# BAMCO INC /NY/

> Institutional holdings reported to the SEC as of Q2 2026 on Form 13F. CIK 1017918. Source: https://holderbook.com/funds/1017918-bamco-inc-ny/

- Reported value: $66.6B
- Positions: 345
- Weight of the ten largest: 60.9%
- Filed: 2026-08-14

A 13F reports long US equity positions only. Short positions, bonds, foreign listings, private holdings and cash are not visible, so this is not the manager's whole book.

## Holdings

| Security | Ticker | Value | Shares | Weight | Quarters held |
|---|---|---|---|---|---|
| SPACE EXPLORATION TECHN CORP | [SPCX](https://holderbook.com/stocks/SPCX/) | $24.9B | 145,775,147 | 37.4% | 1 |
| TESLA INC | [TSLA](https://holderbook.com/stocks/TSLA/) | $5.3B | 12,524,752 | 7.9% | 31 |
| MSCI INC | [MSCI](https://holderbook.com/stocks/MSCI/) | $1.8B | 3,211,753 | 2.7% | 31 |
| ARCH CAP GROUP LTD | [ACGL](https://holderbook.com/stocks/ACGL/) | $1.5B | 15,872,450 | 2.3% | 31 |
| HYATT HOTELS CORP | [H](https://holderbook.com/stocks/H/) | $1.4B | 7,279,087 | 2.1% | 31 |
| SHOPIFY INC | [SHOP](https://holderbook.com/stocks/SHOP/) | $1.3B | 11,155,546 | 1.9% | 27 |
| SPOTIFY TECHNOLOGY S A | [SPOT](https://holderbook.com/stocks/SPOT/) | $1.1B | 2,433,114 | 1.7% | 31 |
| GUIDEWIRE SOFTWARE INC | [GWRE](https://holderbook.com/stocks/GWRE/) | $1.1B | 8,994,456 | 1.7% | 31 |
| SCHWAB CHARLES CORP | [SCHW](https://holderbook.com/stocks/SCHW/) | $1.1B | 11,655,694 | 1.6% | 31 |
| RED ROCK RESORTS INC | [RRR](https://holderbook.com/stocks/RRR/) | $1.1B | 16,391,131 | 1.6% | 31 |
| IDEXX LABS INC | [IDXX](https://holderbook.com/stocks/IDXX/) | $1.0B | 1,976,778 | 1.6% | 31 |
| CHOICE HOTELS INTL INC | [CHH](https://holderbook.com/stocks/CHH/) | $1.0B | 9,328,354 | 1.5% | 31 |
| GARTNER INC | [IT](https://holderbook.com/stocks/IT/) | $985.2M | 7,601,009 | 1.5% | 31 |
| FACTSET RESH SYS INC | [FDS](https://holderbook.com/stocks/FDS/) | $966.5M | 4,200,856 | 1.5% | 31 |
| VAIL RESORTS INC | [MTN](https://holderbook.com/stocks/MTN/) | $890.0M | 6,536,697 | 1.3% | 31 |
| KINSALE CAP GROUP INC | [KNSL](https://holderbook.com/stocks/KNSL/) | $878.6M | 2,663,958 | 1.3% | 31 |
| VERISK ANALYTICS INC | [VRSK](https://holderbook.com/stocks/VRSK/) | $844.3M | 4,702,605 | 1.3% | 31 |
| BIRKENSTOCK HOLDING PLC | [BIRK](https://holderbook.com/stocks/BIRK/) | $634.2M | 14,739,609 | 1.0% | 11 |
| FIGS INC | [FIGS](https://holderbook.com/stocks/FIGS/) | $613.4M | 59,959,449 | 0.9% | 21 |
| COSTAR GROUP INC | [CSGP](https://holderbook.com/stocks/CSGP/) | $612.5M | 21,626,763 | 0.9% | 31 |
| ON HLDG AG | [ONON](https://holderbook.com/stocks/ONON/) | $599.7M | 16,929,770 | 0.9% | 18 |
| NVIDIA CORPORATION | [NVDA](https://holderbook.com/stocks/NVDA/) | $593.3M | 2,965,306 | 0.9% | 31 |
| MORNINGSTAR INC | [MORN](https://holderbook.com/stocks/MORN/) | $545.9M | 3,499,146 | 0.8% | 31 |
| AMAZON COM INC | [AMZN](https://holderbook.com/stocks/AMZN/) | $466.3M | 1,956,523 | 0.7% | 31 |
| INTERACTIVE BROKERS GROUP IN | [IBKR](https://holderbook.com/stocks/IBKR/) | $418.4M | 4,807,214 | 0.6% | 14 |
| VERTIV HOLDINGS CO | [VRT](https://holderbook.com/stocks/VRT/) | $328.1M | 979,821 | 0.5% | 26 |
| TAIWAN SEMICONDUCTOR MANUFAC | [TSM](https://holderbook.com/stocks/TSM/) | $318.9M | 667,698 | 0.5% | 31 |
| AMPHENOL CORP | [APH](https://holderbook.com/stocks/APH/) | $281.8M | 1,598,059 | 0.4% | 29 |
| WELLTOWER INC | [WELL](https://holderbook.com/stocks/WELL/) | $279.6M | 1,232,060 | 0.4% | 18 |
