Private Equity / Energy Investment Partnership

Yorktown Energy Partners X, L.P. — 13F Portfolio

New York, NY Private Fund managed by SEC-registered investment advisor (Yorktown Partners LLC) Institutional CIK: 0001577919
13F Score ?
33
3Y · Top 10 · Mgr Wt
13F Score ?
7Y · Top 10 · Mgr Wt
S&P 500 ?
80
Benchmark
$69M
AUM
+1.33%
2026 Q1
+52.82%
1-Year Return
+100.00%
Top 10 Concentration
+11.46%
Turnover
-10.24%
AUM Change
Since 2016
First Filing
4
# of Holdings

Fund Overview

13F Filed: 2026-05-15

As of 2026 Q1, Yorktown Energy Partners X, L.p. manages $69M in reported 13F assets , holds 4 positions with +100.00% top-10 concentration , and delivered a 1-year return of +52.82% on its disclosed equity portfolio. Filing 13F reports since 2016. View full holdings list →

About

Investment Strategy

Analytics Summary

Risk Profile

Key Personnel

Yorktown Partners LLC — General Partner & Investment Manager
Official 13F Filings — SEC EDGAR Key personnel and Fund Overview may contain mistakes

Activity Summary — 2026 Q1

Q1 2026 13F Filed: May 15, 2026

Top Buys

% $
Stock % Impact
No major buys detected

Top Sells

% $
Stock % Impact
-11.86%
-0.02%

Top Holdings

2026 Q1 Top 6 mgr. wt. · 2025 Q4+1.33%
Stock %
43.82%
23.55%
20.50%
12.13%
View All Holdings

Activity Summary

Latest
Market Value $69M
AUM Change -10.24%
New Positions 0
Increased Positions 0
Closed Positions 0
Top 10 Concentration +100.00%
Portfolio Turnover +11.46%
Alt Turnover +17.17%

Sector Allocation Trends

Quarterly History
Free View: Last 10 Quarters. Subscribe to see full history

Holdings Analysis

Size: % of Portfolio Color: Last Full-Quarter Return No data
Free: 10 quarters

Positions Dynamics

Visualizing Top 20 holdings weight history over the last 10 quarters.

Portfolio Analytics — Latest

Yorktown Energy Partners X, L.P. risk dashboard covering volatility, beta, value-at-risk, drawdowns, concentration, factor tilts, benchmark comparison, and stress testing for the latest disclosed portfolio.

Risk access
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Real-time Analytics
High-Conviction Alpha
AAPL 92.4
NVDA 88.1
MSFT 74.3
Strategy Guardian
Style Drift 0.12
Sector Rotation 0.38

Tracking institutional benchmark deviation

Scenario Lab
2008 GFC -32.4%
Covid-19 -18.1%
2022 Bear -24.7%
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Best Strategy vs. Benchmarks

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Edge Metrics Last 10 quarters only
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Down Capture

Strategy Backtester: Yorktown Energy Partners X, L.P.

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Risk insights! Identify periods when the fund lagged the benchmark – critical for timing entries.

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Underperformance Analysis — Top 10 Holdings vs SPY

Backtesting Yorktown Energy Partners X, L.P.'s top 10 holdings against SPY identified 22 underperformance periods. Worst drawdown: 2019-03 – 2021-11 (-99.1% vs SPY, 3 quarters). Currently underperforming.

Avg. lag: -17.5% vs SPY Avg. duration: 1.8 quarters
Backtest Snapshot — Top 10 Holdings (Mn-Weighted)

The ticker-level breakdown shows how each of Yorktown Energy Partners X, L.P.'s top holdings contributed to portfolio returns quarter by quarter. Strongest recent contributors inside the last 5 years of the quarterly Top 10 backtest window: METC (2023 Q2 – 2025 Q4, +65.7 pts), SWN (2021 Q3 – 2023 Q3, +29.5 pts), REPX (2021 Q3 – 2025 Q4, +6.4 pts), EPSN (2025 Q4 – 2025 Q4, +4.8 pts) .

