Malibu Boats, Inc.
MX ˙ BMV ˙ US56117J1007
SecurityMX:MBUU / Malibu Boats, Inc.
InstitutionRhumbline Advisers
Latest Disclosed Ownership24,377 shares
Latest Disclosed Value $ 631,842
Rhumbline Advisers reports 7.39% decrease in ownership of MBUU / Malibu Boats, Inc.

On May 12, 2026 - Rhumbline Advisers filed a 13F-HR form disclosing ownership of 24,377 shares of Malibu Boats, Inc. (MX:MBUU) valued at $631,842 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 26,323 shares of Malibu Boats, Inc.. This represents a change in shares of -7.39% 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)
2026-05-12 2026-03-31 13F MALIBU BOATS INC COM CL A COM 56117J100 24,377 -1,946 -7.39 632 -14.96 0.0005
2026-02-13 2025-12-31 13F MALIBU BOATS INC COM CL A COM 56117J100 26,323 -2,706 -9.32 743 -21.15 0.0006
2025-11-06 2025-09-30 13F MALIBU BOATS INC COM CL A COM 56117J100 29,029 -1,271 -4.19 942 -0.84 0.0008
2025-08-12 2025-06-30 13F MALIBU BOATS INC COM CL A COM 56117J100 30,300 -1,012 -3.23 950 -1.15 0.0008
2025-05-29 2025-03-31 13F/A-1 MALIBU BOATS INC COM CL A COM 56117J100 31,312 -1,272 -3.90 961 -21.57 0.0009
2025-04-08 2025-03-31 13F MALIBU BOATS INC COM CL A COM 56117J100 31,312 -1,272 961 0.0009
2025-05-29 2024-12-31 13F/A-1 MALIBU BOATS INC COM CL A COM 56117J100 32,584 -122 -0.37 1,225 -3.55 0.0011
2025-01-30 2024-12-31 13F MALIBU BOATS INC COM CL A COM 56117J100 32,584 -122 1,225 0.0011
2024-11-12 2024-09-30 13F MALIBU BOATS INC COM CL A COM 56117J100 32,706 -1,705 -4.95 1,269 5.31 0.0011
2024-08-01 2024-06-30 13F MALIBU BOATS INC COM CL A COM 56117J100 34,411 3,406 10.99 1,206 -10.14 0.0011
2024-05-09 2024-03-31 13F MALIBU BOATS INC COM CL A COM 56117J100 31,005 418 1.37 1,342 -19.99 0.0013
2024-02-08 2023-12-31 13F MALIBU BOATS INC COM CL A COM 56117J100 30,587 -70 -0.23 1,677 11.58 0.0018
2023-11-09 2023-09-30 13F MALIBU BOATS INC COM CL A COM 56117J100 30,657 1,350 4.61 1,503 -12.62 0.0017
2023-08-08 2023-06-30 13F MALIBU BOATS INC COM CL A COM 56117J100 29,307 1,796 6.53 1,719 171,800.00 0.0019
2023-05-11 2023-03-31 13F MALIBU BOATS INC COM CL A COM 56117J100 27,511 880 3.30 2 -99.93 0.0019
2023-02-14 2022-12-31 13F MALIBU BOATS INC COM CL A COM 56117J100 26,631 410 1.56 1,419 12.80 0.0019
2022-11-10 2022-09-30 13F MALIBU BOATS INC COM CL A COM 56117J100 26,221 1,760 7.20 1,258 -2.40 0.0019
2022-08-11 2022-06-30 13F MALIBU BOATS INC COM CL A COM 56117J100 24,461 2,154 9.66 1,289 -0.39 0.0019
2022-05-12 2022-03-31 13F MALIBU BOATS INC COM CL A COM 56117J100 22,307 10 0.04 1,294 -15.54 0.0017
2022-02-10 2021-12-31 13F MALIBU BOATS INC COM CL A COM 56117J100 22,297 -759 -3.29 1,532 -5.02 0.0019
