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Society For Light Treatment And Biological Rhythms

  • Woodbridge, CT
  • Tax-exempt since April 1994
  • EIN: 13-3508970

Organization summary

Type of Nonprofit

Designated as a Organizations for any of the following purposes: religious, educational, charitable, scientific, literary, testing for public safety, fostering national or international amateur sports competition (as long as it doesn't provide athletic facilities or equipment), or the prevention of cruelty to children or animals.

Donations to this organization are tax deductible.

Summary charts: organization finances over time

Revenue
$64k (2023)

Expenses
$74.3k (2023)

Total Assets
$9.62k (2023)

Total Liabilities
$0 (2023)

Source: Form 990 tax filings from 2011 to 2023

Tax Filings by Year

Form 990 is an information return that most organizations claiming federal tax-exempt status must file yearly with the IRS. Nonprofit Explorer has IRS digitized Form 990 data for filings processed in 2012 and later. If this organization filed an amended return, it may not be reflected below. Duplicate download links may indicate a resubmission or amendment to this organization's original return. Form 990 data is from the IRS.

Fiscal Year Ending Dec.
2023

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$63,950
Expenses
$74,337
Net Income
-$10,387
Net Assets
$9,619
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $0
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $53,110
83.0%
Assets/Debt
Total Assets $9,619
Total Liabilities $0
Net Assets $9,619
Compensation
Key Employees and Officers Compensation Other
Christian Cajochen Phd (President) $0 $0
Marijke Gordijn Md (Board Member) $0 $0
Corrado Garbazza Md (Vice President) $0 $0
Renske Lok Phd (Board Member) $0 $0
Louise Ince Phd (Board Member) $0 $0
Lisa M Wu Phd (Board Member) $0 $0
Aleks Videnovic Md (Board Member) $0 $0
Annick Goijarts (Administrative Manager) $0 $0
John Hanifin Phd (Treasurer) $0 $0
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Document Links

990-EZ
Filed on Sept. 10, 2024

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
XML

Fiscal Year Ending Dec.
2022

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$48,951
Expenses
$45,812
Net Income
$3,139
Net Assets
$20,006
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $0
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $42,631
87.1%
Assets/Debt
Total Assets $20,006
Total Liabilities $0
Net Assets $20,006
Compensation
Key Employees and Officers Compensation Other
Dorothy Sit Md (Past President, Board Memb) $0 $0
Mirjam Munchphd (Past President, Board Memb) $0 $0
Marijke Gordijn Md (President) $0 $0
John Gottlieb Md (Board Member) $0 $0
Christian Cajochen Phd (Vice President) $0 $0
Katharina Wulff Phd (Board Member) $0 $0
Renske Lok Phd (Board Member) $0 $0
Annick Goijarts (Administrative Manager) $0 $0
John Hanifin Phd (Treasurer) $0 $0
Corrado Garbazza Md (Board Member) $0 $0
+ View more people

Document Links

990-EZ
Filed on July 11, 2023

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2021

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$14,557
Expenses
$19,699
Net Income
-$5,142
Net Assets
$16,867
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $0
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $9,382
64.5%
Assets/Debt
Total Assets $16,867
Total Liabilities $0
Net Assets $16,867
Compensation
Key Employees and Officers Compensation Other
Dorothy Sit Md (Past President, Board Memb) $0 $0
Mirjam Munchphd (Past President, Board Memb) $0 $0
Marijke Gordijn Md (President) $0 $0
John Gottlieb Md (Board Member) $0 $0
Christian Cajochen Phd (Vice President) $0 $0
Katharina Wulff Phd (Board Member) $0 $0
Renske Lok Phd (Board Member) $0 $0
Annick Goijarts (Administrative Manager) $0 $0
John Hanifin Phd (Treasurer) $0 $0
Corrado Garbazza Md (Board Member) $0 $0
+ View more people

Document Links

990-EZ
Filed on July 8, 2022

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
XML

Fiscal Year Ending Dec.
2020

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$6,809
Expenses
$6,338
Net Income
$471
Net Assets
$22,009
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $0
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $22,009
Total Liabilities $0
Net Assets $22,009
Compensation
Key Employees and Officers Compensation Other
Dorothy Sit Md (Past President, Board Memb) $0 $0
Mirjam Munchphd (Past President, Board Memb) $0 $0
Marijke Gordijn Md (President) $0 $0
John Gottlieb Md (Board Member) $0 $0
Christian Cajochen Phd (Vice President) $0 $0
Katharina Wulff Phd (Board Member) $0 $0
Renske Lok Phd (Board Member) $0 $0
Nikki Hafezi (Administrative Manager) $0 $0
John Hanifin Phd (Treasurer) $0 $0
Corrado Garbazza Md (Board Member) $0 $0
+ View more people

