Roger D. Kornberg

CIK: 0001444532

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)4 (100.0%)

Compensation grants

Other (G, F, J, C, D, …)0 (0.0%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (2)

COCP

Cocrystal Pharma, Inc.

Director

XBIO

Xenetic Biosciences, Inc.

Director

Discretionary Trading P&L

Holdings

Transaction History (4 total)

COCP
Cocrystal Pharma, Inc.
Jan 9, 2026
Award(A)
Stock Options (Right to Buy)
Direct
24.6K shares-
XBIO
Xenetic Biosciences, Inc.
Dec 31, 2025
Award(A)
Stock Options
Direct
2.5K shares-
XBIO
Xenetic Biosciences, Inc.
Dec 11, 2024
Award(A)
Stock Options
Direct
2.5K shares-
COCP
Cocrystal Pharma, Inc.
Oct 9, 2024
Award(A)
Direct
28.1K shares-

		Type	Shares	Price		Ownership
Jan 9, 2026	COCP Cocrystal Pharma, Inc.	Award(A) Stock Options (Right to Buy)	24,615	-	-	Direct
Dec 31, 2025	XBIO Xenetic Biosciences, Inc.	Award(A) Stock Options	2,500	-	-	Direct
Dec 11, 2024	XBIO Xenetic Biosciences, Inc.	Award(A) Stock Options	2,500	-	-	Direct
Oct 9, 2024	COCP Cocrystal Pharma, Inc.	Award(A)	28,109	-	$0	Direct

1-4 of 4 transactions

About Kornberg Roger D.

Kornberg Roger D. (SEC CIK 0001444532) files insider reports with the SEC as Director of Cocrystal Pharma, Inc. (COCP) and Director of Xenetic Biosciences, Inc. (XBIO).

Signal8 holds 4 ownership filings by Kornberg Roger D., all Form 4s, filed between Oct 11, 2024 and Jan 13, 2026. Those filings report 4 transactions, from Oct 9, 2024 to Jan 9, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Kornberg Roger D.'s filings is in FRAMINGHAM, MA.

Recent filings by Kornberg Roger D.

Jan 9, 2026: Grant or award of COCP derivative securities (Form 4, code A).
Dec 31, 2025: Grant or award of XBIO derivative securities (Form 4, code A).
Dec 11, 2024: Grant or award of XBIO derivative securities (Form 4, code A).
Oct 9, 2024: Grant or award of COCP shares (Form 4, code A).

Other insiders filing for Cocrystal Pharma, Inc. (COCP)

Brosgart Carol L, Director
FROST PHILLIP MD ET AL, Director
SAPIRSTEIN JAMES, Chief Executive Officer
PFENNIGER RICHARD C JR, Director
Lee Sam, President and Co-CEO
Hassan Fred, Director

How to read Form 4 transaction codes