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Built from publicly disclosed institutional and insider activity. Informational purposes only - not investment advice.OpenStocks · v0.1
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  1. Home/
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  3. Ron Baron (Baron Capital / BAMCO)
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Asset Manager · CIK 0001017918

Ron Baron

Baron Capital / BAMCO
Share
  • Large Fund

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.

Track Ron's filingsView holdings↓
Portfolio
$36.91B
Positions
327
Quarter
2025Q4
Filings tracked
40
1Y+13.0%Since filing+110.9%Full performance →
Quarter
2025Q42025Q32025Q22025Q12024Q42024Q32024Q22024Q12023Q42023Q32023Q22023Q1

Holdings

Sorted by value · 2025Q2
1 / 5
75 of 306
1
TSLATESLA INC
Consumer Cyclical·Auto Manufacturers
11.21%
of portfolio
Number of shares
13,018,798 sh
Holdings current value
$4.14B
Avg closing price
$304.15
+31.7%
Last action
Trimmed 0.2%
2025Q4
Current $400.62
2
G0450A105ARCH CAP GROUP LTD
4.87%
of portfolio
Number of shares
19,727,230 sh
Holdings current value
$1.80B
Avg closing price
$41.90
Last action
Trimmed 3.8%
2025Q4
Current —
3
CSGPCOSTAR GROUP INC
Real Estate·Real Estate Services
4.29%
of portfolio
Number of shares
19,679,935 sh
Holdings current value
$1.58B
Avg closing price
$91.42
-56.6%
Last action
Added 1.2%
2025Q4
Current $39.72
4
ITGARTNER INC
Technology·Information Technology Services
4.00%
of portfolio
Number of shares
3,652,761 sh
Holdings current value
$1.48B
Avg closing price
$116.73
+32.5%
Last action
Trimmed 2.9%
2025Q4
Current $154.62
5
GWREGUIDEWIRE SOFTWARE INC
Technology·Software - Application
3.57%
of portfolio
Number of shares
5,589,520 sh
Holdings current value
$1.32B
Avg closing price
$65.03
+115.8%
Last action
Trimmed 0.4%
2025Q4
Current $140.36
6
MSCIMSCI INC
Financial Services·Financial Data & Stock Exchanges
3.39%
of portfolio
Number of shares
2,170,333 sh
Holdings current value
$1.25B
Avg closing price
$231.43
+145.7%
Last action
Added 20.0%
2025Q4
Current $568.55
7
IDXXIDEXX LABS INC
Healthcare·Diagnostics & Research
2.96%
of portfolio
Number of shares
2,032,620 sh
Holdings current value
$1.09B
Avg closing price
$104.10
+466.1%
Last action
Trimmed 4.1%
2025Q4
Current $589.25
8
FDSFACTSET RESH SYS INC
Financial Services·Financial Data & Stock Exchanges
2.71%
of portfolio
Number of shares
2,231,916 sh
Holdings current value
$998.29M
Avg closing price
$212.07
+9.7%
Last action
Added 92.1%
2025Q4
Current $232.73
9
MTNVAIL RESORTS INC
Consumer Cyclical·Resorts & Casinos
2.33%
of portfolio
Number of shares
5,475,549 sh
Holdings current value
$860.37M
Avg closing price
$152.03
-12.4%
Last action
Trimmed 14.0%
2025Q4
Current $133.22
10
KNSLKINSALE CAP GROUP INC
Financial Services·Insurance - Property & Casualty
2.31%
of portfolio
Number of shares
1,763,794 sh
Holdings current value
$853.50M
Avg closing price
$84.46
+327.2%
Last action
Trimmed 0.4%
2025Q4
Current $360.78
