Apple Inc.
CH ˙ SWX ˙ US0378331005
SecurityCH:AAPL / Apple Inc.
InstitutionCorundum Group, Inc.
Latest Disclosed Ownership23,510 shares
Latest Disclosed Value $ 5,966,693
Corundum Group, Inc. reports 0.17% increase in ownership of AAPL / Apple Inc.

On April 20, 2026 - Corundum Group, Inc. filed a 13F-HR form disclosing ownership of 23,510 shares of Apple Inc. (CH:AAPL) valued at $5,966,693 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 12, 2026 disclosing 23,469 shares of Apple Inc.. This represents a change in shares of 0.17% during the quarter.

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)
2026-04-20 2026-03-31 13F APPLE CS 037833100 23,510 41 0.17 5,967 -6.49 1.9942
2026-01-12 2025-12-31 13F APPLE CS 037833100 23,469 14 0.06 6,380 6.83 2.1410
2025-10-24 2025-09-30 13F APPLE CS 037833100 23,455 -470 -1.96 5,972 21.68 2.4538
2025-07-21 2025-06-30 13F APPLE CS 037833100 23,925 -44 -0.18 4,909 -7.81 2.1704
2025-04-23 2025-03-31 13F APPLE CS 037833100 23,969 -3,882 -13.94 5,324 -23.66 2.5535
2025-01-16 2024-12-31 13F APPLE CS 037833100 27,851 3,258 13.25 6,974 21.71 2.6043
2024-10-21 2024-09-30 13F APPLE CS 037833100 24,593 -3,768 -13.29 5,730 -4.07 2.6143
2024-07-17 2024-06-30 13F APPLE CS 037833100 28,361 -4,281 -13.12 5,973 6.72 2.3337
2024-04-15 2024-03-31 13F APPLE CS 037833100 32,642 -2,043 -5.89 5,597 -16.17 2.6996
2024-01-24 2023-12-31 13F APPLE CS 037833100 34,685 -1,652 -4.55 6,678 7.33 3.3482
2023-10-17 2023-09-30 13F APPLE CS 037833100 36,337 -2,116 -5.50 6,221 -16.59 3.5348
2023-07-21 2023-06-30 13F APPLE CS 037833100 38,453 6,801 21.49 7,459 42.90 3.7202
2023-04-24 2023-03-31 13F APPLE CS 037833100 31,652 -739 -2.28 5,219 130,375.00 2.4689
2023-01-12 2022-12-31 13F APPLE CS 037833100 32,391 -289 -0.88 4 -99.91 2.3767
2022-10-18 2022-09-30 13F APPLE CS 037833100 32,680 7,429 29.42 4,516 30.82 2.8410
2022-07-25 2022-06-30 13F APPLE CS 037833100 25,251 3,049 13.73 3,452 -10.96 2.3321
2022-05-02 2022-03-31 13F APPLE CS 037833100 22,202 5,450 32.53 3,877 30.32 3.6033
2022-02-07 2021-12-31 13F APPLE CS 037833100 16,752 1,536 10.09 2,975 38.18 1.9369
2021-11-02 2021-09-30 13F APPLE CS 037833100 15,216 -56 -0.37 2,153 2.92 1.5962
2021-08-02 2021-06-30 13F APPLE CS 037833100 15,272 -800 -4.98 2,092 6.57 1.3720
2021-05-10 2021-03-31 13F APPLE CS 037833100 16,072 -271 -1.66 1,963 -9.50 1.5341
2021-02-03 2020-12-31 13F APPLE CS 037833100 16,343 1,609 10.92 2,169 27.14 1.8072
2020-11-12 2020-09-30 13F/A-1 APPLE CS 037833100 14,734 11,919 423.41 1,706 66.11 1.6527
2020-08-07 2020-06-30 13F/A-1 APPLE CS 037833100 2,815 -32 -1.12 1,027 41.85 1.2315
2020-05-07 2020-03-31 13F/A-1 APPLE CS 037833100 2,847 -186 -6.13 724 -18.74 1.0294
2020-01-28 2019-12-31 13F APPLE CS 037833100 3,033 31 1.03 891 32.59 0.9357
2019-11-01 2019-09-30 13F/A-1 APPLE CS 037833100 3,002 0 0.00 672 13.13 0.7784
2019-08-02 2019-06-30 13F APPLE CS 037833100 3,002 801 36.39 594 42.11 0.6824
2019-05-08 2019-03-31 13F APPLE CS 037833100 2,201 -2,082 -48.61 418 -38.17 0.4782
2019-02-19 2018-12-31 13F APPLE CS 037833100 4,283 2,346 121.12 676 88.30 0.6206
2018-08-07 2018-06-30 13F APPLE CS 037833100 1,937 -55 -2.76 359 7.49 0.4426
2018-05-08 2018-03-31 13F APPLE CS 037833100 1,992 59 3.05 334 2.14 0.3612
2018-02-13 2017-12-31 13F APPLE COM 037833100 1,933 -309 -13.78 327 -5.49 0.3529
2017-11-03 2017-09-30 13F APPLE COM 037833100 2,242 299 15.39 346 23.57 0.3647
2017-08-01 2017-06-30 13F APPLE CS 037833100 1,943 1,943 280 0.6203
2015-02-05 2014-12-31 13F APPLE CS 037833100 0 -2,197 -100.00 0 -100.00
2014-11-04 2014-09-30 13F APPLE CS 037833100 2,197 21 0.97 221 9.41 1.0477
2014-08-05 2014-06-30 13F APPLE CS 037833100 2,176 2,176 202 0.9471
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.