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 Chi - Delta Eta Chapter

    EIN 951716023 · Headquarters: Los Angeles, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  2. Sigma Chi - Ohio University

    EIN 473011091 · Headquarters: Athens, OH, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  3. Sigma Chi Alpha

    EIN 881995010 · Headquarters: Bridgeport, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  4. Sigma Chi Alpha Phi Chapter Sciarabba Walker & Co Llp

    EIN 150537026 · Headquarters: ITHACA, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  5. Sigma Chi Alumni Chapter of Phi Sigma Epsilon Inc

    EIN 881379657 · Headquarters: Martinsburg, WV, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  6. Sigma Chi Alumni House Corp Delta Theta Chapter

    EIN 620491064 · Headquarters: CHATTANOOGA, TN, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  7. Sigma Chi at Missouri State University

    EIN 431118351 · Headquarters: Overland Park, KS, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  8. Sigma Chi Beta Sigma

    EIN 923273944 · Headquarters: KNOXVILLE, TN, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  9. Sigma Chi Brown University Alumni

    EIN 811672098 · Headquarters: Portsmouth, RI, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  10. Sigma Chi Building Association

    EIN 411365083 · Headquarters: MINNEAPOLIS, MN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  11. Sigma Chi Building Association

    EIN 916055568 · Headquarters: SEATTLE, WA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  12. Sigma Chi Building Association

    EIN 936026158 · Headquarters: EUGENE, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  13. Sigma Chi Building Company

    EIN 310537567 · Headquarters: HAMILTON, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  14. Sigma Chi Building Company

    EIN 860171099 · Headquarters: Tucson, AZ, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  15. Sigma Chi Building Corporation

    EIN 470689933 · Headquarters: LINCOLN, NE, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  16. Sigma Chi Building Corporation

    EIN 710566015 · Headquarters: LITTLE ROCK, AR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  17. Sigma Chi Chapter House of Depauw University

    EIN 350882977 · Headquarters: WESTFIELD, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  18. Sigma Chi Chapter House of Purdue

    EIN 356019397 · Headquarters: GLEN ELLYN, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  19. Sigma Chi Columbia Alumni

    EIN 473671985 · Headquarters: Columbia, SC, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  20. Sigma Chi Delta House Corporation

    EIN 237201115 · Headquarters: Wexford, PA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  21. Sigma Chi Education Foundation of Missouri Inc

    EIN 481120253 · Headquarters: SAINT LOUIS, MO, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  22. Sigma Chi Eta Psi Chapter Housing Corporation

    EIN 570988598 · Headquarters: Columbia, SC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. Sigma Chi Fra-zeta Psi

    EIN 316077296 · Headquarters: CINCINNATI, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  24. Sigma Chi Fraternity

    EIN 042112474 · Headquarters: Boston, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  25. Sigma Chi Fraternity

    EIN 061209372 · Headquarters: New Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  26. Sigma Chi Fraternity

    EIN 141345339 · Headquarters: AVERILL PARK, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  27. Sigma Chi Fraternity

    EIN 161194211 · Headquarters: ROCHESTER, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  28. Sigma Chi Fraternity

    EIN 161332807 · Headquarters: Potsdam, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  29. Sigma Chi Fraternity

    EIN 237112809 · Headquarters: MUFREESBORO, TN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  30. Sigma Chi Fraternity

    EIN 237222167 · Headquarters: Woodbridge, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  31. Sigma Chi Fraternity

    EIN 237367657 · Headquarters: Indiana, PA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  32. Sigma Chi Fraternity

    EIN 240799194 · Headquarters: LEWISBURG, PA, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  33. Sigma Chi Fraternity

    EIN 260102490 · Headquarters: Prescott Valley, AZ, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  34. Sigma Chi Fraternity

    EIN 270656582 · Headquarters: CHICAGO, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  35. Sigma Chi Fraternity

    EIN 271531929 · Headquarters: ROCHESTER, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  36. Sigma Chi Fraternity

    EIN 272071939 · Headquarters: The Woodlands, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  37. Sigma Chi Fraternity

    EIN 300617583 · Headquarters: Ashburn, VA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. Sigma Chi Fraternity

    EIN 330140394 · Headquarters: POMONA, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. Sigma Chi Fraternity

    EIN 346402079 · Headquarters: KENT, OH, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  40. Sigma Chi Fraternity

    EIN 363308583 · Headquarters: DAHLONEGA, GA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  41. Sigma Chi Fraternity

    EIN 363385965 · Headquarters: New York, NY, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  42. Sigma Chi Fraternity

    EIN 381032151 · Headquarters: Albion, MI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  43. Sigma Chi Fraternity

    EIN 386120941 · Headquarters: Kalamazoo, MI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  44. Sigma Chi Fraternity

    EIN 390972993 · Headquarters: Beloit, WI, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  45. Sigma Chi Fraternity

    EIN 410538594 · Headquarters: MINNEAPOLIS, MN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  46. Sigma Chi Fraternity

    EIN 411613095 · Headquarters: Saint Paul, MN, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. Sigma Chi Fraternity

    EIN 420524690 · Headquarters: IOWA CITY, IA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  48. Sigma Chi Fraternity

    EIN 450194225 · Headquarters: Fargo, ND, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  49. Sigma Chi Fraternity

    EIN 450194230 · Headquarters: Grand Forks, ND, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  50. Sigma Chi Fraternity

    EIN 451322338 · Headquarters: Kailua, HI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  51. Sigma Chi Fraternity

