BAMCO INC /NY/ — 13F Holdings & Portfolio
CIK 1017918 · latest 13F-HR filed 2026-08-14
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 and exited 35; 162 existing positions rose in reported value and 99 fell.
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.
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
Portfolio charts
Latest quarter's book, what changed, and how the portfolio has evolved across filings.
Portfolio map
Q2 26SPCX37.4% · newTSLA7.9% · +5%MSCI2.7% · +19%ACGL2.3% · -5%H2.1% · +15%SHOP1.9% · +136%SPOT1.7% · +84%GWRE1.7% · +36%SCHW1.6% · +56%RRR1.6% · +22%IDXX1.6% · +21%CHH1.5% · +21%IT1.5% · +28%FDS1.4% · +12%MTN1.3% · +30%KNSL1.3% · +31%VRSK1.3% · +87%BIRK1.0% · +57%FIGS0.9% · 0%CSGP0.9% · +33%ONON0.9% · +74%NVDA0.9% · +2%MORN0.8% · +361%AMZN0.7% · +51%IBKR0.6% · +19%VRT0.5% · -17%TSM0.5% · +5%APH0.4% · -4%WELL0.4% · -8%IOT0.4% · +54%ABNB0.4% · +22%SITE0.3% · -2%FPS0.3% · -13%PWR0.3% · -3%EQIX0.3% · -20%LOAR0.3% · +7%GOOGL0.3% · +43%AVGO0.3% · -2%GOOG0.3% · +290%PRI0.3% · -22%MTD0.3% · +4%LVS0.3% · +209%LLY0.3% · +65%TOL0.2% · +8%BXDC0.2% · newNPO0.2% · +2%HEI.A0.2% · +34%MRNA0.2% · newNOVT0.2% · -7%DDOG0.2% · -14%CBRE0.2% · -9%META0.2% · -9%LLYVK0.2% · -19%GDS0.2% · -8%ARGX0.2% · -1%MAC0.2% · +22%HLI0.2% · -18%NET0.2% · +3%MTH0.2% · newPLD0.2% · -26%
Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.
Sector mix
% of 13F valueSectors from each company's SIC code; funds and ETFs grouped separately.
Biggest buys and sells
Q1 26 → Q2 26Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.
13F assets and positions
4 quartersTotal reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.
Top positions over time
reported valueThe eight largest current positions, valued at each quarter end.
Concentration
top 10 = 60.9%Cumulative share of the portfolio held in the largest N positions.
Firm Profile & Key People
As of the firm’s regulatory filing dated May 27, 2026.
Assets Under Management
$39.51B
Discretionary
$39.51B
Employees
221
Accounts
45
Address
767 5TH AVE
48TH FLOOR
NEW YORK, NY 10153-0023
48TH FLOOR
NEW YORK, NY 10153-0023
Phone
(212) 583-2000
| Name | Title / Status | Ownership | Type |
|---|---|---|---|
| BARON CAPITAL GROUP, INC. Control | SHAREHOLDER since Jan 1987 | 75% or more | Domestic Entity |
| BARON, DAVID, ROBERT Control | DIRECTOR & CO-PRESIDENT since Jul 2017 | Less than 5% | Individual |
| BARON, MICHAEL, R. Control | DIRECTOR & CO-PRESIDENT since Jul 2017 | Less than 5% | Individual |
| BARON, RONALD, STEPHEN Control | FOUNDER & CEO since Jan 1987 | Less than 5% | Individual |
| BEASLEY, LOUIS, BARRETT Control | MANAGING DIRECTOR, CHIEF COMPLIANCE OFFICER since Sep 2014 | Less than 5% | Individual |
| BRONSTEIN, RICHARD Control | DIRECTOR since Jul 2017 | Less than 5% | Individual |
| GREENBERG, CLIFFORD Control | SENIOR MANAGING DIRECTOR & CO-CIO since Feb 2020 | Less than 5% | Individual |
| NAGLER, ANITA, MARIE Control | DIRECTOR since Feb 2008 | Less than 5% | Individual |
| PATALINO, PATRICK, MICHAEL Control | SENIOR MANAGING DIRECTOR, CHIEF OPERATING OFFICER since Aug 2025 | Less than 5% | Individual |
| PECK, ANDREW, JOSHUA Control | SENIOR MANAGING DIRECTOR & CO-CIO since Feb 2020 | Less than 5% | Individual |
| ROBBINS, SUSAN, JAN Control | SENIOR MANAGING DIRECTOR since Jan 1987 | Less than 5% | Individual |
| TREGLIA, KRISTINE, F Control | MANAGING DIRECTOR, CHIEF LEGAL OFFICER since Aug 2025 | Less than 5% | Individual |
| BARON, DAVID, ROBERT Control Indirect owner via BARON CAPITAL GROUP, INC. | SHAREHOLDER since Jul 2017 | 25–50% | Individual |
| BARON, MICHAEL, R. Control Indirect owner via BARON CAPITAL GROUP, INC. | SHAREHOLDER since Jul 2017 | 25–50% | Individual |
Ownership & leadership changes · 13 filings with changes since May 31, 2012
From the firm’s regulatory filings, newest first. Dates are filing dates: a filing that no longer lists someone does not say when they left.
