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· Public charity

Heat and Frost Insulators and Allied Workers Local Union No 16

To promote the welfare, working conditions, and quality of members in the jurisdictional area of local 16.

$208k
Granted FY2025still arriving
6
Grants FY2025still arriving
2
States reached
$11k
Largest
01What it funds
01100% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2018 to 2025.

Health$65kEmployment$65kEnvironment$20kMembership Benefit$19kPublic Benefit$10kEducation$8kHuman Services$5k
02FY2025 · 6 grants

Where the money goes

Grants by size, and the largest recipients.

How this is measured
The 6 grants below total $51,500, the rows itemized in this filing. The $208,228 headline is the total grant expense on the return; the other $156,728 is giving the schedule does not break out (grants under the $5,000 itemization floor, grants to individuals, grants on other schedules). Every figure below describes the itemized rows only.

By grant size · FY2025

  • Under $10k4 grants · $31k
  • $10k–50k2 grants · $21k
$8,500
Median grant
2
States reached
$7.8M
Total assets
Largest grants
RecipientAmount
CCBCTC$11,000
ACIS$10,000
MESOTHELIOMA RESEARCH FOUNDATION$8,500
CONTRA COSTA LABOR-TO-LABOR$7,500
NAPA-SOLANO BLDG TRADES COUNCIL$7,500
SACRAMENTO-SIERRA BLDG TRADES$7,000
02The need
03

Does the money reach high-need areas?

Each grant placed by the hardship in its grantee’s ZIP, against the area’s typical level.

show:

Dollar for dollar, its grants (FY18–25) land where the poverty rate runs at 10%, against an area that typically sits at 8%. 90% of its dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 8%SMCLC COPE BANQUET: $8k → 7%SBCTC ISSUES ACCOUNT: $8k → 8%MESOTHELIOMA RESEARCH FOUNDATION: $8k → 9%MESOTHELIOMA RESEARCH FOUNDATION: $9k → 9%MESOTHELIOMA RESEARCH FOUNDATION: $12k → 10%HEAT AND FROST INSULATORS AND ALLIED WORKERS LOCAL: $8k → 10%CONTRA COSTA LABOR-TO-LABOR: $8k → 10%SACRAMENTO-SIERRA BLDG TRADES: $7k → 12%COMMITTEE TO ELECT STEVE SISOLAK: $10k → 13%INT'L ASSOC OF HEAT AND FROST INSULATORS PAC FUND: $9k → 11%MESOTHELIOMA RESEARCH FOUNDATION: $9k → 9%MESOTHELIOMA RESEARCH FOUNDATION: $6k → 10%NAPA-SOLANO BLDG TRADES COUNCIL: $8k → 10%CONTRA COSTA LABOR-TO-LABOR: $8k → 10%NO ON PROP 22: $7k → 12%INT'L ASSOC OF HEAT AND FROST INSULATORS PAC FUND: $6k → 11%CCBCTC: $11k → 9%MESOTHELIOMA RESEARCH FOUNDATION: $6k → 10%BCTC SPECIAL EVENTS: $7k → 10%CONTRA COSTA LABOR-TO-LABOR: $7k → 10%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount
How this is measured
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty line in the grantee’s ZIP, averaged from the tracts in that ZIP.
How this is measured
US grants placed by each grantee’s ZIP, which can differ from where services are delivered. Need from public data (U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA), shown as context about the area, never attributed to the funder’s giving.
03Its grantees
repeat funding

Who it funds again

Organizations funded in more than one year, against those funded once.

57%of every dollar goes to organizations it has funded before.
$108k · 4 repeat orgs$83k to everyone else

Grantees it renews have grown median revenue +2% since the first grant, against 0% for those funded once.

4 repeat relationships: 3 still active in FY2025, 1 since wound down; 3 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

4
8

Total granted

$108k
$58k

Median revenue growth · since first grant

+2%
0%

Still filing today

75%
50%

New vs renewed · share of each year

In FY2025, 52% of grant dollars renewed an existing relationship; $25k went to new ones.

50%100%’18’19’20’21’22’23’24’25
RenewedFirst-time

Where new relationships form · theme of each grantee’s first grant

’18’19’20’21’22’23’24’25
HealthHuman ServicesOther
How this is measured
First-time means a grantee’s first year in the filing window; renewed means funded in an earlier year too. The renewed share climbs naturally as a portfolio matures, so the signal is a year that bucks it (a wave of new grantees). The earliest year is left-censored: relationships that predate the data read as new. Theme is the grantee’s IRS cause.

Backed again, and grew

  • MR
    MESOTHELIOMA RESEARCH FOUNDATION OF AMERICA
    6× · 2019–2025 · $49k · revenue -6%
  • CC
    CONTRA COSTA LABOR COUNCIL AFL-CIO
    3× · 2023–2025 · $22k · revenue +70%
  • IA
    INT'L ASSOC OF HEAT AND FROST INSULATORS PAC FUND
    3× · 2019–2021 · $20k

Funded once

  • CT
    COMMITTEE TO ELECT STEVE SISOLAK
    one grant, 2022 · $10k
  • HA
    HEAT AND FROST INSULATORS AND ALLIED WORKERS LOCAL
    one grant, 2022 · $8k
  • SI
    SBCTC ISSUES ACCOUNT
    one grant, 2018 · $8k
How this is measured

Repeat means funded in two or more distinct years. Growth and survival are read from each grantee’s own subsequent IRS filings.

