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 2025Q4 — net new, added, trimmed, exited.
New positions34 names
- LLYVKLIBERTY LIVE HOLDINGS INC+1,613,666$134.2M
- SKYSKYLINE CHAMPION CORPORATION+725,542$61.3M
- WAYWAYSTAR HLDG CORP+1,393,634$45.6M
- CWSTCASELLA WASTE SYS INC+446,242$43.7M
- FBINFORTUNE BRANDS HOME & SEC IN+773,799$38.7M
- RKTROCKET COS INC+1,398,360$27.1M
- GLIBKGCI LIBERTY INC+681,440$25.4M
- G2717CCUSHMAN AND WAKEFIELD LTD+1,481,285$24.0M
- CVCOCAVCO INDS INC DEL+37,078$21.9M
- NPNEPTUNE INS HLDGS INC+708,728$20.7M
- ARQTARCUTIS BIOTHERAPEUTICS INC+504,700$14.7M
- BLLNBILLIONTOONE INC+170,000$13.9M
- + 22 more…
Added to122 names
- FDSFACTSET RESH SYS INC+1,069,786$310.4M
- MSCIMSCI INC+361,630$207.5M
- CHHCHOICE HOTELS INTL INC+2,026,679$193.1M
- VTRVENTAS INC+1,048,958$81.2M
- M2029KBIRKENSTOCK HOLDING PLC+1,612,236$65.9M
- BNBROOKFIELD CORP+1,233,637$56.6M
- ABNBAIRBNB INC+301,536$40.9M
- NOVTNOVANTA INC+309,869$36.9M
- AMZNAMAZON COM INC+146,847$33.9M
- HTFLHEARTFLOW INC+1,066,371$31.1M
- H5919CON HLDG AG+658,933$30.6M
- AXONAXON ENTERPRISE INC+49,199$27.9M
- + 110 more…
Trimmed121 names
- GLPIGAMING & LEISURE PPTYS INC−3,285,200$146.8M
- EXKEXACT SCIENCES CORP−1,184,503$120.3M
- MTNVAIL RESORTS INC−892,764$118.6M
- CNSCOHEN & STEERS INC−1,563,311$98.1M
- MTDMETTLER TOLEDO INTERNATIONAL−65,018$90.6M
- VRTVERTIV HOLDINGS CO−525,071$85.1M
- TECHBIO-TECHNE CORP−1,288,824$75.8M
- G0450AARCH CAP GROUP LTD−772,150$74.1M
- PRIPRIMERICA INC−275,697$71.2M
- IDXXIDEXX LABS INC−86,088$58.2M
- KTOSKRATOS DEFENSE & SEC SOLUTIO−723,116$54.9M
- TTDTHE TRADE DESK INC−1,298,598$49.3M
- + 109 more…
Exited37 names
- LLYVK*LIBERTY MEDIA CORP DEL−1,458,910$141.5M
- TREXTREX CO INC−1,589,735$82.1M
- ITGRINTEGER HLDGS CORP−766,055$79.2M
- DUOLDUOLINGO INC−243,708$78.4M
- VNOVORNADO RLTY TR−1,408,487$57.1M
- IRMIRON MTN INC NEW−436,831$44.5M
- DAYCERIDIAN HCM HLDG INC−523,064$36.0M
- DHID R HORTON INC−199,717$33.8M
- BEKEKE HLDGS INC−1,756,357$33.4M
- JBIJANUS INTERNATIONAL GROUP IN−2,750,000$27.1M
- IRTINDEPENDENCE RLTY TR INC−1,467,193$24.0M
- METCRAMACO RES INC−623,058$20.7M
- + 25 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