Liabilities / Assets
67th percentile
Higher debt load relative to assets than 67% of similar nonprofits.
EIN 36-2958324 • 501(c)3 • Rolling Meadows, IL
Profile
Founded in 1931 as the Harvey Cushing Society, the American Association of Neurosurgeons (AAN), doing business as AANS, is a scientific and educational association with over 10,509 members worldwide. The AAN is dedicated to advancing the specialty of neurological surgery in order to provide the highest quality of neurosurgical care to the public. All fellow members of the AAN are board certified by the American Board of Neurological Surgery, the Royal College of Physicians and Surgeons of Canada, or the Mexican Council of Neurological Surgery, A.C. Neurological surgery is the medical specialty concerned with the prevention, diagnosis, treatment and rehabilitation of disorders that affect the entire nervous system, including the spinal column, spinal cord, brain and peripheral nerves.
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
67th percentile
Higher debt load relative to assets than 67% of similar nonprofits.
Liabilities / Revenue
75th percentile
Higher debt load relative to revenue than 75% of similar nonprofits.
Net Margin
9th percentile
Higher net margin than 9% of similar nonprofits.
Top Officer Pay
89th percentile
Higher top officer pay than 89% of similar nonprofits.
Top officer pay equals 4.4% of source-year revenue.
Asset Growth
2nd percentile
Faster asset growth than 2% of similar nonprofits.
Revenue Growth
60th percentile
Faster revenue growth than 60% of similar nonprofits.
Assets
Down$31,913,486
Down $30,644,425 (-49%) from 2023
Liabilities
Down$13,037,599
Down $7,679,802 (-37%) from 2023
Net Assets
Down$18,875,887
Down $22,964,623 (-55%) from 2023
Revenue
Up$15,303,546
Up $1,684,540 (+12%) from 2023
Expenses
Up$18,938,539
Up $1,862,741 (+11%) from 2023
Net Income
Down-$3,634,993
Down $178,201 (-5.2%) from 2023
Most recent year
2024 • Form 990Facts available. Structured filing facts are available, but richer extracted sections are limited.
The AANS promotes the highest quality of patient care and advances the specialty of neurological surgery.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Investments in Publicly Traded Securities | $38,282,361 | $20,253,355 | ▼ $18,029,006 |
| Accounts Receivable | $3,922,832 | $8,685,214 | ▲ $4,762,382 |
| Land, Buildings, and Equipment, Net | $10,612,021 | $4,359,233 | ▼ $6,252,788 |
| Investments Other Securities | $1,127,948 | $0 | ▼ $1,127,948 |
| Prepaid Expenses and Deferred Charges | $1,661,813 | $680,937 | ▼ $980,876 |
| Inventories for Sale or Use | $177,439 | $123,898 | ▼ $53,541 |
| Savings and Temporary Cash Investments | $6,335,601 | $-2,408,099 | ▼ $8,743,700 |
| Total Assets | $62,557,911 | $31,913,486 | ▼ $30,644,425 |
| Other Assets Total | $437,896 | $218,948 | ▼ $218,948 |
| Liabilities | |||
| Accounts Payable and Accrued Expenses | $19,377,723 | $10,560,692 | ▼ $8,817,031 |
| Deferred Revenue | $1,339,626 | $2,453,311 | ▲ $1,113,685 |
| Other Liabilities | $52 | $23,596 | ▲ $23,544 |
| Total Liabilities | $20,717,401 | $13,037,599 | ▼ $7,679,802 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $24,172,261 | $13,081,911 | ▼ $11,090,350 |
| Net Assets With Donor Restrictions | $17,668,249 | $5,793,976 | ▼ $11,874,273 |
| Total Net Assets Fund Balance | $41,840,510 | $18,875,887 | ▼ $22,964,623 |
| Total Liabilities and Net Assets / Fund Balance | $62,557,911 | $31,913,486 | ▼ $30,644,425 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Buildings | $2,129,558 | $2,707,426 | $4,836,984 |
| Other Land Buildings | $1,456,573 | $2,542,656 | $3,999,229 |
| Equipment | $-15,798 | $1,862,541 | $1,846,743 |
| Land | $788,900 | - | $788,900 |
| Period | Beginning | Contrib. | Gain/Loss | Other Uses | End |
|---|---|---|---|---|---|
| 2023 | $21,716,126 | - | ▲ $2,117,892 | - | $23,726,194 |
| 2022 | $21,778,424 | - | - | - | $21,716,126 |
| 2021 | $21,778,424 | - | - | - | $21,778,424 |
| 2020 | $17,014,394 | - | ▲ $4,764,030 | - | $21,778,424 |
