CIK: 0000010742
Total reported value
$4.8B
Reporting period: 2026-03-31 · Number of holdings: 195
BECK MACK & OLIVER LLC disclosed 195 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $4.8B and a quarterly turnover rate of 26.7%.
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Beck Mack & Oliver LLC's disclosed holdings carry a Herfindahl concentration index of 0.031 — mathematically equivalent to about 33 equally-sized positions, well below its 195 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes vary widely across the portfolio (a coefficient of variation of 2.24), with a handful of outsized bets alongside many smaller positions.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Trim OWL
-32.4% -$68.1M
Trim APO
+0.0% -$92.1M
Trim MSFT
-2.0% -$68.6M
Trim ROP
-29.4% -$45.1M
Add MTDR
-5.2% $25.0M
Trim BX
+5.1% -$71.5M
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | APO | Apollo Global Management INC | Stock-Financials | 6.35% | -0.92% | +0.01% | |
| 2 | ✓ | Alphabet Inc. | Stock-Other | 5.45% | -0.24% | -7.80% | |
| 3 | BX | Blackstone INC | Stock-Financials | 5.36% | -0.66% | +5.10% | |
| 4 | AJG | Arthur J Gallagher & Co | Stock-Financials | 4.75% | +0.62% | +20.88% | |
| 5 | SUNB | Sunbelt Rentals Holdings INC | Stock-Industrials | 4.53% | +4.53% | NEW | |
| 6 | MSFT | Microsoft CORP | Stock-Tech | 4.25% | -0.74% | -1.98% | |
| 7 | FERG | Ferguson Enterprises INC | Stock-Industrials | 4.01% | +0.60% | -1.28% | |
| 8 | SCHW | Schwab (charles) CORP | Stock-Financials | 3.96% | +0.21% | -1.04% | |
| 9 | SGI | Somnigroup International INC | Stock-Consumer Disc | 3.67% | -0.10% | +3.69% | |
| 10 | RDNT | Radnet INC | Stock-Healthcare | 3.65% | -0.54% | -2.02% | |
| 11 | LH | Labcorp Holdings INC | Stock-Healthcare | 3.39% | +0.53% | -1.66% | |
| 12 | ZWS | Zurn Elkay Water Solutions C | Stock-Industrials | 3.23% | +0.20% | -2.45% | |
| 13 | CACC | Credit Acceptance CORP | Stock-Other | 2.70% | +0.20% | -0.44% | |
| 14 | WAT | Waters CORP | Stock-Healthcare | 2.65% | -0.04% | +10.64% | |
| 15 | AXP | American Express Co | Stock-Financials | 2.54% | -0.21% | -0.37% | |
| 16 | ✓ | Hilton Worldwide Holdings Inc. | Stock-Other | 2.47% | — | -3.90% | |
| 17 | ✓ | CoStar Group, Inc. | Stock-Other | 2.43% | -0.29% | +31.56% | |
| 18 | JPM | Jpmorgan Chase & Co | Stock-Financials | 2.35% | +0.03% | -2.33% | |
| 19 | ABT | Abbott Laboratories | Stock-Healthcare | 1.98% | -0.01% | +6.94% | |
| 20 | MTDR | Matador Resources Co | Stock-Energy | 1.77% | +0.67% | -5.15% | |
| 21 | GSAT | Globalstar INC | Stock-Other | 1.53% | +0.27% | -1.93% | |
| 22 | ✓ | Alphabet Inc. | Stock-Other | 1.44% | -0.16% | -13.70% | |
| 23 | RUSHA | Rush Enterprises Inc-cl A | Stock-Consumer Disc | 1.31% | +0.35% | -2.67% | |
| 24 | ROP | Roper Technologies INC | Stock-Tech | 1.19% | -0.68% | -29.40% | |
| 25 | WAB | Wabtec CORP | Stock-Industrials | 1.18% | +0.28% | -0.78% | |
| 26 | JNJ | Johnson & Johnson | Stock-Healthcare | 1.08% | +0.25% | -2.52% | |
| 27 | JEF | Jefferies Financial Group In | Stock-Financials | 1.04% | -0.35% | -0.75% | |
| 28 | MA | Mastercard INC - A | Stock-Financials | 0.99% | — | +0.19% | |
| 29 | OWL | Blue Owl Capital INC | Stock-Financials | 0.99% | -1.12% | -32.39% | |
| 30 | AMZN | Amazon.com INC | Stock-Consumer Disc | 0.98% | — | +10.14% | |
