
$26K
Companies
6
Companies where not an officer
3
First trade
11 Dec 2020
Last trade
8 Jul 2026
Last filed
10 Jul 2026

Companies traded

Where they are an officer
MCRB Seres TherapeuticsOfficer · Biotechnology · last 8 Jul 20260 buys · 0 sells
Evelo BiosciencesOfficer · last 8 Nov 20230 buys · 4 sells
Centessa PharmaceuticalsOfficer · last 21 Mar 20221 buy · 0 sells
Everywhere else they filed: board seats, 10% stakes, other companies
ESSA PharmaDirector · last 9 Oct 20250 buys · 0 sells
Carisma TherapeuticsDirector · last 1 Jul 20240 buys · 0 sells
GRI GRI BioDirector · Biotechnology · last 13 Dec 20220 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
8 Jul 2026filed 10 Jul 2026MCRB Seres Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—7,500 at $0.00filing
8 Jul 2026filed 10 Jul 2026MCRB Seres Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—7,500 at $0.00filing
4 Mar 2026filed 6 Mar 2026MCRB Seres Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—22,500 at $0.00filing
4 Mar 2026filed 6 Mar 2026MCRB Seres Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—22,500 at $0.00filing
9 Oct 2025filed 15 Oct 2025ESSA PharmaSEC FORM 4 Code D—2,881filing
7 Feb 2025filed 11 Feb 2025MCRB Seres Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—650,000 at $0.00filing
1 Jul 2024filed 1 Jul 2024Carisma Therapeuticsoption or derivativeSEC FORM 4 Code A—38,700 at $0.00filing
25 Mar 2024filed 28 Mar 2024ESSA Pharmaoption or derivativeSEC FORM 4 Code A—50,000 at $0.00filing
25 Mar 2024filed 27 Mar 2024MCRB Seres Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—700,000 at $0.00filing
8 Nov 2023filed 8 Nov 2023Evelo BiosciencesSEC FORM 4 Sold$5981,811 at $0.33filing
7 Nov 2023filed 8 Nov 2023Evelo Biosciencesoption or derivativeSEC FORM 4 Code M—6,500 at $0.00filing
7 Nov 2023filed 8 Nov 2023Evelo BiosciencesSEC FORM 4 Code M—6,500filing
2 Nov 2023filed 3 Nov 2023Evelo BiosciencesSEC FORM 4 Sold$1,3203,999 at $0.33filing
1 Nov 2023filed 3 Nov 2023Evelo Biosciencesoption or derivativeSEC FORM 4 Code M—12,500 at $0.00filing
1 Nov 2023filed 3 Nov 2023Evelo BiosciencesSEC FORM 4 Code M—12,500filing
11 Sep 2023filed 13 Sep 2023Evelo Biosciencesoption or derivativeSEC FORM 4 Code A—37,500 at $0.00filing
8 Aug 2023filed 9 Aug 2023Evelo BiosciencesSEC FORM 4 Sold$19K2,004 at $9.51filing
7 Aug 2023filed 9 Aug 2023Evelo Biosciencesoption or derivativeSEC FORM 4 Code M—6,500 at $0.00filing
7 Aug 2023filed 9 Aug 2023Evelo BiosciencesSEC FORM 4 Code M—6,500filing
8 May 2023filed 10 May 2023Evelo BiosciencesSEC FORM 4 Sold$5,00938,531 at $0.13filing

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

Matthew R. HennOfficer · Officer at Seres Therapeutics, filing Form 4 there in the last year
Eric D. ShaffDirector · Director at Seres Therapeutics, filing Form 4 there in the last year
Kelly BradyOfficer · Officer at Seres Therapeutics, filing Form 4 there in the last year
Thomas DesRosierOfficer · Officer at Seres Therapeutics, filing Form 4 there in the last year
Kurt GravesDirector · Director at Seres Therapeutics, filing Form 4 there in the last year