Onterris, Inc.
DE ˙ MUN ˙ US6151111019
14,80 € ↑0,40 (2,78%)
2026-06-05
DEL PRIS
SecurityDE:5MO / Onterris, Inc.
InstitutionArrowMark Colorado Holdings LLC
Latest Disclosed Ownership139,928 shares
Latest Disclosed Value $ 3,063,024
ArrowMark Colorado Holdings LLC reports 48.06% decrease in ownership of 5MO / Onterris, Inc.

On May 15, 2026 - ArrowMark Colorado Holdings LLC filed a 13F-HR form disclosing ownership of 139,928 shares of Onterris, Inc. (DE:5MO) valued at $2,630,646 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 269,413 shares of Onterris, Inc.. This represents a change in shares of -48.06% during the quarter. The current value of the position is $2,070,934 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F MONTROSE ENVIRONMENTAL GROUP COM 615111101 139,928 -129,485 -48.06 3,063 -54.21 0.0814
2026-02-17 2025-12-31 13F MONTROSE ENVIRONMENTAL GROUP COM 615111101 269,413 -8,017 -2.89 6,690 -12.19 0.1472
2025-11-14 2025-09-30 13F MONTROSE ENVIRONMENTAL GROUP COM 615111101 277,430 786 0.28 7,618 25.81 0.1415
2025-08-14 2025-06-30 13F MONTROSE ENVIRONMENTAL GROUP COM 615111101 276,644 -45,456 -14.11 6,056 31.83 0.1091
2025-05-15 2025-03-31 13F MONTROSE ENVIRONMENTAL GROUP COM 615111101 322,100 -19,235 -5.64 4,593 -27.45 0.0744
2025-02-14 2024-12-31 13F MONTROSE ENVIRONMENTAL GROUP COM 615111101 341,335 78,083 29.66 6,332 -8.55 0.0852
2024-11-14 2024-09-30 13F MONTROSE ENVIRONMENTAL GROUP COM 615111101 263,252 47,831 22.20 6,924 -27.88 0.0887
2024-08-14 2024-06-30 13F MONTROSE ENVIRONMENTAL GROUP COM 615111101 215,421 -44,289 -17.05 9,599 -5.63 0.1145
2024-05-15 2024-03-31 13F MONTROSE ENVIRONMENTAL GROUP COM 615111101 259,710 -111,890 -30.11 10,173 -14.80 0.1142
2024-02-14 2023-12-31 13F MONTROSE ENVIRONMENTAL GROUP COM 615111101 371,600 91,842 32.83 11,940 45.86 0.1318
2023-11-14 2023-09-30 13F MONTROSE ENVIRONMENTAL GROUP COM 615111101 279,758 279,758 8,186 0.0996
2022-02-14 2021-12-31 13F MONTROSE ENVIRONMENTAL GROUP COM 615111101 0 -99,384 -100.00 0 -100.00
2021-11-15 2021-09-30 13F MONTROSE ENVIRONMENTAL GROUP COM 615111101 99,384 -161,317 -61.88 6,136 -56.14 0.0484
2021-08-16 2021-06-30 13F MONTROSE ENVIRONMENTAL GROUP COM 615111101 260,701 -42,966 -14.15 13,989 -8.21 0.1053
2021-05-17 2021-03-31 13F MONTROSE ENVIRONMENTAL GROUP COM 615111101 303,667 -184,296 -37.77 15,241 0.89 0.1140
2021-02-16 2020-12-31 13F MONTROSE ENVIRONMENTAL GROUP COM 615111101 487,963 -190,395 -28.07 15,107 -6.50 0.1171
2020-11-16 2020-09-30 13F MONTROSE ENVIRONMENTAL GROUP COM 615111101 678,358 678,358 16,158 0.1541
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.