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BAMCO INC /NY/ — 13F Holdings & Portfolio

CIK 1017918 · latest 13F-HR filed 2026-08-14

Backtest portfolio

BAMCO INC /NY/ manages $66.64B in 13F-reported U.S. long-equity assets across 345 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are SPCX (37.38%), TSLA (7.90%), MSCI (2.70%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 54 new positions, exited 35, added to 162, and trimmed 99.

AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.

Filer Information
Address
767 FIFTH AVENUE
49TH FL
NEW YORK, NY 10153
Phone
(212) 583-2000
Filing Manager
BAMCO INC /NY/
NEW YORK, NY
Signatory
Jane Liang
Chief Financial Officer
Loading holdings…
AUM

$66.64B

Long-equity book

Holdings

345

Distinct positions

Period

2026-06-30

Filed 2026-08-14

Q/Q Activity

+54 / −35 / ↑162 / ↓99

vs 2026-03-31

Firm Profile & Key People
Name Title / Status Ownership Type

Top Adds (vs prior quarter)

  • TESLA INC$831.6M +18.7%
  • SHOPIFY INC$714.1M +127.6%
  • HYATT HOTELS CORP$499.1M +54.7%
  • SPOTIFY TECHNOLOGY S A$477.3M +74.6%
  • MORNINGSTAR INC$417.5M +325.2%
Show all 162 →

Top Trims

  • FIGS INC-$272.2M -30.7%
  • WYNN RESORTS LTD-$109.2M -61.9%
  • FLOOR & DECOR HLDGS INC-$64.7M -99.9%
  • GDS HLDGS LTD-$57.7M -31.2%
  • VENTAS INC-$56.6M -69.4%
Show all 99 →

New Positions

  • SPACE EXPLORATION TECHN CORP$24.91B
  • BLACKSTONE DIGITAL INFRASTRU$164.8M
  • MODERNA INC$139.3M
  • MERITAGE HOMES CORP$112.5M
  • CEREBRAS SYSTEMS INC$65.2M
Show all 54 →

Exited Positions

  • BADGER METER INC$47.6M
  • ALKAMI TECHNOLOGY INC$36.2M
  • CHAMPION HOMES INC$34.9M
  • TAYLOR MORRISON HOME CORP$32.3M
  • VARONIS SYS INC$26.6M
Show all 35 →
All Holdings

Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).

