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 2025Q2 — net new, added, trimmed, exited.
New positions20 names
- HNGEHINGE HEALTH INC+945,762$48.9M
- BXPBOSTON PROPERTIES INC+571,810$38.6M
- PONYPONY AI INC+1,684,095$22.2M
- ASICATEGRITY SPECIALTY IN CO HO+642,230$13.8M
- SMASMARTSTOP SELF STORAG REIT I+361,372$13.1M
- IRMIRON MTN INC NEW+107,524$11.0M
- HSTHOST HOTELS & RESORTS INC+582,925$9.0M
- VICIVICI PPTYS INC+242,348$7.9M
- BLDRBUILDERS FIRSTSOURCE INC+57,189$6.7M
- VOYGVOYAGER TECHNOLOGIES INC+120,000$4.7M
- ELMEWASHINGTON REAL ESTATE INVT+236,975$3.8M
- UDRUDR INC+88,575$3.6M
- + 8 more…
Added to130 names
- IBKRINTERACTIVE BROKERS GROUP IN+3,284,457$182.0M
- TOLTOLL BROTHERS INC+611,523$69.8M
- IOTSAMSARA INC+1,632,626$64.9M
- MSCIMSCI INC+98,680$56.9M
- CSGPCOSTAR GROUP INC+647,413$52.1M
- LLYLILLY ELI & CO+65,795$51.3M
- ABNBAIRBNB INC+364,499$48.2M
- WYNNWYNN RESORTS LTD+482,570$45.2M
- EQIXEQUINIX INC+53,130$42.3M
- CHHCHOICE HOTELS INTL INC+317,618$40.3M
- DKNGDRAFTKINGS INC NEW+929,997$39.9M
- SPOTSPOTIFY TECHNOLOGY S A+49,367$37.9M
- + 118 more…
Trimmed116 names
- TSLATESLA INC−1,194,335$379.4M
- AKXANSYS INC−657,758$231.0M
- BABAALIBABA GROUP HLDG LTD−574,800$65.2M
- NETCLOUDFLARE INC−328,409$64.3M
- AAPLAPPLE INC−308,395$63.3M
- VRTVERTIV HOLDINGS CO−396,003$50.9M
- MTDMETTLER TOLEDO INTERNATIONAL−41,992$49.3M
- ITGARTNER INC−118,848$48.0M
- DAYCERIDIAN HCM HLDG INC−709,940$39.3M
- LVSLAS VEGAS SANDS CORP−735,372$32.0M
- AMHAMERICAN HOMES 4 RENT−857,687$30.9M
- TDGTRANSDIGM GROUP INC−20,000$30.4M
- + 104 more…
Exited28 names
- UTZUTZ BRANDS INC−3,250,000$45.8M
- JDJD.COM INC−873,239$35.9M
- AVBAVALONBAY CMNTYS INC−165,285$35.5M
- UNHUNITEDHEALTH GROUP INC−56,890$29.8M
- EXREXTRA SPACE STORAGE INC−194,207$28.8M
- CHDNCHURCHILL DOWNS INC−208,427$23.1M
- BASECOUCHBASE INC−1,395,158$22.0M
- KRCKILROY RLTY CORP−659,304$21.6M
- LENLENNAR CORP−184,914$21.2M
- EXPEEXPEDIA GROUP INC−110,979$18.7M
- DNUTKRISPY KREME INC−3,645,959$17.9M
- ANETARISTA NETWORKS INC−184,499$14.3M
- + 16 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