May 27, 2026 filing
- ChangedBARON, RONALD, STEPHEN · title CHAIRMAN & CEO → FOUNDER & CEO
- ChangedBEASLEY, LOUIS, BARRETT · title CHIEF COMPLIANCE OFFICER → MANAGING DIRECTOR, CHIEF COMPLIANCE OFFICER
- ChangedGREENBERG, CLIFFORD · title DIRECTOR & SENIOR VICE PRESIDENT & CO-CIO → SENIOR MANAGING DIRECTOR & CO-CIO
- ChangedPATALINO, PATRICK, MICHAEL · title SENIOR VICE PRESIDENT,CHIEF OPERATING OFFICER → SENIOR MANAGING DIRECTOR, CHIEF OPERATING OFFICER
- ChangedPECK, ANDREW, JOSHUA · title DIRECTOR, SENIOR VICE PRESIDENT & CO-CIO → SENIOR MANAGING DIRECTOR & CO-CIO
- ChangedROBBINS, SUSAN, JAN · title DIRECTOR & VICE PRESIDENT → SENIOR MANAGING DIRECTOR
- ChangedTREGLIA, KRISTINE, F · title VICE PRESIDENT, CHIEF LEGAL OFFICER → MANAGING DIRECTOR, CHIEF LEGAL OFFICER
Oct 30, 2025 filing
- No longer listedSTERN, RACHEL, REBECCA · DIRECTOR, SR. VICE PRESIDENT & CHIEF OPERATING OFFICER · Less than 5% · control person · listed since Apr 2018
- Listed againTREGLIA, KRISTINE, F · VICE PRESIDENT, CHIEF LEGAL OFFICER · Less than 5% · control person
- ChangedPATALINO, PATRICK, MICHAEL · title SENIOR VICE PRESIDENT, GENERAL COUNSEL & SECRETARY → SENIOR VICE PRESIDENT,CHIEF OPERATING OFFICER
May 21, 2025 filing
- No longer listedMARTINSON, LINDA, S · DIRECTOR · Less than 5% · control person · listed since Jan 1987
- No longer listedWONG, PEGGY, C · DIRECTOR · Less than 5% · control person · listed since Jun 1987
- AddedBARON, DAVID, ROBERT · SHAREHOLDER · 25–50% · indirect via BARON CAPITAL GROUP, INC. · control person
- AddedBARON, MICHAEL, R. · SHAREHOLDER · 25–50% · indirect via BARON CAPITAL GROUP, INC. · control person
- ChangedBARON, DAVID, ROBERT · title DIRECTOR & VICE PRESIDENT → DIRECTOR & CO-PRESIDENT
- ChangedBARON, MICHAEL, R. · title DIRECTOR & VICE PRESIDENT → DIRECTOR & CO-PRESIDENT
- ChangedPATALINO, PATRICK, MICHAEL · title VICE PRESIDENT, GENERAL COUNSEL & SECRETARY → SENIOR VICE PRESIDENT, GENERAL COUNSEL & SECRETARY
Sep 25, 2024 filing
- ChangedMARTINSON, LINDA, S · title DIRECTOR, PRESIDENT & CHIEF OPERATING OFFICER → DIRECTOR
- ChangedSTERN, RACHEL, REBECCA · title DIRECTOR → DIRECTOR, SR. VICE PRESIDENT & CHIEF OPERATING OFFICER
- ChangedWONG, PEGGY, C · title VICE PRESIDENT, CHIEF FINANCIAL OFFICER & TREASURER → DIRECTOR
May 25, 2021 filing
- No longer listedBARON, RONALD, STEPHEN · CHAIRMAN/CEO/DIRECTOR/SHAREHOLDER · 75% or more · indirect via BARON CAPITAL GROUP, INC. · control person · listed since Jan 1987
May 18, 2020 filing
- AddedBRONSTEIN, RICHARD · DIRECTOR · Less than 5% · control person
- AddedSTERN, RACHEL, REBECCA · DIRECTOR · Less than 5% · control person
- ChangedBARON, DAVID, ROBERT · title RESEARCH ANALYST → DIRECTOR & VICE PRESIDENT
- ChangedBARON, MICHAEL, R. · title RESEARCH ANALYST → DIRECTOR & VICE PRESIDENT
- ChangedBARON, RONALD, STEPHEN · title CHAIRMAN, CEO AND CIO → CHAIRMAN & CEO
- ChangedGREENBERG, CLIFFORD · title DIRECTOR & SENIOR VICE PRESIDENT → DIRECTOR & SENIOR VICE PRESIDENT & CO-CIO
- ChangedPECK, ANDREW, JOSHUA · title SENIOR VICE PRESIDENT → DIRECTOR, SENIOR VICE PRESIDENT & CO-CIO
May 28, 2019 filing
- ChangedBARON, DAVID, ROBERT · now a control person
- ChangedBARON, MICHAEL, R. · now a control person
- ChangedPECK, ANDREW, JOSHUA · now a control person
May 22, 2017 filing
- No longer listedCOHN, LAWRENCE, J · VICE PRESIDENT & CHIEF INFORMATION OFFICER · Less than 5% · listed since Mar 2008
