Arkolith/Funds/One Fin Capital Management LP

One Fin Capital Management LP

CIK 1753875
Holdings as of Mar 31, 2026·disclosed May 15, 2026·~45-day 13F lag·13F-HR
Active Filer

One Fin Capital Management LP holds a focused book of 19 stocks worth $259.3M as of Q1 2026 (disclosed May 15, 2026, a ~45-day 13F lag). This quarter they opened Aptiv PLC and trimmed Rocket Cos Inc-Class A. Their largest long position is Nextpower Inc-CL A at 14% of the equity book. They also disclosed $20.9M in put options (a bearish bet), shown separately below and excluded from the equity book.

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holdings, largest changes, and filing provenance.
Opened
6
new positions
Added to
3
existing
Trimmed
6
reduced
Sold out
5
exited

Concentration

Top-heavy: focused book

Top 5 holdings
48%
Top 10 holdings
75%
Top 20 holdings
100%

Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.

Direct sector allocation

90% mapped to company sectors

Information Technology
26%
Materials
14%
Consumer Discretionary
12%
ETF / fund or unclassified
10%
Financials
9%
Industrials
9%
Communication Services
8%
Health Care
7%

Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.

Biggest moves: latest quarter

Estimated $ traded · quarter-end prices, no cost basis

Bought
Trimmed / exited

Holdings: largest first

Bars show each stock's share of the portfolio. Click a row for its position history.

19 positions
#SecurityValueShares% PortLast moveHistory
1Nextpower Inc
CLASS A COM
$36.2M300.0K
13.9%
Held
2Lithium Argentina AG
NOTE 1.750% 1/1
$24.6M25.52M
9.5%
Held
3Norfolk Southn Corp
COM
$23.0M80.0K
8.9%
Held
4Warner Bros Discovery Inc
COM SER A
$20.9M760.0K
8.0%
+22%
Added · +135K sh
5Amrize Ltd
SHS
$18.9M338.0K
7.3%
Held
6Rocket Cos Inc
COM CL A
$17.1M1.20M
6.6%
−9.8%
Reduced · −130K sh
7Aptiv PLC
COM SHS
$15.6M225.0K
6.0%
New
New position
8Solstice Advanced Matls Inc
COM SHS
$14.5M190.0K
5.6%
−42%
Reduced · −135K sh
9Generac Hldgs Inc
COM
$13.1M67.0K
5.0%
New
New position
10PG&E Corp
COM
$11.0M625.0K
4.2%
New
New position
11Pinterest Inc
CL A
$10.8M590.0K
4.2%
New
New position
12Yeti Hldgs Inc
COM
$9.8M267.1K
3.8%
−11%
Reduced · −33K sh
13Perceptive Cap Solutions Cor
CL A ORD SHS
$9.3M843.5K
3.6%
+93%
Added · +407K sh
14Unitedhealth Group Inc
COM
$8.9M33.0K
3.4%
New
New position
15Cerence Inc
COM
$8.2M1.30M
3.2%
+81%
Added · +580K sh
16Driven Brands Hldgs Inc
COM
$6.3M500.0K
2.4%
−70%
Reduced · −1.1M sh
17Capital One Finl Corp
COM
$6.0M33.0K
2.3%
−75%
Reduced · −99K sh
18Primo Brands Corporation
CLASS A COM SHS
$2.8M150.0K
1.1%
New
New position
19Jeld-Wen Hldg Inc
COM
$2.4M1.91M
0.9%
−4.4%
Reduced · −88K sh
Showing all 19 positions

Largest options & derivatives disclosed

Put / call positions from the 13F — totals include every disclosed option leg

Put notional (bearish)$20.9M
TypeUnderlyingNotional valueUnderlying shares
PUT · bearishNVIDIA CORPNVDA$20.9M120K

13F filers disclose option positions at the market value of the underlying the contracts reference, not the premium paid. A put is a bearish bet (it gains if the stock falls); a call is bullish. “Underlying shares” is the share count the contracts control, not a share holding. These legs are excluded from the equity book, weighting, concentration and sector figures above.

Filing history

As-of date vs the date the SEC received each filing

QuarterAs ofFiledPositionsValueForm
Q1 2026Mar 31, 2026May 15, 202620$280.3M13F-HR
Q4 2025Dec 31, 2025Feb 17, 202619$308.8M13F-HR
Q3 2025Sep 30, 2025Nov 14, 202520$304.1M13F-HR
Q2 2025Jun 30, 2025Aug 14, 202518$295.8M13F-HR

Data source

Holdings from SEC EDGAR 13F-HR filings, updated quarterly ~45 days after quarter-end. Public domain. The book and weighting are long equity only; disclosed put/call options are listed separately and excluded from those totals. Price-derived performance is withheld until the price-source policy and freshness gate are green.