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 portfolio (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 returned 13.0% over the past year. OpenStocks tracks 40 consecutive quarterly snapshots 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
$25.46B
Lifetime sells
$29.55B
Quarter activity
What changed in 2023Q4 — net new, added, trimmed, exited.
New positions18 names
- M2029KBIRKENSTOCK HOLDING PLC+2,934,001$143.0M
- PDDPINDUODUO INC+504,774$73.9M
- AAONAAON INC+192,699$14.2M
- LULUFAX HOLDING LTD+4,606,220$14.1M
- SPGSIMON PPTY GROUP INC NEW+64,132$9.1M
- SUISUN CMNTYS INC+49,625$6.6M
- VKTXVIKING THERAPEUTICS INC+310,067$5.8M
- NVONOVO-NORDISK A S+55,247$5.7M
- GPCRSTRUCTURE THERAPEUTICS INC+118,333$4.8M
- SYKSTRYKER CORPORATION+14,000$4.2M
- IMVTIMMUNOVANT INC+59,000$2.5M
- VGTVANGUARD WORLD FDS+3,396$1.6M
- + 6 more…
Added to126 names
- AMTAMERICAN TOWER CORP NEW+243,853$52.6M
- MTNVAIL RESORTS INC+198,801$42.4M
- FOXFFOX FACTORY HLDG CORP+625,000$42.2M
- EQREQUITY RESIDENTIAL+449,654$27.5M
- RRRRED ROCK RESORTS INC+501,891$26.8M
- NUNU HLDGS LTD+3,024,935$25.2M
- BIDUBAIDU INC+188,697$22.5M
- LVSLAS VEGAS SANDS CORP+407,785$20.1M
- CHHCHOICE HOTELS INTL INC+176,171$20.0M
- CZRCAESARS ENTERTAINMENT INC NE+412,634$19.3M
- MSFTMICROSOFT CORP+50,486$19.0M
- M7518JODDITY TECH LTD+407,899$19.0M
- + 114 more…
Trimmed133 names
- VACMARRIOTT VACATIONS WORLDWIDE−1,281,447$108.8M
- ITGARTNER INC−230,195$103.8M
- BABAALIBABA GROUP HLDG LTD−1,055,759$81.8M
- G85158STONECO LTD−2,913,790$52.5M
- SBACSBA COMMUNICATIONS CORP NEW−191,257$48.5M
- TSMTAIWAN SEMICONDUCTOR MFG LTD−406,925$42.3M
- MRNAMODERNA INC−419,369$41.7M
- DXCMDEXCOM INC−321,358$39.9M
- TRUTRANSUNION−580,254$39.9M
- BNBROOKFIELD CORP−921,478$37.0M
- NVDANVIDIA CORPORATION−59,942$29.7M
- BFAMBRIGHT HORIZONS FAM SOL IN D−308,573$29.1M
- + 121 more…
Exited22 names
- SKINTHE BEAUTY HEALTH COMPANY−5,318,352$32.0M
- ETWOGBPE2OPEN PARENT HOLDINGS INC−6,000,000$27.2M
- 54975PLUFAX HOLDING LTD−18,416,696$19.5M
- JDJD.COM INC−613,835$17.9M
- GTMZOOMINFO TECHNOLOGIES INC−1,065,834$17.5M
- LM0CLIBERTY MEDIA CORP DEL−500,000$12.7M
- ARWRARROWHEAD PHARMACEUTICALS IN−156,619$4.2M
- CUBECUBESMART−91,008$3.5M
- TNLTRAVEL PLUS LEISURE CO−55,964$2.1M
- VICIVICI PPTYS INC−60,900$1.8M
- PODDINSULET CORP−9,565$1.5M
- PCTYPAYLOCITY HLDG CORP−5,153$936K
- + 10 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