Unknown & Unclassified nonprofits

Unknown & Unclassified nonprofits. Browse 557,756 public nonprofit profiles. Review organization identities, available filing years, and their complete CharitySense profiles.

Location refers to headquarters recorded in public sources, not an organization’s service area. Classification describes its reported category and does not assess its effectiveness.

Nonprofit profiles

  1. Sigma Sigma Phi

    EIN 301195362 · Headquarters: Fort Smith, AR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  2. Sigma Sigma Phi

    EIN 311004352 · Headquarters: Fort Worth, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  3. Sigma Sigma Phi

    EIN 311079538 · Headquarters: Lewisburg, WV, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. Sigma Sigma Phi

    EIN 366110024 · Headquarters: Downers Grove, IL, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  5. Sigma Sigma Phi

    EIN 436049994 · Headquarters: KIRKSVILLE, MO, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. Sigma Sigma Phi

    EIN 453088092 · Headquarters: Englewood, CO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  7. Sigma Sigma Phi

    EIN 455257728 · Headquarters: Mesa, AZ, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  8. Sigma Sigma Phi

    EIN 473677282 · Headquarters: Indianapolis, IN, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  9. Sigma Sigma Phi

    EIN 823352726 · Headquarters: Stratford, NJ, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  10. Sigma Sigma Phi

    EIN 830507899 · Headquarters: Philadelphia, PA, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  11. Sigma Sigma Sigma

    EIN 465047025 · Headquarters: Huntington Station, NY, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  12. Sigma Sigma Sigma

    EIN 843935667 · Headquarters: Tampa, FL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  13. Sigma Sigma Sigma Alumni Assoc

    EIN 921729717 · Headquarters: Lafayette, LA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  14. Sigma Sigma Sigma Bldg Corp of DeKalb

    EIN 362500819 · Headquarters: DeKalb, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  15. Sigma Sigma Sigma Durham-chapel Hill Alumnae House Corporation

    EIN 560944777 · Headquarters: WOODSTOCK, VA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  16. Sigma Sigma Sigma Foundation

    EIN 521370798 · Headquarters: CHAPEL HILL, NC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  17. Sigma Sigma Sigma Inc

    EIN 270958749 · Headquarters: Atlanta, GA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  18. Sigma Sigma Sigma Inc

    EIN 271475299 · Headquarters: Longwood, FL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  19. Sigma Sigma Sigma Inc

    EIN 273653056 · Headquarters: Arlington, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. Sigma Sigma Sigma Inc

    EIN 273656450 · Headquarters: Phoenix, AZ, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  21. Sigma Sigma Sigma Inc

    EIN 273715279 · Headquarters: Baton Rouge, LA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  22. Sigma Sigma Sigma Inc

    EIN 273791581 · Headquarters: Golden, CO, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  23. Sigma Sigma Sigma Inc

    EIN 273807974 · Headquarters: San Diego, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  24. Sigma Sigma Sigma Inc

    EIN 273860565 · Headquarters: Brick Township, NJ, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  25. Sigma Sigma Sigma Inc

    EIN 273869371 · Headquarters: SARASOTA, FL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  26. Sigma Sigma Sigma Inc

    EIN 273880599 · Headquarters: Elm City, NC, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  27. Sigma Sigma Sigma Inc

    EIN 273956185 · Headquarters: San Jose, CA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  28. Sigma Sigma Sigma Inc

    EIN 273975405 · Headquarters: Anchorage, AK, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  29. Sigma Sigma Sigma Inc

    EIN 274024144 · Headquarters: Mount Pleasant, MI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  30. Sigma Sigma Sigma Inc

    EIN 320398364 · Headquarters: Jackonsville, FL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  31. Sigma Sigma Sigma Inc

    EIN 320422201 · Headquarters: South Pasadena, FL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  32. Sigma Sigma Sigma Inc

    EIN 352496412 · Headquarters: Rogers, AR, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  33. Sigma Sigma Sigma Inc