11
HHYATT HOTELS CORP
Consumer Cyclical·Lodging
2.25%
of portfolio
Number of shares
5,955,212 sh
Holdings current value
$831.65M
Avg closing price
$67.76
+154.5%
Last action
Trimmed 0.2%
2025Q4
Current $172.48
12
SPOTSPOTIFY TECHNOLOGY S A
Communication Services·Internet Content & Information
1.95%
of portfolio
Number of shares
937,323 sh
Holdings current value
$719.25M
Avg closing price
$264.41
+102.9%
Last action
Added 0.9%
2025Q4
Current $536.61
13
SCHWSCHWAB CHARLES CORP
Financial Services·Capital Markets
1.74%
of portfolio
Number of shares
7,051,368 sh
Holdings current value
$643.37M
Avg closing price
$35.45
+160.3%
Last action
Trimmed 1.0%
2025Q4
Current $92.28
14
RRRRED ROCK RESORTS INC
Consumer Cyclical·Resorts & Casinos
1.73%
of portfolio
Number of shares
12,269,004 sh
Holdings current value
$638.36M
Avg closing price
$33.63
+69.2%
Last action
Added 2.1%
2025Q4
Current $56.91
15
CHHCHOICE HOTELS INTL INC
Consumer Cyclical·Lodging
1.72%
of portfolio
Number of shares
4,990,652 sh
Holdings current value
$633.21M
Avg closing price
$73.55
+62.1%
Last action
Added 68.4%
2025Q4
Current $119.19
16
NVDANVIDIA CORPORATION
Technology·Semiconductors
1.24%
of portfolio
Number of shares
2,889,282 sh
Holdings current value
$456.48M
Avg closing price
$142.81
+41.2%
Last action
Added 0.1%
2025Q4
Current $201.68
17
PRIPRIMERICA INC
Financial Services·Insurance - Life
1.18%
of portfolio
Number of shares
1,588,874 sh
Holdings current value
$434.83M
Avg closing price
$44.69
+510.7%
Last action
Trimmed 14.8%
2025Q4
Current $272.89
18
MORNMORNINGSTAR INC
Financial Services·Financial Data & Stock Exchanges
1.10%
of portfolio
Number of shares
1,295,326 sh
Holdings current value
$406.64M
Avg closing price
$117.66
+56.6%
Last action
Trimmed 11.8%
2025Q4
Current $184.28
19
VRSKVERISK ANALYTICS INC
Industrials·Consulting Services
1.03%
of portfolio
Number of shares
1,214,330 sh
Holdings current value
$378.26M
Avg closing price
$110.27
+61.5%
Last action
Added 7.2%
2025Q4
Current $178.07
20
GLPIGAMING & LEISURE PPTYS INCREIT
Real Estate·REIT - Specialty
0.93%
of portfolio
Number of shares
7,365,805 sh
Holdings current value
$343.84M
Avg closing price
$32.44
+47.1%
Last action
Trimmed 30.8%
2025Q4
Current $47.73
21
FIGSFIGS INC
Consumer Cyclical·Apparel Manufacturing
0.92%
of portfolio
Number of shares
59,974,407 sh
Holdings current value
$338.26M
Avg closing price
$7.14
+126.4%
Last action
Added 0.0%
2025Q4
Current $16.17
22
VRTVERTIV HOLDINGS CO
Industrials·Electrical Equipment & Parts
0.89%
of portfolio
Number of shares
2,570,600 sh
Holdings current value
$330.09M
Avg closing price
$13.22
+2225.3%
Last action
Trimmed 17.0%
2025Q4
Current $307.34
23
SHOPSHOPIFY INC
Technology·Software - Application
0.83%
of portfolio
Number of shares
2,664,940 sh
Holdings current value
$307.40M
Avg closing price
$100.58
+30.4%
Last action
Added 0.1%
2025Q4
Current $131.15
24
MTDMETTLER TOLEDO INTERNATIONAL
Healthcare·Diagnostics & Research
0.76%
of portfolio
Number of shares
238,933 sh
