Griffon Corporation
US ˙ NYSE ˙ US3984331021

SecurityGFF / Griffon Corporation
InstitutionAmundi
Latest Disclosed Ownership9,049 shares
Latest Disclosed Value $ 657,681
Amundi reports 27.49% increase in ownership of GFF / Griffon Corporation

On May 15, 2026 - Amundi filed a 13F-HR form disclosing ownership of 9,049 shares of Griffon Corporation (US:GFF) valued at $657,681 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 7,098 shares of Griffon Corporation. This represents a change in shares of 27.49% during the quarter. The current value of the position is $779,481 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)
2026-05-15 2026-03-31 13F GRIFFON COM 398433102 9,049 1,951 27.49 658 25.86 0.0001
2026-02-17 2025-12-31 13F GRIFFON COM 398433102 7,098 159 2.29 523 -1.69 0.0001
2025-11-14 2025-09-30 13F GRIFFON COM 398433102 6,939 436 6.70 531 5.36 0.0002
2025-08-13 2025-06-30 13F GRIFFON COM 398433102 6,503 -9,900 -60.35 505 -55.87 0.0002
2025-05-15 2025-03-31 13F GRIFFON COM 398433102 16,403 -3,606 -18.02 1,143 -20.86 0.0004
2025-02-07 2024-12-31 13F GRIFFON COM 398433102 20,009 12,811 177.98 1,444 195.09 0.0005
2024-11-13 2024-09-30 13F GRIFFON COM 398433102 7,198 -46,144 -86.51 490 -85.52 0.0002
2024-08-14 2024-06-30 13F GRIFFON COM 398433102 53,342 -33,036 -38.25 3,377 -40.03 0.0013
2024-05-15 2024-03-31 13F GRIFFON COM 398433102 86,378 16,821 24.18 5,632 37.31 0.0024
2024-02-14 2023-12-31 13F GRIFFON COM 398433102 69,557 64,299 1,222.88 4,101 1,871.63 0.0018
2023-11-14 2023-09-30 13F GRIFFON COM 398433102 5,258 -873 -14.24 208 -16.47 0.0001
2023-08-14 2023-06-30 13F GRIFFON COM 398433102 6,131 6,131 250 0.0001
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.