Official portrait: unitedstates/images (public domain; source GPO Member Guide)
Rep. Mike Bost (R-IL)
House · Republican (most recent term) · IL-12 · in Congress 2015–present · Bioguide ID B001295
Party history: R 2015–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 before entering office (report year 2015, the member's first year in office) | 2015 | −$550,991 | −$170,496 | $209,998 |
| (b) Latest net worth estimate | 2025 | $49,025 | $395,012 | $740,999 |
| (c) Estimated gain / loss, nominal dollars, 2015 → 2025 (10 years spanned) | 2015–2025 | −$160,973 | +$565,508 | +$1,291,990 |
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 |
|---|---|---|---|---|---|
| 2015 | $379,504 | $550,001 | −$170,496 | −$550,991 … $209,998 | computed |
| 2016 | $404,004 | $550,001 | −$145,996 | −$536,991 … $244,998 | computed |
| 2017 | $404,004 | $550,001 | −$145,996 | −$536,991 … $244,998 | computed |
| 2018 | $471,505 | $582,502 | −$110,996 | −$537,990 … $315,997 | computed |
| 2019 | $421,507 | $550,001 | −$128,494 | −$534,986 … $277,998 | computed |
| 2020 | $487,507 | $615,002 | −$127,495 | −$610,986 … $355,996 | computed |
| 2021 | $570,508 | $615,002 | −$44,494 | −$559,984 … $470,996 | computed |
| 2022 | $349,009 | $407,501 | −$58,492 | −$362,982 … $245,998 | computed |
| 2023 | $617,512 | $407,501 | $210,011 | −$247,976 … $667,998 | computed |
| 2024 | $514,512 | $175,000 | $339,511 | $31,023 … $647,999 | computed |
| 2025 | $570,012 | $175,000 | $395,012 | $49,025 … $740,999 | 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.
Limited data – not ranked. Only 2 comparable year-pair(s) could be computed (minimum 3 to rank). 11 annual filing(s) were usable (text-readable, validated OCR, or validated X-mark decoding) and 0 scanned/image-only filing(s) could not be used (older layouts failing validation, small amendments not integrated). See the method-per-year section below.
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2015→2016 | $280,502 | $305,002 | $100 | $0 | $0 | +8.8% | +8.5% … +9.6% | -91% … +108% | 74% | counted |
| 2016→2017 | $240,002 | $240,002 | $0 | $0 | $0 | +0.0% | +0.0% … +0.0% | -92% … +92% | 59% | excluded; not eligible: traced coverage 59% < 60% |
| 2017→2018 | $32,500 | $32,500 | $100 | $0 | $0 | +0.3% | +0.0% … +0.4% | -108% … +108% | 8% | excluded; not eligible: traced prior-year value below $50,000 |
| 2018→2019 | $75,501 | $75,501 | $0 | $0 | $0 | +0.0% | +0.0% … +0.0% | -68% … +68% | 16% | excluded; not eligible: traced coverage 16% < 60% |
| 2019→2020 | $250,001 | $350,001 | $3,750 | $0 | $0 | +41.5% | +35.0% … +44.3% | -59% … +142% | 59% | excluded; not eligible: traced coverage 59% < 60% |
| 2020→2021 | $56,502 | $56,502 | $201 | $0 | $0 | +0.4% | +0.0% … +0.4% | -136% … +137% | 12% | excluded; not eligible: traced coverage 12% < 60% |
| 2021→2022 | $64,502 | $57,002 | $0 | $0 | $0 | -11.6% | -12.7% … -5.3% | -143% … +119% | 11% | excluded; not eligible: traced coverage 11% < 60% |
| 2022→2023 | $183,002 | $291,002 | $201 | $32,500 | $0 | +41.4% | +31.3% … +46.0% | -74% … +156% | 52% | excluded; not eligible: traced coverage 52% < 60%; many new/exited positions |
| 2023→2024 | $477,510 | $332,010 | $201 | $0 | $8,000 | -28.8% | -30.0% … -24.8% | -119% … +61% | 77% | counted |
| 2024→2025 | $241,503 | $241,503 | $201 | $0 | $0 | +0.1% | +0.0% … +0.1% | -74% … +74% | 47% | excluded; not eligible: traced coverage 47% < 60% |