| 2019 | $16,808,584 | $100,000 | ▲ $107,562 | $1,752 | $17,014,394 |
| Name | Title | Full / Part Time | Base | Other | Total |
|---|---|---|---|---|---|
| Kathleen T Craig | CEO (until 12/31/23) | PT | $623,276 | $54,323 | $677,599 |
| Katherine O Orrico | Chief Executive Officer | PT | $312,014 | $68,386 | $380,400 |
| Stefan P Rykowski | VP, Registries & Data Services | FT | $203,146 | $43,578 | $246,724 |
| Carol Jones | Chief Financial Officer | PT | $190,681 | $34,214 | $224,895 |
| Adrienne R Mortimer | Senior Manager, Legislative Affairs | FT | $153,505 | $49,197 | $202,702 |
| Cathy J Hill | Senior Manager, Regulatory Affair | FT | $163,069 | $38,629 | $201,698 |
| Kimberly Jacques | Chief Strategy Officer | FT | $152,186 | $38,685 | $190,871 |
| Ann Marie Bray | Senior, Director of Event Strategy | FT | $139,437 | $22,086 | $161,523 |
| Spencer Bone | Director of Marketing | FT | $135,743 | $24,620 | $160,363 |
| William T John | Accounting Manager | FT | $109,867 | $47,959 | $157,826 |
| Name | Title |
|---|---|
| E Sander Connolly | AANS Incoming President-Elect |
| Ann R Stroink | AANS Past President |
| Anthony L Asher | AANS President |
| Jacques J Morcos | AANS President-Elect |
| John Joseph Knightly | AANS Vice President |
| Domagoj Coric | Director-at-Large |
| Jason P Sheehan | Director-at-Large |
| Joseph S Cheng | Director-at-Large |
| Marjorie C Wang | Director-at-Large |
| Richard W Byrne | Director-at-Large |
| Stacey C Wolfe | Director-at-Large |
| Mark E Linskey | Regional Director |
| Mark R Iantosca | Regional Director |
| Sharon Woods Webb | Regional Director |
| Shaun Thomas O'Leary | Regional Director |
| E Antonio Chiocca | AANS Secretary |
| Sepideh Amin-Hanjani | AANS Treasurer |
| Line Item | Amount |
|---|---|
| Other Expenses | $11,051,180 |
| Salaries, Compensation, and Employee Benefits | $7,841,619 |
| Grants and Similar Amounts Paid | $45,740 |
| Professional Fundraising Fees | $0 |
| Total Fundraising Expense | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Conferences and Meetings | $3,298,341 | $563,234 | - | $3,861,575 |
| Other Salaries and Wages | $2,109,707 | $1,657,627 | - | $3,767,334 |
| Current Officers, Directors, Trustees, and Key Employees | $1,120,526 | $880,413 | - | $2,000,939 |
| Fees for Services Other | $1,499,348 | $51,757 | - | $1,551,105 |
| Other Employee Benefits | $675,172 | $530,493 | - | $1,205,665 |
| Fees for Services Management | - | $1,013,124 | - | $1,013,124 |
| Travel | $441,602 | $264,015 | - | $705,617 |
| Information Technology | $37,966 | $497,935 | - | $535,901 |
| Payroll Taxes | $284,744 | $223,727 | - | $508,471 |
| Pension Plan Contributions | $201,158 | $158,052 | - | $359,210 |
| Depreciation Depletion | $5,872 | $336,002 | - | $341,874 |
| Office Expenses | $179,903 | $113,682 | - | $293,585 |
| Advertising | $131,225 | $99,672 | - | $230,897 |
| Occupancy | - | $193,104 | - | $193,104 |
| Other Expenses | $1,532,702 | $183,000 | - | $183,000 |
| Insurance | $47,556 | $134,401 | - | $181,957 |
| Fees for Services Legal | - | $162,251 | - | $162,251 |
| Fees for Service Investment Mgmnt Fees | - | $125,067 | - | $125,067 |
| All Other Expenses | - | $95,198 | - | $95,198 |
| Grants to Domestic Individuals | $44,740 | - | - | $44,740 |
| Fees for Services Accounting | - | $44,223 | - | $44,223 |
| Foreign Grants | $1,000 | - | - | $1,000 |
| Total Functional Expenses | $11,611,562 | $7,326,977 | $0 | $18,938,539 |
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
| Liability | Amount |
|---|---|
| Due to Related Parties | $23,596 |
“All Members of the American Association of Neurological Surgeons (AANS) shall be considered Members of American Association of Neurosurgeons (AAN). The Members elected to the AANS shall be divided into eleven classes: 1) Fellow 2) Provisional 3) International 4) Associate 5) Allied 6) Lifetime 7) Candidate 8) International Candidate 9) Honorary 10) Affiliate 11) Student Only Fellows, Provisional, and Lifetime Members may vote. Only Fellows may hold office.”