| 31 | BRK-B | Berkshire Hathaway Inc-cl B | Stock-Other | 0.88% | +0.04% | -3.35% | |
| 32 | QCOM | Qualcomm INC | Stock-Tech | 0.88% | -0.13% | +1.14% | |
| 33 | MKL | Markel Group INC | Stock-Financials | 0.77% | -0.07% | -9.21% | |
| 34 | WMT | Walmart INC | Stock-Consumer Staples | 0.74% | +0.15% | -1.43% | |
| 35 | WBD | Warner Bros Discovery INC | Stock-Comm Services | 0.68% | -0.30% | -35.37% | |
| 36 | BN | Brookfield CORP | Stock-Financials | 0.67% | -0.03% | -4.51% | |
| 37 | TEVA | Teva Pharmaceutical-sp Adr | Stock-Healthcare | 0.65% | — | -0.45% | |
| 38 | EPD | Enterprise Products Partners | Stock-Energy | 0.64% | +0.18% | +2.76% | |
| 39 | WMB | Williams Cos INC | Stock-Energy | 0.64% | +0.17% | -0.60% | |
| 40 | UNP | Union Pacific CORP | Stock-Industrials | 0.63% | — | -0.56% | |
| 41 | AAPL | Apple INC | Stock-Tech | 0.61% | +0.03% | -0.75% | |
| 42 | LOW | Lowe's Cos INC | Stock-Consumer Disc | 0.59% | -0.02% | -12.21% | |
| 43 | HUBB | Hubbell INC | Stock-Industrials | 0.49% | — | -0.81% | |
| 44 | ✓ | Enbridge Inc. | Stock-Other | 0.36% | — | -1.28% | |
| 45 | ✓ | Duke Energy Corporation | Stock-Other | 0.34% | — | +0.03% | |
| 46 | ALC | Alcon Inc. | Stock-Healthcare | 0.32% | +0.28% | +674.37% | |
| 47 | NTR | Nutrien LTD | Stock-Materials | 0.28% | — | -3.07% | |
| 48 | ARES | Ares Management CORP - A | Stock-Financials | 0.26% | — | +53.53% | |
| 49 | SYY | Sysco CORP | Stock-Consumer Staples | 0.26% | — | -0.61% | |
| 50 | PKE | Park Aerospace CORP | Stock-Other | 0.24% | -0.02% | -36.67% |
Performance for Q3 2026
+1.7%
Performance Last 4 Quarters
+4.3%
Based on 81% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 195 | $4.8B | 27 | |
| 2025-12-31 | 194 | $5.5B | 11 | |
| 2025-09-30 | 187 | $5.5B | 24 | |
| 2025-06-30 | 189 | $5.2B | 0 | |
| 2025-03-31 | 187 | $5.0B | 100 | |
| 2024-12-31 | 190 | $5.4B | 0 | |
| 2024-09-30 | 177 | $5.1B | 0 | |
| 2024-06-30 | 179 | $4.8B | 0 | |
| 2024-03-31 | 179 | $4.9B | 0 | |
| 2023-12-31 | 183 | $4.3B | 0 | |
| 2023-09-30 | 170 | $3.8B | 0 | |
| 2023-06-30 | 177 | $3.8B | 0 | |
| 2023-03-31 | 171 | $3.5B | 0 | |
| 2022-12-31 | 176 | $3.4B | 0 | |
| 2022-09-30 | 172 | $3.1B | 0 | |
| 2022-06-30 | 177 | $3.3B | 0 | |
| 2022-03-31 | 195 | $4.0B | 0 | |
| 2021-12-31 | 210 | $4.2B | 0 | |
| 2021-09-30 | 218 | $3.9B | 0 | |
| 2021-06-30 | 206 | $3.8B | 100 | |
| 2021-03-31 | 203 | $3.2B | 14 | |
| 2020-12-31 | 202 | $3.0B | 17 | |
| 2020-09-30 | 196 | $2.7B | 11 | |
| 2020-06-30 | 201 | $2.7B | 22 | |
| 2020-03-31 | 190 | $2.2B | 32 | |
| 2019-12-31 | 219 | $3.0B | 10 | |
| 2019-09-30 | 214 | $2.8B | 19 | |
| 2019-06-30 | 224 | $2.8B | 23 | |
| 2019-03-31 | 225 | $2.8B | 18 | |
| 2018-12-31 | 237 | $2.5B | 26 | |
| 2018-09-30 | 240 | $3.1B | 14 | |
| 2018-06-30 | 241 | $3.0B | 14 | |
| 2018-03-31 | 246 | $3.0B | 9 | |
| 2017-12-31 | 246 | $3.0B | 14 | |
| 2017-09-30 | 250 | $3.0B | 10 | |
| 2017-06-30 | 253 | $3.0B | 11 | |
| 2017-03-31 | 246 | $2.9B | 13 | |
| 2016-12-31 | 242 | $2.8B | 11 | |
| 2016-09-30 | 253 | $2.8B | 12 | |
| 2016-06-30 | 339 | $2.8B | 10 | |
| 2016-03-31 | 340 | $2.9B | 12 | |
| 2015-12-31 | 355 | $2.9B | 20 | |
| 2015-09-30 | 402 | $3.3B | 28 | |
| 2015-06-30 | 431 | $3.8B | 11 | |
| 2015-03-31 | 451 | $4.0B | 15 | |
