Joel S. Marcus

CIK: 0001216955

Transaction Breakdown

Open Market Buys (P)10 (45.5%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)1 (4.5%)

Derivative conversions

Awards (A)5 (22.7%)

Compensation grants

Other (G, F, J, C, D, …)6 (27.3%)

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

Companies & Roles (3)

TRXB

TRex Bio, Inc.

Director

ARE

ALEXANDRIA REAL ESTATE EQUITIES, INC.

DirectorOfficer

ITCI

Intra-Cellular Therapies, Inc.

Director

Discretionary Trading P&L

Holdings

Transaction History (22 total)

TRXB
TRex Bio, Inc.
Oct 13, 2026
Conversion(C)
Direct
41.9K shares-
TRXB
TRex Bio, Inc.
Oct 8, 2026
Award(A)
Stock Option (Right to Buy)
Direct
17.5K shares-
ARE
ALEXANDRIA REAL ESTATE EQUITIES, INC.
Sep 11, 2026
Purchase(P)
Direct
5K shares at avg. $49.68$248K
ARE
ALEXANDRIA REAL ESTATE EQUITIES, INC.
Aug 17, 2026
Purchase(P)
Direct
5K shares at avg. $46.28$231K
ARE
ALEXANDRIA REAL ESTATE EQUITIES, INC.
May 6, 2026
Purchase(P)
Direct
4K shares at avg. $45.99$183K
ARE
ALEXANDRIA REAL ESTATE EQUITIES, INC.
May 6, 2026
Purchase(P)
Direct
3.5K shares at avg. $46.74$164K
ARE
ALEXANDRIA REAL ESTATE EQUITIES, INC.
May 5, 2026
Purchase(P)
Direct
3.8K shares at avg. $42.76$164K
ARE
ALEXANDRIA REAL ESTATE EQUITIES, INC.
May 5, 2026
Purchase(P)
Direct
2.1K shares at avg. $41.89$86K
ARE
ALEXANDRIA REAL ESTATE EQUITIES, INC.
May 5, 2026
Purchase(P)
Direct
1.6K shares at avg. $43.70$70K
ARE
ALEXANDRIA REAL ESTATE EQUITIES, INC.
May 4, 2026
Purchase(P)
Direct
10K shares at avg. $41.02$410K
ARE
ALEXANDRIA REAL ESTATE EQUITIES, INC.
Feb 12, 2026
Purchase(P)
Direct
7.7K shares at avg. $54.31$418K
ARE
ALEXANDRIA REAL ESTATE EQUITIES, INC.
Feb 12, 2026
Purchase(P)
Direct
17.3K shares at avg. $53.74$930K
ARE
ALEXANDRIA REAL ESTATE EQUITIES, INC.
Jan 23, 2026
Disposition(D)
Direct
35.1K shares-
ARE
ALEXANDRIA REAL ESTATE EQUITIES, INC.
Jan 22, 2026
Disposition(D)
Direct
14.7K shares-
ARE
ALEXANDRIA REAL ESTATE EQUITIES, INC.
Jan 9, 2026
Award(A)
Direct
100.1K shares-
ARE
ALEXANDRIA REAL ESTATE EQUITIES, INC.
Jan 2, 2026
Award(A)
Direct
31.3K shares-
ITCI
Intra-Cellular Therapies, Inc.
Apr 2, 2025
Disposition(D)
Direct
48.2K shares at avg. $132.00$6.4M
ITCI
Intra-Cellular Therapies, Inc.
Apr 2, 2025
Disposition(D)
Indirect
10K shares at avg. $132.00$1.3M
ITCI
Intra-Cellular Therapies, Inc.
Feb 24, 2025
Exercise(M)
Direct
7K shares at avg. $63.79$447K
ARE
ALEXANDRIA REAL ESTATE EQUITIES, INC.
Jan 10, 2025
Award(A)
Direct
46.2K shares-
ARE
ALEXANDRIA REAL ESTATE EQUITIES, INC.
Jan 2, 2025
Award(A)
Direct
15.6K shares-
ARE
ALEXANDRIA REAL ESTATE EQUITIES, INC.
Dec 31, 2024
Disposition(D)
Direct
19.2K shares-

