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Built from publicly disclosed institutional and insider activity. Informational purposes only - not investment advice.OpenStocks · v0.1
Logos by elbstream.com
  1. Home/
  2. Super Investors/
  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 · 2025Q4
1 / 5
75 of 327
1
TSLATESLA INC
Consumer Cyclical·Auto Manufacturers
14.53%
of portfolio
Number of shares
11,927,475 sh
Holdings current value
$5.36B
Avg closing price
$304.15
+31.7%
Last action
Trimmed 0.2%
2025Q4
Current $400.62
2
G0450A105ARCH CAP GROUP LTD
4.67%
of portfolio
Number of shares
17,987,505 sh
Holdings current value
$1.73B
Avg closing price
$41.90
Last action
Trimmed 4.1%
2025Q4
Current —
3
MSCIMSCI INC
Financial Services·Financial Data & Stock Exchanges
4.28%
of portfolio
Number of shares
2,755,747 sh
Holdings current value
$1.58B
Avg closing price
$231.43
+145.7%
Last action
Added 15.1%
2025Q4
Current $568.55
4
CSGPCOSTAR GROUP INC
Real Estate·Real Estate Services
3.55%
of portfolio
Number of shares
19,498,099 sh
Holdings current value
$1.31B
Avg closing price
$91.42
-56.6%
Last action
Added 1.3%
2025Q4
Current $39.72
5
IDXXIDEXX LABS INC
Healthcare·Diagnostics & Research
3.30%
of portfolio
Number of shares
1,798,041 sh
Holdings current value
$1.22B
Avg closing price
$104.10
+466.1%
Last action
Trimmed 4.6%
2025Q4
Current $589.25
6
ITGARTNER INC
Technology·Information Technology Services
2.88%
of portfolio
Number of shares
4,212,957 sh
Holdings current value
$1.06B
Avg closing price
$116.73
+32.5%
Last action
Trimmed 2.5%
2025Q4
Current $154.62
7
GWREGUIDEWIRE SOFTWARE INC
Technology·Software - Application
2.80%
of portfolio
Number of shares
5,147,550 sh
Holdings current value
$1.03B
Avg closing price
$65.03
+115.8%
Last action
Trimmed 0.4%
2025Q4
Current $140.36
8
HHYATT HOTELS CORP
Consumer Cyclical·Lodging
2.65%
of portfolio
Number of shares
6,106,485 sh
Holdings current value
$978.99M
Avg closing price
$67.76
+154.5%
Last action
Trimmed 0.2%
2025Q4
Current $172.48
9
FDSFACTSET RESH SYS INC
Financial Services·Financial Data & Stock Exchanges
2.27%
of portfolio
Number of shares
2,888,845 sh
Holdings current value
$838.31M
Avg closing price
$212.07
+9.7%
Last action
Added 58.8%
2025Q4
Current $232.73
10
RRRRED ROCK RESORTS INC
Consumer Cyclical·Resorts & Casinos
2.10%
of portfolio
Number of shares
12,519,892 sh
Holdings current value
$775.61M
Avg closing price
$33.63
+69.2%
Last action
Added 2.0%
2025Q4
Current $56.91
11
SCHWSCHWAB CHARLES CORP
Financial Services·Capital Markets
1.91%
of portfolio
Number of shares
7,060,309 sh
Holdings current value
$705.40M
Avg closing price
$35.45
+160.3%
Last action
Trimmed 1.0%
2025Q4
Current $92.28
12
CHHCHOICE HOTELS INTL INC
Consumer Cyclical·Lodging
1.91%
of portfolio
Number of shares
7,386,575 sh
Holdings current value
$703.65M
Avg closing price
$73.55
+62.1%
Last action
Added 37.8%
2025Q4
Current $119.19
13
