Official portrait: unitedstates/images (public domain; source GPO Member Guide)
Sen. Cynthia M. Lummis (R-WY)
House / Senate · Republican (most recent term) · WY · in Congress 2009–present · Bioguide ID L000571
Party history by chamber: House R 2009–2017, Senate R 2021–present. Source: term data in unitedstates/congress-legislators (CC0); party shown is as recorded per term there.
Estimated net worth (from public disclosures)
| Estimate | Report year | Low | Mid | High |
|---|---|---|---|---|
| (a) Estimated net worth at the earliest available report (2020); the member entered office earlier, in 2009 | 2020 | −$21,451,989 | −$5,028,496 | $11,394,998 |
| (b) Latest net worth estimate | 2025 | −$18,877,960 | $426,020 | $19,729,999 |
| (c) Estimated gain / loss, nominal dollars, 2020 → 2025 (5 years spanned) | 2020–2025 | −$30,272,958 | +$5,454,515 | +$41,181,988 |
Gain Low = latest Low − earliest High; Gain High = latest High − earliest Low (widest possible spread); Mid = latest Mid − earliest Mid.
Reliability flags (net worth): none for these two endpoints. Included in the recommended dollar-gain ranking.
Net worth by report year (mid; Low–High)
| Report year | Assets (mid) | Liabilities (mid) | Net worth mid | Low … High | Status / flags |
|---|---|---|---|---|---|
| 2020 | $10,046,506 | $15,075,001 | −$5,028,496 | −$21,451,989 … $11,394,998 | computed |
| 2021 | $10,054,506 | $75,000 | $9,979,506 | $3,549,012 … $16,409,999 | computed |
| 2022 | $15,667,518 | $0 | $15,667,518 | $6,235,036 … $25,100,000 | computed |
| 2023 | $14,920,518 | $32,500 | $14,888,018 | $5,726,037 … $24,049,999 | computed |
| 2024 | $15,495,518 | $32,500 | $15,463,018 | $6,126,037 … $24,799,999 | computed |
| 2025 | $15,426,020 | $15,000,000 | $426,020 | −$18,877,960 … $19,729,999 | computed |
- What this is: Net worth = Schedule A assets (each value range at its midpoint; low–high range shown) minus Schedule D liabilities (midpoints / ranges). Low = assets at range floors minus liabilities at range ceilings; Mid = midpoints; High = assets at ceilings minus liabilities at floors. Low and High are outer bounds of the reported ranges, not likely outcomes.
- What it excludes / understates: exact values (only ranges are reported); a personal residence is not reported as an asset (although a mortgage on it may be listed as a liability, which then lowers the estimate); retirement and federal accounts (e.g. Thrift Savings Plan, defined-benefit pensions) are only partly or not reported; assets of excepted/blind trusts, cash held below reporting thresholds, vehicles, household goods and most spouse/dependent items exempt from reporting are not included; liabilities on a personal residence, revolving credit under thresholds and loans to family may be omitted by filers.
- Open-ended top ranges (e.g. “Over $50,000,000”) are counted at their lower bound and flagged, so such values are understated.
- The change is a change in estimated net worth in nominal dollars (no inflation adjustment). It includes salary, gifts, inheritances, business income and re-valuation as well as investment results, and it is subject to range-bracket noise; it is not an investment return and implies nothing about conduct.
Read this first. Members report asset values only as ranges (e.g. “$15,001 – $50,000”), never exact dollars. Every figure below is an estimate computed from range midpoints, not a measured return. Figures cannot be interpreted as investment performance, and they do not show wrongdoing or skill. Methodology and limitations are at the end and in the project README. Sources: public financial disclosure reports filed with the Clerk of the U.S. House of Representatives and/or the Secretary of the Senate (Senate eFD), linked below.
Avg. annual change (geometric, est.)+9.1%
Simple average of years+10.7%
Years estimated4
Best / worst single year2021 +45%
2023 -5%
2023 -5%
Reliability flags: few years (4).