“The Officers and Directors shall be nominated and elected by the Members.”
“The Form 990 is reviewed within the Association's Accounting Department by the Accounting Manager and Chief Financial Officer. Input for Form 990 inclusion is submitted to the Association's tax preparer by the Accounting Department. After Form 990 is completed by the Association's tax preparer, the Form 990 is again reviewed by both the Accounting Manager and Chief Financial Officer prior to filing with the IRS.”
“As a CME provider accredited by the ACCME, the AAN requires all individuals (and their significant others) in a position to influence and/or control the content of AAN directly and jointly sponsored CME activities to disclose to the AAN and subsequently to learners that the individual either has no relevant financial relationship or has any relevant financial relationships with a commercial interest. All disclosure information must be provided to AAN CME activity participants prior to the beginning of the CME activity. If a disclosure is not completed, the individual will not participate in the activity. All potential conflicts of interest identified through review of the disclosure form must be resolved in order for individuals in a position to influence and/or control CME content to be confirmed for the educational assignment. The resolution process and documents must be documented in the CME activity file. A conflict of interest disclosure must also be completed yearly by AAN Committee Members. Anyone who does not complete the disclosure will not participate on the Committee.”
“The Chief Executive Officer's annual compensation is subject to the provisions in their employment contract: The Executive shall receive a base salary, paid in accordance with the Association's normal payroll practices. Effective as of January 1, 2021, the Executive's base salary shall be at an annual rate of $500,000, and shall increase three percent (3%) on January 1st of each year. In addition, during the period of November 1, 2018 through December 31, 2018, the Association and the Executives agree to meet in good faith to renegotiate the Executive's base salary to determine any other appropriate increase. The Association may award the Executive bonuses in such amounts and at such times as the Association's Review Committee, in his or her sole discretion, deems appropriate. This process is documented. Compensation for the CFO and Associate Executive Directors is determined by the Chief Executive Officer. The CEO's basis for determining compensation is based on market data including the Association Forum of Chicagoland.”
“The organization makes its governing documents, conflict of interest policy and financial statements available to the public upon request for the same period of disclosure as set forth in IRC Section 6104(d).”
“Transfer from American Association of Neurological Surgeons, Inc. 2,401,828.”
“The Organization maintains a collection of books, documents, and memorabilia related to the history and development of the neurological sciences. Such items are used in historical exhibits, research projects by members, and select items are available on-line for viewing.”
“The Association's endowment funds are used according to the intended stipulation(s) set forth by the donor.”
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
| Path | # | Value |
|---|---|---|
| IRS990/AccountantCompileOrReviewInd | 0 | 0 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 19377723 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 10560692 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 3922832 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 8685214 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | The AANS promotes the highest quality of patient care and advances the specialty of neurological surgery. |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 99672 |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 131225 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 230897 |
| IRS990/AllOtherContributionsAmt | 0 | 308693 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 95198 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 95198 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | Carol Jones |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 8473780500 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 5550 Meadowbrook Industrial Court |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | Rolling Meadows |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | IL |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 60008 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | 0 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | 1 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 880413 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 1120526 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 2000939 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 1 |
| IRS990/CompensationProcessOtherInd | 0 | 0 |
| IRS990/ConferencesMeetingsGrp/ManagementAndGeneralAmt | 0 | 563234 |
| IRS990/ConferencesMeetingsGrp/ProgramServicesAmt | 0 | 3298341 |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 3861575 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 308693 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 45740 |
| IRS990/CYInvestmentIncomeAmt | 0 | 2089296 |
| IRS990/CYOtherExpensesAmt | 0 | 11051180 |
| IRS990/CYOtherRevenueAmt | 0 | 327691 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 12577866 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -3634993 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 7841619 |
| IRS990/CYTotalExpensesAmt | 0 | 18938539 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 0 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 15303546 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 0 |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 1339626 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 2453311 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 336002 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 5872 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 341874 |
| IRS990/Desc | 0 | The Annual Meeting: The AANS Annual Meeting educates members and non-members about neurosurgical and socioeconomic topics as well as provides a trade show for the specialty. During FY 2024, AANS's Annual Meeting was held in Chicago, Illinois from May 3 through May 6, 2024. |
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| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DoingBusinessAsName/BusinessNameLine1Txt | 0 | AANS |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/DonorRestrictionNetAssetsGrp/BOYAmt | 0 | 17668249 |
| IRS990/DonorRestrictionNetAssetsGrp/EOYAmt | 0 | 5793976 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | 1 |
| IRS990/ElectionOfBoardMembersInd | 0 | 1 |
| IRS990/EmployeeCnt | 0 | 64 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 4280254 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
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| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 44223 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 44223 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 162251 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 162251 |
| IRS990/FeesForServicesManagementGrp/ManagementAndGeneralAmt | 0 | 1013124 |
| IRS990/FeesForServicesManagementGrp/TotalAmt | 0 | 1013124 |
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| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 1499348 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 1551105 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/ManagementAndGeneralAmt | 0 | 125067 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 125067 |
| IRS990/ForeignActivitiesInd | 0 | 0 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignGrantsGrp/ProgramServicesAmt | 0 | 1000 |
| IRS990/ForeignGrantsGrp/TotalAmt | 0 | 1000 |
