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US nonprofit · EIN 472128576 · Gustavus, AKiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 472128576) - NTEE activity code, address.Board and officers IRS Form 990 annual filings, Part VII (directors, trustees, officers, key employees), read year by year to observe tenure.Latest return IRS Form 990 series e-file data - 990 for the year to 31 December 2025: assets, liabilities, staff, website, telephone, pay.Finances by year IRS Form 990 e-file data - total revenue and total expenses by tax year.Renewal outlook Computed by Governance Register from the observed filing history and filed revenue (us-approach-v4-clean). Not a statement that the organisation is recruiting.Deductibility IRS Publication 78 data (code PC), downloaded 18 October 2026.Licence US Federal Government public domain.How we handle data

Tidelines Institute

Donations deductible
Revenue
$967k
year to 31 December 2025
Expenses
$827k
year to 31 December 2025
Total assets
$3.9m
$8k liabilities
Net assets
$3.9m
assets less liabilities
Directors and trustees
9
5.8y av
Staff
12
employees, year to 31 December 2025
Left since last filing
0
no seats appear to have opened
Voting members
9
reported in Part VI
How am I connected?

Tidelines Institute's network

9 peoplei9 people on this map.The large node is the subject of this page. Solid lines are what the register itself records (9). Form 990 filings give names without a person identifier; SEC insider filings carry a CIK.

The board

9 listediTime on the board is observed from the annual filings: the IRS files no appointment date, so the bar counts years from the first filing the person appears on - a lower bound, not a filed start date. Names are exactly as filed. The IRS publishes no person identifier, so this edition does not yet link a person across organisations.Tenure and departures are observed across annual filings. Observed tenure is a lower bound - a member may have joined before the first year on record. The organisation reported 9 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.
NameRole as filedSinceOn the board
Alisa RegassaAlumni Repre2024
2 yrs
Dr Amity WilczekVice Preside2022
4 yrs
Elizabeth HillstromCompany secretary2018
8 yrs
Hank LentferDirector2020
6 yrs
Jerry DzuganDirector2024
2 yrs
Jessica LindmarkPresident2018
8 yrs
Molly KempTreasurer2018
8 yrs
Rebekah ContrerasDirector2022
4 yrs
Shubhra MurarkaDirector2020
6 yrs
Under 5 years5 to 6 years6 years or more

Pay and hours

year to 31 December 2025iFrom Part VII of the Form 990: compensation reported for each officer, director, trustee, key employee and highest-paid staff member, and the average hours a week they report. Most board members are unpaid; a blank means nothing was reported. Pay from related organisations is shown separately.
NameTitle as filedHours a weekPay from the organisationRelated organisationsOther
Jessica LindmarkPresident$0
David NeidorfVice Preside$0
Jerry DzuganTreasurer$0
Shubhra MurarkaSecretary$0
Norman CohenDirector$0
Rebekah ContrerasDirector$0
Sage LoganDirector$0
Utsa SethDirector$0

No pay was reported for anyone in Part VII on this return.

About

Legal name
Tidelines Institute
EIN
472128576
Address
Po Box 100, Gustavus, AK, 99826-0100
State
Alaska
Mission
Tidelines institute is dedicated to the education and inspiration of rising environmental leaders within the phenomenal setting of southeast alaska. (as filed on the Form 990)
Activity (NTEE)
B99 Education
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Education
Size band
6 (IRS master file code)
Formed
2014
Principal officer
Jessica Lindmark (as named on the Form 990)
IRS ruling date
1 February 2015
Status
Code 01 (unconditional exemption)
Form 990 filings on record
7, latest 2024
IRS Publication 78
PC (contributions deductible)

Most connected

Longest observed on the filings

≥8years on the filingsElizabeth Hillstrom
≥8years on the filingsJessica Lindmark
≥8years on the filingsMolly Kemp
≥6years on the filingsHank Lentfer

Latest return

year to 31 December 2025iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 31 December 2025. US dollars, as filed.
Total assets
$3.9m
Total liabilities
$8k
Net assets or fund balances
$3.9m
Contributions and grants received
$725k
Program service revenue
$234k
Employees
12

Filed finances

1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2024$1.2m$762k$482k

As filed on the IRS Form 990. US dollars.