Sensitivity band for the average (all ranges at floor vs. all at ceiling, same holdings both years): +8.2% to +9.3%. This band is narrow because it moves both years together; the true uncertainty is larger — see the per-year “strict envelope” column and the limitations.
Estimated year-over-year change
Bars: midpoint estimate; whisker: same-position floor/ceiling band. Axis clipped to −100%…+150%. Years with insufficient traceable holdings are omitted.
| Year (t−1 → t) | Opening value (mid) | Closing value (mid) | Income (mid) | Buys (mid) | Sales (mid) | Est. gain | Same-position band | Strict envelope | Traced coverage | Status / flags |
|---|---|---|---|---|---|---|---|---|---|---|
| 2020→2021 | $6,758,002 | $6,758,002 | $3,010,001 | $0 | $0 | +44.5% | +40.2% … +45.5% | -111% … +200% | 67% | counted |
| 2021→2022 | $0 | $0 | $0 | $0 | $0 | n/a | n/a … n/a | n/a … n/a | 0% | excluded; not eligible: traced prior-year value below $50,000 |
| 2022→2023 | $15,369,515 | $14,532,515 | $33,101 | $0 | $0 | -5.2% | -7.8% … -4.6% | -124% … +114% | 98% | counted |
| 2023→2024 | $14,920,518 | $15,495,518 | $33,101 | $0 | $0 | +4.1% | +3.3% … +7.2% | -120% … +128% | 100% | counted |
| 2024→2025 | $15,067,514 | $14,925,014 | $43,102 | $0 | $0 | -0.7% | -1.1% … -0.6% | -122% … +120% | 97% | counted |
Filings used
Each annual-report year uses one filing (most recently filed version among originals/amendments whose Schedule A row count is ≥ 40% of the largest). Electronic (text) PDFs are parsed. Scanned/image-only filings are OCR-read and used only if they pass the explicit validation gates described in the project README (value/income coverage, two-engine agreement, exact bracket snapping, page completeness, year-to-year position continuity); such years are labelled OCR-derived below. Scanned filings that fail validation are listed as “insufficient data – scanned”.
| Report year | Doc ID | Type | Filed | Schedule A rows | Rows with unparsed value | Source (official filing) / SHA-256 |
|---|---|---|---|---|---|---|
| 2020 | 5a9f95fe-06e6-4abf-866f-d1d174e510e9 | Senate amendment | 05/02/2021 | 11 | 0 | Senate eFD reportd4987a2582b8c51ff69447de2772c2a5bd9e4361adf1afb21608fffd05a64c00 |
| 2021 | 87938bb0-9a26-4c8e-89fa-3582299f6ac3 | Senate annual | 05/16/2022 | 12 | 0 | Senate eFD reportc21df1bf40835ec022957fefc192706ec7dc7c91d0f4af001d1c0f21578cc612 |
| 2022 | 9f0704cd-d3e7-45d2-b88e-e2eda38936c5 | Senate annual | 05/15/2023 | 36 | 0 | Senate eFD report9e5c4c055660c8592120c95906043e2e82fff45482371aef932a6771ebf3aec2 |
| 2023 | 8dc381a6-f1a4-45d5-b2df-254b7c3fe23f | Senate annual | 05/14/2024 | 37 | 0 | Senate eFD report84fcee1b2a7e05f165edb2b8acfa6ad621d74d8ebc2979080f27d214c6a76754 |
| 2024 | b99b0faa-5189-4914-9258-3000419446f2 | Senate annual | 08/08/2025 | 37 | 0 | Senate eFD report675bd727a9ecd386f1daf9e355659dd4b12ea6e59587db13faf04918e7b50378 |
| 2025 | 1e9b68e7-a359-4b46-9621-d07d92c25689 | Senate annual | 08/13/2026 | 40 | 0 | Senate eFD report3a3b6beadb5573bd2c8b3534cdc3f99abc439c952a3dc3df6e13a5453ece35b6 |
Largest movers 2022→2023
| Position (as written in filing) | Owner | Kind | Opening range(s) | Closing range(s) | Buys (mid) | Sales (mid) |
|---|---|---|---|---|---|---|