| SAMSARA INC | [IOT](https://holderbook.com/stocks/IOT/) | $255.6M | 7,881,752 | 0.4% | 9 |
| AIRBNB INC | [ABNB](https://holderbook.com/stocks/ABNB/) | $251.6M | 1,758,065 | 0.4% | 8 |
| SITEONE LANDSCAPE SUPPLY INC | [SITE](https://holderbook.com/stocks/SITE/) | $232.1M | 2,028,799 | 0.3% | 31 |
| FORGENT POWER SOLUTIONS INC | [FPS](https://holderbook.com/stocks/FPS/) | $227.5M | 4,072,575 | 0.3% | 2 |
| QUANTA SVCS INC | [PWR](https://holderbook.com/stocks/PWR/) | $227.4M | 315,789 | 0.3% | 14 |
| EQUINIX INC | [EQIX](https://holderbook.com/stocks/EQIX/) | $203.9M | 195,637 | 0.3% | 31 |
| LOAR HOLDINGS INC | [LOAR](https://holderbook.com/stocks/LOAR/) | $203.4M | 2,523,332 | 0.3% | 9 |
| ALPHABET INC | [GOOGL](https://holderbook.com/stocks/GOOGL/) | $195.2M | 546,232 | 0.3% | 31 |
| BROADCOM INC | [AVGO](https://holderbook.com/stocks/AVGO/) | $194.4M | 514,536 | 0.3% | 18 |
| ALPHABET INC | [GOOG](https://holderbook.com/stocks/GOOG/) | $191.4M | 541,579 | 0.3% | 31 |
| PRIMERICA INC | [PRI](https://holderbook.com/stocks/PRI/) | $190.8M | 671,453 | 0.3% | 31 |
| METTLER TOLEDO INTERNATIONAL | [MTD](https://holderbook.com/stocks/MTD/) | $176.9M | 138,464 | 0.3% | 31 |
| LAS VEGAS SANDS CORP | [LVS](https://holderbook.com/stocks/LVS/) | $174.8M | 3,784,278 | 0.3% | 19 |
| ELI LILLY & CO | [LLY](https://holderbook.com/stocks/LLY/) | $168.6M | 140,540 | 0.3% | 17 |
| TOLL BROTHERS INC | [TOL](https://holderbook.com/stocks/TOL/) | $166.2M | 1,009,102 | 0.2% | 25 |
| BLACKSTONE DIGITAL INFRASTRU | - | $164.8M | 7,620,555 | 0.2% | 1 |
| ENPRO INC | [NPO](https://holderbook.com/stocks/NPO/) | $150.6M | 399,482 | 0.2% | 7 |
| HEICO CORP NEW | [HEIA](https://holderbook.com/stocks/HEIA/) | $145.1M | 562,662 | 0.2% | 31 |
| MODERNA INC | [MRNA](https://holderbook.com/stocks/MRNA/) | $139.3M | 1,989,386 | 0.2% | 1 |
| NOVANTA INC | [NOVT](https://holderbook.com/stocks/NOVT/) | $138.0M | 850,494 | 0.2% | 31 |
| DATADOG INC | [DDOG](https://holderbook.com/stocks/DDOG/) | $132.4M | 508,356 | 0.2% | 28 |
| CBRE GROUP INC | [CBRE](https://holderbook.com/stocks/CBRE/) | $131.9M | 978,961 | 0.2% | 31 |
| META PLATFORMS INC | [META](https://holderbook.com/stocks/META/) | $131.4M | 233,313 | 0.2% | 31 |
| LIBERTY LIVE HOLDINGS INC | [LLYVK](https://holderbook.com/stocks/LLYVK/) | $131.0M | 1,240,273 | 0.2% | 3 |
| GDS HLDGS LTD | [GDS](https://holderbook.com/stocks/GDS/) | $127.5M | 4,245,033 | 0.2% | 10 |
| ARGENX SE | [ARGX](https://holderbook.com/stocks/ARGX/) | $126.8M | 136,654 | 0.2% | 31 |
| MACERICH CO | [MAC](https://holderbook.com/stocks/MAC/) | $125.9M | 4,999,756 | 0.2% | 10 |
| HOULIHAN LOKEY INC | [HLI](https://holderbook.com/stocks/HLI/) | $116.6M | 869,544 | 0.2% | 31 |
| CLOUDFLARE INC | [NET](https://holderbook.com/stocks/NET/) | $115.7M | 471,598 | 0.2% | 28 |
| MERITAGE HOMES CORP | [MTH](https://holderbook.com/stocks/MTH/) | $112.5M | 1,341,653 | 0.2% | 1 |
| PROLOGIS INC. | [PLD](https://holderbook.com/stocks/PLD/) | $107.1M | 790,347 | 0.2% | 6 |
| JEFFERIES FINANCIAL GROUP IN | [JEF](https://holderbook.com/stocks/JEF/) | $107.0M | 2,141,744 | 0.2% | 19 |
| ADVANCED DRAIN SYS INC DEL | [WMS](https://holderbook.com/stocks/WMS/) | $106.8M | 680,431 | 0.2% | 6 |
| TRANSDIGM GROUP INC | [TDG](https://holderbook.com/stocks/TDG/) | $104.6M | 78,501 | 0.2% | 31 |
| INDIE SEMICONDUCTOR INC | [INDI](https://holderbook.com/stocks/INDI/) | $103.3M | 23,012,611 | 0.2% | 21 |
| REPLIGEN CORP | [RGEN](https://holderbook.com/stocks/RGEN/) | $102.1M | 748,466 | 0.2% | 16 |