    EIN 370698327 · Headquarters: MACOMB, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  34. Sigma Sigma Sigma Inc

    EIN 411651439 · Headquarters: Minnetonka, MN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  35. Sigma Sigma Sigma Inc

    EIN 431784404 · Headquarters: Lenexa, KS, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  36. Sigma Sigma Sigma Inc

    EIN 436065819 · Headquarters: Pickering, MO, US · Unknown & Unclassified · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  37. Sigma Sigma Sigma Inc

    EIN 452418004 · Headquarters: Wilmington, DE, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. Sigma Sigma Sigma Inc

    EIN 453370843 · Headquarters: Drexel Hill, PA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  39. Sigma Sigma Sigma Inc

    EIN 453789941 · Headquarters: Palatine, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  40. Sigma Sigma Sigma Inc

    EIN 453793450 · Headquarters: Slippery Rock, PA, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  41. Sigma Sigma Sigma Inc

    EIN 453804043 · Headquarters: Worcester, MA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  42. Sigma Sigma Sigma Inc

    EIN 454545862 · Headquarters: Fort Wayne, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  43. Sigma Sigma Sigma Inc

    EIN 454637969 · Headquarters: Vernon Hills, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  44. Sigma Sigma Sigma Inc

    EIN 454665957 · Headquarters: Mount Joy, PA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  45. Sigma Sigma Sigma Inc

    EIN 455392037 · Headquarters: Las Vegas, NV, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  46. Sigma Sigma Sigma Inc

    EIN 462068106 · Headquarters: Mountlake Terrace, WA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  47. Sigma Sigma Sigma Inc

    EIN 462617170 · Headquarters: WICHITA, KS, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  48. Sigma Sigma Sigma Inc

    EIN 463903024 · Headquarters: Greenville, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  49. Sigma Sigma Sigma Inc

    EIN 464029372 · Headquarters: Indianapolis, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  50. Sigma Sigma Sigma Inc

    EIN 464056589 · Headquarters: Grandville, MI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  51. Sigma Sigma Sigma Inc

    EIN 464071202 · Headquarters: Metairie, LA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  52. Sigma Sigma Sigma Inc

    EIN 464282819 · Headquarters: Woodstock, VA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  53. Sigma Sigma Sigma Inc

    EIN 464875323 · Headquarters: St Louis, MO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  54. Sigma Sigma Sigma Inc

    EIN 464955974 · Headquarters: Belvidere, IL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  55. Sigma Sigma Sigma Inc

    EIN 472279284 · Headquarters: Woodstock, VA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  56. Sigma Sigma Sigma Inc

    EIN 473397022 · Headquarters: Arlington, VA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  57. Sigma Sigma Sigma Inc

    EIN 474190476 · Headquarters: Naugatuck, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  58. Sigma Sigma Sigma Inc

    EIN 474756049 · Headquarters: Daniels, WV, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Sigma Sigma Sigma Inc

    EIN 475510405 · Headquarters: New Berlin, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Sigma Sigma Sigma Inc

    EIN 480679204 · Headquarters: Pittsburg, KS, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  61. Sigma Sigma Sigma Inc

    EIN 521795483 · Headquarters: Sparta, NJ, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  62. Sigma Sigma Sigma Inc

    EIN 593508952 · Headquarters: DeLand, FL, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  63. Sigma Sigma Sigma Inc

    EIN 731094186 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  64. Sigma Sigma Sigma Inc

    EIN 731364481 · Headquarters: Edmond, OK, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  65. Sigma Sigma Sigma Inc

    EIN 742634969 · Headquarters: Thibodaux, LA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  66. Sigma Sigma Sigma Inc

    EIN 800481666 · Headquarters: Tallahassee, FL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  67. Sigma Sigma Sigma Inc

    EIN 800837656 · Headquarters: Guytong, GA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  68. Sigma Sigma Sigma Inc

