Amazon.com, Inc.
BG ˙ BUL ˙ US0231351067
SecurityBG:AMZ / Amazon.com, Inc.
InstitutionPenbrook Management LLC
Latest Disclosed Ownership51,760 shares
Latest Disclosed Value $ 10,780,055
Penbrook Management LLC ownership in AMZ / Amazon.com, Inc.

On April 21, 2026 - Penbrook Management LLC filed a 13F-HR form disclosing ownership of 51,760 shares of Amazon.com, Inc. (BG:AMZ) valued at $10,780,055 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 6, 2026 disclosing 51,760 shares of Amazon.com, Inc.. This represents a change in shares of 0.00% 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)
2026-04-21 2026-03-31 13F AMAZON COM INC COM Stock 023135106 51,760 0 0.00 10,780 -9.77 8.1631
2026-01-06 2025-12-31 13F AMAZON COM Stock 023135106 51,760 20 0.04 11,947 5.17 8.2407
2025-10-22 2025-09-30 13F AMAZON COM INC COM Stock 023135106 51,740 385 0.75 11,361 0.83 7.9319
2025-07-28 2025-06-30 13F/A-1 AMAZON COM INC COM Stock 023135106 51,355 -885 -1.69 11,267 13.35 8.4721
2025-07-25 2025-06-30 13F AMAZON COM Stock 023135106 52,240 0 9,939 7.5129
2025-04-01 2025-03-31 13F AMAZON COM Stock 023135106 52,240 -100 -0.19 9,939 -13.44 7.5129
2025-01-23 2024-12-31 13F AMAZON COM Stock 023135106 52,340 -300 -0.57 11,483 17.07 7.8329
2024-10-15 2024-09-30 13F AMAZON COM Stock 023135106 52,640 0 0.00 9,808 -3.58 6.3763
2024-07-24 2024-06-30 13F AMAZON COM Stock 023135106 52,640 2,060 4.07 10,173 11.50 6.2092
2024-04-18 2024-03-31 13F AMAZON COM Stock 023135106 50,580 0 0.00 9,124 18.71 5.6547
2024-01-16 2023-12-31 13F AMAZON COM Stock 023135106 50,580 0 0.00 7,685 19.54 5.1633
2023-10-10 2023-09-30 13F AMAZON COM Stock 023135106 50,580 0 0.00 6,430 -2.49 4.7114
2023-07-17 2023-06-30 13F AMAZON COM Stock 023135106 50,580 0 0.00 6,594 26.21 4.7790
2023-04-20 2023-03-31 13F AMAZON Stock 023135106 50,580 0 0.00 5,224 22.98 4.0031
2023-01-24 2022-12-31 13F AMAZON COM Stock 023135106 50,580 -3,600 -6.64 4,249 -30.61 3.6212
2022-10-31 2022-09-30 13F AMAZON COM Stock 023135106 54,180 80 0.15 6,122 6.54 5.2687
2022-07-29 2022-06-30 13F AMAZON COM Stock 023135106 54,100 51,400 1,903.70 5,746 -34.72 4.5314
2022-04-26 2022-03-31 13F AMAZON COM INC COM Stock 023135106 2,700 0 0.00 8,802 -2.23 5.7101
2022-01-10 2021-12-31 13F AMAZON COM Stock 023135106 2,700 0 0.00 9,003 1.50 5.4246
2021-10-26 2021-09-30 13F AMAZON COM INC COM Stock 023135106 2,700 0 0.00 8,870 -4.50 5.5121
2021-07-27 2021-06-30 13F AMAZON COM INC COM COM 023135106 2,700 0 0.00 9,288 11.18 5.5673
2021-05-06 2021-03-31 13F/A-2 AMAZON COM Stock 023135106 2,700 50 1.89 8,354 -3.21 6.0122
2021-05-05 2021-03-31 13F/A-1 AMAZON COM Stock 023135106 2,700 0 8,354 6.0601
2021-04-16 2021-03-31 13F AMAZON COM Stock 023135106 2,650 0 5,167 6.0156
2022-04-25 2020-12-31 13F/A-1 AMAZON COM INC COM Stock 023135106 2,650 100 3.92 8,631 7.50 6.6482
2021-01-27 2020-12-31 13F AMAZON COM COM 023135106 2,650 100 8,631 6.0848
2020-10-23 2020-09-30 13F AMAZON COM COM 023135106 2,550 0 0.00 8,029 14.13 6.9602
2020-07-28 2020-06-30 13F AMAZON COM COM 023135106 2,550 0 0.00 7,035 41.49 6.9199
2020-04-14 2020-03-31 13F AMAZON COM COM 023135106 2,550 -100 -3.77 4,972 1.53 6.3670
2020-01-16 2019-12-31 13F AMAZON COM COM 023135106 2,650 0 0.00 4,897 6.46 4.7715
2019-10-11 2019-09-30 13F AMAZON COM COM 023135106 2,650 0 0.00 4,600 -8.33 4.9911
2019-07-15 2019-06-30 13F AMAZON COM 023135106 2,650 0 0.00 5,018 6.34 5.3838
2019-04-24 2019-03-31 13F AMAZON COM 023135106 2,650 50 1.92 4,719 20.85 4.9067
2019-02-01 2018-12-31 13F AMAZON COM COM 023135106 2,600 100 4.00 3,905 -22.01 4.4564
2018-10-23 2018-09-30 13F AMAZON COM COM 023135106 2,500 0 0.00 5,007 17.84 4.7957
2018-07-30 2018-06-30 13F AMAZON COM COM 023135106 2,500 0 0.00 4,249 17.44 4.0870
2018-04-27 2018-03-31 13F AMAZON COM COM 023135106 2,500 -1,994 -44.37 3,618 -31.15 3.6175
2018-02-21 2017-12-31 13F AMAZON COM 023135106 4,494 -735 -14.06 5,255 20.03 4.7311
2016-10-27 2016-09-30 13F AMAZON COM COM 023135106 5,229 10 0.19 4,378 17.22 4.7174
2016-08-05 2016-06-30 13F AMAZON COM COM 023135106 5,219 671 14.75 3,735 38.33 4.1181
2016-04-21 2016-03-31 13F AMAZON COM COM 023135106 4,548 1,728 61.28 2,700 41.66 2.9727
2016-01-29 2015-12-31 13F AMAZON COM COM 023135106 2,820 -25 -0.88 1,906 30.91 1.9548
2015-11-12 2015-09-30 13F AMAZON COM COM 023135106 2,845 100 3.64 1,456 22.15 1.5418
2015-08-04 2015-06-30 13F AMAZON COM COM 023135106 2,745 -175 -5.99 1,192 9.66 1.1320
2015-04-27 2015-03-31 13F AMAZON COM COM 023135106 2,920 2,920 6.38 1,087 -8.81 0.9656
2015-01-28 2014-12-31 13F AMAZON COM COM 023135106 0 -2,850 -100.00 0 -100.00
2014-10-16 2014-09-30 13F AMAZON COM COM 023135106 2,850 0 0.00 919 -0.76 0.8474
2014-08-04 2014-06-30 13F AMAZON COM COM 023135106 2,850 0 0.00 926 -3.44 0.8178
2014-05-07 2014-03-31 13F/A-1 AMAZON COM COM 023135106 2,850 -50 -1.72 959 -17.04 0.9068
2014-05-02 2014-03-31 13F AMAZON COM COM 023135106 2,900 1,156
2014-03-25 2013-12-31 13F AMAZON COM COM 023135106 2,900 2,900 1,156 1.1217
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.