Document Links

990-EZ
Filed on July 20, 2021

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2019

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$46,428
Expenses
$40,244
Net Income
$6,184
Net Assets
$21,538
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $5,240
11.3%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $19,941
43.0%
Assets/Debt
Total Assets $21,538
Total Liabilities $0
Net Assets $21,538
Compensation
Key Employees and Officers Compensation Other
Dorothy Sit Md (President) $0 $0
Mirjam Munchphd (Past President, Borad Memb) $0 $0
Marijke Grodijn (Vice President) $0 $0
John Gottlieb (Board Member) $0 $0
Christian Cajochen Phd (Board Member) $0 $0
Katharina Wulff Phd (Board Member) $0 $0
Renske Lok (Board Member) $0 $0
Nikki Hafezi (Administrative Manager) $0 $0
John Hanifin (Treasurer) $0 $0
+ View more people

Document Links

990-EZ
Filed on March 15, 2020

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2018

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$40,409
Expenses
$36,810
Net Income
$3,599
Net Assets
$15,354
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $9,293
23.0%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $19,158
47.4%
Assets/Debt
Total Assets $15,354
Total Liabilities $0
Net Assets $15,354
Compensation
Key Employees and Officers Compensation Other
Dorothy Sit Md (President) $0 $0
Mirjam Munchphd (Past President, Borad Member) $0 $0
Marijke Grodijn (Vice President) $0 $0
John Gottlieb (Board Member) $0 $0
Christian Cajochen Phd (Board Member) $0 $0
Katharina Wulff Phd (Board Member) $0 $0
Renske Lok (Board Member) $0 $0
Nikki Hafezi (Administrative Manager) $0 $0
John Hanifin (Treasurer) $0 $0
+ View more people

Document Links

990-EZ
Filed on April 15, 2019

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2017

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$33,508
Expenses
$36,750
Net Income
-$3,242
Net Assets
$11,755
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $5,885
17.6%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $14,353
42.8%
Assets/Debt
Total Assets $11,755
Total Liabilities $0
Net Assets $11,755
Compensation
Key Employees and Officers Compensation Other
Mirjam Munchphd (President) $0 $0
Klaus Martiny Md Phd (Immediate Past President) $0 $0
Dorothy Sit Md (Vice President) $0 $0
John Hanifin (Treasurer) $0 $0
Konstantin Danilenko Md (Board Member) $0 $0
Ybe Meesters Phd (Board Member) $0 $0
Kathryn Roecklein Phd (Board Member) $0 $0
Nikki Hafezi (Administrative Manager) $0 $0
+ View more people

Document Links

990-EZ
Filed on Feb. 2, 2018

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2016

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$53,427
Expenses
$54,653
Net Income
-$1,226
Net Assets
$14,997
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $13,279
24.9%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $4,980
9.3%
Assets/Debt
Total Assets $14,997
Total Liabilities $0
Net Assets $14,997
Compensation
Key Employees and Officers Compensation Other
Mirjam Munch Phd (President) $0 $0
Klaus Martiny Phd (Immediate Past President) $0 $0
Matthaeus Willeit Md (Immediate Past President) $0 $0
Dorothy Sit Md (Vice President) $0 $0
John Hanifin (Treasurer) $0 $0
Konstantin Danilenko Md (Board Member) $0 $0
Ybe Meesters Phd (Board Member) $0 $0
Kathryn Roecklein Phd (Board Member) $0 $0
Nikki Hafezi (Administrative Manager) $0 $0
+ View more people

Document Links

990-EZ
Filed on Feb. 10, 2017

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2015

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$36,774
Expenses
$46,528
Net Income
-$9,754
Net Assets
$16,223
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $14,267
38.8%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $15,175
41.3%
Assets/Debt
Total Assets $16,223
Total Liabilities $0
Net Assets $16,223
Compensation
Key Employees and Officers Compensation Other
Klaus Martiny Md Phd (President) $0 $0
Matthaeus Willeit Md (Immediate Past President) $0 $0
John Hanifin (Treasurer) $0 $0
Dorothy Sit Md (Membership Director) $0 $0
Konstantin Danilenko Md (Board Of Directors) $0 $0
Ybe Meesters Phd (Board Of Directors) $0 $0
Mirjam Munch Phd (Board Of Directors) $0 $0
Kathryn Roecklein Phd (Board Of Directors) $0 $0
Nikki L Hafezi (Administrative Manager) $0 $0
+ View more people

Document Links

990-EZ
Filed on June 20, 2016

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2014

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$59,731
Expenses
$40,008
Net Income
$19,723
Net Assets
$25,976
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $6,500
10.9%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $40,830
68.4%
Assets/Debt
Total Assets $25,976
Total Liabilities $0
Net Assets $25,976
Compensation
Key Employees and Officers Compensation Other
Klaus Martiny Md Phd (President) $0 $0
Matthaeus Willeit Md (Immediate Past President) $0 $0
John Hanifin (Treasurer) $0 $0
Dorothy Sit Md (Membership Director) $0 $0
Konstantin Danilenko Md (Board Of Directors) $0 $0
Ybe Meesters Phd (Board Of Directors) $0 $0
Mirjam Munch Phd (Board Of Directors) $0 $0
Kathryn Roecklein Phd (Board Of Directors) $0 $0
Nikki L Hafezi (Administrative Manager) $0 $0
+ View more people