2021-11-12 2021-09-30 13F MALIBU BOATS INC COM CL A COM 56117J100 23,056 900 4.06 1,613 -0.74 0.0022
2021-08-05 2021-06-30 13F MALIBU BOATS INC COM CL A COM 56117J100 22,156 -2,059 -8.50 1,625 -15.76 0.0021
2021-05-06 2021-03-31 13F MALIBU BOATS INC COM CL A COM 56117J100 24,215 -1,718 -6.62 1,929 19.15 0.0026
2021-02-10 2020-12-31 13F MALIBU BOATS INC COM CL A COM 56117J100 25,933 456 1.79 1,619 28.19 0.0022
2020-11-12 2020-09-30 13F MALIBU BOATS INC COM CL A COM 56117J100 25,477 -4,662 -15.47 1,263 -19.35 0.0020
2020-08-13 2020-06-30 13F MALIBU BOATS INC COM CL A COM 56117J100 30,139 1,574 5.51 1,566 90.51 0.0026
2020-05-06 2020-03-31 13F MALIBU BOATS INC COM CL A COM 56117J100 28,565 -6,940 -19.55 822 -43.47 0.0017
2020-02-05 2019-12-31 13F MALIBU BOATS INC COM CL A COM 56117J100 35,505 660 1.89 1,454 36.01 0.0024
2019-10-23 2019-09-30 13F MALIBU BOATS INC COM CL A COM 56117J100 34,845 -125 -0.36 1,069 -21.34 0.0020
2019-08-14 2019-06-30 13F MALIBU BOATS INC COM CL A COM 56117J100 34,970 6,600 23.26 1,359 21.02 0.0026
2019-05-01 2019-03-31 13F MALIBU BOATS INC COM CL A COM 56117J100 28,370 1,421 5.27 1,123 19.72 0.0022
2019-01-31 2018-12-31 13F MALIBU BOATS INC COM CL A COM 56117J100 26,949 9,347 53.10 938 -2.60 0.0020
2018-11-07 2018-09-30 13F MALIBU BOATS INC COM CL A COM 56117J100 17,602 -1,573 -8.20 963 19.78 0.0019
2018-08-06 2018-06-30 13F MALIBU BOATS INC COM CL A COM 56117J100 19,175 745 4.04 804 31.37 0.0016
2018-05-02 2018-03-31 13F MALIBU BOATS INC COM CL A COM 56117J100 18,430 465 2.59 612 14.61 0.0013
2018-02-09 2017-12-31 13F MALIBU BOATS INC COM CL A COM 56117J100 17,965 -2,142 -10.65 534 -16.04 0.0011
2017-11-06 2017-09-30 13F MALIBU BOATS INC COM CL A COM 56117J100 20,107 340 1.72 636 24.46 0.0014
2017-08-02 2017-06-30 13F MALIBU BOATS INC COM CL A COM 56117J100 19,767 160 0.82 511 16.14 0.0012
2017-05-02 2017-03-31 13F MALIBU BOATS INC COM CL A COM 56117J100 19,607 860 4.59 440 22.91 0.0010
2017-01-27 2016-12-31 13F MALIBU BOATS INC COM CL A COM 56117J100 18,747 1,357 7.80 358 38.22 0.0009
2016-11-08 2016-09-30 13F MALIBU BOATS INC COM CL A COM 56117J100 17,390 140 0.81 259 24.52 0.0007
2016-08-11 2016-06-30 13F MALIBU BOATS INC COM CL A COM 56117J100 17,250 150 0.88 208 -25.71 0.0006
2016-05-02 2016-03-31 13F MALIBU BOATS INC A COM 56117J100 17,100 150 0.88 280 1.08 0.0009
2016-02-03 2015-12-31 13F MALIBU BOATS INC A COM 56117J100 16,950 1,660 10.86 277 29.44 0.0009
2015-11-04 2015-09-30 13F MALIBU BOATS INC A COM 56117J100 15,290 705 4.83 214 -26.96 0.0007
2015-08-04 2015-06-30 13F MALIBU BOATS INC A COM 56117J100 14,585 14,585 293 0.0009
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.