| 2014-12-31 | 450 | $4.1B | 12 | |
| 2014-09-30 | 452 | $4.3B | 10 | |
| 2014-06-30 | 457 | $4.5B | 12 | |
| 2014-03-31 | 435 | $4.3B | 10 | |
| 2013-12-31 | 442 | $4.1B | 28 | |
| 2013-09-30 | 441 | $3.7B | 0 | |
| 2013-06-30 | 441 | $3.7B | — |
Beck Mack & Oliver LLC's most significant position changes for 2026-03-31: Sold out: Ashtead Group PLC; New buy: Sunbelt Rentals Holdings INC (SUNB); New buy: Kinsale Capital Group INC (KNSL); New buy: Marriott International -cl A (MAR); Trim: Blue Owl Capital INC (OWL) — shares -32.39%.
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | MTDR | Matador Resources Co | +0.7% | -5.15% | Trim |
| 2 | AJG | Arthur J Gallagher & Co | +0.6% | +20.88% | Add |
| 3 | FERG | Ferguson Enterprises INC | +0.6% | -1.28% | Trim |
| 4 | LH | Labcorp Holdings INC | +0.5% | -1.66% | Trim |
| 5 | RUSHA | Rush Enterprises Inc-cl A | +0.4% | -2.67% | Trim |
| 6 | ALC | Alcon Inc. | +0.3% | +674.37% | Add |
| 7 | WAB | Wabtec CORP | +0.3% | -0.78% | Trim |
| 8 | GSAT | Globalstar INC | +0.3% | -1.93% | Trim |
| 9 | JNJ | Johnson & Johnson | +0.3% | -2.52% | Trim |
| 10 | SCHW | Schwab (charles) CORP | +0.2% | -1.04% | Trim |
| 11 | ZWS | Zurn Elkay Water Solutions C | +0.2% | -2.45% | Trim |
| 12 | CACC | Credit Acceptance CORP | +0.2% | -0.44% | Trim |
| 13 | EPD | Enterprise Products Partners | +0.2% | +2.76% | Add |
| 14 | WMB | Williams Cos INC | +0.2% | -0.60% | Trim |
| 15 | WMT | Walmart INC | +0.2% | -1.43% | Trim |
| 16 | VZ | Verizon Communications INC | +0.1% | +2.44% | Add |
| 17 | BWIN | Baldwin Insurance Group Inc/ | +0.1% | +47.38% | Add |
| 18 | BRK-B | Berkshire Hathaway Inc-cl B | 0% | -3.35% | Trim |
| 19 | JPM | Jpmorgan Chase & Co | 0% | -2.33% | Trim |
| 20 | AAPL | Apple INC | 0% | -0.75% | Trim |
| 21 | MA | Mastercard INC - A | — | +0.19% | Add |
| 22 | ABT | Abbott Laboratories | 0% | +6.94% | Add |
| 23 | LOW | Lowe's Cos INC | 0% | -12.21% | Trim |
| 24 | PKE | Park Aerospace CORP | 0% | -36.67% | Trim |
| 25 | BN | Brookfield CORP | 0% | -4.51% | Trim |
| 26 | SDHC | Smith Douglas Homes CORP | 0% | +4.18% | Add |
| 27 | WAT | Waters CORP | 0% | +10.64% | Add |
| 28 | KKR | Kkr & Co INC | -0.1% | -22.15% | Trim |
| 29 | DIBS | 1stdibs.com INC | -0.1% | -33.44% | Trim |
| 30 | ADP | Automatic Data Processing | -0.1% | -39.95% | Trim |
| 31 | MKL | Markel Group INC | -0.1% | -9.21% | Trim |
| 32 | FTRE | Fortrea Holdings INC | -0.1% | +17.78% | Add |
| 33 | SGI | Somnigroup International INC | -0.1% | +3.69% | Add |
| 34 | QCOM | Qualcomm INC | -0.1% | +1.14% | Add |
| 35 | ✓ | Alphabet Inc. | -0.2% | -13.70% | Trim |
| 36 | AXP | American Express Co | -0.2% | -0.37% | Trim |
| 37 | ✓ | Alphabet Inc. | -0.2% | -7.80% | Trim |
| 38 | ✓ | CoStar Group, Inc. | -0.3% | +31.56% | Add |
| 39 | WBD | Warner Bros Discovery INC | -0.3% | -35.37% | Trim |
| 40 | JEF | Jefferies Financial Group In | -0.4% | -0.75% | Trim |
| 41 | RDNT | Radnet INC | -0.5% | -2.02% | Trim |
| 42 | BX | Blackstone INC | -0.7% | +5.10% | Add |
| 43 | ROP | Roper Technologies INC | -0.7% | -29.40% | Trim |
| 44 | MSFT | Microsoft CORP | -0.7% | -1.98% | Trim |
| 45 | APO | Apollo Global Management INC | -0.9% | +0.01% | Add |
| 46 | OWL | Blue Owl Capital INC | -1.1% | -32.39% | Trim |
| 47 | ✓ | Ashtead Group PLC | — | EXIT | Sold out |
