ArrowMark Colorado Holdings LLC

Position in ONT — Onterris, Inc.

CIK 1483859 Denver, CO

Position in ONT

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$3,063,023

-$3,626,501 QoQ

Shares Held

139,928

-48.1% QoQ

Ownership

0.387%

of shares outstanding

% of Portfolio

0.08%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Sep 2020

15 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Industrials · as of Mar 31, 2026

ArrowMark Colorado Holdings LLC holds $3,815,192 across 2 Waste Management names. ONT ranks #1 (80.3% of the industry book) .

#	Ticker	Company	Shares	Value (USD)	Open
1	ONT	Onterris, Inc. This page	139,928	$3,063,023
2	GFL	GFL Environmental Inc.	18,029	$752,169

15 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$3,063,023	139,928	-48.1%	Shares	Sole	2026-05-15
2025-12-31	$6,689,524	269,413	-2.9%	Shares	Sole	2026-02-17
2025-09-30	$7,618,227	277,430	+0.3%	Shares	Sole	2025-11-14
2025-06-30	$6,055,737	276,644	-14.1%	Shares	Sole	2025-08-14
2025-03-31	$4,593,146	322,100	-5.6%	Shares	Sole	2025-05-15
2024-12-31	$6,331,764	341,335	+29.7%	Shares	Sole	2025-02-14
2024-09-30	$6,923,527	263,252	+22.2%	Shares	Sole	2024-11-14
2024-06-30	$9,599,159	215,421	-17.1%	Shares	Sole	2024-08-14
2024-03-31	$10,172,840	259,710	-30.1%	Shares	Sole	2024-05-15
2023-12-31	$11,939,508	371,600	+32.8%	Shares	Sole	2024-02-14
2023-09-30	$8,185,719	279,758	+7.3%	Shares	Sole	2023-11-14
2021-06-30	$13,989,215	260,701	-14.1%	Shares	Sole	2021-08-16
2021-03-31	$15,241,046	303,667	-37.8%	Shares	Sole	2021-05-17
2020-12-31	$15,107,334	487,963	-28.1%	Shares	Sole	2021-02-16
2020-09-30	$16,158,487	678,358	—	Shares	Sole	2020-11-16
No filing history on record for this holder in this stock.