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 Phi Lambda Inc

    EIN 201239559 · Headquarters: Corinth, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  2. Sigma Phi Lambda Inc

    EIN 412212192 · Headquarters: Corinth, TX, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  3. Sigma Phi Lambda Inc

    EIN 450542070 · Headquarters: Corinth, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  4. Sigma Phi Lambda Inc

    EIN 450542071 · Headquarters: Corinth, TX, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  5. Sigma Phi Lambda Inc

    EIN 743124244 · Headquarters: Corinth, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  6. Sigma Phi Lambda Inc

    EIN 743124322 · Headquarters: Denton, TX, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  7. Sigma Phi Lambda Inc

    EIN 861108207 · Headquarters: Denton, TX, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  8. Sigma Phi Lambda Inc

    EIN 943438766 · Headquarters: Corinth, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  9. Sigma Phi Omega National Honor Society

    EIN 431577308 · Headquarters: Ithaca, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. Sigma Phi Omega Sorority Inc

    EIN 843528891 · Headquarters: San Diego, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  11. Sigma Phi Society

    EIN 135392442 · Headquarters: TUCSON, AZ, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  12. Sigma Phi Society at Lehigh University Alumni Corporation

    EIN 455565463 · Headquarters: bethlehem, PA, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  13. Sigma Pi

    EIN 510605475 · Headquarters: Dekalb, IL, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  14. Sigma Pi - Mu Chapter

    EIN 150448140 · Headquarters: ITHACA, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  15. Sigma Pi - Zeta

    EIN 272297794 · Headquarters: Ada, OH, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  16. Sigma Pi Alpha Rho Housing

    EIN 431467882 · Headquarters: SPRINGFIELD, MO, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  17. Sigma Pi Beta Chapter Housing Corp

    EIN 356007517 · Headquarters: BLOOMINGTON, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  18. Sigma Pi Chapter Epsilon Kappa

    EIN 311207357 · Headquarters: Magnolia, AR, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  19. Sigma Pi Chapter House of Purdue University Inc

    EIN 350875510 · Headquarters: Lafayette, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  20. Sigma Pi Chapter Omega Psi Phi Fraternity Inc

    EIN 271244109 · Headquarters: Aiken, SC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  21. Sigma Pi Corporation Of Newark Inc

    EIN 221766389 · Headquarters: NEWARK, NJ, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  22. Sigma Pi Faternity International

    EIN 010951709 · Headquarters: VINCENNES, IN, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. Sigma Pi Fraternity

    EIN 382740821 · Headquarters: SOUTHFIELD, MI, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  24. Sigma Pi Fraternity - Eta Kappa Chapter

    EIN 621468312 · Headquarters: Greenville, NC, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  25. Sigma Pi Fraternity - Theta Omega Chapter

    EIN 205730205 · Headquarters: MURFREESBORO, TN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  26. Sigma Pi Fraternity - Upsilon Chapter

    EIN 951786209 · Headquarters: LOS ANGELES, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  27. Sigma Pi Fraternity Alpha Phi Chapter

    EIN 580679938 · Headquarters: ATHENS, GA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  28. Sigma Pi Fraternity Alpha Sigma Chapter

    EIN 261995515 · Headquarters: FAYETTEVILLE, AR, USA · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990

  29. SIGMA PI FRATERNITY Alpha-Omicron Chapter

    EIN 208374657 · Headquarters: GOLETA, CA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  30. Sigma Pi Fraternity Beta Pi Chapter

    EIN 546063036 · Headquarters: CHARLOTTESVLE, VA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  31. Sigma Pi Fraternity Educational Fund

    EIN 330490547 · Headquarters: SAN DIEGO, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  32. Sigma Pi Fraternity Eta Sigma Chapter

    EIN 472206412 · Headquarters: Fort Collins, CO, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  33. Sigma Pi Fraternity Housing Corporation

    EIN 237359145 · Headquarters: Lexington, KY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  34. Sigma Pi Fraternity International

    EIN 275277235 · Headquarters: HILLIARD, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. Sigma Pi Fraternity International

    EIN 351998321 · Headquarters: LIVINGSTON, AL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. Sigma Pi Fraternity International

    EIN 376063835 · Headquarters: CARBONDALE, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. Sigma Pi Fraternity International

    EIN 396100409 · Headquarters: OSHKOSH, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. Sigma Pi Fraternity International

    EIN 475641826 · Headquarters: ABSECON, NJ, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. Sigma Pi Fraternity International

    EIN 616058074 · Headquarters: MURRAY, KY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. Sigma Pi Fraternity International

    EIN 815169186 · Headquarters: Nashville, TN, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  41. Sigma Pi Fraternity International Beta Chapter

    EIN 350867576 · Headquarters: BLOOMINGTON, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  42. Sigma Pi Fraternity International Gamma-iota Chapter

    EIN 042393466 · Headquarters: WORCESTER, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  43. Sigma Pi Fraternity International Inc

    EIN 203684528 · Headquarters: Williamsport, PA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  44. Sigma Pi Fraternity International Inc

    EIN 205609792 · Headquarters: Castle Hills, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Sigma Pi Fraternity International Inc

    EIN 208014743 · Headquarters: Collegeville, PA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. Sigma Pi Fraternity International Inc

    EIN 221281800 · Headquarters: SMYRNA, TN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  47. Sigma Pi Fraternity International Inc

    EIN 237127773 · Headquarters: Oakhurst, NJ, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  48. Sigma Pi Fraternity International Inc

    EIN 237127775 · Headquarters: Platteville, WI, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  49. Sigma Pi Fraternity International Inc

    EIN 237127780 · Headquarters: Lexington, KY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  50. Sigma Pi Fraternity International Inc

    EIN 251820227 · Headquarters: Indiana, PA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  51. Sigma Pi Fraternity International Inc