| D.A. Davidson Retirement Account ⇒ VSMAX - Vanguard Small Cap Index Fd Admiral Shs | — | held | $100,001 - $250,000 | $15,001 - $50,000 | $0 | $0 |
| D.A. Davidson Retirement Account ⇒ HLGEX - Jpmorgan Mid Cap Growth Fund I Class | — | held | $100,001 - $250,000 | $50,001 - $100,000 | $0 | $0 |
| D.A. Davidson Retirement Account ⇒ WMFFX - Washington Mutual Investors Fund Cl F-2 Shs | — | held | $100,001 - $250,000 | $50,001 - $100,000 | $0 | $0 |
| D.A. Davidson Retirement Account ⇒ VFIAX - Vanguard 500 Index Fd Admiral Shs | — | held | $100,001 - $250,000 | $50,001 - $100,000 | $0 | $0 |
| D.A. Davidson Retirement Account ⇒ PRVIX - T. Rowe Price Small-Cap Value Fund - I Class | — | held | $100,001 - $250,000 | $50,001 - $100,000 | $0 | $0 |
| D.A. Davidson Retirement Account ⇒ VGIIX - Jpmorgan U.S. Value Fund Class I | — | held | $100,001 - $250,000 | $50,001 - $100,000 | $0 | $0 |
| D.A. Davidson Retirement Account ⇒ IGFFX - International Growth and Income Fd Cl F-2 Shs | — | held | $50,001 - $100,000 | $15,001 - $50,000 | $0 | $0 |
| D.A. Davidson Retirement Account ⇒ PIMSX - Virtus Newfleet Multi-Sector Short Term Bond Fu | — | held | $50,001 - $100,000 | $15,001 - $50,000 | $0 | $0 |
Largest movers 2023→2024
| Position (as written in filing) | Owner | Kind | Opening range(s) | Closing range(s) | Buys (mid) | Sales (mid) |
|---|---|---|---|---|---|---|
| Qualified Blind Trust | — | held | $100,001 - $250,000 | $500,001 - $1,000,000 | $0 | $0 |
| Arp & Hammond Hardware Company Company: Arp & Hammond Hardware Company (Cheyenne, WY) Desc | — | held | $1,000,001 - $5,000,000 | $1,000,001 - $5,000,000 | $0 | $0 |
| D.A. Davidson Retirement Account ⇒ RPIFX - T. Rowe Price Institutional Floating Rate Fund | — | held | $1,001 - $15,000 | $1,001 - $15,000 | $0 | $0 |
| D.A. Davidson Investment Account ⇒ JVLIX - John Hancock Fds III Disciplined Value Fund Cla | — | held | $1,001 - $15,000 | $1,001 - $15,000 | $0 | $0 |
| D.A. Davidson Retirement Account ⇒ PDBZX - PGIM Total Return Bond Fund Class Z | — | held | $15,001 - $50,000 | $15,001 - $50,000 | $0 | $0 |
| D.A. Davidson Retirement Account ⇒ VMFXX | — | held | $100,001 - $250,000 | $100,001 - $250,000 | $0 | $0 |
| Lummis Livestock Company LLC Company: Lummis Livestock Company LLC (Cheyenne, WY) Descript | — | held | $1,000,001 - $5,000,000 | $1,000,001 - $5,000,000 | $0 | $0 |
| Sweetgrass Land Co. LLC Company: Sweetgrass Land Co. LLC (Cheyenne, WY) Description: The s | — | held | $1,000,001 - $5,000,000 | $1,000,001 - $5,000,000 | $0 | $0 |
Largest movers 2024→2025
| Position (as written in filing) | Owner | Kind | Opening range(s) | Closing range(s) | Buys (mid) | Sales (mid) |
|---|---|---|---|---|---|---|
| D.A. Davidson Retirement Account ⇒ VMFXX | — | held | $100,001 - $250,000 | $1,001 - $15,000 | $0 | $0 |
| D.A. Davidson Retirement Account ⇒ RPIFX - T. Rowe Price Institutional Floating Rate Fund | — | held | $1,001 - $15,000 | $15,001 - $50,000 | $0 | $0 |
| Arp & Hammond Hardware Company Company: Arp & Hammond Hardware Company (Cheyenne, WY) Desc | — | held | $1,000,001 - $5,000,000 | $1,000,001 - $5,000,000 | $0 | $0 |
| D.A. Davidson Investment Account ⇒ JVLIX - John Hancock Fds III Disciplined Value Fund Cla | — | held | $1,001 - $15,000 | $1,001 - $15,000 | $0 | $0 |