		Type	Shares	Price		Ownership
Oct 13, 2026	TRXB TRex Bio, Inc.	Conversion(C)	41,871	-	$0	Direct
Oct 8, 2026	TRXB TRex Bio, Inc.	Award(A) Stock Option (Right to Buy)	17,500	-	-	Direct
Sep 11, 2026	ARE ALEXANDRIA REAL ESTATE EQUITIES, INC.	Purchase(P)	5,000	$49.68	$248,400	Direct
Aug 17, 2026	ARE ALEXANDRIA REAL ESTATE EQUITIES, INC.	Purchase(P)	5,000	$46.28	$231,400	Direct
May 6, 2026	ARE ALEXANDRIA REAL ESTATE EQUITIES, INC.	Purchase(P)	3,989	$45.99	$183,454	Direct
May 6, 2026	ARE ALEXANDRIA REAL ESTATE EQUITIES, INC.	Purchase(P)	3,511	$46.74	$164,104	Direct
May 5, 2026	ARE ALEXANDRIA REAL ESTATE EQUITIES, INC.	Purchase(P)	3,832	$42.76	$163,856	Direct
May 5, 2026	ARE ALEXANDRIA REAL ESTATE EQUITIES, INC.	Purchase(P)	2,062	$41.89	$86,377	Direct
May 5, 2026	ARE ALEXANDRIA REAL ESTATE EQUITIES, INC.	Purchase(P)	1,606	$43.70	$70,182	Direct
May 4, 2026	ARE ALEXANDRIA REAL ESTATE EQUITIES, INC.	Purchase(P)	10,000	$41.02	$410,200	Direct
Feb 12, 2026	ARE ALEXANDRIA REAL ESTATE EQUITIES, INC.	Purchase(P)	7,700	$54.31	$418,187	Direct
Feb 12, 2026	ARE ALEXANDRIA REAL ESTATE EQUITIES, INC.	Purchase(P)	17,300	$53.74	$929,702	Direct
Jan 23, 2026	ARE ALEXANDRIA REAL ESTATE EQUITIES, INC.	Disposition(D)	35,075	-	$0	Direct
Jan 22, 2026	ARE ALEXANDRIA REAL ESTATE EQUITIES, INC.	Disposition(D)	14,671	-	$0	Direct
Jan 9, 2026	ARE ALEXANDRIA REAL ESTATE EQUITIES, INC.	Award(A)	100,056	-	$0	Direct
Jan 2, 2026	ARE ALEXANDRIA REAL ESTATE EQUITIES, INC.	Award(A)	31,270	-	$0	Direct
Apr 2, 2025	ITCI Intra-Cellular Therapies, Inc.	Disposition(D)	48,238	$132.00	$6,367,416	Direct
Apr 2, 2025	ITCI Intra-Cellular Therapies, Inc.	Disposition(D)	10,000	$132.00	$1,320,000	Indirect
Feb 24, 2025	ITCI Intra-Cellular Therapies, Inc.	Exercise(M)	7,009	$63.79	$447,104	Direct
Jan 10, 2025	ARE ALEXANDRIA REAL ESTATE EQUITIES, INC.	Award(A)	46,207	-	$0	Direct
Jan 2, 2025	ARE ALEXANDRIA REAL ESTATE EQUITIES, INC.	Award(A)	15,610	-	$0	Direct
Dec 31, 2024	ARE ALEXANDRIA REAL ESTATE EQUITIES, INC.	Disposition(D)	19,156	-	$0	Direct

1-22 of 22 transactions

About MARCUS JOEL S

MARCUS JOEL S (SEC CIK 0001216955) files insider reports with the SEC as Director of TRex Bio, Inc. (TRXB), Executive Chairman of ALEXANDRIA REAL ESTATE EQUITIES, INC. (ARE) and Director of Intra-Cellular Therapies, Inc. (ITCI).

Signal8 holds 16 ownership filings by MARCUS JOEL S (1 Form 3, 15 Form 4), filed between Jan 3, 2025 and Oct 13, 2026. Those filings report 22 transactions, from Dec 31, 2024 to Oct 13, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on MARCUS JOEL S's filings is in SOUTH SAN FRANCISCO, CA.

Recent filings by MARCUS JOEL S

Oct 13, 2026: Conversion of TRXB shares (Form 4, code C).
Oct 8, 2026: Grant or award of TRXB derivative securities (Form 4, code A).
Sep 11, 2026: Open-market purchase of ARE shares (Form 4, code P).
Aug 17, 2026: Open-market purchase of ARE shares (Form 4, code P).
May 6, 2026: Open-market purchases of ARE shares (2 lines, Form 4, code P).

Other insiders filing for TRex Bio, Inc. (TRXB)

Alexandria Venture Investments, LLC, 10% Owner
SVLSF VI, LLC, 10% Owner
Coy Travis Alan, Director
Ross Michael Jay, Director
Hirth Peter, Director
Gallagher Carol Giltner, Director

How to read Form 4 transaction codes