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 2024Q3 — net new, added, trimmed, exited.
New positions18 names
- VNOVORNADO RLTY TR+1,912,359$75.3M
- CZRCAESARS ENTERTAINMENT INC NE+1,482,755$61.9M
- BLDRBUILDERS FIRSTSOURCE INC+187,444$36.3M
- JDJD.COM INC+808,508$32.3M
- DUOLDUOLINGO INC+91,512$25.8M
- LINELINEAGE INC+261,228$20.5M
- GCMGGCM GROSVENOR INC+1,750,000$19.8M
- TWFGTWFG INC+728,748$19.8M
- IRMIRON MTN INC NEW+159,114$18.9M
- ABNBAIRBNB INC+134,000$17.0M
- ADCAGREE RLTY CORP+95,040$7.2M
- BRXBRIXMOR PPTY GROUP INC+255,165$7.1M
- + 6 more…
Added to90 names
- AVGOBROADCOM INC+465,030$80.2M
- GDSGDS HLDGS LTD+3,397,592$69.3M
- EQIXEQUINIX INC+50,913$45.2M
- BNBROOKFIELD CORP+750,726$39.9M
- LOWLOWES COS INC+121,058$32.8M
- MACMACERICH CO+1,494,145$27.3M
- IBTAIBOTTA INC+401,431$24.7M
- MTNVAIL RESORTS INC+136,328$23.8M
- FIGSFIGS INC+3,342,755$22.9M
- LPXLOUISIANA PAC CORP+204,828$22.0M
- WELLWELLTOWER INC+164,685$21.1M
- CBRECBRE GROUP INC+165,838$20.6M
- + 78 more…
Trimmed157 names
- TSLATESLA INC−587,907$153.8M
- WSTWEST PHARMACEUTICAL SVSC INC−279,326$83.8M
- ITGARTNER INC−161,535$81.9M
- AMTAMERICAN TOWER CORP NEW−349,770$81.3M
- FDSFACTSET RESH SYS INC−174,443$80.2M
- PDDPINDUODUO INC−520,740$70.2M
- WYNNWYNN RESORTS LTD−633,296$60.7M
- IDXXIDEXX LABS INC−112,079$56.6M
- EQREQUITY RESIDENTIAL−728,559$54.2M
- FNDFLOOR & DECOR HLDGS INC−425,729$52.9M
- NVDANVIDIA CORPORATION−358,891$43.6M
- IBPINSTALLED BLDG PRODS INC−168,757$41.6M
- + 145 more…
Exited19 names
- 82710MSILK RD MED INC−1,279,115$34.6M
- BIDUBAIDU INC−396,819$34.3M
- SPTSPROUT SOCIAL INC−750,000$26.8M
- EWCZEUROPEAN WAX CTR INC−2,000,000$19.9M
- DHDEFINITIVE HEALTHCARE CORP−3,491,471$19.1M
- MRVLMARVELL TECHNOLOGY INC−191,401$13.4M
- MCKMCKESSON CORP−10,800$6.3M
- TXG10X GENOMICS INC−314,862$6.1M
- IRTCIRHYTHM TECHNOLOGIES INC−46,500$5.0M
- SUISUN CMNTYS INC−33,944$4.1M
- HLNEHAMILTON LANE INC−27,279$3.4M
- RVNCEURREVANCE THERAPEUTICS INC−1,023,663$2.6M
- + 7 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