KNSLKINSALE CAP GROUP INC
Financial Services·Insurance - Property & Casualty
1.89%
of portfolio
Number of shares
1,781,201 sh
Holdings current value
$696.66M
Avg closing price
$84.46
+327.2%
Last action
Trimmed 0.4%
2025Q4
Current $360.78
14
FIGSFIGS INC
Consumer Cyclical·Apparel Manufacturing
1.85%
of portfolio
Number of shares
59,959,449 sh
Holdings current value
$681.14M
Avg closing price
$7.14
+126.4%
Last action
Added 0.0%
2025Q4
Current $16.17
15
MTNVAIL RESORTS INC
Consumer Cyclical·Resorts & Casinos
1.73%
of portfolio
Number of shares
4,809,928 sh
Holdings current value
$638.76M
Avg closing price
$152.03
-12.4%
Last action
Trimmed 15.7%
2025Q4
Current $133.22
16
SPOTSPOTIFY TECHNOLOGY S A
Communication Services·Internet Content & Information
1.57%
of portfolio
Number of shares
997,291 sh
Holdings current value
$579.14M
Avg closing price
$264.41
+102.9%
Last action
Added 0.9%
2025Q4
Current $536.61
17
NVDANVIDIA CORPORATION
Technology·Semiconductors
1.51%
of portfolio
Number of shares
2,988,943 sh
Holdings current value
$557.44M
Avg closing price
$142.81
+41.2%
Last action
Added 0.1%
2025Q4
Current $201.68
18
SHOPSHOPIFY INC
Technology·Software - Application
1.00%
of portfolio
Number of shares
2,288,270 sh
Holdings current value
$368.34M
Avg closing price
$100.58
+30.4%
Last action
Added 0.1%
2025Q4
Current $131.15
19
M2029K104BIRKENSTOCK HOLDING PLC
0.88%
of portfolio
Number of shares
7,966,037 sh
Holdings current value
$325.81M
Avg closing price
$46.40
Last action
Added 25.4%
2025Q4
Current —
20
IBKRINTERACTIVE BROKERS GROUP IN
Financial Services·Capital Markets
0.81%
of portfolio
Number of shares
4,643,376 sh
Holdings current value
$298.62M
Avg closing price
$63.76
+28.2%
Last action
Added 0.7%
2025Q4
Current $81.71
21
PRIPRIMERICA INC
Financial Services·Insurance - Life
0.79%
of portfolio
Number of shares
1,132,544 sh
Holdings current value
$292.60M
Avg closing price
$44.69
+510.7%
Last action
Trimmed 19.6%
2025Q4
Current $272.89
22
VRSKVERISK ANALYTICS INC
Industrials·Consulting Services
0.79%
of portfolio
Number of shares
1,302,611 sh
Holdings current value
$291.38M
Avg closing price
$110.27
+61.5%
Last action
Added 6.7%
2025Q4
Current $178.07
23
AMZNAMAZON COM INC
Consumer Cyclical·Internet Retail
0.77%
of portfolio
Number of shares
1,225,159 sh
Holdings current value
$282.79M
Avg closing price
$201.71
+24.2%
Last action
Added 13.6%
2025Q4
Current $250.56
24
MORNMORNINGSTAR INC
Financial Services·Financial Data & Stock Exchanges
0.73%
of portfolio
Number of shares
1,241,794 sh
Holdings current value
$269.85M
Avg closing price
$117.66
+56.6%
Last action
Trimmed 12.2%
2025Q4
Current $184.28
25
SITESITEONE LANDSCAPE SUPPLY INC
Industrials·Industrial Distribution
0.68%
of portfolio
Number of shares
2,028,366 sh
Holdings current value
$252.65M
Avg closing price
$94.03
+53.5%
Last action
Added 3.1%
2025Q4
Current $144.35
26
H5919C104ON HLDG AG
0.68%
of portfolio
