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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 · 2024Q4
1 / 5
75 of 316
1
TSLATESLA INC
Consumer Cyclical·Auto Manufacturers
15.22%
of portfolio
Number of shares
14,578,809 sh
Holdings current value
$5.89B
Avg closing price
$304.15
+31.7%
Last action
Trimmed 0.1%
2025Q4
Current $400.62
2
ITGARTNER INC
Technology·Information Technology Services
4.90%
of portfolio
Number of shares
3,916,203 sh
Holdings current value
$1.90B
Avg closing price
$116.73
+32.5%
Last action
Trimmed 2.7%
2025Q4
Current $154.62
3
G0450A105ARCH CAP GROUP LTD
4.88%
of portfolio
Number of shares
20,462,724 sh
Holdings current value
$1.89B
Avg closing price
$41.90
Last action
Trimmed 3.6%
2025Q4
Current —
4
CSGPCOSTAR GROUP INC
Real Estate·Real Estate Services
3.55%
of portfolio
Number of shares
19,203,564 sh
Holdings current value
$1.37B
Avg closing price
$91.42
-56.6%
Last action
Added 1.3%
2025Q4
Current $39.72
5
MSCIMSCI INC
Financial Services·Financial Data & Stock Exchanges
3.31%
of portfolio
Number of shares
2,131,931 sh
Holdings current value
$1.28B
Avg closing price
$231.43
+145.7%
Last action
Added 20.4%
2025Q4
Current $568.55
6
FDSFACTSET RESH SYS INC
Financial Services·Financial Data & Stock Exchanges
2.92%
of portfolio
Number of shares
2,355,611 sh
Holdings current value
$1.13B
Avg closing price
$212.07
+9.7%
Last action
Added 83.2%
2025Q4
Current $232.73
7
GWREGUIDEWIRE SOFTWARE INC
Technology·Software - Application
2.58%
of portfolio
Number of shares
5,915,183 sh
Holdings current value
$997.18M
Avg closing price
$65.03
+115.8%
Last action
Trimmed 0.4%
2025Q4
Current $140.36
8
MTNVAIL RESORTS INC
Consumer Cyclical·Resorts & Casinos
2.56%
of portfolio
Number of shares
5,290,546 sh
Holdings current value
$991.71M
Avg closing price
$152.03
-12.4%
Last action
Trimmed 14.4%
2025Q4
Current $133.22
9
HHYATT HOTELS CORP
Consumer Cyclical·Lodging
2.25%
of portfolio
Number of shares
5,550,789 sh
Holdings current value
$871.36M
Avg closing price
$67.76
+154.5%
Last action
Trimmed 0.2%
2025Q4
Current $172.48
10
IDXXIDEXX LABS INC
Healthcare·Diagnostics & Research
2.14%
of portfolio
Number of shares
2,005,522 sh
Holdings current value
$829.16M
Avg closing price
$104.10
+466.1%
Last action
Trimmed 4.1%
2025Q4
Current $589.25
11
KNSLKINSALE CAP GROUP INC
Financial Services·Insurance - Property & Casualty
2.08%
of portfolio
Number of shares
1,726,604 sh
Holdings current value
$803.10M
Avg closing price
$84.46
+327.2%
Last action
Trimmed 0.4%
2025Q4
Current $360.78
12
CHHCHOICE HOTELS INTL INC
Consumer Cyclical·Lodging
1.72%
of portfolio
Number of shares
4,682,492 sh
Holdings current value
$664.82M
Avg closing price
$73.55
+62.1%
Last action
Added 76.3%
2025Q4
Current $119.19
13
SCHWSCHWAB CHARLES CORP
Financial Services·Capital Markets
1.38%
of portfolio
Number of shares
7,217,828 sh
Holdings current value
$534.19M
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
1.36%
of portfolio
Number of shares
11,356,201 sh
Holdings current value
$525.11M
Avg closing price
$33.63
+69.2%
Last action
Added 2.3%
2025Q4
Current $56.91
15
AKXANSYS INC
1.23%
of portfolio
Number of shares
1,416,224 sh
Holdings current value
$477.73M
Avg closing price
$102.95
Last action
Exited
2025Q3
Current —
16
PRIPRIMERICA INC
Financial Services·Insurance - Life
1.16%
of portfolio
Number of shares
1,655,547 sh
Holdings current value
$449.35M
Avg closing price
$44.69
+510.7%
Last action
Trimmed 14.3%
2025Q4