| D.A. Davidson Retirement Account ⇒ PDBZX - PGIM Total Return Bond Fund Class Z | — | held | $15,001 - $50,000 | $15,001 - $50,000 | $0 | $0 |
| Lummis Livestock Company LLC Company: Lummis Livestock Company LLC (Cheyenne, WY) Descript | — | held | $1,000,001 - $5,000,000 | $1,000,001 - $5,000,000 | $0 | $0 |
| Sweetgrass Land Co. LLC Company: Sweetgrass Land Co. LLC (Cheyenne, WY) Description: The s | — | held | $1,000,001 - $5,000,000 | $1,000,001 - $5,000,000 | $0 | $0 |
| D.A. Davidson Investment Account ⇒ TRBCX - T. Rowe Price Blue Chip Growth Fund Inc. | — | held | $1,001 - $15,000 | $1,001 - $15,000 | $0 | $0 |
Method (summary)
- Schedule A asset rows are read from each annual report; the dollar range for each row is converted to its midpoint. Open-ended top ranges (“Over $50,000,000”) are excluded from the traced set and counted as a coverage loss.
- Positions are matched year to year by owner code (self/SP/DC/JT) + normalised asset name. A position that appears only in year t is included only if Schedule B shows a purchase of it in year t (opening value 0); a position that disappears is included only if Schedule B shows a sale (closing value 0). Otherwise it is excluded as unexplained.
- Estimated gain = (closing − opening + reported income − purchases + sale proceeds) ÷ opening, all at midpoints, for the traced positions. “Capital gains” income is not added again (it is already in value change and sale proceeds).
- A year counts only if traced opening value ≥ $50,000 and traced coverage ≥ 60% of the opening midpoint. A member is ranked only with ≥ 3 such years (exactly 2 = “limited data”, shown but unranked). Average = geometric mean of (1+yearly estimate).
Limitations
- Ranges are wide (up to a factor of 5 or more, and up to $50M+ open-ended); a holding can move between ranges without any real change in value, and stay in a range while moving materially. Yearly estimates are therefore noisy; the “strict envelope” shows the mathematical worst/best case and is typically wider than ±100%.
- Purchases and sales are only disclosed as ranges and only for transactions over $1,000; partial sales, dividend reinvestment, spousal/dependent accounts and retirement-plan funds are reported inconsistently. Excepted/blind trusts, personal residences and certain pensions are not reported at all.
- Filers sometimes change how they list assets (e.g. listing a brokerage account vs. its individual holdings), which can make positions untraceable across years; these are excluded rather than guessed.
- Asset values in an annual report are as of Dec 31 of the reporting year; the report year t−1→t covers that calendar year. Late or amended filings are used when filed; extensions can delay them.
- The text of these reports is machine-parsed from PDFs; parse errors are possible. Every number links back to the cited filing. This is not investment advice.
- Use of these filings is restricted by 5 U.S.C. § 105(c) (no unlawful, commercial or credit-rating purpose, and none for solicitation of money).
Generated 2026-10-01 by an automated pipeline. Data: Office of the Clerk, U.S. House of Representatives (disclosures-clerk.house.gov); member roster: unitedstates/congress-legislators (CC0).