Number of shares
5,405,486 sh
Holdings current value
$251.25M
Avg closing price
$35.38
Last action
Added 13.9%
2025Q4
Current —
27
VRTVERTIV HOLDINGS CO
Industrials·Electrical Equipment & Parts
0.68%
of portfolio
Number of shares
1,545,572 sh
Holdings current value
$250.40M
Avg closing price
$13.22
+2225.3%
Last action
Trimmed 25.4%
2025Q4
Current $307.34
28
WELLWELLTOWER INCREIT
Real Estate·REIT - Healthcare Facilities
0.64%
of portfolio
Number of shares
1,277,492 sh
Holdings current value
$237.12M
Avg closing price
$107.71
+95.5%
Last action
Added 7.6%
2025Q4
Current $210.52
29
APHAMPHENOL CORP NEW
Technology·Electronic Components
0.63%
of portfolio
Number of shares
1,710,742 sh
Holdings current value
$231.19M
Avg closing price
$75.33
+100.5%
Last action
Trimmed 9.5%
2025Q4
Current $151.06
30
CBRECBRE GROUP INC
Real Estate·Real Estate Services
0.59%
of portfolio
Number of shares
1,359,332 sh
Holdings current value
$218.57M
Avg closing price
$71.78
+111.1%
Last action
Trimmed 0.3%
2025Q4
Current $151.51
31
MTDMETTLER TOLEDO INTERNATIONAL
Healthcare·Diagnostics & Research
0.55%
of portfolio
Number of shares
146,334 sh
Holdings current value
$204.02M
Avg closing price
$345.85
+287.6%
Last action
Trimmed 30.8%
2025Q4
Current $1341
32
HLIHOULIHAN LOKEY INC
Financial Services·Capital Markets
0.53%
of portfolio
Number of shares
1,123,951 sh
Holdings current value
$195.78M
Avg closing price
$46.69
+248.1%
Last action
Trimmed 0.6%
2025Q4
Current $162.50
33
TSMTAIWAN SEMICONDUCTOR MFG LTDADR
Technology·Semiconductors
0.52%
of portfolio
Number of shares
634,652 sh
Holdings current value
$192.86M
Avg closing price
$96.33
+284.6%
Last action
Added 4.7%
2025Q4
Current $370.50
34
JLLJONES LANG LASALLE INC
Real Estate·Real Estate Services
0.51%
of portfolio
Number of shares
564,297 sh
Holdings current value
$189.87M
Avg closing price
$224.45
+54.3%
Last action
Added 0.0%
2025Q4
Current $346.43
35
CWANCLEARWATER ANALYTICS HLDGS I
Technology·Software - Application
0.51%
of portfolio
Number of shares
7,816,447 sh
Holdings current value
$188.53M
Avg closing price
$20.56
+17.2%
Last action
Added 1.8%
2025Q4
Current $24.11
36
AVGOBROADCOM INC
Technology·Semiconductors
0.50%
of portfolio
Number of shares
537,840 sh
Holdings current value
$186.15M
Avg closing price
$273.12
+48.8%
Last action
Added 8.1%
2025Q4
Current $406.54
37
METAMETA PLATFORMS INC
Communication Services·Internet Content & Information
0.48%
of portfolio
Number of shares
270,126 sh
Holdings current value
$178.31M
Avg closing price
$244.55
+181.6%
Last action
Added 1.9%
2025Q4
Current $688.55
38
BNBROOKFIELD CORP
Financial Services·Asset Management
0.45%
of portfolio
Number of shares
3,635,917 sh
Holdings current value
$166.85M
Avg closing price
$46.67
-0.2%
Last action
Added 51.4%
2025Q4
Current $46.59
39
MSFTMICROSOFT CORP
Technology·Software - Infrastructure
0.45%
of portfolio
Number of shares
341,758 sh
Holdings current value
