Vision One Management Partners, LP — 13F Holdings & Portfolio
CIK 1979969 · latest 13F-HR filed 2026-08-14
Vision One Management Partners, LP manages $277.8M in 13F-reported U.S. long-equity assets across 8 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are HXL (23.54%), VVV (17.38%), NGVT (14.38%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 1 new position and exited 2; 6 existing positions rose in reported value and 1 fell.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
Long-equity book
Distinct positions
Filed 2026-08-14
vs 2026-03-31
Portfolio charts
Latest quarter's book, what changed, and how the portfolio has evolved across filings.
Portfolio map
Q2 26Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.
Sector mix
% of 13F valueSectors from each company's SIC code; funds and ETFs grouped separately.
Biggest buys and sells
Q1 26 → Q2 26Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.
13F assets and positions
4 quartersTotal reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.
Top positions over time
reported valueThe eight largest current positions, valued at each quarter end.
Concentration
top 10 = 100%Cumulative share of the portfolio held in the largest N positions.
As of the firm’s regulatory filing dated Mar 30, 2026.
SUITE 601
MIAMI, FL 33131
| Name | Title / Status | Ownership | Type |
|---|---|---|---|
| CASTANEDA, EDUARDO Control | CHIEF COMPLIANCE OFFICER since Oct 2024 | Less than 5% | Individual |
| MASIUK, ALEKSEI, NMN Control | CHIEF FINANCIAL OFFICER since Dec 2024 | Less than 5% | Individual |
| MATHER, COURTNEY, RICHARD Control | CHIEF EXECUTIVE OFFICER/CHIEF INVESTMENT OFFICER since Mar 2021 | Less than 5% | Individual |
| VISION ONE MANAGEMENT PARTNERS GP, LLC Control | GENERAL PARTNER since Mar 2021 | Less than 5% | Domestic Entity |
| VISION ONE MANAGEMENT PARTNERS HOLDINGS, LP Control | SOLE LIMITED PARTNER since Mar 2021 | 75% or more | Domestic Entity |
| WALLACE, DENNIS, FRANKLIN Control | CHIEF DEVELOPMENT OFFICER since Mar 2021 | Less than 5% | Individual |
| MATHER, COURTNEY, RICHARD Control Indirect owner via VISION ONE MANAGEMENT PARTNERS HOLDINGS, LP | LIMITED PARTNER since Mar 2021 | 50–75% | Individual |
| MATHER, COURTNEY, RICHARD Control Indirect owner via VISION ONE MANAGEMENT PARTNERS GP, LLC | MEMBER/DIRECTOR since Mar 2021 | 75% or more | Individual |
| VISION ONE MANAGEMENT PARTNERS GP, LLC Control Indirect owner via VISION ONE MANAGEMENT PARTNERS HOLDINGS, LP | GENERAL PARTNER since Mar 2021 | General partner, trustee or manager | Domestic Entity |
Ownership & leadership changes · 3 filings with changes since Dec 9, 2022
From the firm’s regulatory filings, newest first. Dates are filing dates: a filing that no longer lists someone does not say when they left.