Strategy ann.: 18.8% SPY ann.: 14.9% Period: 2017–2026
Best Recent Contributors — Last 5Y
All 4 recent top contributors beat SPY, which means this fund's strongest recent return drivers also outperformed the index over the same window.
2023 Q2 – 2025 Q4 • 11Q in Top 10 Beat SPY
METC
+71%
SPY
+29%
Contrib
+65.7%
2021 Q3 – 2023 Q3 • 9Q in Top 10 Beat SPY
SWN
+19%
SPY
+10%
Contrib
+29.5%
2021 Q3 – 2025 Q4 • 18Q in Top 10 Beat SPY
REPX
+50%
SPY
+27%
Contrib
+6.4%
2025 Q4 – 2025 Q4 • 1Q in Top 10 Beat SPY
EPSN
+30%
SPY
+-18%
Contrib
+4.8%
Stock return (green = beat SPY)   Stock return (red = lagged SPY)   SPY same period   Cumulative contribution during the last 5 years of the quarterly Mn-weighted Top 10 strategy

Frequently Asked Questions

What does Yorktown Energy Partners X, L.p. invest in?
Yorktown Energy Partners X, L.P. pursues a concentrated, fundamentals-driven energy strategy grounded in private equity disciplines. The mandate centers on backing companies that explore for, produce, transport, or service hydrocarbons, as well as selective exposure to energy transition assets where they align with the manager’s value framework. Typical investments include upstream exploration & production (E&P) firms, midstream pipeline and gathering operators, and niche oilfield services or infrastructure providers whose economics are closely tied to commodity development activity. At the strategy level, Yorktown Partners LLC evaluates assets based on resource quality, cost structure, management capability, balance sheet resilience, and the ability to grow intrinsic value under realistic commodity-price assumptions. The goal is to create value through operational improvements, disciplined capital allocation, and, over time, strategic exits via public markets, trade sales, or recapitalizations. While much of this activity occurs in private or illiquid structures, the fund’s public positions—those visible in the **13F Portfolio Composition**—often represent: - Legacy holdings in portfolio companies that have listed or merged into public entities. - Strategic stakes in listed energy companies where Yorktown sees a clear mispricing relative to asset value or development potential. - Equity positions obtained through restructurings, spin-offs, or other corporate actions. The public-equity sleeve is typically concentrated, with a small number of names dominating reported exposure, and with low turnover as the manager holds through multi-year development or restructuring cycles. For users, the Portfolio Simulator and Backtesting Service can be used to build a notional historical replication of this concentrated energy book to study its capital trajectory across different oil and gas price regimes.
What is Yorktown Energy Partners X, L.p.'s AUM?
Yorktown Energy Partners X, L.p. reported $69M in 13F assets as of 2026 Q1. Note: 13F AUM reflects only long equity positions reported to the SEC and may differ from total assets under management.
How concentrated is Yorktown Energy Partners X, L.p.'s portfolio?
Yorktown Energy Partners X, L.p. holds 4 disclosed positions. The top 10 holdings represent +100.00% of the reported portfolio, indicating a highly concentrated investment approach.
How to track Yorktown Energy Partners X, L.p. 13F filings?
Track Yorktown Energy Partners X, L.p.'s quarterly filings on SEC EDGAR or on this page — data is updated within days of each filing deadline. Subscribe to 13Foresight for position-change alerts.
Who manages Yorktown Energy Partners X, L.p.?
Yorktown Energy Partners X, L.p. is managed by Yorktown Partners LLC (General Partner & Investment Manager).

Disclaimer: 13Foresight is not a registered investment adviser, broker-dealer, or financial planner. All information on this site is provided solely for informational and educational purposes and does not constitute investment advice, a solicitation, or a recommendation to buy or sell any security. Portfolio backtests shown on this page are hypothetical and simulated — they do not represent actual trading results and were constructed with the benefit of hindsight. Actual results would differ materially. 13F filings disclose only long equity positions valued above $10,000, submitted up to 45 days after quarter-end; they do not capture short positions, options, bonds, cash, private investments, or non-U.S. securities. A fund's backtest performance may not reflect its actual returns, as managers frequently generate alpha through strategies not visible in 13F data. Past performance is not indicative of future results. All data sourced from public SEC EDGAR filings. Use at your own risk. Full Terms of Use.

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