$165.28M
Avg closing price
$231.09
+83.0%
Last action
Added 1.9%
2025Q4
Current $422.79
40
DKNGDRAFTKINGS INC NEW
Consumer Cyclical·Gambling
0.44%
of portfolio
Number of shares
4,674,455 sh
Holdings current value
$161.08M
Avg closing price
$28.01
-18.5%
Last action
Added 13.8%
2025Q4
Current $22.82
41
TOLTOLL BROTHERS INC
Consumer Cyclical·Residential Construction
0.43%
of portfolio
Number of shares
1,166,270 sh
Holdings current value
$157.70M
Avg closing price
$89.29
+64.3%
Last action
Added 0.8%
2025Q4
Current $146.68
42
BABAALIBABA GROUP HLDG LTDADR
Consumer Cyclical·Internet Retail
0.43%
of portfolio
Number of shares
1,071,647 sh
Holdings current value
$157.08M
Avg closing price
$137.00
+2.9%
Last action
Added 6.8%
2025Q4
Current $141.01
43
INTAINTAPP INC
Technology·Software - Application
0.41%
of portfolio
Number of shares
3,327,989 sh
Holdings current value
$152.49M
Avg closing price
$37.65
-39.4%
Last action
Added 15.5%
2025Q4
Current $22.82
44
WYNNWYNN RESORTS LTD
Consumer Cyclical·Resorts & Casinos
0.40%
of portfolio
Number of shares
1,219,590 sh
Holdings current value
$146.75M
Avg closing price
$88.16
+23.9%
Last action
Trimmed 8.8%
2025Q4
Current $109.19
45
IOTSAMSARA INC
Technology·Software - Infrastructure
0.40%
of portfolio
Number of shares
4,120,031 sh
Holdings current value
$146.06M
Avg closing price
$38.59
-20.7%
Last action
Added 21.9%
2025Q4
Current $30.62
46
LOARLOAR HOLDINGS INC
Industrials·Aerospace & Defense
0.39%
of portfolio
Number of shares
2,119,505 sh
Holdings current value
$144.13M
Avg closing price
$77.22
-12.6%
Last action
Added 17.2%
2025Q4
Current $67.48
47
PLDPROLOGIS INC.REIT
Real Estate·REIT - Industrial
0.38%
of portfolio
Number of shares
1,109,127 sh
Holdings current value
$141.59M
Avg closing price
$113.96
+27.3%
Last action
Added 24.4%
2025Q4
Current $145.10
48
KRMNKARMAN HLDGS INC
Industrials·Aerospace & Defense
0.38%
of portfolio
Number of shares
1,914,221 sh
Holdings current value
$140.06M
Avg closing price
$33.52
+149.3%
Last action
Trimmed 19.3%
2025Q4
Current $83.58
49
PWRQUANTA SVCS INC
Industrials·Engineering & Construction
0.38%
of portfolio
Number of shares
328,010 sh
Holdings current value
$138.44M
Avg closing price
$195.61
+207.7%
Last action
Trimmed 8.1%
2025Q4
Current $601.88
50
RBCRBC BEARINGS INC
Industrials·Tools & Accessories
0.37%
of portfolio
Number of shares
303,110 sh
Holdings current value
$135.92M
Avg closing price
$164.00
+259.6%
Last action
Trimmed 7.5%
2025Q4
Current $589.77
51
LLYVKLIBERTY LIVE HOLDINGS INC
Communication Services·Entertainment
0.36%
of portfolio
Number of shares
1,613,666 sh
Holdings current value
$134.19M
Avg closing price
$83.16
+16.1%
Last action
New holding
2025Q4
Current $96.53
52
GDSGDS HLDGS LTDADR
Technology·Information Technology Services
0.36%
of portfolio
Number of shares
3,784,848 sh
Holdings current value
$132.09M
Avg closing price
$22.66
+97.2%
Last action
Trimmed 11.1%
2025Q4