Holdings current value
$280.68M
Avg closing price
$345.85
+287.6%
Last action
Trimmed 21.4%
2025Q4
Current $1341
25
IRDMIRIDIUM COMMUNICATIONS INC
Communication Services·Telecom Services
0.69%
of portfolio
Number of shares
8,377,907 sh
Holdings current value
$252.76M
Avg closing price
$18.33
+128.3%
Last action
Trimmed 5.5%
2025Q4
Current $41.85
26
AMZNAMAZON COM INC
Consumer Cyclical·Internet Retail
0.64%
of portfolio
Number of shares
1,078,330 sh
Holdings current value
$236.57M
Avg closing price
$201.71
+24.2%
Last action
Added 15.8%
2025Q4
Current $250.56
27
SITESITEONE LANDSCAPE SUPPLY INC
Industrials·Industrial Distribution
0.64%
of portfolio
Number of shares
1,941,817 sh
Holdings current value
$234.84M
Avg closing price
$94.03
+53.5%
Last action
Added 3.3%
2025Q4
Current $144.35
28
IBKRINTERACTIVE BROKERS GROUP IN
Financial Services·Capital Markets
0.63%
of portfolio
Number of shares
4,198,424 sh
Holdings current value
$232.63M
Avg closing price
$63.76
+28.2%
Last action
Added 0.8%
2025Q4
Current $81.71
29
M2029K104BIRKENSTOCK HOLDING PLC
0.60%
of portfolio
Number of shares
4,477,403 sh
Holdings current value
$220.20M
Avg closing price
$46.40
Last action
Added 56.3%
2025Q4
Current —
30
H5919C104ON HLDG AG
0.58%
of portfolio
Number of shares
4,139,974 sh
Holdings current value
$215.49M
Avg closing price
$35.38
Last action
Added 18.9%
2025Q4
Current —
31
HLIHOULIHAN LOKEY INC
Financial Services·Capital Markets
0.56%
of portfolio
Number of shares
1,146,143 sh
Holdings current value
$206.25M
Avg closing price
$46.69
+248.1%
Last action
Trimmed 0.5%
2025Q4
Current $162.50
32
METAMETA PLATFORMS INC
Communication Services·Internet Content & Information
0.55%
of portfolio
Number of shares
273,059 sh
Holdings current value
$201.54M
Avg closing price
$244.55
+181.6%
Last action
Added 1.9%
2025Q4
Current $688.55
33
CBRECBRE GROUP INC
Real Estate·Real Estate Services
0.53%
of portfolio
Number of shares
1,401,833 sh
Holdings current value
$196.42M
Avg closing price
$71.78
+111.1%
Last action
Trimmed 0.3%
2025Q4
Current $151.51
34
KTOSKRATOS DEFENSE & SEC SOLUTIO
Industrials·Aerospace & Defense
0.51%
of portfolio
Number of shares
4,084,269 sh
Holdings current value
$189.71M
Avg closing price
$16.97
+318.3%
Last action
Trimmed 15.0%
2025Q4
Current $70.99
35
WELLWELLTOWER INCREIT
Real Estate·REIT - Healthcare Facilities
0.51%
of portfolio
Number of shares
1,228,446 sh
Holdings current value
$188.85M
Avg closing price
$107.71
+95.5%
Last action
Added 8.0%
2025Q4
Current $210.52
36
APHAMPHENOL CORP NEW
Technology·Electronic Components
0.51%
of portfolio
Number of shares
1,889,030 sh
Holdings current value
$186.54M
Avg closing price
$75.33
+100.5%
Last action
Trimmed 8.6%
2025Q4
Current $151.06
37
MSFTMICROSOFT CORP
Technology·Software - Infrastructure
0.45%
of portfolio
Number of shares
334,758 sh
Holdings current value
$166.51M
Avg closing price
$231.09
+83.0%
Last action
Added 1.9%
2025Q4
Current $422.79
38
MELIMERCADOLIBRE INC
Consumer Cyclical·Internet Retail
0.44%