04Its field

Closest unfunded matches

The nonprofits that most resemble its grantees but are not funded by it, scored along the direction from the rest of the field toward the portfolio. A resemblance in what they say they do, not a recommendation.

1
San Francisco Labor Council

To organize all branches of labor in order that each may cooperate with all others in establishing and maintaining, in the various crafts and callings, the highest possible standard of living for their members.

—
2
California Labor Federation Afl-Cio

The primary purposes of the organization are the study of economic and social conditions; the pursuit of policies aimed at effecting a more equal distribution of wealth; and the promotion of full employment.

—
3
Sacramento Central Labor Council

To benefit local trade unions and their members through education and promotion of union labor to the public.

—
4
American Federation of Labor & Congress of Industrial Orgs

To organize all workers for the economic, moral and social advancement of their condition and status.

—
5
American Federation of Labor&Congress of Industrial Orgs Napa&Solano

Labor organization

—
6
American Federation of Teachers Cuesta College Federation Local 4909

Collective Bargaining Representation

—
7
Afl-Cio Snohomish & Island County Labor Council

Member, affiliate, and community education for worker's issues - union and non-union

—
8
California State Council of Service Employees

The council coordinated the efforts of affiliated local unions and assisted their organizations work, bettering the working conditions of their members.

—
9
San Diego and Imperial Counties Labor Council Afl-Cio

The Labor Council offers an avenue for local unions to come together as one group.

—
10
The Laborers Pacific Southwest Regional Organizing Coalition

to organize workers in the laborers international union of north America, afl-cio pacific southwest region through a coordinated program to maintain and improve employment opportunities for affiliated local union members and to recruit new…

Employment
11
American Federation of Labor & Bldg & Construction Trades Council

To create a better working environment for the construction industry and its members.

—
12
California Chamber of Commerce

Represent members and cal employers to members of cal legislature and other agencies of state government through in-house legislative analysts, lobbying staff, and contract lobbyists. cal chamber publishes books and software related to…

—
How this is measured
The grantee most central to the portfolio’s shape is Contra Costa Building and Construction Trades Council; the most unlike its peers is Mesothelioma Research Foundation of America. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
04the grantee network

9 grantees tracked through their own filings, 2017–2025.

Each grant beside the grantee’s revenue from every source, year by year.

How this is measured

Counted here: distinct organizations funded across 2017 to 2025, not grant rows in a single year, so this will not match the grant count on the cover. 9 of the 15 grantees resolved in that span have returns of their own we could reconcile.

Each grantee is resolved to its own IRS returns. Association, dated; never a causal claim.

0
Load-bearing (≥25% of a budget)
2
Early backer (in before they grew)
8/9
Grantees still filing
5/9
Grew since first funded

Where the money sits, by cause and then by grantee

CONTRA COSTA LABOR COUNCIL AFL-CIO: $22,000 · OtherCONTRA COSTA LABOR COUNCIL AFL-CIOINT'L ASSOC OF HEAT AND FROST INSULATORS PAC FUND: $20,123 · OtherINT'L ASSOC OF HEAT AND FROST INSULATORS PAC FUNDCONTRA COSTA BUILDING AND CONSTRUCTION TRADES COUNCIL: $17,500 · OtherCONTRA COSTA BUILDING AND CONSTRUCTION TRADES COUNCILCOMMITTEE TO ELECT STEVE SISOLAK: $10,000 · OtherCOMMITTEE TO ELECT STEVE SISOLAKHEAT AND FROST INSULATORS AND ALLIED WORKERS LOCAL: $8,100 · OtherHEAT AND FROST INSULATORS AND ALLIED WORKERS LOCALSBCTC ISSUES ACCOUNT: $8,000 · OtherSBCTC ISSUES ACCOUNTNAPA-SOLANO BLDG TRADES COUNCIL: $7,500 · OtherNAPA-SOLANO BLDG TRADES COUNCILAmerican Federation of Labor: $7,500 · OtherAmerican Federation of LaborCoalition to Protect Riders and Drivers sponsored by the CA Labor Federation AFL-CIO: $7,000 · OtherCoalition to Protect Riders and Drivers sponsored by the CA Labor Feder…SACRAMENTO SIERRA CONSTRUCTION INDUSTRY LABOR MGT COOPERATION TR: $7,000 · OtherSACRAMENTO SIERRA CONSTRUCTION INDUSTRY LABOR MGT COOPERATION TRBUILDING AND CONSTRUCTION TRADES COUNCIL OF ALAMEDA COUNTY: $6,500 · OtherBUILDING AND CONSTRUCTION TRADES COUNCIL OF ALAMEDA COUNTYMESOTHELIOMA RESEARCH FOUNDATION OF AMERICA: $48,695 · HealthMESOTHELIOMA RESEARCH FOUNDATION OF AM…A Cure in Sight: $10,000 · HealthA Cure in SightSHOOT FOR A CURE: $6,000 · HealthSHOOT FOR A CURESFR COMMUNITY FUND INC: $5,200 · Human Services
Other$121,223Health$64,695Human Services$5,200