Current $44.70
53
ARGXARGENX SEADR
Healthcare·Biotechnology
0.35%
of portfolio
Number of shares
153,719 sh
Holdings current value
$129.27M
Avg closing price
$243.37
+248.9%
Last action
Trimmed 8.3%
2025Q4
Current $849.04
54
MELIMERCADOLIBRE INC
Consumer Cyclical·Internet Retail
0.34%
of portfolio
Number of shares
61,964 sh
Holdings current value
$124.81M
Avg closing price
$1029
+80.4%
Last action
Trimmed 1.1%
2025Q4
Current $1856
55
PLNTPLANET FITNESS INC
Consumer Cyclical·Leisure
0.34%
of portfolio
Number of shares
1,150,028 sh
Holdings current value
$124.74M
Avg closing price
$47.13
+54.4%
Last action
Added 0.0%
2025Q3
Current $72.77
56
ABNBAIRBNB INC
Consumer Cyclical·Travel Services
0.32%
of portfolio
Number of shares
880,076 sh
Holdings current value
$119.44M
Avg closing price
$129.26
+9.5%
Last action
Added 52.1%
2025Q4
Current $141.55
57
TTANSERVICETITAN INC
Technology·Software - Application
0.32%
of portfolio
Number of shares
1,096,931 sh
Holdings current value
$116.82M
Avg closing price
$102.00
-36.9%
Last action
Added 14.0%
2025Q4
Current $64.31
58
FICOFAIR ISAAC CORP
Technology·Software - Application
0.31%
of portfolio
Number of shares
68,651 sh
Holdings current value
$116.06M
Avg closing price
$384.07
+179.5%
Last action
Trimmed 9.5%
2025Q4
Current $1074
59
NOVTNOVANTA INC
Technology·Scientific & Technical Instruments
0.30%
of portfolio
Number of shares
936,962 sh
Holdings current value
$111.49M
Avg closing price
$115.89
+11.2%
Last action
Added 49.4%
2025Q4
Current $128.85
60
EQIXEQUINIX INCREIT
Real Estate·REIT - Specialty
0.30%
of portfolio
Number of shares
145,429 sh
Holdings current value
$111.42M
Avg closing price
$693.09
+57.1%
Last action
Trimmed 18.5%
2025Q4
Current $1089
61
PCORPROCORE TECHNOLOGIES INC
Technology·Software - Application
0.30%
of portfolio
Number of shares
1,515,982 sh
Holdings current value
$110.27M
Avg closing price
$72.79
-23.8%
Last action
Added 2.4%
2025Q4
Current $55.44
62
IBPINSTALLED BLDG PRODS INC
Consumer Cyclical·Residential Construction
0.30%
of portfolio
Number of shares
423,182 sh
Holdings current value
$109.77M
Avg closing price
$83.49
+256.5%
Last action
Trimmed 7.6%
2025Q4
Current $297.64
63
HEI/AHEICO CORP NEW
0.30%
of portfolio
Number of shares
434,342 sh
Holdings current value
$109.64M
Avg closing price
$126.14
Last action
Added 2.3%
2025Q4
Current —
64
JBTMJOHN BEAN TECHNOLOGIES CORP
Industrials·Specialty Industrial Machinery
0.29%
of portfolio
Number of shares
700,040 sh
Holdings current value
$105.48M
Avg closing price
$98.34
+34.5%
Last action
Added 0.0%
2025Q3
Current $132.23
65
G25508105CRH PLC
0.29%
of portfolio
Number of shares
844,634 sh
Holdings current value
$105.41M
Avg closing price
$89.92
Last action
Added 0.2%
2025Q4
Current —
66
TDGTRANSDIGM GROUP INC
Industrials·Aerospace & Defense
0.28%
of portfolio
Number of shares
77,799 sh
Holdings current value
$103.46M
Avg closing price
$310.31
+307.9%
Last action
