Colorado · Nonprofit
ANTIQUARIAN BOOK SCHOOL FOUNDATION
ANTIQUARIAN BOOK SCHOOL FOUNDATION (Colorado) receives grants from 2 organizations whose IRS filings report $15,900 to it, the largest being THE LOUISE H & DAVID S INGALLS FDN ($15,000). 1 of them have funded it in more than one year.
- Revenue FY2025
- $205k
- Funders on record
- 2
- Grants received
- $16k
- Net assets
- $1.4M
What Antiquarian Book School Foundation does
Mission
To educate librarians, collectors, and aspiring book sellers in best practices for handling and selling books.
As stated on its FY2025 Form 990.
Program
The sole purpose of the Antiquarian Book School Foundation (absf) is to educate librarians, collectors, and aspiring book sellers in best practices for handling and selling books. We provide an annual week-long seminar where leading specialists share their knowledge, skills and professional experiences with rare book and special collection librarians from university libraries, public libraries, historical societies and ""friend"" groups of such institutions as well as aspiring booksellers and collectors in a comprehensive survey of the rare book market, both antiquarian and modern. (continued on schedule o)basic procedures and problems are discussed both formally and informally through a series of lectures, discussions, demonstrations and practical hands-on workshops with emphasis on cataloging, pricing, restoration and maintenance, and the tools and materials of book production as well as bookselling in the electronic age.the Antiquarian Book School Foundation (absf) is an independent, nonprofit, and tax-exempt educational institution focused on promoting, maintaining, and expanding the standards of the antiquarian book trade. Cabs-minnesota, which is administered by the absf, is…
$152,809 spentof which $9,590 as grants$55,900 earned by the program100% of program spending
The program described on its FY2025 Form 990. Program spending in total: $152,809.
The organization over time
Each line starts at 100 in 2018, so what you read is the shape rather than the size: 150 means half as much again as 2018, 50 means half. The number beside each label in the key is where it ended. The shaded band is where the middle 50% of its peers' revenue would sit, given their growth.
Balance sheet
Total assets and total liabilities at each year end, in dollars. The largest one-year move in total assets was 2021 to 2022, from $1.3M to $1.1M (−17%).
How it's funded, over time
Each bar is one year's revenue split into where it came from, and every bar is the same height — these are shares, not amounts, so a year that raised twice as much looks the same size. Hover a bar for the split.
45% of ANTIQUARIAN BOOK SCHOOL FOUNDATION’s revenue is contributions — about as donation-reliant as the typical peer (57% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 4 of the last 8 reported years ran a deficit.
reserve
Leadership and staff
The officers, directors, trustees and key employees listed on each return. Joined and no longer listed compare each filing with the year before, matching people by surname and first initial; a year after a gap, or a roster under three people, has no comparison.
Chief executive
Kathleen Lindeman
Executive director
As listed on its FY2025 Form 990.
Who funds it, year by year
2017 → 2023: the base held at 1 funder, grant income fell $15k → $200.
From the IRS filings of ANTIQUARIAN BOOK SCHOOL FOUNDATION’s funders (the co-funder graph). Association, not causation. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
How concentrated its funding is
ANTIQUARIAN BOOK SCHOOL FOUNDATION leans on a few funders — its largest provides 94% of grant income and the top three 100%; half comes from just 1 funder.
the vertical line marks half of all grant income — 1 funder to its left
Largest funder’s share by year: 2017 100% · 2020 100% · 2021 100% · 2022 100% · 2023 100% — broadly stable.
“Effective funders” = inverse Herfindahl index (1 / Σ shareᵢ²) — the number of equal-sized funders that would give the same concentration. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Where its funders are
ANTIQUARIAN BOOK SCHOOL FOUNDATION draws 100% of its grant income from funders outside Colorado, across 2 states in all.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Against its field
ANTIQUARIAN BOOK SCHOOL FOUNDATION runs a healthier operating margin than half of the 16,849 education nonprofits its size.
this organization peer median middle 50% of peers· 16,849 education nonprofits $100k–$1M, FY2025
Organizations like ANTIQUARIAN BOOK SCHOOL FOUNDATION
Organizations whose mission and program text most resemble this one, by semantic similarity over every organization in the US filings — the closest peers, and often the clearest route to shared or prospective funders.
In Colorado
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
89% of spending goes to programs.
Governance
Public support
75%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Footprint & structure
Files a return copy in 2 states
Screen this organization
A dated, signed PDF of the compliance screen for ANTIQUARIAN BOOK SCHOOL FOUNDATION: IRS status (Business Master File, Publication 78, auto-revocation), the OFAC sanctions lists, the Internal Revenue Bulletin, and California registration, with the Rev. Proc. 2018-32 §8.01 reliance elements stated element by element. Generated from the current files at the moment you download it.
Screens are triage, not determinations; a source that cannot be read reports not screened, never clear. Screen this nonprofit · How the screen works · on the API as GET /api/screening/{ein}?format=pdf
Questions and answers
- Who funds ANTIQUARIAN BOOK SCHOOL FOUNDATION?
- ANTIQUARIAN BOOK SCHOOL FOUNDATION (Colorado) receives grants from 2 organizations whose IRS filings report $15,900 to it, the largest being THE LOUISE H & DAVID S INGALLS FDN ($15,000). 1 of them have funded it in more than one year.
- How many funders does ANTIQUARIAN BOOK SCHOOL FOUNDATION have?
- IRS filings report 2 organizations giving $15,900 in grants to ANTIQUARIAN BOOK SCHOOL FOUNDATION, 1 of which have funded it in more than one year.
- Who is the largest funder of ANTIQUARIAN BOOK SCHOOL FOUNDATION?
- THE LOUISE H & DAVID S INGALLS FDN is the largest funder on record, with $15,000 in grants. The full list of funders is on this page.
- How can an organization like ANTIQUARIAN BOOK SCHOOL FOUNDATION find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in Colorado. The funding by cause and by state pages list the largest funders for a given area and how to approach them.
Play a game about who funds Antiquarian Book School →
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2025 (financials across 2018–2025), and the filings of 2 funders that report grants to it. “On record” means captured in the filings we have parsed — a funder that does not e-file, or whose grant detail is not itemized, will not appear. Filings run roughly 12–24 months behind. Trends on this page end at FY2023, the last fiscal year that has finished arriving; later years are shown and marked, and move no figure. Data on this page was exported October 14, 2026. What this page cannot tell you · view filing