The Boston Beer Company, Inc.
US ˙ NYSE ˙ US1005571070

SecuritySAM / The Boston Beer Company, Inc.
InstitutionQuadrant Capital Group Llc
Latest Disclosed Ownership861 shares
Latest Disclosed Value $ 198,375
Quadrant Capital Group Llc reports 46.68% increase in ownership of SAM / The Boston Beer Company, Inc.

On May 13, 2026 - Quadrant Capital Group Llc filed a 13F-HR/A form disclosing ownership of 861 shares of The Boston Beer Company, Inc. (US:SAM) valued at $198,374 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 587 shares of The Boston Beer Company, Inc.. This represents a change in shares of 46.68% during the quarter. The current value of the position is $140,997 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)
2026-05-13 2026-03-31 13F/A-1 BOSTON BEER CL A 100557107 861 274 46.68 198 73.68 0.0059
2026-05-11 2026-03-31 13F BOSTON BEER CL A 100557107 861 274 49 0.0369
2026-02-12 2025-12-31 13F BOSTON BEER CL A 100557107 587 -125 -17.56 115 -24.00 0.0035
2025-11-13 2025-09-30 13F BOSTON BEER CL A 100557107 712 712 151 0.0049
2025-08-13 2025-06-30 13F BOSTON BEER CL A 100557107 0 -1,014 -100.00 0 -100.00
2025-05-13 2025-03-31 13F BOSTON BEER CL A 100557107 1,014 1,012 50,600.00 242 0.0090
2025-02-13 2024-12-31 13F BOSTON BEER CL A 100557107 2 1 100.00 1 0.0000
2024-11-12 2024-09-30 13F BOSTON BEER CL A 100557107 1 -33 -97.06 0 -100.00 0.0000
2024-08-12 2024-06-30 13F BOSTON BEER CL A 100557107 34 12 54.55 10 66.67 0.0008
2024-05-15 2024-03-31 13F BOSTON BEER CL A 100557107 22 -3 -12.00 7 -25.00 0.0005
2024-02-08 2023-12-31 13F BOSTON BEER CL A 100557107 25 -5 -16.67 9 -27.27 0.0007
2023-11-14 2023-09-30 13F BOSTON BEER CL A 100557107 30 -31 -50.82 12 -38.89 0.0012
2023-08-10 2023-06-30 13F BOSTON BEER CL A 100557107 61 -24 -28.24 19 -33.33 0.0019
2023-05-11 2023-03-31 13F BOSTON BEER CL A 100557107 85 53 165.62 28 170.00 0.0029
2023-02-13 2022-12-31 13F BOSTON BEER CL A 100557107 32 -5 -13.51 11 -16.67 0.0012
2022-11-10 2022-09-30 13F BOSTON BEER CL A 100557107 37 -84 -69.42 12 -67.57 0.0016
2022-08-09 2022-06-30 13F BOSTON BEER CL A 100557107 121 39 47.56 37 19.35 0.0050
2022-05-06 2022-03-31 13F BOSTON BEER CL A 100557107 82 11 15.49 31 -13.89 0.0038
2022-02-01 2021-12-31 13F BOSTON BEER CL A 100557107 71 -86 -54.78 36 -55.00 0.0043
2021-11-12 2021-09-30 13F BOSTON BEER CL A 100557107 157 85 118.06 80 9.59 0.0112
2021-08-09 2021-06-30 13F BOSTON BEER CL A 100557107 72 40 125.00 73 87.18 0.0106
2021-05-12 2021-03-31 13F BOSTON BEER CL A 100557107 32 10 45.45 39 77.27 0.0063
2021-02-16 2020-12-31 13F BOSTON BEER CL A 100557107 22 4 22.22 22 37.50 0.0041
2020-11-13 2020-09-30 13F BOSTON BEER CL A 100557107 18 1 5.88 16 77.78 0.0035
2020-08-13 2020-06-30 13F BOSTON BEER CL A 100557107 17 -154 -90.06 9 -85.71 0.0020
2020-05-15 2020-03-31 13F Boston Beer Com 100557107 171 102 147.83 63 142.31 0.0105
2020-03-19 2019-12-31 13F/A-1 Boston Beer Com 100557107 69 0 0.00 26 4.00 0.0031
2020-02-03 2019-12-31 13F Boston Beer Com 100557107 69 0 26 87.8574
2019-10-24 2019-09-30 13F Boston Beer COM 100557107 69 0 0.00 25 -3.85 0.0038
2019-07-24 2019-06-30 13F Boston Beer COM 100557107 69 -108 -61.02 26 -49.02 0.0041
2019-04-29 2019-03-31 13F Boston Beer COM 100557107 177 177 51 0.0090
2017-01-11 2016-12-31 13F Boston Beer Inc Cl A COM 100557107 0 -39 -100.00 0 -100.00
2016-10-25 2016-09-30 13F Boston Beer Inc Cl A COM 100557107 39 0 0.00 6 0.00 0.0039
2016-07-28 2016-06-30 13F Boston Beer Inc Cl A COM 100557107 39 39 6 0.0041
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.