Current $272.89
17
MORNMORNINGSTAR INC
Financial Services·Financial Data & Stock Exchanges
1.14%
of portfolio
Number of shares
1,305,155 sh
Holdings current value
$439.52M
Avg closing price
$117.66
+56.6%
Last action
Trimmed 11.7%
2025Q4
Current $184.28
18
SPOTSPOTIFY TECHNOLOGY S A
Communication Services·Internet Content & Information
1.04%
of portfolio
Number of shares
897,166 sh
Holdings current value
$401.37M
Avg closing price
$264.41
+102.9%
Last action
Added 1.0%
2025Q4
Current $536.61
19
NVDANVIDIA CORPORATION
Technology·Semiconductors
0.99%
of portfolio
Number of shares
2,846,647 sh
Holdings current value
$382.28M
Avg closing price
$142.81
+41.2%
Last action
Added 0.1%
2025Q4
Current $201.68
20
GLPIGAMING & LEISURE PPTYS INCREIT
Real Estate·REIT - Specialty
0.97%
of portfolio
Number of shares
7,817,443 sh
Holdings current value
$376.49M
Avg closing price
$32.44
+47.1%
Last action
Trimmed 29.6%
2025Q4
Current $47.73
21
VRSKVERISK ANALYTICS INC
Industrials·Consulting Services
0.89%
of portfolio
Number of shares
1,252,586 sh
Holdings current value
$345.00M
Avg closing price
$110.27
+61.5%
Last action
Added 7.0%
2025Q4
Current $178.07
22
MTDMETTLER TOLEDO INTERNATIONAL
Healthcare·Diagnostics & Research
0.89%
of portfolio
Number of shares
280,994 sh
Holdings current value
$343.85M
Avg closing price
$345.85
+287.6%
Last action
Trimmed 18.8%
2025Q4
Current $1341
23
IRDMIRIDIUM COMMUNICATIONS INC
Communication Services·Telecom Services
0.81%
of portfolio
Number of shares
10,769,377 sh
Holdings current value
$312.53M
Avg closing price
$18.33
+128.3%
Last action
Trimmed 4.3%
2025Q4
Current $41.85
24
VRTVERTIV HOLDINGS CO
Industrials·Electrical Equipment & Parts
0.81%
of portfolio
Number of shares
2,750,000 sh
Holdings current value
$312.43M
Avg closing price
$13.22
+2225.3%
Last action
Trimmed 16.0%
2025Q4
Current $307.34
25
TECHBIO-TECHNE CORP
Healthcare·Biotechnology
0.77%
of portfolio
Number of shares
4,136,984 sh
Holdings current value
$297.99M
Avg closing price
$87.15
-32.0%
Last action
Trimmed 23.8%
2025Q4
Current $59.23
26
EQIXEQUINIX INCREIT
Real Estate·REIT - Specialty
0.71%
of portfolio
Number of shares
291,587 sh
Holdings current value
$274.93M
Avg closing price
$693.09
+57.1%
Last action
Trimmed 10.1%
2025Q4
Current $1089
27
SHOPSHOPIFY INC
Technology·Software - Application
0.71%
of portfolio
Number of shares
2,581,257 sh
Holdings current value
$274.47M
Avg closing price
$100.58
+30.4%
Last action
Added 0.1%
2025Q4
Current $131.15
28
DAYCERIDIAN HCM HLDG INC
0.66%
of portfolio
Number of shares
3,526,456 sh
Holdings current value
$256.16M
Avg closing price
$45.74
+52.7%
Last action
Exited
2025Q4
Current $69.86
29
MSFTMICROSOFT CORP
Technology·Software - Infrastructure
0.63%
of portfolio
Number of shares
576,241 sh
Holdings current value
$242.89M
Avg closing price
$231.09
+83.0%
Last action
Added 1.1%
2025Q4
Current $422.79
30
AMZNAMAZON COM INC
Consumer Cyclical·Internet Retail
0.61%
of portfolio
Number of shares
1,080,063 sh
Holdings current value
$236.96M
Avg closing price
$201.71
+24.2%
Last action
Added 15.7%
2025Q4
Current $250.56
31
SITESITEONE LANDSCAPE SUPPLY INC
Industrials·Industrial Distribution
0.56%
of portfolio
Number of shares
1,652,772 sh
Holdings current value
$217.79M
Avg closing price
$94.03
+53.5%
Last action
Added 3.9%
2025Q4
Current $144.35
32
HLIHOULIHAN LOKEY INC
Financial Services·Capital Markets
0.51%
of portfolio
Number of shares
1,144,179 sh
Holdings current value