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 |
|---|---|---|---|---|---|---|
| 2015 | 10011495 | House annual | 6/14/2016 | 10 | 0 | 10011495.pdfb40910eb8894d3ebde449a34509d92ff8d146b3e6ef3d632c1f78228b695f68e |
| 2016 | 10016069 | House annual | 5/9/2017 | 11 | 0 | 10016069.pdf02c18f659f9e3c45ddf2365db6ee0cf62d28bf1b2f082733f76097afa4868da9 |
| 2017 | 10021799 | House annual | 6/12/2018 | 9 | 0 | 10021799.pdf6c2e7c0072f673958c213fd15353cde83489513d1c4bb7713171af3a7a54374f |
| 2018 | 10026791 | House annual | 5/9/2019 | 10 | 0 | 10026791.pdf3f82c476876fc981c03672422d07c0eed5b48ec1b52972ca80d66d95bc0675a1 |
| 2019 | 10038143 | House annual | 8/13/2020 | 14 | 0 | 10038143.pdf69914b6766622f96a043a15e252c5b442e54eac8188511d7258327d5206999b5 |
| 2020 | 10042894 | House annual | 8/11/2021 | 14 | 0 | 10042894.pdf0a824435172e9b8c85266f79d70ef08ef943a48107ba9e292499b2409d5d2526 |
| 2021 | 10047859 | House annual | 5/13/2022 | 16 | 0 | 10047859.pdfeefcba31ba8d69bc4094acbab7c993c5a682924d1bfea457b8be3d69569abc4f |
| 2022 | 10052831 | House annual | 6/12/2023 | 19 | 0 | 10052831.pdf97db595e29e692a2663c11d9fae5361f0a59687517cd9d79a2c6221fad96c4ca |
| 2023 | 10057580 | House annual | 6/5/2024 | 24 | 0 | 10057580.pdff5f72fb2e3fa08219858da908b19c0bc67e0dfadd97b194acfcc06ab74f0c906 |
| 2024 | 10068493 | House annual | 8/13/2025 | 24 | 0 | 10068493.pdff051cfce7f1724c7e6af9e848da1aeacbfaed6b4bd4651d6eb4ac2536fc4c35c |
| 2025 | 10076261 | House annual | 8/12/2026 | 26 | 0 | 10076261.pdf46feb03b28e44702dc8a891590cf31528cf0828e8042fdd19ff793f9eeef3001 |
Largest movers 2015→2016
| Position (as written in filing) | Owner | Kind | Opening range(s) | Closing range(s) | Buys (mid) | Sales (mid) |
|---|---|---|---|---|---|---|
| First Bank & Trust Checking account | JT | held | $1,001 - $15,000 | $15,001 - $50,000 | $0 | $0 |
| Contract for Deed - Stephen Bost | — | held | $100,001 - $250,000 | $100,001 - $250,000 | $0 | $0 |
| Putnam Investments ⇒ Putnam Global Health Care FD-a | SP | held | $15,001 - $50,000 | $15,001 - $50,000 | $0 | $0 |
| Putnam Investments ⇒ Putnam Growth Opportunities - a | SP | held | $15,001 - $50,000 | $15,001 - $50,000 | $0 | $0 |
| Polar Investments IRa ⇒ american FDS Growth FD of amer FD a | — | held | $15,001 - $50,000 | $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) |
|---|---|---|---|---|---|---|
| First Bank & Trust [BA] | JT | held | $100,001 - $250,000; $50,001 - $100,000 | $50,001 - $100,000; $50,001 - $100,000 | $0 | $0 |
| Polar Investment ⇒ LL Flooring Holdings, Inc. Common Stock (LL) [ST] | SP | held | $1,001 - $15,000 | None | $0 | $0 |
| Polar Investment ⇒ Becton, Dickinson and Company Common Stock (BDX) [ST] | SP | held | $1,001 - $15,000 | $1,001 - $15,000 | $0 | $8,000 |
| Polar Investment ⇒ Embecta Corp. - Common Stock (EMBC) [ST] | SP | held | $1,001 - $15,000 | $1 - $1,000 | $0 | $0 |
| Polar Investment ⇒ Warner Bros. Discovery, Inc. - Series A Common Stock (WBD) [ST] | SP | held | $1,001 - $15,000 | $1 - $1,000 | $0 | $0 |
| Polar Investment ⇒ Lithium Americas (LAAC) [ST] | SP | held | $1,001 - $15,000 | $1 - $1,000 | $0 | $0 |
| Polar Investment ⇒ fuboTV Inc. Common Stock (FUBO) [ST] | SP | held | $1,001 - $15,000 | $1 - $1,000 | $0 | $0 |
| Polar Investment ⇒ Lithium Americas Corp. Common Shares (LAC) [ST] | SP | held | $1,001 - $15,000 | $1 - $1,000 | $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).