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 2024Q4 — net new, added, trimmed, exited.
New positions18 names
- EXPEEXPEDIA GROUP INC+430,454$80.2M
- TTANSERVICETITAN INC+684,222$70.4M
- KRCKILROY RLTY CORP+1,452,331$58.7M
- LYVLIVE NATION ENTERTAINMENT IN+195,000$25.3M
- NPOENPRO INDS INC+140,378$24.2M
- M6191JJFROG LTD+725,000$21.3M
- ANETARISTA NETWORKS INC+168,805$18.7M
- SGMLSIGMA LITHIUM CORPORATION+1,206,714$13.5M
- AHRAMERICAN HEALTHCARE REIT INC+188,959$5.4M
- PTLOPORTILLOS INC+436,710$4.1M
- EWTXEDGEWISE THERAPEUTICS INC+60,000$1.6M
- WYWEYERHAEUSER CO MTN BE+54,548$1.5M
- + 6 more…
Added to93 names
- MACMACERICH CO+2,980,051$59.4M
- EQIXEQUINIX INC+49,454$46.6M
- IDXXIDEXX LABS INC+82,264$34.0M
- RRRRED ROCK RESORTS INC+732,917$33.9M
- CSGPCOSTAR GROUP INC+418,128$29.9M
- IRTINDEPENDENCE RLTY TR INC+1,464,400$29.1M
- EQREQUITY RESIDENTIAL+379,565$27.2M
- JLLJONES LANG LASALLE INC+105,656$26.7M
- DNUTKRISPY KREME INC+2,588,398$25.7M
- BNBROOKFIELD CORP+442,219$25.4M
- VNOVORNADO RLTY TR+531,353$22.3M
- WELLWELLTOWER INC+176,736$22.3M
- + 81 more…
Trimmed151 names
- TSLATESLA INC−349,720$141.2M
- VRTVERTIV HOLDINGS CO−800,000$90.9M
- ALTREURALTAIR ENGR INC−720,342$78.6M
- AKXANSYS INC−196,038$66.1M
- AXONAXON ENTERPRISE INC−99,491$59.1M
- FDSFACTSET RESH SYS INC−122,416$58.8M
- AZPN1USDASPEN TECHNOLOGY INC−214,797$53.6M
- TOLTOLL BROTHERS INC−423,535$53.3M
- ITGARTNER INC−106,181$51.4M
- LENLENNAR CORP−357,720$48.8M
- G4705AICON PLC−219,889$46.1M
- DHID R HORTON INC−282,494$39.5M
- + 139 more…
Exited30 names
- REXRREXFORD INDL RLTY INC−1,526,016$76.8M
- CZRCAESARS ENTERTAINMENT INC NE−1,482,755$61.9M
- PLDPROLOGIS INC.−381,980$48.2M
- AMTAMERICAN TOWER CORP NEW−192,717$44.8M
- INVHINVITATION HOMES INC−905,787$31.9M
- FOXFFOX FACTORY HLDG CORP−500,000$20.8M
- LINELINEAGE INC−261,228$20.5M
- YUMCYUM CHINA HLDGS INC−392,632$17.7M
- AMDADVANCED MICRO DEVICES INC−105,364$17.3M
- COLDAMERICOLD RLTY TR−500,000$14.1M
- FBINFORTUNE BRANDS HOME & SEC IN−106,410$9.5M
- LEGNLEGEND BIOTECH CORP−168,158$8.2M
- + 18 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