- No longer listedHARPER, STEPHEN, JOSEPH · DIRECTOR · General partner, trustee or manager · indirect via VISION ONE MANAGEMENT PARTNERS GP, LLC · control person · listed since Mar 2021
- No longer listedWALLACE, DENNIS, FRANKLIN · DIRECTOR · General partner, trustee or manager · indirect via VISION ONE MANAGEMENT PARTNERS GP, LLC · control person · listed since Mar 2021
- AddedMASIUK, ALEKSEI, NMN · CHIEF FINANCIAL OFFICER · Less than 5% · control person
- No longer listedHEBERT, DANIEL, BENOIT LEONARD · CHIEF OPERATING OFFICER/CHIEF COMPLIANCE OFFICER · Less than 5% · control person · listed since Mar 2021
- No longer listedHEBERT, DANIEL, BENOIT LEONARD · MEMBER/DIRECTOR · General partner, trustee or manager · indirect via VISION ONE MANAGEMENT PARTNERS GP, LLC · control person · listed since Mar 2021
- AddedCASTANEDA, EDUARDO · CHIEF COMPLIANCE OFFICER · Less than 5% · control person
- ListedHARPER, STEPHEN, JOSEPH · DIRECTOR · General partner, trustee or manager · indirect via VISION ONE MANAGEMENT PARTNERS GP, LLC · control person
- ListedHEBERT, DANIEL, BENOIT LEONARD · CHIEF OPERATING OFFICER/CHIEF COMPLIANCE OFFICER · Less than 5% · control person
- ListedHEBERT, DANIEL, BENOIT LEONARD · MEMBER/DIRECTOR · General partner, trustee or manager · indirect via VISION ONE MANAGEMENT PARTNERS GP, LLC · control person
- ListedMATHER, COURTNEY, RICHARD · CHIEF EXECUTIVE OFFICER/CHIEF INVESTMENT OFFICER · Less than 5% · control person
- ListedMATHER, COURTNEY, RICHARD · LIMITED PARTNER · 50–75% · indirect via VISION ONE MANAGEMENT PARTNERS HOLDINGS, LP · control person
- ListedMATHER, COURTNEY, RICHARD · MEMBER/DIRECTOR · 75% or more · indirect via VISION ONE MANAGEMENT PARTNERS GP, LLC · control person
- ListedVISION ONE MANAGEMENT PARTNERS GP, LLC · GENERAL PARTNER · Less than 5% · control person
- ListedVISION ONE MANAGEMENT PARTNERS GP, LLC · GENERAL PARTNER · General partner, trustee or manager · indirect via VISION ONE MANAGEMENT PARTNERS HOLDINGS, LP · control person
- ListedVISION ONE MANAGEMENT PARTNERS HOLDINGS, LP · SOLE LIMITED PARTNER · 75% or more · control person
- ListedWALLACE, DENNIS, FRANKLIN · CHIEF DEVELOPMENT OFFICER · Less than 5% · control person
- ListedWALLACE, DENNIS, FRANKLIN · DIRECTOR · General partner, trustee or manager · indirect via VISION ONE MANAGEMENT PARTNERS GP, LLC · control person
Quarter-over-quarter changes
Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.
Top Adds (vs prior quarter)
- VALVOLINE INC$28.7M +146.2%
- HEXCEL CORP NEW$12.5M +23.6%
- TENNANT CO$8.3M +31.8%
- INGEVITY CORP$3.1M +8.3%
- POWELL INDS INC$2.1M +5.9%
Vision One Management Partners, LP Holdings (2026-06-30)
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | HEXCEL CORP NEW | HXL | 428291108 | $65.4M | 23.54% | 653,309 | SH |
| 2 | VALVOLINE INC | VVV | 92047W101 | $48.3M | 17.38% | 1,220,688 | SH |
| 3 | INGEVITY CORP | NGVT | 45688C107 | $40.0M | 14.38% | 535,082 | SH |
| 4 | POWELL INDS INC | POWL | 739128106 | $37.2M | 13.41% | 130,054 | SH |
| 5 | CHEMOURS CO | CC | 163851108 | $35.3M | 12.71% | 1,720,189 | SH |
| 6 | TENNANT CO | TNC | 880345103 | $34.3M | 12.34% | 391,593 | SH |
| 7 | LINDSAY CORP | LNN | 535555106 | $9.7M | 3.48% | 78,150 | SH |
| 8 | MCGRATH RENTCORP | MGRC | 580589109 | $7.7M | 2.76% | 63,359 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-06-30 | 2026-08-14 | $277.8M | 8 | 0001636587-26-000068 |
| 2026-03-31 | 2026-05-15 | $232.0M | 9 | 0001636587-26-000033 |
| 2025-12-31 | 2026-02-18 | $178.2M | 10 | 0001636587-26-000008 |
| 2025-09-30 | 2025-11-17 | $158.9M | 12 | 0001636587-25-000059 |
SUITE 601
MIAMI, FL 33131