Each grantee by its size and the funder’s share of it; top left is load-bearing

25%50%75%100%$1.0M$10Mgrantee revenue →↑ funder's share of their budgetMESOTHELIOMA RESEARCH FOUNDATION OF AMERICA: $48,695 over 6y, 3.0% of budgetCONTRA COSTA LABOR COUNCIL AFL-CIO: $22,000 over 3y, 1.2% of budgetCONTRA COSTA BUILDING AND CONSTRUCTION TRADES COUNCIL: $17,500 over 2y, 1.7% of budgetAmerican Federation of Labor: $7,500 over 1y, 0.8% of budgetCoalition to Protect Riders and Drivers sponsored by the CA Labor Federation AFL-CIO: $7,000 over 1y, 0.0% of budgetBUILDING AND CONSTRUCTION TRADES COUNCIL OF ALAMEDA COUNTY: $6,500 over 1y, 0.9% of budgetSHOOT FOR A CURE: $6,000 over 1y, 0.5% of budgetSFR COMMUNITY FUND INC: $5,200 over 1y, 2.1% of budget
Grantee by grantee: a decade per organization, before and after funding

A decade per grantee: revenue shaded, grants as bars, all rows on one timeline.

Co-funders

Grantmakers whose grantees overlap with this funder’s far more than size alone predicts. Closer means stronger alignment; arcs show where they also fund each other. Here they form a set of overlaps that mostly run through this funder rather than between each other.

United Assoc of Journeymen & PPF 342CA15.7× affinity5 shared granteesties to 0 of 0Hover any node to trace its alignments.Compare side by side →

Open a dossier: United Assoc of Journeymen & PPF 342

How this is measured
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. Overlap is association, not proof of shared intent.

How much its grantees rely on government

Each dot is one organization Heat and Frost Insulators and Allied Workers Local Union No 16 funds: left to right is the share of its income from government, bottom to top the share from Heat and Frost Insulators and Allied Workers Local Union No 16. Bigger dots raise more.

2024
’20’21’22’23’24
no gov · 00%0%1%3%5%funder's share of their income ↑0%1%3%4%5%share of the org’s income from government →
    no gov moneyreceives it· size = income
    0get no government money at all
    0rely on government for over half their income
    ⤢ axis zoomed · 0–5%
    typical government reliance, FY20–24
    How this is measured
    Government income is each org’s traced federal awards (USASpending grants and contracts) plus state payments (open checkbooks) as a share of its total revenue (IRS Form 990); the self-reported government-grant line (990 line 1e) is carried for cross-check: a grantee that reports government grants we could not trace to a source is left off the chart rather than shown as receiving none. An association, not a claim that a grant caused the public funding. Coverage is precision-first, a floor rather than a census; state records exist for 9 states, so a grantee outside them shows no state figure (dimmed) rather than a false zero. Federal award amounts are obligations, which can span years, so a single-year share is indicative. 990 filings lag 12 to 24 months.
    05Through Plinth

    Warm introductions · Powered by PlinthPlus

    How do I get to Heat and Frost Insulators and Allied Workers Local Union No 16?

    Find your warmest path to Heat and Frost Insulators and Allied Workers Local Union No 16 through trustees and officers whose names appear on both boards. Search for your organization and Plinth traces the shortest route it can evidence.

    Each link is a name appearing on two organizations’ public IRS 990 filings, matched on that name and, where the filings support it, on location. A same-state match has geographic support, which is a second matching feature rather than confirmation that the two are one person; a cross-state one is the likeliest to be two people who share a name. Every hop shows its tier, low-confidence and distant paths are held back rather than guessed, and it is worth confirming the person before you use the introduction.

    On method. Every financial figure here is read from IRS e-file XML, the funder’s own 990/990-PF, and from the multi-year returns of the 15 grantees we resolved, each linked to its source. Grantee outcomes are each organization’s own program-service reporting (Form 990, Part III), read as association with funding, never as caused by it. Low-confidence name matches are suppressed rather than guessed. How we build these →

    How this is measured
    Each figure carries one of six labels. Filed is what the funder reported on its return. Official is another government record about an organization, such as a federal award or a charity register, joined by name where no shared identifier exists. Resolved is an identity we worked out where the filing named a recipient without an EIN, kept only above a measured confidence threshold. Computed is arithmetic over those, like themes, portfolio clusters and co-funder strength. Context is a statistic about a place rather than about an organization, which is what the need overlay is: it describes the area a grantee’s address sits in, not where its work lands. Inferred is drawn by a model from text, like the partnerships read out of public news and organization websites. Each is labeled where it appears.

    Generated from the IRS Form 990 e-file return for fiscal year 2025, released 2025. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

    Source object · view filing

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