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| IRS990/Form990PartVIISectionAGrp/OfficerInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 7 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 8 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 9 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 10 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 17 | 54323 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 18 | 34214 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 19 | 53386 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 20 | 34518 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 21 | 37629 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 22 | 43578 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 23 | 48197 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 24 | 24620 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 25 | 22086 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 26 | 47959 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | Anthony L Asher |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | Jacques J Morcos |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | E Sander Connolly |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | John Joseph Knightly |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | E Antonio Chiocca |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | Sepideh Amin-Hanjani |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | Ann R Stroink |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | Richard W Byrne |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | Joseph S Cheng |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | Domagoj Coric |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | Jason P Sheehan |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | Marjorie C Wang |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | Stacey C Wolfe |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | Shaun Thomas O'Leary |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | Mark E Linskey |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | Mark R Iantosca |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 16 | Sharon Woods Webb |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 17 | Kathleen T Craig |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 18 | Carol Jones |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 19 | Katherine O Orrico |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 20 | Kimberly Jacques |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 21 | Cathy J Hill |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 22 | Stefan P Rykowski |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 23 | Adrienne R Mortimer |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 24 | Spencer Bone |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 25 | Ann Marie Bray |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 26 | William T John |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 17 | 623276 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 18 | 190681 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 19 | 327014 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 20 | 156353 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 21 | 164069 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 22 | 203146 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 23 | 154505 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 24 | 135743 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 25 | 139437 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 26 | 109867 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 17 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 18 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 19 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 20 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 21 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 22 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 23 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 24 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 25 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 26 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | AANS President |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | AANS President-Elect |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | AANS Incoming President-Elect |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | AANS Vice President |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | AANS Secretary |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | AANS Treasurer |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | AANS Past President |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | Director-at-Large |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | Director-at-Large |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | Director-at-Large |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | Director-at-Large |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | Director-at-Large |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | Director-at-Large |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | Regional Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | Regional Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 15 | Regional Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 16 | Regional Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 17 | CEO (until 12/31/23) |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 18 | Chief Financial Officer |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 19 | Chief Executive Officer |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 20 | Chief Strategy Officer |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 21 | Senior Manager, Regulatory Affair |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 22 | VP, Registries & Data Services |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 23 | Senior Manager, Legislative Affairs |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 24 | Director of Marketing |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 25 | Senior, Director of Event Strategy |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 26 | Accounting Manager |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 0 |
| IRS990/Form990TFiledInd | 0 | 1 |
| IRS990/FormationYr | 0 | 1956 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedInd | 0 | 0 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 1541934 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 17 |
| IRS990/GrantAmt | 0 | 45740 |
| IRS990/GrantsToDomesticIndividualsGrp/ProgramServicesAmt | 0 | 44740 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 44740 |
| IRS990/GrantsToIndividualsInd | 0 | 1 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 6864316 |
| IRS990/GrossReceiptsAmt | 0 | 20625928 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 0 |
| IRS990/IndependentVotingMemberCnt | 0 | 17 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 9 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIInd | 0 | X |
| IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt | 0 | 497935 |
| IRS990/InformationTechnologyGrp/ProgramServicesAmt | 0 | 37966 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 535901 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 134401 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 47556 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 181957 |
| IRS990/InventoriesForSaleOrUseGrp/BOYAmt | 0 | 177439 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 123898 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 547362 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 547362 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsOtherSecuritiesGrp/BOYAmt | 0 | 1127948 |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 38282361 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 20253355 |
| IRS990/IRPDocumentCnt | 0 | 0 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 7112623 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 10612021 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 4359233 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 11471856 |
| IRS990/LegalDomicileStateCd | 0 | IL |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 5322382 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembersOrStockholdersInd | 0 | 1 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MiscellaneousRevenueGrp/ExclusionAmt | 0 | 315276 |
| IRS990/MiscellaneousRevenueGrp/TotalRevenueColumnAmt | 0 | 315276 |
| IRS990/MissionDesc | 0 | The AANS promotes the highest quality of patient care and advances the specialty of neurological surgery. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 41840510 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 18875887 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | 1541934 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 1541934 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 260217 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 494809 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 24172261 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 13081911 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 193104 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 193104 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 113682 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 179903 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 293585 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 437896 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 218948 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 2401828 |
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