$198.70M
Avg closing price
$46.69
+248.1%
Last action
Trimmed 0.5%
2025Q4
Current $162.50
33
FIGSFIGS INC
Consumer Cyclical·Apparel Manufacturing
0.49%
of portfolio
Number of shares
30,837,759 sh
Holdings current value
$190.89M
Avg closing price
$7.14
+126.4%
Last action
Added 0.1%
2025Q4
Current $16.17
34
M2029K104BIRKENSTOCK HOLDING PLC
0.49%
of portfolio
Number of shares
3,359,351 sh
Holdings current value
$190.34M
Avg closing price
$46.40
Last action
Added 92.3%
2025Q4
Current —
35
TTDTHE TRADE DESK INC
Communication Services·Advertising Agencies
0.49%
of portfolio
Number of shares
1,616,029 sh
Holdings current value
$189.93M
Avg closing price
$69.39
-67.6%
Last action
Trimmed 44.6%
2025Q4
Current $22.47
36
FICOFAIR ISAAC CORP
Technology·Software - Application
0.48%
of portfolio
Number of shares
93,590 sh
Holdings current value
$186.33M
Avg closing price
$384.07
+179.5%
Last action
Trimmed 7.1%
2025Q4
Current $1074
37
CNSCOHEN & STEERS INC
Financial Services·Asset Management
0.48%
of portfolio
Number of shares
2,008,882 sh
Holdings current value
$185.50M
Avg closing price
$49.54
+34.6%
Last action
Trimmed 43.8%
2025Q4
Current $66.67
38
CBRECBRE GROUP INC
Real Estate·Real Estate Services
0.47%
of portfolio
Number of shares
1,390,985 sh
Holdings current value
$182.62M
Avg closing price
$71.78
+111.1%
Last action
Trimmed 0.3%
2025Q4
Current $151.51
39
GTLSCHART INDS INC
Industrials·Specialty Industrial Machinery
0.47%
of portfolio
Number of shares
952,404 sh
Holdings current value
$181.76M
Avg closing price
$139.72
+49.1%
Last action
Exited
2025Q3
Current $208.30
40
TSMTAIWAN SEMICONDUCTOR MFG LTDADR
Technology·Semiconductors
0.45%
of portfolio
Number of shares
877,053 sh
Holdings current value
$173.21M
Avg closing price
$96.33
+284.6%
Last action
Added 3.4%
2025Q4
Current $370.50
41
H5919C104ON HLDG AG
0.45%
of portfolio
Number of shares
3,157,793 sh
Holdings current value
$172.95M
Avg closing price
$35.38
Last action
Added 26.4%
2025Q4
Current —
42
BFAMBRIGHT HORIZONS FAM SOL IN D
Consumer Cyclical·Personal Services
0.45%
of portfolio
Number of shares
1,559,277 sh
Holdings current value
$172.85M
Avg closing price
$74.96
+13.1%
Last action
Added 5.0%
2025Q4
Current $84.76
43
METAMETA PLATFORMS INC
Communication Services·Internet Content & Information
0.43%
of portfolio
Number of shares
281,029 sh
Holdings current value
$164.55M
Avg closing price
$244.55
+181.6%
Last action
Added 1.8%
2025Q4
Current $688.55
44
IBKRINTERACTIVE BROKERS GROUP IN
Financial Services·Capital Markets
0.42%
of portfolio
Number of shares
913,967 sh
Holdings current value
$161.47M
Avg closing price
$63.76
+28.2%
Last action
Added 3.8%
2025Q4
Current $81.71
45
INTAINTAPP INC
Technology·Software - Application
0.41%
of portfolio
Number of shares
2,484,012 sh
Holdings current value
$159.20M
Avg closing price
$37.65
-39.4%
Last action
Added 21.9%
2025Q4
Current $22.82
46
GDSGDS HLDGS LTDADR
Technology·Information Technology Services
0.41%
of portfolio
Number of shares
6,673,226 sh
Holdings current value
$158.56M
Avg closing price
$22.66
+97.2%
Last action
Trimmed 6.6%
2025Q4
Current $44.70
47
G4705A100ICON PLC
0.40%
of portfolio
Number of shares
734,167 sh
Holdings current value
$153.96M
Avg closing price
$141.00
Last action
Trimmed 17.0%
2025Q4
Current —
48
ARGXARGENX SEADR
Healthcare·Biotechnology
0.39%
of portfolio
Number of shares
242,178 sh
Holdings current value
$148.94M
Avg closing price
$243.37
+248.9%
Last action
Trimmed 5.5%
