Aoife Brennan

CIK: 0001714563

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)1 (16.7%)

Position reduction

Option Exercises (M)1 (16.7%)

Derivative conversions

Awards (A)4 (66.7%)

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)

XLO

Xilio Therapeutics, Inc.

Director

CLYM

Climb Bio, Inc.

DirectorOfficer

Discretionary Trading P&L

Holdings

Transaction History (6 total)

XLO
Xilio Therapeutics, Inc.
Jun 11, 2026
Award(A)
Stock Option (right to buy)
Direct
5K shares-
CLYM
Climb Bio, Inc.
Jan 6, 2026
Award(A)
Stock Option (Right to Buy)
Direct
700K shares-
CLYM
Climb Bio, Inc.
Jun 30, 2025
Sale(S)
Direct
20.6K shares at avg. $1.22$25K
CLYM
Climb Bio, Inc.
Jun 27, 2025
Exercise(M)
Direct
68.8K shares-
XLO
Xilio Therapeutics, Inc.
Jun 11, 2025
Award(A)
Stock Option (right to buy)
Direct
31K shares-
CLYM
Climb Bio, Inc.
Jan 13, 2025
Award(A)
Stock Option (Right to Buy)
Direct
1.2M shares-

		Type	Shares	Price		Ownership
Jun 11, 2026	XLO Xilio Therapeutics, Inc.	Award(A) Stock Option (right to buy)	5,000	-	-	Direct
Jan 6, 2026	CLYM Climb Bio, Inc.	Award(A) Stock Option (Right to Buy)	700,000	-	-	Direct
Jun 30, 2025	CLYM Climb Bio, Inc.	Sale(S)	20,618	$1.22	$25,154	Direct
Jun 27, 2025	CLYM Climb Bio, Inc.	Exercise(M)	68,750	-	-	Direct
Jun 11, 2025	XLO Xilio Therapeutics, Inc.	Award(A) Stock Option (right to buy)	31,000	-	-	Direct
Jan 13, 2025	CLYM Climb Bio, Inc.	Award(A) Stock Option (Right to Buy)	1,150,000	-	-	Direct

1-6 of 6 transactions

About Brennan Aoife

Brennan Aoife (SEC CIK 0001714563) files insider reports with the SEC as Director of Xilio Therapeutics, Inc. (XLO) and President and CEO of Climb Bio, Inc. (CLYM).

Signal8 holds 5 ownership filings by Brennan Aoife, all Form 4s, filed between Jan 15, 2025 and Jun 12, 2026. Those filings report 6 transactions, from Jan 13, 2025 to Jun 11, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Brennan Aoife's filings is in WALTHAM, MA.

Recent filings by Brennan Aoife

Jun 11, 2026: Grant or award of XLO derivative securities (Form 4, code A).
Jan 6, 2026: Grant or award of CLYM derivative securities (Form 4, code A).
Jun 30, 2025: Open-market sale of CLYM shares (Form 4, code S).
Jun 27, 2025: Option exercise of CLYM shares (Form 4, code M).
Jun 11, 2025: Grant or award of XLO derivative securities (Form 4, code A).

Other insiders filing for Xilio Therapeutics, Inc. (XLO)

Houvras Yariv, CHIEF MEDICAL OFFICER
Bello Akintunde Olatokumbo, Director
Shannon James Samuel, Director
Curran Daniel J., Director
Xu Yuan, Director
ROSS ROBERT W., Director

How to read Form 4 transaction codes