AAR Corp.
US ˙ NYSE ˙ US0003611052

SecurityAIR / AAR Corp.
InstitutionAssetmark, Inc
Latest Disclosed Ownership1,606 shares
Latest Disclosed Value $ 175,793
Assetmark, Inc reports 10.68% increase in ownership of AIR / AAR Corp.

On May 6, 2026 - Assetmark, Inc filed a 13F-HR form disclosing ownership of 1,606 shares of AAR Corp. (US:AIR) valued at $175,793 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 1,451 shares of AAR Corp.. This represents a change in shares of 10.68% during the quarter. The current value of the position is $185,541 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-06 2026-03-31 13F AAR COM 000361105 1,606 155 10.68 176 45.83 0.0004
2026-01-23 2025-12-31 13F AAR COM 000361105 1,451 -105 -6.75 120 -13.67 0.0002
2025-11-06 2025-09-30 13F AAR COM 000361105 1,556 1,491 2,293.85 140 3,375.00 0.0003
2025-08-04 2025-06-30 13F AAR COM 000361105 65 65 4 0.0000
2024-05-07 2024-03-31 13F AAR COM 000361105 0 -3 -100.00 0 0.0000
2024-02-09 2023-12-31 13F AAR COM 000361105 3 3 0 0.0000
2020-05-12 2020-03-31 13F AAR CORP COM COM 000361105 0 -890 -100.00 0 -100.00
2020-02-11 2019-12-31 13F AAR CORP COM COM 000361105 890 0 0.00 40 8.11 0.0003
2019-11-13 2019-09-30 13F AAR CORP COM COM 000361105 890 0 0.00 37 12.12 0.0003
2019-08-14 2019-06-30 13F AAR CORP COM COM 000361105 890 0 0.00 33 13.79 0.0003
2019-05-14 2019-03-31 13F AAR CORP COM COM 000361105 890 0 0.00 29 -12.12 0.0003
2019-02-13 2018-12-31 13F AAR CORP COM COM 000361105 890 -77 -7.96 33 -28.26 0.0003
2018-11-13 2018-09-30 13F AAR CORP COM COM 000361105 967 200 26.08 46 27.78 0.0004
2018-08-01 2018-06-30 13F AAR CORP COM COM 000361105 767 0 0.00 36 5.88 0.0004
2018-05-16 2018-03-31 13F AAR CORP COM COM 000361105 767 756 6,872.73 34 0.0004
2018-02-13 2017-12-31 13F AAR CORP COM COM 000361105 11 11 0 0.0000
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.