| CROWDSTRIKE HLDGS INC | [CRWD](https://holderbook.com/stocks/CRWD/) | $96.5M | 126,394 | 0.1% | 29 |
| HILTON WORLDWIDE HLDGS INC | [HLT](https://holderbook.com/stocks/HLT/) | $96.3M | 291,397 | 0.1% | 15 |
| RBC BEARINGS INC | [RBC](https://holderbook.com/stocks/RBC/) | $96.1M | 149,226 | 0.1% | 31 |
| JBT MAREL CORPORATION | [JBTM](https://holderbook.com/stocks/JBTM/) | $95.8M | 660,557 | 0.1% | 31 |
| DRAFTKINGS INC NEW | [DKNG](https://holderbook.com/stocks/DKNG/) | $95.2M | 3,768,624 | 0.1% | 15 |
| HEARTFLOW INC | [HTFL](https://holderbook.com/stocks/HTFL/) | $94.6M | 3,225,133 | 0.1% | 4 |
| CASELLA WASTE SYS INC | [CWST](https://holderbook.com/stocks/CWST/) | $93.6M | 965,239 | 0.1% | 3 |
| HINGE HEALTH INC | [HNGE](https://holderbook.com/stocks/HNGE/) | $92.8M | 1,117,678 | 0.1% | 5 |
| BROOKFIELD CORP | [BN](https://holderbook.com/stocks/BN/) | $90.8M | 2,132,011 | 0.1% | 15 |
| COGNEX CORP | [CGNX](https://holderbook.com/stocks/CGNX/) | $90.6M | 1,251,099 | 0.1% | 31 |
| RUBRIK INC. | [RBRK](https://holderbook.com/stocks/RBRK/) | $89.5M | 1,115,395 | 0.1% | 3 |
| BILLIONTOONE INC | [BLLN](https://holderbook.com/stocks/BLLN/) | $89.0M | 742,093 | 0.1% | 3 |
| SNOWFLAKE INC | [SNOW](https://holderbook.com/stocks/SNOW/) | $87.0M | 341,931 | 0.1% | 24 |
| AXON ENTERPRISE INC | [AXON](https://holderbook.com/stocks/AXON/) | $86.1M | 153,615 | 0.1% | 18 |
| GAMING & LEISURE P | [GLPI](https://holderbook.com/stocks/GLPI/) | $82.1M | 1,844,141 | 0.1% | 31 |
| MONOLITHIC PWR SYS INC | [MPWR](https://holderbook.com/stocks/MPWR/) | $81.0M | 58,604 | 0.1% | 21 |
| MERCADOLIBRE INC | [MELI](https://holderbook.com/stocks/MELI/) | $79.7M | 46,955 | 0.1% | 31 |
| HEICO CORP NEW | [HEI](https://holderbook.com/stocks/HEI/) | $78.0M | 218,976 | 0.1% | 31 |
| RADNET INC | [RDNT](https://holderbook.com/stocks/RDNT/) | $77.8M | 1,260,992 | 0.1% | 10 |
| FIGMA INC | [FIG](https://holderbook.com/stocks/FIG/) | $77.1M | 4,264,145 | 0.1% | 4 |
| PUBLIC STORAGE | [PSA](https://holderbook.com/stocks/PSA/) | $76.7M | 241,020 | 0.1% | 2 |
| LIBERTY MEDIA CORP DEL | [FWONK](https://holderbook.com/stocks/FWONK/) | $76.1M | 800,000 | 0.1% | 12 |
| BRIGHT HORIZONS FAM SOL IN D | [BFAM](https://holderbook.com/stocks/BFAM/) | $74.8M | 1,055,150 | 0.1% | 31 |
| NU HLDGS LTD | [NU](https://holderbook.com/stocks/NU/) | $74.8M | 5,597,914 | 0.1% | 13 |
| WINGSTOP INC | [WING](https://holderbook.com/stocks/WING/) | $74.6M | 430,165 | 0.1% | 6 |
| MERCURY SYS INC | [MRCY](https://holderbook.com/stocks/MRCY/) | $74.2M | 606,919 | 0.1% | 31 |
| KARMAN HLDGS INC | [KRMN](https://holderbook.com/stocks/KRMN/) | $72.4M | 1,450,878 | 0.1% | 6 |
| ASML HLDG NV | [ASML](https://holderbook.com/stocks/ASML/) | $72.2M | 36,286 | 0.1% | 31 |
| THE BALDWIN INSURANCE GRP IN | [BWIN](https://holderbook.com/stocks/BWIN/) | $72.1M | 2,712,386 | 0.1% | 27 |
| ALIBABA GROUP HLDG LTD | [BABA](https://holderbook.com/stocks/BABA/) | $71.1M | 740,460 | 0.1% | 31 |
| MIRION TECHNOLOGIES INC | [MIR](https://holderbook.com/stocks/MIR/) | $70.0M | 3,906,083 | 0.1% | 4 |
| BLACKSTONE INC | [BX](https://holderbook.com/stocks/BX/) | $69.6M | 591,248 | 0.1% | 18 |
| CRH PLC | [CRH](https://holderbook.com/stocks/CRH/) | $69.5M | 649,916 | 0.1% | 6 |
| AAON INC | [AAON](https://holderbook.com/stocks/AAON/) | $69.1M | 544,402 | 0.1% | 4 |
| DYNATRACE INC | [DT](https://holderbook.com/stocks/DT/) | $68.9M | 1,569,714 | 0.1% | 28 |