of portfolio
Number of shares
61,514 sh
Holdings current value
$160.77M
Avg closing price
$1029
+80.4%
Last action
Trimmed 1.1%
2025Q4
Current $1856
39
DKNGDRAFTKINGS INC NEW
Consumer Cyclical·Gambling
0.43%
of portfolio
Number of shares
3,670,460 sh
Holdings current value
$157.43M
Avg closing price
$28.01
-18.5%
Last action
Added 18.3%
2025Q4
Current $22.82
40
BNBROOKFIELD CORP
Financial Services·Asset Management
0.42%
of portfolio
Number of shares
2,510,075 sh
Holdings current value
$155.25M
Avg closing price
$46.67
-0.2%
Last action
Added 96.6%
2025Q4
Current $46.59
41
BFAMBRIGHT HORIZONS FAM SOL IN D
Consumer Cyclical·Personal Services
0.42%
of portfolio
Number of shares
1,241,174 sh
Holdings current value
$153.40M
Avg closing price
$74.96
+13.1%
Last action
Added 6.4%
2025Q4
Current $84.76
42
EQIXEQUINIX INCREIT
Real Estate·REIT - Specialty
0.41%
of portfolio
Number of shares
192,418 sh
Holdings current value
$153.06M
Avg closing price
$693.09
+57.1%
Last action
Trimmed 14.6%
2025Q4
Current $1089
43
TTDTHE TRADE DESK INC
Communication Services·Advertising Agencies
0.41%
of portfolio
Number of shares
2,088,350 sh
Holdings current value
$150.34M
Avg closing price
$69.39
-67.6%
Last action
Trimmed 38.3%
2025Q4
Current $22.47
44
FICOFAIR ISAAC CORP
Technology·Software - Application
0.40%
of portfolio
Number of shares
80,910 sh
Holdings current value
$147.90M
Avg closing price
$384.07
+179.5%
Last action
Trimmed 8.1%
2025Q4
Current $1074
45
AVGOBROADCOM INC
Technology·Semiconductors
0.40%
of portfolio
Number of shares
529,935 sh
Holdings current value
$146.08M
Avg closing price
$273.12
+48.8%
Last action
Added 8.3%
2025Q4
Current $406.54
46
GTLSCHART INDS INC
Industrials·Specialty Industrial Machinery
0.40%
of portfolio
Number of shares
885,306 sh
Holdings current value
$145.77M
Avg closing price
$139.72
+49.1%
Last action
Exited
2025Q3
Current $208.30
47
CNSCOHEN & STEERS INC
Financial Services·Asset Management
0.39%
of portfolio
Number of shares
1,928,299 sh
Holdings current value
$145.30M
Avg closing price
$49.54
+34.6%
Last action
Trimmed 44.8%
2025Q4
Current $66.67
48
TECHBIO-TECHNE CORP
Healthcare·Biotechnology
0.39%
of portfolio
Number of shares
2,795,147 sh
Holdings current value
$143.81M
Avg closing price
$87.15
-32.0%
Last action
Trimmed 31.6%
2025Q4
Current $59.23
49
ROPROPER TECHNOLOGIES INC
Technology·Software - Application
0.39%
of portfolio
Number of shares
253,672 sh
Holdings current value
$143.79M
Avg closing price
$214.42
+69.0%
Last action
Trimmed 6.8%
2025Q4
Current $362.44
50
CPNGCOUPANG INC
Consumer Cyclical·Internet Retail
0.38%
of portfolio
Number of shares
4,684,350 sh
Holdings current value
$140.34M
Avg closing price
$17.00
+26.7%
Last action
Trimmed 0.7%
2025Q4
Current $21.55
51
INTAINTAPP INC
Technology·Software - Application
0.38%
of portfolio
Number of shares
2,699,877 sh
Holdings current value
$139.37M
Avg closing price
$37.65
-39.4%
Last action
Added 19.8%
2025Q4
Current $22.82
52
DAYCERIDIAN HCM HLDG INC
0.36%
of portfolio
