Rapid7, Inc.
US ˙ NasdaqGM ˙ US7534221046

SecurityRPD / Rapid7, Inc.
InstitutionFox Run Management, L.l.c.
Latest Disclosed Ownership18,760 shares
Latest Disclosed Value $ 102,242
Fox Run Management, L.l.c. ownership in RPD / Rapid7, Inc.

On May 12, 2026 - Fox Run Management, L.l.c. filed a 13F-HR form disclosing ownership of 18,760 shares of Rapid7, Inc. (US:RPD) valued at $103,368 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 0 shares of Rapid7, Inc.. The current value of the position is $143,795 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)
2026-05-12 2026-03-31 13F RAPID7 COM 753422104 18,760 18,760 102 0.0179
2026-02-11 2025-12-31 13F RAPID7 COM 753422104 0 -21,245 -100.00 0 -100.00
2025-11-12 2025-09-30 13F RAPID7 COM 753422104 21,245 21,245 398 0.0621
2024-11-12 2024-09-30 13F RAPID7 COM 753422104 0 -27,773 -100.00 0 -100.00
2024-08-13 2024-06-30 13F RAPID7 COM 753422104 27,773 17,626 173.71 1,201 141.45 0.2259
2024-05-13 2024-03-31 13F RAPID7 COM 753422104 10,147 4,814 90.27 498 63.49 0.1073
2024-02-13 2023-12-31 13F RAPID7 COM 753422104 5,333 5,333 305 0.0777
2023-11-07 2023-09-30 13F RAPID7 COM 753422104 0 -7,468 -100.00 0 -100.00
2023-08-11 2023-06-30 13F RAPID7 COM 753422104 7,468 1,876 33.55 338 32.03 0.0951
2023-05-12 2023-03-31 13F RAPID7 COM 753422104 5,592 -17,505 -75.79 257 -67.35 0.0836
2023-02-07 2022-12-31 13F RAPID7 COM 753422104 23,097 23,097 785 0.3151
2020-05-08 2020-03-31 13F RAPID7 COM 753422104 0 -3,665 -100.00 0 -100.00
2020-02-14 2019-12-31 13F RAPID7 COM 753422104 3,665 -3,975 -52.03 205 -40.92 0.1650
2019-10-15 2019-09-30 13F/A-1 RAPID7 COM 753422104 7,640 7,640 347 0.3159
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.