Nov 14, 2014 filing
- No longer listedDODDS, CHRISTOPHER, VINCENT · DIRECTOR · Less than 5% · control person · listed since Jul 2007
Oct 15, 2014 filing
- No longer listedTREGLIA, KRISTINE, F · VICE PRESIDENT, ACTING CHIEF COMPLIANCE OFFICER · Less than 5% · listed since Jul 2014
- AddedBEASLEY, LOUIS, BARRETT · CHIEF COMPLIANCE OFFICER · Less than 5% · control person
Older changes (4 more filings)
Aug 13, 2014 filing
- No longer listedHEANEY, GRETTA, JANE · VICE PRESIDENT & CHIEF COMPLIANCE OFFICER · Less than 5% · listed since May 2004
- AddedTREGLIA, KRISTINE, F · VICE PRESIDENT, ACTING CHIEF COMPLIANCE OFFICER · Less than 5%
May 22, 2014 filing
- No longer listedBARON, JUDITH · SHAREHOLDER · 25–50% · indirect via BARON CAPITAL GROUP, INC. · control person · listed since May 1999
- No longer listedBARON, JUDITH · SHAREHOLDER · 25–50% · control person · listed since May 1999
Dec 12, 2013 filing
- AddedBARON, JUDITH · SHAREHOLDER · 25–50% · indirect via BARON CAPITAL GROUP, INC. · control person
- AddedBARON, JUDITH · SHAREHOLDER · 25–50% · control person
- ChangedDODDS, CHRISTOPHER, VINCENT · now a control person
- ChangedGREENBERG, CLIFFORD · now a control person
- ChangedMARTINSON, LINDA, S · now a control person
- ChangedNAGLER, ANITA, MARIE · now a control person
- ChangedPATALINO, PATRICK, MICHAEL · now a control person
- ChangedROBBINS, SUSAN, JAN · now a control person
- ChangedWONG, PEGGY, C · title CHIEF FINANCIAL OFFICER & TREASURER → VICE PRESIDENT, CHIEF FINANCIAL OFFICER & TREASURER; now a control person
May 31, 2012 filing (earliest on record)
- ListedBARON CAPITAL GROUP, INC. · SHAREHOLDER · 75% or more · control person
- ListedBARON, DAVID, ROBERT · RESEARCH ANALYST · Less than 5%
- ListedBARON, MICHAEL, R. · RESEARCH ANALYST · Less than 5%
- ListedBARON, RONALD, STEPHEN · CHAIRMAN, CEO AND CIO · Less than 5% · control person
- ListedBARON, RONALD, STEPHEN · CHAIRMAN/CEO/DIRECTOR/SHAREHOLDER · 75% or more · indirect via BARON CAPITAL GROUP, INC. · control person
- ListedCOHN, LAWRENCE, J · VICE PRESIDENT & CHIEF INFORMATION OFFICER · Less than 5%
- ListedDODDS, CHRISTOPHER, VINCENT · DIRECTOR · Less than 5%
- ListedGREENBERG, CLIFFORD · DIRECTOR & SENIOR VICE PRESIDENT · Less than 5%
- ListedHEANEY, GRETTA, JANE · VICE PRESIDENT & CHIEF COMPLIANCE OFFICER · Less than 5%
- ListedMARTINSON, LINDA, S · DIRECTOR, PRESIDENT & CHIEF OPERATING OFFICER · Less than 5%
- ListedNAGLER, ANITA, MARIE · DIRECTOR · Less than 5%
- ListedPATALINO, PATRICK, MICHAEL · VICE PRESIDENT, GENERAL COUNSEL & SECRETARY · Less than 5%
- ListedPECK, ANDREW, JOSHUA · SENIOR VICE PRESIDENT · Less than 5%
- ListedROBBINS, SUSAN, JAN · DIRECTOR & VICE PRESIDENT · Less than 5%
- ListedWONG, PEGGY, C · CHIEF FINANCIAL OFFICER & TREASURER · Less than 5%
Quarter-over-quarter changes
Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.
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%
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%
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
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
BAMCO INC /NY/ Holdings (2026-06-30)
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 |
Filer Information
Address
767 FIFTH AVENUE49TH FL
NEW YORK, NY 10153
Phone
(212) 583-2000
Filing Manager
BAMCO INC /NY/
NEW YORK, NY
Signatory
Jane Liang
Chief Financial Officer