Document Links

990-EZ
Filed on July 10, 2015

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2013

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$46,905
Expenses
$70,530
Net Income
-$23,625
Net Assets
$6,253
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $1,178
2.5%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $29,557
63.0%
Assets/Debt
Total Assets $6,253
Total Liabilities $0
Net Assets $6,253
Compensation
Key Employees and Officers Compensation Other
Matthaeus Willeit Md (President) $0 $0
Marc Hebert Phd (Immediate Past President) $0 $0
John Hanifin (Treasurer) $0 $0
Shawn Youngstedt Phd (Membership Director) $0 $0
Konstantin Danilenko Md (Board Of Directors) $0 $0
Klaus Martiny Md Phd (Board Of Directors) $0 $0
Dieter Kunz Md (Board Of Directors) $0 $0
Ybe Meesters Phd (Board Of Directors) $0 $0
Mirjam Munch Phd (Board Of Directors) $0 $0
Kathryn Roecklein Phd (Board Of Directors) $0 $0
Nikki L Hafezi (Administrative Manager) $0 $0
Dorothy Sit Md (Board Of Directors) $0 $0
+ View more people

Document Links

990-EZ
Filed on June 19, 2014

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2012

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$39,091
Expenses
$37,165
Net Income
$1,926
Net Assets
$29,878
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $19,246
49.2%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $9,990
25.6%
Assets/Debt
Total Assets $29,878
Total Liabilities $0
Net Assets $29,878

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2011

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$32,845
Expenses
$42,270
Net Income
-$9,425
Net Assets
$27,952
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $15,155
46.1%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $9,990
30.4%
Assets/Debt
Total Assets $27,952
Total Liabilities $0
Net Assets $27,952

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2010

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2009

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2008

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2007

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2006

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2005

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2004

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2003

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2002

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2001

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

About This Data

Nonprofit Explorer includes summary data for nonprofit tax returns and full Form 990 documents, in both PDF and digital formats.

The summary data contains information processed by the IRS during the 2012-2019 calendar years; this generally consists of filings for the 2011-2018 fiscal years, but may include older records. This data release includes only a subset of what can be found in the full Form 990s.

In addition to the raw summary data, we link to PDFs and digital copies of full Form 990 documents wherever possible. This consists of separate releases by the IRS of Form 990 documents processed by the agency, which we update regularly.

We also link to copies of audits nonprofit organizations that spent $750,000 or more in Federal grant money in a single fiscal year since 2016. These audits are copied from the Federal Audit Clearinghouse.

Which Organizations Are Here?

Every organization that has been recognized as tax exempt by the IRS has to file Form 990 every year, unless they make less than $200,000 in revenue and have less than $500,000 in assets, in which case they have to file form 990-EZ. Organizations making less than $50,000 don’t have to file either form but do have to let the IRS they’re still in business via a Form 990N "e-Postcard."

Nonprofit Explorer has organizations claiming tax exemption in each of the 27 subsections of the 501(c) section of the tax code, and which have filed a Form 990, Form 990EZ or Form 990PF. Taxable trusts and private foundations that are required to file a form 990PF are also included. Small organizations filing a Form 990N "e-Postcard" are not included in this data.

Types of Nonprofits

There are 27 nonprofit designations based on the numbered subsections of section 501(c) of the tax code. See the list »

Get the Data

For those interested in acquiring the original data from the source, here’s where our data comes from:

  • Raw filing data. Includes EINs and summary financials as structured data.
  • Exempt Organization profiles. Includes organization names, addresses, etc. You can merge this with the raw filing data using EIN numbers.
  • Form 990 documents. Prior to 2017, these documents were obtained and processed by Public.Resource.org and ProPublica. Bulk PDF downloads since 2017 are available from the IRS.
  • Form 990 documents as XML files. Includes complete filing data (financial details, names of officers, tax schedules, etc.) in machine-readable format. Only available for electronically filed documents. Electronic data released prior to October 2021 is also available through Amazon Web Services.
  • Audits. PDFs of single or program-specific audits for nonprofit organizations that spent $750,000 or more in Federal grant money in a single fiscal year. Available for fiscal year 2015 and later.

API

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Byline

By Andrea Suozzo, Alec Glassford and Ash Ngu, ProPublica, and Brandon Roberts, Special to ProPublica.
Design by Jeff Frankl. Additional development by Ken Schwencke, Mike Tigas, and Sisi Wei.

E-file viewer adapted from IRS e-File Viewer by Ben Getson. Code for scraping audit documents adapated from Govwiki.

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