## What the disclosed book did

Not the fund's return. This is the change in value of the positions disclosed on Form 13F, had they been left untouched, against SPY over the same quarter ends.

| Quarter | Book | Market | Difference | Priced |
|---|---|---|---|---|
| Q2 2026 | +7.6% | +14.8% | -7.2% | 100% |
| Q1 2026 | -11.9% | -4.6% | -7.3% | 100% |
| Q4 2025 | -1.4% | +2.4% | -3.8% | 100% |
| Q3 2025 | +4.2% | +7.8% | -3.6% | 100% |
| Q2 2025 | +10.0% | +10.5% | -0.5% | 100% |
| Q1 2025 | -10.2% | -4.6% | -5.7% | 100% |
| Q4 2024 | +4.7% | +2.1% | +2.5% | 100% |
| Q3 2024 | +11.5% | +5.4% | +6.0% | 100% |

## Quarter by quarter

| Quarter | Value | Positions |
|---|---|---|
| Q2 2026 | $66.6B | 345 |
| Q1 2026 | $33.1B | 326 |
| Q4 2025 | $36.9B | 327 |
| Q3 2025 | $37.7B | 330 |
| Q2 2025 | $36.9B | 306 |
| Q1 2025 | $34.0B | 314 |
| Q4 2024 | $38.7B | 316 |
| Q3 2024 | $37.7B | 328 |
| Q2 2024 | $34.9B | 329 |
| Q1 2024 | $37.5B | 332 |
| Q4 2023 | $37.5B | 330 |
| Q3 2023 | $34.4B | 334 |