| 48 | SUNB | Sunbelt Rentals Holdings INC | — | NEW | New buy |
| 49 | KNSL | Kinsale Capital Group INC | — | NEW | New buy |
| 50 | MAR | Marriott International -cl A | — | NEW | New buy |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-05-12 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-02-12 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-11-14 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-08-14 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-05-15 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-02-13 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-11-13 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-08-14 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-05-14 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-02-14 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-11-14 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-08-08 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-05-15 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-02-14 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-02-14 | Amendment | View on EDGAR |
| 2022-09-30 | 2022-11-10 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-08-12 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-05-16 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-01-28 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-11-04 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-07-28 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-05-11 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-02-10 | 13F-HR | View on EDGAR |
| 2020-09-30 | 2020-11-02 | 13F-HR | View on EDGAR |
| 2020-06-30 | 2020-08-10 | 13F-HR | View on EDGAR |
| 2020-03-31 | 2020-05-05 | 13F-HR | View on EDGAR |
| 2019-12-31 | 2020-02-07 | 13F-HR | View on EDGAR |
| 2019-09-30 | 2019-11-06 | 13F-HR | View on EDGAR |
| 2019-06-30 | 2019-08-13 | 13F-HR | View on EDGAR |
| 2019-03-31 | 2019-05-02 | 13F-HR | View on EDGAR |
| 2018-12-31 | 2019-02-04 | 13F-HR | View on EDGAR |
| 2018-09-30 | 2018-10-29 | 13F-HR | View on EDGAR |
| 2018-06-30 | 2018-07-25 | 13F-HR | View on EDGAR |
| 2018-03-31 | 2018-04-25 | 13F-HR | View on EDGAR |
| 2017-12-31 | 2018-02-02 | 13F-HR | View on EDGAR |
| 2017-09-30 | 2017-10-27 | 13F-HR | View on EDGAR |
| 2017-06-30 | 2017-07-26 | 13F-HR | View on EDGAR |
| 2017-03-31 | 2017-04-28 | 13F-HR | View on EDGAR |
| 2016-12-31 | 2017-01-31 | 13F-HR | View on EDGAR |
| 2016-09-30 | 2016-10-28 | 13F-HR | View on EDGAR |
| 2016-06-30 | 2016-07-29 | 13F-HR | View on EDGAR |
| 2016-03-31 | 2016-04-27 | 13F-HR | View on EDGAR |
| 2015-12-31 | 2016-02-01 | 13F-HR | View on EDGAR |
| 2015-09-30 | 2015-11-02 | 13F-HR | View on EDGAR |
| 2015-06-30 | 2015-07-31 | 13F-HR | View on EDGAR |
| 2015-03-31 | 2015-04-28 | 13F-HR | View on EDGAR |
| 2014-12-31 | 2015-01-26 | 13F-HR | View on EDGAR |
| 2014-09-30 | 2014-10-29 | 13F-HR | View on EDGAR |
| 2014-06-30 | 2014-07-31 | 13F-HR | View on EDGAR |
| 2014-03-31 | 2014-04-30 | 13F-HR | View on EDGAR |
| 2013-12-31 | 2014-01-29 | 13F-HR | View on EDGAR |
| 2013-09-30 | 2013-10-28 | Amendment | View on EDGAR |
| 2013-09-30 | 2013-10-28 | 13F-HR | View on EDGAR |
| 2013-06-30 | 2013-07-24 | 13F-HR | View on EDGAR |
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