Number of shares
2,430,492 sh
Holdings current value
$134.62M
Avg closing price
$45.74
+52.7%
Last action
Exited
2025Q4
Current $69.86
53
PWRQUANTA SVCS INC
Industrials·Engineering & Construction
0.36%
of portfolio
Number of shares
354,475 sh
Holdings current value
$134.02M
Avg closing price
$195.61
+207.7%
Last action
Trimmed 7.5%
2025Q4
Current $601.88
54
CWANCLEARWATER ANALYTICS HLDGS I
Technology·Software - Application
0.36%
of portfolio
Number of shares
6,094,715 sh
Holdings current value
$133.66M
Avg closing price
$20.56
+17.2%
Last action
Added 2.4%
2025Q4
Current $24.11
55
TDGTRANSDIGM GROUP INC
Industrials·Aerospace & Defense
0.36%
of portfolio
Number of shares
87,844 sh
Holdings current value
$133.58M
Avg closing price
$310.31
+307.9%
Last action
Trimmed 4.7%
2025Q4
Current $1266
56
JLLJONES LANG LASALLE INC
Real Estate·Real Estate Services
0.36%
of portfolio
Number of shares
518,364 sh
Holdings current value
$132.59M
Avg closing price
$224.45
+54.3%
Last action
Added 0.0%
2025Q4
Current $346.43
57
TSMTAIWAN SEMICONDUCTOR MFG LTDADR
Technology·Semiconductors
0.36%
of portfolio
Number of shares
579,204 sh
Holdings current value
$131.18M
Avg closing price
$96.33
+284.6%
Last action
Added 5.2%
2025Q4
Current $370.50
58
TOLTOLL BROTHERS INC
Consumer Cyclical·Residential Construction
0.35%
of portfolio
Number of shares
1,134,680 sh
Holdings current value
$129.50M
Avg closing price
$89.29
+64.3%
Last action
Added 0.8%
2025Q4
Current $146.68
59
BWINBRP GROUP INC
Financial Services·Insurance Brokers
0.35%
of portfolio
Number of shares
3,010,000 sh
Holdings current value
$128.86M
Avg closing price
$18.30
+36.9%
Last action
Added 0.0%
2025Q4
Current $25.04
60
RBCRBC BEARINGS INC
Industrials·Tools & Accessories
0.34%
of portfolio
Number of shares
327,035 sh
Holdings current value
$125.84M
Avg closing price
$164.00
+259.6%
Last action
Trimmed 7.0%
2025Q4
Current $589.77
61
AMTAMERICAN TOWER CORP NEWREIT
Real Estate·REIT - Specialty
0.34%
of portfolio
Number of shares
567,767 sh
Holdings current value
$125.49M
Avg closing price
$214.39
-14.9%
Last action
Trimmed 31.9%
2025Q4
Current $182.36
62
PLNTPLANET FITNESS INC
Consumer Cyclical·Leisure
0.34%
of portfolio
Number of shares
1,150,000 sh
Holdings current value
$125.41M
Avg closing price
$47.13
+54.4%
Last action
Added 0.0%
2025Q3
Current $72.77
63
WYNNWYNN RESORTS LTD
Consumer Cyclical·Resorts & Casinos
0.34%
of portfolio
Number of shares
1,337,236 sh
Holdings current value
$125.26M
Avg closing price
$88.16
+23.9%
Last action
Trimmed 8.1%
2025Q4
Current $109.19
64
KRMNKARMAN HLDGS INC
Industrials·Aerospace & Defense
0.33%
of portfolio
Number of shares
2,415,134 sh
Holdings current value
$121.65M
Avg closing price
$33.52
+149.3%
Last action
Trimmed 15.9%
2025Q4
Current $83.58
65
PARPAR TECHNOLOGY CORP
Technology·Software - Application
0.33%
of portfolio
Number of shares
1,751,387 sh
Holdings current value
$121.49M
Avg closing price
$52.73
-73.1%
Last action
Trimmed 28.8%
2025Q4
Current $14.18
66
