CenterBook Partners LP

Position in ONT — Onterris, Inc.

CIK 1872738 GREENWICH, CT

Position in ONT

as of Mar 31, 2026 · filed May 5, 2026 Compact

Position Value

$3,075,720

+$324,060 QoQ

Shares Held

140,508

+26.8% QoQ

Ownership

0.389%

of shares outstanding

% of Portfolio

0.17%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Sep 2025

3 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Industrials · as of Mar 31, 2026

CenterBook Partners LP holds $4,559,675 across 3 Waste Management names. ONT ranks #1 (67.5% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ONT	Onterris, Inc. This page	140,508	$3,075,720
2	GFL	GFL Environmental Inc.	24,199	$1,009,582
3	CWST	Casella Waste Systems Inc	5,979	$474,373

3 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$3,075,720	140,508	+26.8%	Shares	Sole	2026-05-05
2025-12-31	$2,751,660	110,820	+17.6%	Shares	Sole	2026-02-11
2025-09-30	$2,586,979	94,209	—	Shares	Sole	2025-11-07
No filing history on record for this holder in this stock.