2025Q4
Current $849.04
49
TREXTREX CO INC
Industrials·Building Products & Equipment
0.38%
of portfolio
Number of shares
2,153,133 sh
Holdings current value
$148.63M
Avg closing price
$65.01
-34.2%
Last action
Exited
2025Q4
Current $42.77
50
CWANCLEARWATER ANALYTICS HLDGS I
Technology·Software - Application
0.38%
of portfolio
Number of shares
5,324,970 sh
Holdings current value
$146.54M
Avg closing price
$20.56
+17.2%
Last action
Added 2.7%
2025Q4
Current $24.11
51
WELLWELLTOWER INCREIT
Real Estate·REIT - Healthcare Facilities
0.38%
of portfolio
Number of shares
1,151,495 sh
Holdings current value
$145.12M
Avg closing price
$107.71
+95.5%
Last action
Added 8.5%
2025Q4
Current $210.52
52
WSTWEST PHARMACEUTICAL SVSC INC
Healthcare·Medical Instruments & Supplies
0.37%
of portfolio
Number of shares
434,121 sh
Holdings current value
$142.20M
Avg closing price
$69.77
+292.3%
Last action
Trimmed 8.0%
2025Q4
Current $273.73
53
BNBROOKFIELD CORP
Financial Services·Asset Management
0.36%
of portfolio
Number of shares
2,391,691 sh
Holdings current value
$137.40M
Avg closing price
$46.67
-0.2%
Last action
Added 106.5%
2025Q4
Current $46.59
54
TDGTRANSDIGM GROUP INC
Industrials·Aerospace & Defense
0.35%
of portfolio
Number of shares
107,844 sh
Holdings current value
$136.67M
Avg closing price
$310.31
+307.9%
Last action
Trimmed 3.9%
2025Q4
Current $1266
55
BXBLACKSTONE INC
Financial Services·Asset Management
0.35%
of portfolio
Number of shares
785,682 sh
Holdings current value
$135.47M
Avg closing price
$119.44
+8.1%
Last action
Trimmed 4.4%
2025Q4
Current $129.08
56
ROPROPER TECHNOLOGIES INC
Technology·Software - Application
0.34%
of portfolio
Number of shares
253,317 sh
Holdings current value
$131.69M
Avg closing price
$214.42
+69.0%
Last action
Trimmed 6.8%
2025Q4
Current $362.44
57
ASGNASGN INC
Technology·Information Technology Services
0.34%
of portfolio
Number of shares
1,570,286 sh
Holdings current value
$130.87M
Avg closing price
$80.58
-51.1%
Last action
Trimmed 0.7%
2025Q4
Current $39.44
58
DNUTKRISPY KREME INC
Consumer Defensive·Grocery Stores
0.34%
of portfolio
Number of shares
13,069,717 sh
Holdings current value
$129.78M
Avg closing price
$12.64
-71.4%
Last action
Exited
2025Q2
Current $3.61
59
APHAMPHENOL CORP NEW
Technology·Electronic Components
0.33%
of portfolio
Number of shares
1,850,768 sh
Holdings current value
$128.54M
Avg closing price
$75.33
+100.5%
Last action
Trimmed 8.8%
2025Q4
Current $151.06
60
CPNGCOUPANG INC
Consumer Cyclical·Internet Retail
0.33%
of portfolio
Number of shares
5,757,166 sh
Holdings current value
$126.54M
Avg closing price
$17.00
+26.7%
Last action
Trimmed 0.5%
2025Q4
Current $21.55
61
PLNTPLANET FITNESS INC
Consumer Cyclical·Leisure
0.32%
of portfolio
Number of shares
1,250,000 sh
Holdings current value
$123.59M
Avg closing price
$47.13
+54.4%
Last action
Added 0.0%
2025Q3
Current $72.77
62
BABAALIBABA GROUP HLDG LTDADR
Consumer Cyclical·Internet Retail
0.31%
of portfolio
Number of shares
1,434,620 sh
Holdings current value
$121.64M
Avg closing price
$137.00
+2.9%
Last action
Added 5.0%
2025Q4
Current $141.01
63
DEIDOUGLAS EMMETT INCREIT
Real Estate·REIT - Office
0.31%
of portfolio
Number of shares
6,388,156 sh
Holdings current value
$118.56M
Avg closing price
$23.81
-56.1%
Last action
Trimmed 20.3%
2025Q4
Current $10.45
64
BWINBRP GROUP INC
Financial Services·Insurance Brokers
0.30%
of portfolio
Number of shares
3,010,000 sh
Holdings current value
$116.67M
Avg closing price
