ConocoPhillips
US ˙ NYSE ˙ US20825C1045

SecurityCOP / ConocoPhillips
InstitutionMattern Capital Management, Llc
Latest Disclosed Ownership17,193 shares
Latest Disclosed Value $ 2,269,476
Mattern Capital Management, Llc reports 2.85% increase in ownership of COP / ConocoPhillips

On May 4, 2026 - Mattern Capital Management, Llc filed a 13F-HR form disclosing ownership of 17,193 shares of ConocoPhillips (US:COP) valued at $2,269,476 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 16,717 shares of ConocoPhillips. This represents a change in shares of 2.85% during the quarter. The current value of the position is $2,013,988 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.

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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)
2026-05-04 2026-03-31 13F CONOCOPHILLIPS COM 20825C104 17,193 476 2.85 2,269 45.08 0.2718
2026-01-29 2025-12-31 13F CONOCOPHILLIPS COM 20825C104 16,717 1,214 7.83 1,565 6.68 0.1848
2025-10-21 2025-09-30 13F CONOCOPHILLIPS COM 20825C104 15,503 2,968 23.68 1,466 30.43 0.1724
2025-07-21 2025-06-30 13F CONOCOPHILLIPS COM 20825C104 12,535 2,702 27.48 1,125 8.91 0.1351
2025-04-23 2025-03-31 13F CONOCOPHILLIPS COM 20825C104 9,833 1,714 21.11 1,033 28.20 0.1315
2025-02-03 2024-12-31 13F CONOCOPHILLIPS COM 20825C104 8,119 482 6.31 805 0.12 0.1049
2024-10-24 2024-09-30 13F CONOCOPHILLIPS COM 20825C104 7,637 1,051 15.96 804 6.77 0.1012
2024-08-02 2024-06-30 13F CONOCOPHILLIPS COM 20825C104 6,586 1,513 29.82 753 16.74 0.1041
2024-05-14 2024-03-31 13F CONOCOPHILLIPS COM 20825C104 5,073 5,073 646 0.0877
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.