# Issuer Symbol CUSIP Value Weight Shares Type
1 SPACE EXPLORATION TECHN CORP SPCX 84615Q103 $24.91B 37.38% 145,775,147 SH
2 TESLA INC TSLA 88160R101 $5.27B 7.90% 12,524,752 SH
3 MSCI INC MSCI 55354G100 $1.80B 2.70% 3,211,753 SH
4 ARCH CAP GROUP LTD ACGL G0450A105 $1.54B 2.31% 15,872,450 SH
5 HYATT HOTELS CORP H 448579102 $1.41B 2.12% 7,279,087 SH
6 SHOPIFY INC SHOP 82509L107 $1.27B 1.91% 11,155,546 SH
7 SPOTIFY TECHNOLOGY S A SPOT L8681T102 $1.12B 1.68% 2,433,114 SH
8 GUIDEWIRE SOFTWARE INC GWRE 40171V100 $1.11B 1.66% 8,994,456 SH
9 SCHWAB CHARLES CORP SCHW 808513105 $1.08B 1.61% 11,655,694 SH
10 RED ROCK RESORTS INC RRR 75700L108 $1.07B 1.60% 16,391,131 SH
11 IDEXX LABS INC IDXX 45168D104 $1.04B 1.56% 1,976,778 SH
12 CHOICE HOTELS INTL INC CHH 169905106 $1.03B 1.54% 9,328,354 SH
13 GARTNER INC IT 366651107 $985.2M 1.48% 7,601,009 SH
14 FACTSET RESH SYS INC FDS 303075105 $966.5M 1.45% 4,200,856 SH
15 VAIL RESORTS INC MTN 91879Q109 $890.0M 1.34% 6,536,697 SH
16 KINSALE CAP GROUP INC KNSL 49714P108 $878.6M 1.32% 2,663,958 SH
17 VERISK ANALYTICS INC VRSK 92345Y106 $844.3M 1.27% 4,702,605 SH
18 BIRKENSTOCK HOLDING PLC BIRK M2029K104 $634.2M 0.95% 14,739,609 SH
19 FIGS INC FIGS 30260D103 $613.4M 0.92% 59,959,449 SH
20 COSTAR GROUP INC CSGP 22160N109 $612.5M 0.92% 21,626,763 SH
21 ON HLDG AG ONON H5919C104 $599.7M 0.90% 16,929,770 SH
22 NVIDIA CORPORATION NVDA 67066G104 $593.3M 0.89% 2,965,306 SH
23 MORNINGSTAR INC MORN 617700109 $545.9M 0.82% 3,499,146 SH
24 AMAZON COM INC AMZN 023135106 $466.3M 0.70% 1,956,523 SH
25 INTERACTIVE BROKERS GROUP IN IBKR 45841N107 $418.4M 0.63% 4,807,214 SH
26 VERTIV HOLDINGS CO VRT 92537N108 $328.1M 0.49% 979,821 SH
27 TAIWAN SEMICONDUCTOR MANUFAC TSM 874039100 $318.9M 0.48% 667,698 SH
28 AMPHENOL CORP APH 032095101 $281.8M 0.42% 1,598,059 SH
29 WELLTOWER INC WELL 95040Q104 $279.6M 0.42% 1,232,060 SH
30 SAMSARA INC IOT 79589L106 $255.6M 0.38% 7,881,752 SH
31 AIRBNB INC ABNB 009066101 $251.6M 0.38% 1,758,065 SH
32 SITEONE LANDSCAPE SUPPLY INC SITE 82982L103 $232.1M 0.35% 2,028,799 SH
33 FORGENT POWER SOLUTIONS INC FPS 34631F102 $227.5M 0.34% 4,072,575 SH
34 QUANTA SVCS INC PWR 74762E102 $227.4M 0.34% 315,789 SH
35 EQUINIX INC EQIX 29444U700 $203.9M 0.31% 195,637 SH
36 LOAR HOLDINGS INC LOAR 53947R105 $203.4M 0.31% 2,523,332 SH
37 ALPHABET INC GOOGL 02079K305 $195.2M 0.29% 546,232 SH
38 BROADCOM INC AVGO 11135F101 $194.4M 0.29% 514,536 SH
39 ALPHABET INC GOOG 02079K107 $191.4M 0.29% 541,579 SH
40 PRIMERICA INC PRI 74164M108 $190.8M 0.29% 671,453 SH
41 METTLER TOLEDO INTERNATIONAL MTD 592688105 $176.9M 0.27% 138,464 SH
42 LAS VEGAS SANDS CORP LVS 517834107 $174.8M 0.26% 3,784,278 SH
43 ELI LILLY & CO LLY 532457108 $168.6M 0.25% 140,540 SH
44 TOLL BROTHERS INC TOL 889478103 $166.2M 0.25% 1,009,102 SH
45 BLACKSTONE DIGITAL INFRASTRU BXDC 09264B107 $164.8M 0.25% 7,620,555 SH
46 ENPRO INC NPO 29355X107 $150.6M 0.23% 399,482 SH
47 HEICO CORP NEW HEI.A 422806208 $145.1M 0.22% 562,662 SH
48 MODERNA INC MRNA 60770K107 $139.3M 0.21% 1,989,386 SH
49 NOVANTA INC NOVT 67000B104 $138.0M 0.21% 850,494 SH
50 DATADOG INC DDOG 23804L103 $132.4M 0.20% 508,356 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-08-14 $66.64B 345 0001017918-26-000067
2026-03-31 2026-05-15 $33.13B 326 0001017918-26-000043
2025-12-31 2026-02-17 $36.91B 327 0001017918-26-000015
2025-09-30 2025-11-14 $37.71B 330 0001017918-25-000059