    EIN 800958961 · Headquarters: HENDERSONVILLE, TN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  69. Sigma Sigma Sigma Inc

    EIN 813857325 · Headquarters: Houston, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  70. Sigma Sigma Sigma Inc

    EIN 821612599 · Headquarters: Mechanicsville, VA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  71. Sigma Sigma Sigma Inc

    EIN 823192294 · Headquarters: Tucson, AZ, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  72. Sigma Sigma Sigma Inc

    EIN 823305475 · Headquarters: WIXOM, MI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  73. Sigma Sigma Sigma Inc

    EIN 823317727 · Headquarters: Stow, OH, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  74. Sigma Sigma Sigma Inc

    EIN 823384531 · Headquarters: Madisionville, LA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  75. Sigma Sigma Sigma Inc

    EIN 825044256 · Headquarters: Los Angeles, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. Sigma Sigma Sigma Inc

    EIN 832062532 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  77. Sigma Sigma Sigma Inc

    EIN 842490694 · Headquarters: Conway, SC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  78. Sigma Sigma Sigma Inc

    EIN 842922542 · Headquarters: Huntington Woods, MI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  79. Sigma Sigma Sigma Inc

    EIN 844772013 · Headquarters: Pittsburg, KS, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  80. Sigma Sigma Sigma Inc

    EIN 884288373 · Headquarters: McCalla, AL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  81. Sigma Sigma Sigma Inc

    EIN 921488707 · Headquarters: Colorado Springs, CO, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  82. Sigma Sigma Sigma Inc

    EIN 953245878 · Headquarters: Downey, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  83. Sigma Sigma Sigma Inc Group Return

    EIN 521391397 · Headquarters: CHAPEL HILL, NC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  84. Sigma Sigma Sigma Inc Psi Chapter

    EIN 550358890 · Headquarters: HUNTINGTON, WV, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  85. Sigma Sigma Sigma Inc Sacramento Alumni Assoc of Sigma Si

    EIN 320478061 · Headquarters: PLEASANT GROVE, CA, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  86. Sigma Sigma Sigma Inc Southwest Florida Alumnae Chapter

    EIN 812982728 · Headquarters: FORT MYERS, FL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  87. Sigma Sigma Sigma Incorporated

    EIN 730654150 · Headquarters: CHAPEL HILL, NC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  88. Sigma Sigma Sigma Madison Area Alumnae Chapter

    EIN 264593474 · Headquarters: Janesville, WI, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  89. Sigma Sigma Sigma Pi Chapter

    EIN 480417763 · Headquarters: EMPORIA, KS, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  90. Sigma Tau Association C/o James W McCurdy

    EIN 916033189 · Headquarters: Shoreline, WA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  91. Sigma Tau Delta - Ung-dahlonega Chapter

    EIN 383813208 · Headquarters: Dahlonega, GA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  92. Sigma Tau Delta Robert Morris University Alpha Sigma Lambda Chap

    EIN 455214667 · Headquarters: Moon Township, PA, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  93. Sigma Tau Delta Society Inc

    EIN 363397304 · Headquarters: DEKALB, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  94. Sigma Tau Educational Foundation

    EIN 911569892 · Headquarters: WOODINVILLE, WA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  95. Sigma Tau Gamma

    EIN 251359573 · Headquarters: Carmel, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  96. Sigma Tau Gamma - Eta Mu Chapter

    EIN 834705096 · Headquarters: Lawrence, KS, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  97. Sigma Tau Gamma Delta Phi Alumni Association Incorporated

    EIN 462699182 · Headquarters: Buzzards Bay, MA, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  98. Sigma Tau Gamma Eta Lambda

    EIN 833166425 · Headquarters: COLLEGE PARK, MD, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  99. Sigma Tau Gamma Fraternity

    EIN 363373534 · Headquarters: Indianapolis, IN, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  100. Sigma Tau Gamma Fraternity

    EIN 480417765 · Headquarters: EMPORIA, KS, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

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