Exxon Mobil Corporation
MX ˙ BMV ˙ US30231G1022
SecurityMX:XOM / Exxon Mobil Corporation
InstitutionMason & Associates Inc
Latest Disclosed Ownership14,168 shares
Latest Disclosed Value $ 2,429,337
Mason & Associates Inc reports 2.58% decrease in ownership of XOM / Exxon Mobil Corporation

On April 30, 2026 - Mason & Associates Inc filed a 13F-HR form disclosing ownership of 14,168 shares of Exxon Mobil Corporation (MX:XOM) valued at $2,429,337 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 14,543 shares of Exxon Mobil Corporation. This represents a change in shares of -2.58% during the quarter.

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)
2026-04-30 2026-03-31 13F EXXON MOBIL COM 30231G102 14,168 -375 -2.58 2,429 38.80 0.4706
2026-02-05 2025-12-31 13F EXXON MOBIL COM 30231G102 14,543 1,080 8.02 1,750 15.36 0.3294
2025-11-07 2025-09-30 13F EXXON MOBIL COM 30231G102 13,463 1,172 9.54 1,518 14.58 0.3057
2025-07-31 2025-06-30 13F EXXON MOBIL COM 30231G102 12,291 0 0.00 1,325 -9.38 0.3059
2025-04-17 2025-03-31 13F EXXON MOBIL COM 30231G102 12,291 -50 -0.41 1,462 10.10 0.3633
2025-01-14 2024-12-31 13F EXXON MOBIL COM 30231G102 12,341 232 1.92 1,328 -6.48 0.3123
2024-10-23 2024-09-30 13F EXXON MOBIL COM 30231G102 12,109 -188 -1.53 1,419 0.28 0.3541
2024-07-19 2024-06-30 13F EXXON MOBIL COM 30231G102 12,297 120 0.99 1,416 0.00 0.3766
2024-04-23 2024-03-31 13F EXXON MOBIL COM 30231G102 12,177 -9 -0.07 1,415 16.17 0.3776
2024-01-17 2023-12-31 13F EXXON MOBIL COM 30231G102 12,186 -1,313 -9.73 1,218 -23.25 0.3581
2023-10-20 2023-09-30 13F EXXON MOBIL COM 30231G102 13,499 -563 -4.00 1,587 5.24 0.5079
2023-07-21 2023-06-30 13F EXXON MOBIL COM 30231G102 14,062 -695 -4.71 1,508 -6.80 0.4451
2023-04-21 2023-03-31 13F EXXON MOBIL COM 30231G102 14,757 5,521 59.78 1,618 58.94 0.4950
2023-01-13 2022-12-31 13F EXXON MOBIL COM 30231G102 9,236 495 5.66 1,019 33.42 0.3252
2022-10-20 2022-09-30 13F EXXON MOBIL COM 30231G102 8,741 144 1.68 763 3.67 0.2702
2022-07-26 2022-06-30 13F EXXON MOBIL COM 30231G102 8,597 1,668 24.07 736 28.67 0.2586
2022-04-19 2022-03-31 13F EXXON MOBIL COM 30231G102 6,929 3,009 76.76 572 138.33 0.1748
2022-03-18 2021-12-31 13F EXXON MOBIL COM 30231G102 3,920 3,920 240 0.0729
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.