    EIN 270419566 · Headquarters: Lexington, KY, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  52. Sigma Pi Fraternity International Inc

    EIN 311033920 · Headquarters: Jonesboro, AR, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  53. Sigma Pi Fraternity International Inc

    EIN 311207395 · Headquarters: Glassboro, NJ, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  54. Sigma Pi Fraternity International Inc

    EIN 356067853 · Headquarters: Valparaiso, IN, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. Sigma Pi Fraternity International Inc

    EIN 382371298 · Headquarters: Detroit, MI, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  56. Sigma Pi Fraternity International Inc

    EIN 382740811 · Headquarters: Houghton, MI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. Sigma Pi Fraternity International Inc

    EIN 382740823 · Headquarters: Rochester Hills, MI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  58. Sigma Pi Fraternity International Inc

    EIN 431273298 · Headquarters: Springfield, MO, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Sigma Pi Fraternity International Inc

    EIN 436069542 · Headquarters: All, MO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  60. Sigma Pi Fraternity International Inc

    EIN 436069543 · Headquarters: Warrensburg, MO, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  61. Sigma Pi Fraternity International Inc

    EIN 450489767 · Headquarters: Houston, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. Sigma Pi Fraternity International Inc

    EIN 451355579 · Headquarters: Jonesboro, AR, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  63. Sigma Pi Fraternity International Inc

    EIN 465303141 · Headquarters: Queens, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  64. Sigma Pi Fraternity International Inc

    EIN 474983478 · Headquarters: San Clemente, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  65. Sigma Pi Fraternity International Inc

    EIN 510253317 · Headquarters: VINCENNES, IN, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  66. Sigma Pi Fraternity International Inc

    EIN 510253319 · Headquarters: Lexington, KY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  67. Sigma Pi Fraternity International Inc

    EIN 560564520 · Headquarters: Raleigh, NC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. Sigma Pi Fraternity International Inc

    EIN 581400692 · Headquarters: WINSTON SALEM, NC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. Sigma Pi Fraternity International Inc

    EIN 611120060 · Headquarters: Lexington, KY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  70. Sigma Pi Fraternity International Inc

    EIN 800358763 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  71. Sigma Pi Fraternity International Inc

    EIN 813931828 · Headquarters: Morehead City, NC, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  72. Sigma Pi Fraternity International Inc

    EIN 912095302 · Headquarters: Norfolk, VA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. Sigma Pi Fraternity International Inc Alpha Iota Chapter

    EIN 430616725 · Headquarters: Rolla, MO, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  74. Sigma Pi Fraternity International Inc Omega Chapter

    EIN 930241124 · Headquarters: PENDLETON, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  75. Sigma Pi Fraternity Interntional

    EIN 820902870 · Headquarters: ADA, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. Sigma Pi Fraternity Intl Mu Chapter Cornell Alumni Association Inc

    EIN 334194603 · Headquarters: ITHACA, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. Sigma Pi Fraternity Theta Chapter

    EIN 240798435 · Headquarters: STATE COLLEGE, PA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  78. Sigma Pi Fraternity Theta Rho Chapter

    EIN 900120575 · Headquarters: TUSCALOOSA, AL, USA · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990

  79. Sigma Pi Fraternity Zeta Eta Chaper

    EIN 311207375 · Headquarters: Santa Clara, CA, USA · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-EZ

  80. Sigma Pi Fraternity-intl Beta Gamma Chp

    EIN 376063836 · Headquarters: SPRINGFIELD, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  81. Sigma Pi Housing Management Corporation of the Delta Zeta Chap

    EIN 300593106 · Headquarters: Bel Ridge, MO, US · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  82. Sigma Pi Iota Chapter

    EIN 941166470 · Headquarters: MORAGA, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  83. Sigma Pi Phi (Iota Boule) Educational Foundation

    EIN 382661313 · Headquarters: BINGHAM FARMS, MI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  84. Sigma Pi Zeta Chapter - Detroit

    EIN 853609705 · Headquarters: Taylor, MI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  85. Sigma Pkp House Corporation

    EIN 010821076 · Headquarters: Columbia, SC, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  86. Sigma Psi Zeta

    EIN 474028644 · Headquarters: San Jose, CA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  87. Sigma Psi Zeta Sorority - Alpha Theta

    EIN 863323362 · Headquarters: Wichita, KS, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  88. Sigma Psi Zeta Sorority Inc - Alpha Pi

    EIN 841797685 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  89. Sigma Psi Zeta Sorority Inc - Alpha Psi

    EIN 874764687 · Headquarters: Philadelphia, PA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  90. Sigma Psi Zeta Sorority Incorporated

    EIN 464452521 · Headquarters: New York, NY, US · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  91. Sigma Psi Zeta Sorority Incorporated

    EIN 834479390 · Headquarters: New Brunswick, NJ, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  92. Sigma Reach

    EIN 364935676 · Headquarters: Fort Worth, TX, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  93. Sigma Rho Epsilon

    EIN 371299614 · Headquarters: Charleston, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  94. Sigma Rho Incorporated

    EIN 386091453 · Headquarters: HOUGHTON, MI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  95. Sigma Rho Sorority Inc

    EIN 800269587 · Headquarters: BEAUFORT, SC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. Sigma Sigma Phi

    EIN 016024158 · Headquarters: Cedar Park, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. Sigma Sigma Phi

    EIN 263175522 · Headquarters: Biddeford, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  98. Sigma Sigma Phi

    EIN 263196965 · Headquarters: Glendale, AZ, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  99. Sigma Sigma Phi

    EIN 263308012 · Headquarters: Pomona, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  100. Sigma Sigma Phi

    EIN 263342914 · Headquarters: SUWANEE, GA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

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