    EIN 451443270 · Headquarters: Duluth, GA, US · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  52. Sigma Chi Fraternity

    EIN 453137354 · Headquarters: Chicago, IL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  53. Sigma Chi Fraternity

    EIN 454425349 · Headquarters: Pittsburgh, PA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  54. Sigma Chi Fraternity

    EIN 471498451 · Headquarters: Springfield, MO, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  55. Sigma Chi Fraternity

    EIN 471785345 · Headquarters: DURHAM, NH, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  56. Sigma Chi Fraternity

    EIN 480686218 · Headquarters: PITTSBURG, KS, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. Sigma Chi Fraternity

    EIN 510185655 · Headquarters: Addison, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  58. Sigma Chi Fraternity

    EIN 540930880 · Headquarters: WILLIAMSBURG, VA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Sigma Chi Fraternity

    EIN 560812412 · Headquarters: RALEIGH, NC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  60. Sigma Chi Fraternity

    EIN 561533574 · Headquarters: Elon, NC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  61. Sigma Chi Fraternity

    EIN 566086697 · Headquarters: Winston Salem, NC, USA · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-EZ

  62. Sigma Chi Fraternity

    EIN 580574897 · Headquarters: Athens, GA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. Sigma Chi Fraternity

    EIN 580898289 · Headquarters: ATLANTA, GA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  64. Sigma Chi Fraternity

    EIN 593247186 · Headquarters: Jacksonville, FL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  65. Sigma Chi Fraternity

    EIN 596153511 · Headquarters: Fort Lauderdale, FL, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  66. Sigma Chi Fraternity

    EIN 611674643 · Headquarters: HOUSTON, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  67. Sigma Chi Fraternity

    EIN 710617336 · Headquarters: State University, AR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  68. Sigma Chi Fraternity

    EIN 746081399 · Headquarters: Kingsville, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. Sigma Chi Fraternity

    EIN 753102356 · Headquarters: Mankato, MN, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  70. Sigma Chi Fraternity

    EIN 800339463 · Headquarters: Davis, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  71. Sigma Chi Fraternity

    EIN 811822992 · Headquarters: Arlington, TX, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  72. Sigma Chi Fraternity

    EIN 811834938 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. Sigma Chi Fraternity

    EIN 812229243 · Headquarters: Lakeland, FL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. Sigma Chi Fraternity

    EIN 812602633 · Headquarters: SCHENECTADY, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. Sigma Chi Fraternity

    EIN 813513904 · Headquarters: Saint Louis, MO, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  76. Sigma Chi Fraternity

    EIN 820201543 · Headquarters: MOSCOW, ID, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  77. Sigma Chi Fraternity

    EIN 820446519 · Headquarters: Caldwell, ID, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  78. Sigma Chi Fraternity

    EIN 821096677 · Headquarters: Oxford, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. Sigma Chi Fraternity

    EIN 822676922 · Headquarters: Fairfield, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  80. Sigma Chi Fraternity

    EIN 823140489 · Headquarters: SAN DIEGO, CA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  81. Sigma Chi Fraternity

    EIN 831019228 · Headquarters: WEST HAVEN, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  82. Sigma Chi Fraternity

    EIN 840418572 · Headquarters: Colorado Springs, CO, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  83. Sigma Chi Fraternity

    EIN 856015758 · Headquarters: Albuquerque, NM, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  84. Sigma Chi Fraternity

    EIN 860180140 · Headquarters: TEMPE, AZ, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  85. Sigma Chi Fraternity

    EIN 870484629 · Headquarters: CEDAR CITY, UT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. Sigma Chi Fraternity

    EIN 954730642 · Headquarters: Malibu, CA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  87. Sigma Chi Fraternity - Beta Phi Chapter

    EIN 860133558 · Headquarters: Tucson, AZ, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  88. Sigma Chi Fraternity - Eta Chapter

    EIN 640315255 · Headquarters: OXFORD, MS, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  89. Sigma Chi Fraternity - Lamba Zeta Chapter

    EIN 300518150 · Headquarters: FORT MYERS, FL, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  90. Sigma Chi Fraternity Alpha Chi Chapter

    EIN 240798433 · Headquarters: State College, PA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  91. Sigma Chi Fraternity Alpha Epsilon Chapter

    EIN 470298330 · Headquarters: LINCOLN, NE, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  92. Sigma Chi Fraternity Alpha Iota Chapter

    EIN 370663117 · Headquarters: BLOOMINGTON, IL, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  93. Sigma Chi Fraternity Alpha Kappa

    EIN 363171463 · Headquarters: Hillsdale, MI, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  94. Sigma Chi Fraternity Alpha Xi Chapter

    EIN 480417700 · Headquarters: MISSION HILLS, KS, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  95. Sigma Chi Fraternity Beta Iota Chapter

    EIN 930123625 · Headquarters: EUGENE, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  96. Sigma Chi Fraternity Beta Kappa Chapter

    EIN 736100261 · Headquarters: Norman, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  97. Sigma Chi Fraternity Beta Omicron Chapter

    EIN 420524685 · Headquarters: AMES, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  98. Sigma Chi Fraternity Beta Psi Chapter

    EIN 580574830 · Headquarters: Atlanta, GA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  99. Sigma Chi Fraternity Chi Chi Chapter

    EIN 631024577 · Headquarters: BIRMINGHAM, AL, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  100. Sigma Chi Fraternity Delta Delta Chapter

    EIN 350879378 · Headquarters: WEST LAFAYETTE, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

First page and all pages