Trimmed 5.3%
2025Q4
Current $1266
67
BFAMBRIGHT HORIZONS FAM SOL IN D
Consumer Cyclical·Personal Services
0.28%
of portfolio
Number of shares
1,013,488 sh
Holdings current value
$102.77M
Avg closing price
$74.96
+13.1%
Last action
Added 7.9%
2025Q4
Current $84.76
68
CPNGCOUPANG INC
Consumer Cyclical·Internet Retail
0.27%
of portfolio
Number of shares
4,274,350 sh
Holdings current value
$100.83M
Avg closing price
$17.00
+26.7%
Last action
Trimmed 0.7%
2025Q4
Current $21.55
69
LVSLAS VEGAS SANDS CORP
Consumer Cyclical·Resorts & Casinos
0.26%
of portfolio
Number of shares
1,497,892 sh
Holdings current value
$97.50M
Avg closing price
$52.23
+10.4%
Last action
Added 23.0%
2025Q4
Current $57.64
70
G4705A100ICON PLC
0.26%
of portfolio
Number of shares
534,248 sh
Holdings current value
$97.35M
Avg closing price
$141.00
Last action
Trimmed 22.0%
2025Q4
Current —
71
EXKEXACT SCIENCES CORP
Basic Materials·Silver
0.26%
of portfolio
Number of shares
954,547 sh
Holdings current value
$96.94M
Avg closing price
$48.03
-78.8%
Last action
Trimmed 55.4%
2025Q4
Current $10.18
72
VTRVENTAS INCREIT
Real Estate·REIT - Healthcare Facilities
0.26%
of portfolio
Number of shares
1,219,483 sh
Holdings current value
$94.36M
Avg closing price
$75.08
+13.4%
Last action
Added 615.1%
2025Q4
Current $85.10
73
M6191J100JFROG LTD
0.25%
of portfolio
Number of shares
1,493,518 sh
Holdings current value
$93.29M
Avg closing price
$37.94
Last action
Added 19.6%
2025Q4
Current —
74
LLYLILLY ELI & CO
Healthcare·Drug Manufacturers - General
0.25%
of portfolio
Number of shares
86,476 sh
Holdings current value
$92.93M
Avg closing price
$697.47
+32.9%
Last action
Added 1.0%
2025Q4
Current $927.03
75
ROPROPER TECHNOLOGIES INC
Technology·Software - Application
0.25%
of portfolio
Number of shares
207,437 sh
Holdings current value
$92.34M
Avg closing price
$214.42
+69.0%
Last action
Trimmed 8.2%
2025Q4
Current $362.44

Portfolio heatmap

Box size = % of portfolio · color = return since filing
TSLA
14.53% · -10.9%
ARCH CAP GROUP LTD
4.67%
MSCI
4.28% · -0.9%
CSGP
3.55% · -40.9%
IDXX
3.30% · -12.9%
IT
2.88% · -38.7%
GWRE
2.80% · -30.2%
H
2.65% · +7.6%
FDS
2.27% · -19.8%
RRR
2.10% · -8.1%
SCHW
1.91% · -7.6%
CHH
1.91% · +25.1%
KNSL
1.89% · -7.8%
FIGS
1.85% · +42.3%
MTN
1.73% · +0.3%
SPOT
1.57% · -7.6%
NVDA
1.51% · +8.1%
SHOP
1.00% · -18.5%
BIRKENSTOCK HOLDING PLC
0.88%
IBKR
0.81% · +27.1%
PRI
0.79% · +5.6%
VRSK
0.79% · -20.4%
AMZN
0.77% · +8.6%
MORN
0.73% · -15.2%

Sector exposure

Share of dollar value across the latest reported portfolio. Unclassified positions excluded.
  • Consumer Cyclical40 pos$11.53B34.2%
  • Technology67 pos$6.52B19.3%
  • Financial Services45 pos$5.97B17.7%
  • Healthcare61 pos$2.83B8.4%
  • Real Estate28 pos$2.74B8.1%
  • Industrials36 pos$2.54B7.5%
  • Communication Services15 pos$1.31B3.9%
  • Basic Materials5 pos$233.6M0.7%
  • Consumer Defensive2 pos$42.3M0.1%
(8.7% unclassified, excluded from %)