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 2023Q2 — net new, added, trimmed, exited.
New positions10 names
- 98156QWORLD WRESTLING ENTMT INC+181,412$19.7M
- 000380ABCAM PLC+429,419$10.5M
- TNLTRAVEL PLUS LEISURE CO+107,764$4.3M
- BSXBOSTON SCIENTIFIC CORP+78,000$4.2M
- IEMGISHARES INC+69,800$3.4M
- SKTTANGER FACTORY OUTLET CTRS I+140,025$3.1M
- ACLXARCELLX INC+40,000$1.3M
- NUNU HLDGS LTD+100,000$789K
- PINSPINTEREST INC+8,192$224K
- SMCIUSDSUPER MICRO COMPUTER INC+525$131K
Added to166 names
- BABAALIBABA GROUP HLDG LTD+458,517$38.2M
- DLRDIGITAL RLTY TR INC+320,908$36.5M
- MSCIMSCI INC+72,355$34.0M
- IBPINSTALLED BLDG PRODS INC+187,565$26.3M
- SCHWSCHWAB CHARLES CORP+429,853$24.4M
- TSLATESLA INC+89,919$23.5M
- NEOGNEOGEN CORP+1,074,462$23.4M
- FIGSFIGS INC+2,695,357$22.3M
- BAHBOOZ ALLEN HAMILTON HLDG COR+187,024$20.9M
- EQIXEQUINIX INC+26,556$20.8M
- BZKANZHUN LIMITED+1,371,223$20.6M
- HHYATT HOTELS CORP+174,915$20.0M
- + 154 more…
Trimmed112 names
- TSMTAIWAN SEMICONDUCTOR MFG LTD−637,463$64.3M
- ITGARTNER INC−76,862$26.9M
- CZRCAESARS ENTERTAINMENT INC NE−485,962$24.8M
- CNSCOHEN & STEERS INC−376,974$21.9M
- VEEVVEEVA SYS INC−102,407$20.2M
- TSTENARIS S A−566,958$17.0M
- RIVNRIVIAN AUTOMOTIVE INC−968,101$16.1M
- DEIDOUGLAS EMMETT INC−1,275,966$16.0M
- SBACSBA COMMUNICATIONS CORP NEW−61,801$14.3M
- LBRDKLIBERTY BROADBAND CORP−175,068$14.0M
- BWINBRP GROUP INC−549,625$13.6M
- EPAMEPAM SYS INC−58,550$13.2M
- + 100 more…
Exited27 names
- 92672LVIEWRAY INC−5,100,929$17.6M
- HLMNHILLMAN SOLUTIONS CORP−2,000,000$16.8M
- 0C3ENDEAVOR GROUP HLDGS INC−543,194$13.0M
- G34142FIFTH WALL ACQUISITN CORP II−1,250,000$12.8M
- MXCTMAXCYTE INC−1,987,904$9.8M
- HLLY/WSHOLLEY INC−2,500,000$6.9M
- 74349UPROMETHEUS BIOSCIENCES INC−42,750$4.6M
- M8744TTABOOLA.COM LTD−1,473,053$4.0M
- 457679INNOVID CORP−2,830,000$4.0M
- ASNDASCENDIS PHARMA A/S−35,306$3.8M
- FISFIDELITY NATL INFORMATION SV−56,972$3.1M
- OPCHOPTION CARE HEALTH INC−77,000$2.4M
- + 15 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