$18.30
+36.9%
Last action
Added 0.0%
2025Q4
Current $25.04
65
KTOSKRATOS DEFENSE & SEC SOLUTIO
Industrials·Aerospace & Defense
0.30%
of portfolio
Number of shares
4,374,077 sh
Holdings current value
$115.39M
Avg closing price
$16.97
+318.3%
Last action
Trimmed 14.2%
2025Q4
Current $70.99
66
AVGOBROADCOM INC
Technology·Semiconductors
0.29%
of portfolio
Number of shares
484,330 sh
Holdings current value
$112.29M
Avg closing price
$273.12
+48.8%
Last action
Added 9.1%
2025Q4
Current $406.54
67
FNDFLOOR & DECOR HLDGS INC
Consumer Cyclical·Home Improvement Retail
0.29%
of portfolio
Number of shares
1,125,941 sh
Holdings current value
$112.26M
Avg closing price
$60.90
-11.2%
Last action
Trimmed 13.3%
2025Q4
Current $54.07
68
DLRDIGITAL RLTY TR INCREIT
Real Estate·REIT - Specialty
0.29%
of portfolio
Number of shares
631,257 sh
Holdings current value
$111.94M
Avg closing price
$146.87
+38.6%
Last action
Trimmed 19.7%
2025Q4
Current $203.62
69
YMMFULL TRUCK ALLIANCE CO LTDADR
Technology·Software - Application
0.28%
of portfolio
Number of shares
10,078,316 sh
Holdings current value
$109.05M
Avg closing price
$7.52
+18.1%
Last action
Trimmed 5.1%
2025Q4
Current $8.88
70
JLLJONES LANG LASALLE INC
Real Estate·Real Estate Services
0.28%
of portfolio
Number of shares
420,366 sh
Holdings current value
$106.41M
Avg closing price
$224.45
+54.3%
Last action
Added 0.0%
2025Q4
Current $346.43
71
NEOGNEOGEN CORP
Healthcare·Medical Devices
0.27%
of portfolio
Number of shares
8,485,308 sh
Holdings current value
$103.01M
Avg closing price
$23.50
-59.5%
Last action
Trimmed 13.7%
2025Q4
Current $9.51
72
VNOVORNADO RLTY TRREIT
Real Estate·REIT - Office
0.27%
of portfolio
Number of shares
2,443,712 sh
Holdings current value
$102.73M
Avg closing price
$40.19
-27.1%
Last action
Exited
2025Q4
Current $29.28
73
PWRQUANTA SVCS INC
Industrials·Engineering & Construction
0.26%
of portfolio
Number of shares
323,335 sh
Holdings current value
$102.19M
Avg closing price
$195.61
+207.7%
Last action
Trimmed 8.2%
2025Q4
Current $601.88
74
MELIMERCADOLIBRE INC
Consumer Cyclical·Internet Retail
0.26%
of portfolio
Number of shares
58,198 sh
Holdings current value
$98.96M
Avg closing price
$1029
+80.4%
Last action
Trimmed 1.1%
2025Q4
Current $1856
75
NETCLOUDFLARE INC
Technology·Software - Infrastructure
0.25%
of portfolio
Number of shares
897,555 sh
Holdings current value
$96.65M
Avg closing price
$55.03
+265.2%
Last action
Trimmed 4.7%
2025Q4
Current $200.99

Portfolio heatmap

Box size = % of portfolio · color = return since filing
TSLA
15.22% · -0.8%
IT
4.90% · -68.1%
ARCH CAP GROUP LTD
4.88%
CSGP
3.55% · -44.5%
MSCI
3.31% · -5.2%
FDS
2.92% · -51.5%
GWRE
2.58% · -16.7%
MTN
2.56% · -28.9%
H
2.25% · +9.9%
IDXX
2.14% · +42.5%
KNSL
2.08% · -22.4%
CHH
1.72% · -16.1%
SCHW
1.38% · +24.7%
RRR
1.36% · +23.1%
AKX
1.23%
PRI
1.16% · +0.5%
MORN
1.14% · -45.3%
SPOT
1.04% · +19.9%
NVDA
0.99% · +50.2%
GLPI
0.97% · -0.9%
VRSK
0.89% · -35.3%
MTD
0.89% · +9.6%
IRDM
0.81% · +44.2%
VRT
0.81% · +170.5%

Sector exposure

Share of dollar value across the latest reported portfolio. Unclassified positions excluded.
  • Consumer Cyclical42 pos$11.17B32.2%
  • Technology62 pos$6.89B19.9%
  • Financial Services38 pos$6.28B18.1%
  • Real Estate28 pos$3.27B9.4%
  • Healthcare53 pos$2.82B8.1%
  • Industrials33 pos$2.44B7.0%
  • Communication Services13 pos$1.40B4.0%
  • Basic Materials6 pos$193.2M0.6%
  • Consumer Defensive5 pos$187.8M0.5%
(10.4% unclassified, excluded from %)