LLYVK*LIBERTY MEDIA CORP DELTRK
0.31%
of portfolio
Number of shares
1,417,398 sh
Holdings current value
$115.04M
Avg closing price
$46.06
Last action
Exited
2025Q4
Current —
67
IOTSAMSARA INC
Technology·Software - Infrastructure
0.29%
of portfolio
Number of shares
2,731,429 sh
Holdings current value
$108.66M
Avg closing price
$38.59
-20.7%
Last action
Added 37.2%
2025Q4
Current $30.62
68
BABAALIBABA GROUP HLDG LTDADR
Consumer Cyclical·Internet Retail
0.29%
of portfolio
Number of shares
948,015 sh
Holdings current value
$107.51M
Avg closing price
$137.00
+2.9%
Last action
Added 7.7%
2025Q4
Current $141.01
69
FWONKLIBERTY MEDIA CORP DELTRK
Communication Services·Entertainment
0.28%
of portfolio
Number of shares
1,000,000 sh
Holdings current value
$104.50M
Avg closing price
$62.30
+45.2%
Last action
Trimmed 9.1%
2025Q3
Current $90.48
70
VEEVVEEVA SYS INC
Healthcare·Health Information Services
0.28%
of portfolio
Number of shares
358,291 sh
Holdings current value
$103.18M
Avg closing price
$98.81
+70.0%
Last action
Trimmed 15.1%
2025Q4
Current $167.95
71
HEI/AHEICO CORP NEW
0.27%
of portfolio
Number of shares
391,992 sh
Holdings current value
$101.43M
Avg closing price
$126.14
Last action
Added 2.5%
2025Q4
Current —
72
M2682V108CYBERARK SOFTWARE LTD
0.27%
of portfolio
Number of shares
248,101 sh
Holdings current value
$100.95M
Avg closing price
$183.78
Last action
Trimmed 7.0%
2025Q4
Current —
73
G4705A100ICON PLC
0.27%
of portfolio
Number of shares
690,623 sh
Holdings current value
$100.45M
Avg closing price
$141.00
Last action
Trimmed 17.9%
2025Q4
Current —
74
TTANSERVICETITAN INC
Technology·Software - Application
0.27%
of portfolio
Number of shares
935,388 sh
Holdings current value
$100.25M
Avg closing price
$102.00
-36.9%
Last action
Added 16.8%
2025Q4
Current $64.31
75
ARGXARGENX SEADR
Healthcare·Biotechnology
0.27%
of portfolio
Number of shares
180,733 sh
Holdings current value
$99.62M
Avg closing price
$243.37
+248.9%
Last action
Trimmed 7.2%
2025Q4
Current $849.04

Portfolio heatmap

Box size = % of portfolio · color = return since filing
TSLA
11.21% · +26.1%
ARCH CAP GROUP LTD
4.87%
CSGP
4.29% · -50.6%
IT
4.00% · -61.7%
GWRE
3.57% · -40.4%
MSCI
3.39% · -1.4%
IDXX
2.96% · +9.9%
FDS
2.71% · -48.0%
MTN
2.33% · -15.2%
KNSL
2.31% · -25.4%
H
2.25% · +23.5%
SPOT
1.95% · -30.1%
SCHW
1.74% · +1.1%
RRR
1.73% · +9.4%
CHH
1.72% · -6.1%
NVDA
1.24% · +27.7%
PRI
1.18% · -0.3%
MORN
1.10% · -41.3%
VRSK
1.03% · -42.8%
GLPI
0.93% · +2.2%
FIGS
0.92% · +186.7%
VRT
0.89% · +139.3%
SHOP
0.83% · +13.7%
MTD
0.76% · +14.1%

Sector exposure

Share of dollar value across the latest reported portfolio. Unclassified positions excluded.
  • Consumer Cyclical39 pos$9.69B29.0%
  • Technology59 pos$6.78B20.3%
  • Financial Services39 pos$6.28B18.8%
  • Real Estate34 pos$3.37B10.1%
  • Industrials33 pos$2.74B8.2%
  • Healthcare50 pos$2.73B8.2%
  • Communication Services12 pos$1.63B4.9%
  • Basic Materials6 pos$202.8M0.6%
  • Consumer Defensive3 pos$14.3M0.0%
(9.4% unclassified, excluded from %)