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Who

Barbara Klencke

Director

Company insider

Files Form 4 as: Director, Xencor; Director, TScan Therapeutics; Chief Medical Officer, ALX Oncology Holdings; Director, eFFECTOR Therapeutics; Chief Medical Officer, Sierra Oncology.

In numbers

Trades disclosed
58
Buys
7
Sells
0
Bought
$322K
Sold
$0
Companies
5
Companies where not an officer
3
First trade
8 Mar 2016
Last trade
16 Jun 2026
Last filed
8 Jul 2026

Companies traded

Where they are an officer
ALXO ALX Oncology HoldingsDirector, Officer · Biotechnology · last 16 Apr 20260 buys · 0 sells
Sierra OncologyOfficer · last 1 Jul 20223 buys · 0 sells
Everywhere else they filed: board seats, 10% stakes, other companies
XNCR XencorDirector · Biotechnology · last 16 Jun 20260 buys · 0 sells
TCRX TScan TherapeuticsDirector · Biotechnology · last 20 May 20264 buys · 0 sells
eFFECTOR TherapeuticsDirector · last 13 Jun 20240 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
16 Jun 2026filed 8 Jul 2026XNCR XencorBiotechnologySEC FORM 4 Code A—10,302 at $0.00filing
16 Jun 2026filed 8 Jul 2026XNCR Xencoroption or derivative · BiotechnologySEC FORM 4 Code A—20,604 at $0.00filing
16 Jun 2026filed 8 Jul 2026XNCR Xencoroption or derivative · BiotechnologySEC FORM 4 Code A—20,604 at $0.00filing
16 Jun 2026filed 8 Jul 2026XNCR XencorBiotechnologySEC FORM 4 Code A—10,302 at $0.00filing
20 May 2026filed 22 May 2026TCRX TScan Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—67,000 at $0.00filing
20 May 2026filed 22 May 2026TCRX TScan Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—67,000 at $0.00filing
16 Apr 2026filed 17 Apr 2026ALXO ALX Oncology Holdingsoption or derivative · BiotechnologySEC FORM 4 Code A—100,000 at $0.00filing
16 Apr 2026filed 17 Apr 2026ALXO ALX Oncology Holdingsoption or derivative · BiotechnologySEC FORM 4 Code A—100,000 at $0.00filing
3 Mar 2026filed 5 Mar 2026ALXO ALX Oncology Holdingsoption or derivative · BiotechnologySEC FORM 4 Code A—700,000 at $0.00filing
3 Mar 2026filed 5 Mar 2026ALXO ALX Oncology Holdingsoption or derivative · BiotechnologySEC FORM 4 Code A—700,000 at $0.00filing
17 Sep 2025filed 19 Sep 2025ALXO ALX Oncology Holdingsoption or derivative · BiotechnologySEC FORM 4 Code A—300,000 at $0.00filing
30 Jun 2025filed 2 Jul 2025TCRX TScan Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—67,000 at $0.00filing
12 Jun 2025filed 16 Jun 2025XNCR Xencoroption or derivative · BiotechnologySEC FORM 4 Code A—27,372 at $0.00filing
12 Jun 2025filed 16 Jun 2025XNCR XencorBiotechnologySEC FORM 4 Code A—13,686 at $0.00filing
21 Jan 2025filed 23 Jan 2025ALXO ALX Oncology Holdingsoption or derivative · BiotechnologySEC FORM 4 Code A—40,400 at $0.00filing
23 Sep 2024filed 24 Sep 2024TCRX TScan TherapeuticsBiotechnologySEC FORM 4 Bought$26K5,000 at $5.29filing
26 Aug 2024filed 27 Aug 2024TCRX TScan TherapeuticsBiotechnologySEC FORM 4 Bought$28K5,000 at $5.53filing
23 Aug 2024filed 27 Aug 2024TCRX TScan TherapeuticsBiotechnologySEC FORM 4 Bought$28K5,000 at $5.69filing
13 Jun 2024filed 17 Jun 2024XNCR Xencoroption or derivative · BiotechnologySEC FORM 4 Code A—11,971 at $0.00filing
13 Jun 2024filed 17 Jun 2024XNCR XencorBiotechnologySEC FORM 4 Code A—5,986 at $0.00filing

Sectors

Health Care4
Not placed3

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

Related people

Shelly WongSVP, Finance and CAO · SVP, Finance and CAO at Alx Oncology Holdings, filing Form 4 there in the last year
Jason LettmannChief Executive Officer · Chief Executive Officer at Alx Oncology Holdings, filing Form 4 there in the last year
Jeff E. KnightChief Dev & Operating Officer · Chief Dev & Operating Officer at Alx Oncology Holdings, filing Form 4 there in the last year
Corey S. GoodmanDirector and 10% owner · Director and 10% owner at Alx Oncology Holdings, filing Form 4 there in the last year
Harish ShantharamChief Financial Officer · Chief Financial Officer at Alx Oncology Holdings, filing Form 4 there in the last year