Asset Manager · CIK 0001017918
Ron Baron
Baron Capital / BAMCO
Ron Baron runs Baron Capital / BAMCO, an asset manager overseeing $36.91B in disclosed equity holdings (SEC CIK 0001017918). The latest 13F filing (2025Q4) discloses 327 positions across 9 sectors, with the largest positions in TSLA, ARCH CAP GROUP LTD and MSCI. On a mark-to-market basis the tracked portfolio has declined 7.8% over the past year. OpenStocks tracks 40 consecutive 13F filings for this manager — every position change, new entry, and exit is logged below.
Portfolio
$36.91B
Positions
327
Quarter
2025Q4
Filings tracked
40
Capital flow per quarter
BuysSellsNet
Latest · 2025Q4
-$342M
Lifetime buys
$21.59B
Lifetime sells
$28.45B
Quarter activity
What changed in 2023Q1 — net new, added, trimmed, exited.
New positions16 names
- WYNNWYNN RESORTS LTD+419,413$46.9M
- CZRCAESARS ENTERTAINMENT INC NE+833,301$40.7M
- PWRQUANTA SVCS INC+216,686$36.1M
- SITMSITIME CORP+204,394$29.1M
- BZKANZHUN LIMITED+1,098,453$20.9M
- IBKRINTERACTIVE BROKERS GROUP IN+207,000$17.1M
- 11284VBROOKFIELD RENEWABLE CORP+116,634$4.1M
- FRFIRST INDL RLTY TR INC+66,192$3.5M
- MUFGMITSUBISHI UFJ FINL GROUP IN+544,010$3.5M
- EXKEXACT SCIENCES CORP+35,000$2.4M
- STEPSTEPSTONE GROUP INC+79,700$1.9M
- SHOSUNSTONE HOTEL INVS INC NEW+105,049$1.0M
- + 4 more…
Added to133 names
- SCHWSCHWAB CHARLES CORP+915,388$47.9M
- TSMTAIWAN SEMICONDUCTOR MFG LTD+433,498$40.3M
- RGENREPLIGEN CORP+212,374$35.8M
- DEIDOUGLAS EMMETT INC+2,885,603$35.6M
- CPNGCOUPANG INC+2,087,031$33.4M
- MGMMGM RESORTS INTERNATIONAL+746,504$33.2M
- WELLWELLTOWER INC+454,453$32.6M
- JBIJANUS INTERNATIONAL GROUP IN+3,000,000$29.6M
- FIGSFIGS INC+4,622,779$28.6M
- ETWOGBPE2OPEN PARENT HOLDINGS INC+4,886,792$28.4M
- LVSLAS VEGAS SANDS CORP+491,603$28.2M
- EGPEASTGROUP PPTYS INC+169,379$28.0M
- + 121 more…
Trimmed141 names
- BIDUBAIDU INC−414,157$62.5M
- IBPINSTALLED BLDG PRODS INC−449,262$51.2M
- SBACSBA COMMUNICATIONS CORP NEW−190,805$49.8M
- ARGXARGENX SE−115,331$43.0M
- SHOPSHOPIFY INC−824,371$39.5M
- TREXTREX CO INC−790,063$38.5M
- GOOGALPHABET INC−334,360$34.8M
- ITGARTNER INC−102,330$33.3M
- TFXTELEFLEX INCORPORATED−121,896$30.9M
- SITESITEONE LANDSCAPE SUPPLY INC−213,931$29.3M
- FISFIDELITY NATL INFORMATION SV−477,935$26.0M
- AXONAXON ENTERPRISE INC−105,500$23.7M
- + 129 more…
Exited31 names
- PGNYPROGYNY INC−1,163,928$36.3M
- 33616CFIRST REP BK SAN FRANCISCO C−244,477$29.8M
- 29788TE2OPEN PARENT HOLDINGS INC−4,886,792$28.7M
- 47103NJANUS INTERNATIONAL GROUP IN−3,000,000$28.6M
- CDNACAREDX INC−2,058,339$23.5M
- INGNINOGEN INC−976,644$19.2M
- SHWSHERWIN WILLIAMS CO−79,157$18.8M
- 67079ANUVEI CORPORATION−705,000$17.9M
- G29018DLOCAL LTD−958,234$14.9M
- BVBRIGHTVIEW HLDGS INC−2,096,786$14.4M
- WOOFPETCO HEALTH & WELLNESS CO I−1,308,754$12.4M
- SPGSIMON PPTY GROUP INC NEW−62,490$7.3M
- + 19 more…
Recent transactions
Last 20 moves
SOLD
ALEXANDRIA REAL ESTATE EQ IN
−20,104
~$83.34 · 2025Q4
2026-02-17
ADD
AXON ENTERPRISE INC
+49,199
~$567.93 · 2025Q4
2026-02-17
ADD
CHOICE HOTELS INTL INC
+2,026,679
~$95.26 · 2025Q4
2026-02-17
SOLD
CIDARA THERAPEUTICS INC
−17,500
~$95.76 · 2025Q4
2026-02-17
SOLD
COMMUNITY HEALTH SYS INC NEW
−100
~$3.21 · 2025Q4
2026-02-17
TRIM
KRATOS DEFENSE & SEC SOLUTIO
−723,116
~$75.91 · 2025Q4
2026-02-17
SOLD
LIBERTY MEDIA CORP DEL
−1,458,910
~$96.97 · 2025Q4
2026-02-17
ADD
MIRION TECHNOLOGIES INC
+150,000
~$23.42 · 2025Q4
2026-02-17
TRIM
WYNN RESORTS LTD
−118,268
~$120.33 · 2025Q4
2026-02-17
NEW
ISHARES TR
+51,896
~$74.94 · 2025Q4
2026-02-17
SOLD
JANUS INTERNATIONAL GROUP IN
−2,750,000
~$9.87 · 2025Q4
2026-02-17