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 2023Q3 — net new, added, trimmed, exited.
New positions12 names
- FWONKLIBERTY MEDIA CORP DEL+1,200,000$74.8M
- SSENTINELONE INC+1,735,000$29.3M
- LLYVK*LIBERTY MEDIA CORP DEL+891,511$28.6M
- FOXFFOX FACTORY HLDG CORP+275,000$27.2M
- FWONALIBERTY MEDIA CORP DEL+266,176$15.0M
- TKOTKO GROUP HOLDINGS INC+169,889$14.3M
- LM0CLIBERTY MEDIA CORP DEL+500,000$12.7M
- M7518JODDITY TECH LTD+349,517$9.9M
- DRHDIAMONDROCK HOSPITALITY CO+481,480$3.9M
- PCORPROCORE TECHNOLOGIES INC+51,877$3.4M
- DUOLDUOLINGO INC+236$39K
- ARMARM HOLDINGS PLC+700$37K
Added to131 names
- H5919CON HLDG AG+2,145,318$59.7M
- MRNAMODERNA INC+418,269$43.2M
- DNUTKRISPY KREME INC+3,439,948$42.9M
- RRRRED ROCK RESORTS INC+962,841$39.5M
- INDIINDIE SEMICONDUCTOR INC+5,193,775$32.7M
- NVDANVIDIA CORPORATION+70,597$30.7M
- SPOTSPOTIFY TECHNOLOGY S A+197,571$30.6M
- NUNU HLDGS LTD+4,190,135$30.4M
- DLRDIGITAL RLTY TR INC+231,109$28.0M
- EQIXEQUINIX INC+34,374$25.0M
- MORNMORNINGSTAR INC+98,191$23.0M
- DHID R HORTON INC+177,745$19.1M
- + 119 more…
Trimmed122 names
- TSMTAIWAN SEMICONDUCTOR MFG LTD−1,073,460$93.3M
- BNBROOKFIELD CORP−1,190,644$37.2M
- GTMZOOMINFO TECHNOLOGIES INC−2,110,236$34.6M
- PENNPENN NATL GAMING INC−1,298,955$29.8M
- KNSLKINSALE CAP GROUP INC−70,911$29.4M
- JDJD.COM INC−1,002,052$29.2M
- SBACSBA COMMUNICATIONS CORP NEW−141,974$28.4M
- CRWDCROWDSTRIKE HLDGS INC−165,901$27.8M
- ILMNILLUMINA INC−200,733$27.6M
- AMTAMERICAN TOWER CORP NEW−150,518$24.8M
- ITGARTNER INC−63,209$21.7M
- PSAPUBLIC STORAGE−81,681$21.5M
- + 110 more…
Exited21 names
- FWONKUSDLIBERTY MEDIA CORP DEL−1,200,000$90.3M
- LSXMKUSDLIBERTY MEDIA CORP DEL−625,000$20.5M
- 531229LIBERTY MEDIA CORP DEL−295,711$20.0M
- 98156QWORLD WRESTLING ENTMT INC−181,412$19.7M
- TSTENARIS S A−470,067$14.1M
- 000380ABCAM PLC−429,419$10.5M
- EAELECTRONIC ARTS INC−78,821$10.2M
- 92259NVELO3D INC−4,337,125$9.4M
- LBRDALIBERTY BROADBAND CORP−75,000$6.0M
- 11284VBROOKFIELD RENEWABLE CORP−159,034$5.0M
- IEMGISHARES INC−69,800$3.4M
- ABTABBOTT LABS−24,362$2.7M
- + 9 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