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Cantillon Capital Management LLC William Von Mueffling

New York, NY 23 processed 13Fs on this site, 2021 Q3 to 2026 Q2

  • $665M
  • 27 holdings
  • 2026 Q2
  • −95.6% QoQ
  • Top 5 40.2%

William Von Mueffling's biggest moves in 2026 Q2 were trimming Taiwan Semiconductor and Broadcom, and selling out of Thermo Fisher Scientific and Aon.

Portfolio

2026 Q2, filed 7/29/2026, top 12 of 27 holdings

Top 5 40.2%, top 10 61.8%

  1. AVGO, Broadcom 10.6%
  2. GOOGL, Alphabet 9.2%
  3. TSM, Taiwan Semiconductor 8.2%
  4. IBKR, Interactive Brokers 6.8%
  5. AMAT, Applied Materials 5.4%
  6. ADI, Analog Devices 5.3%
  7. SPGI, S&P Global 4.4%
  8. V, Visa 4.3%
  9. MSFT, Microsoft 3.9%
  10. CBRE, CBRE Group 3.7%
  11. LYV, Live Nation Entertainment 3.1%
  12. BLK, BlackRock 3.0%
  13. Other 32.1%

AUM over time

2026 Q2 $665M −95.6% QoQ
2021 Q3: $14.7B 2021 Q3: $14.7B
Q3 2021
2021 Q4: $15.1B, +3.2% QoQ 2021 Q4: $15.1B, +3.2% QoQ
Q4
2022 Q1: $14B, −7.5% QoQ 2022 Q1: $14B, −7.5% QoQ
Q1 2022
2022 Q2: $12B, −14.5% QoQ 2022 Q2: $12B, −14.5% QoQ
Q2
2022 Q3: $11B, −7.8% QoQ 2022 Q3: $11B, −7.8% QoQ
Q3
2022 Q4: $11.8B, +6.9% QoQ 2022 Q4: $11.8B, +6.9% QoQ
Q4
2023 Q1: $12.3B, +4.0% QoQ 2023 Q1: $12.3B, +4.0% QoQ
Q1 2023
2023 Q2: $14.3B, +16.5% QoQ 2023 Q2: $14.3B, +16.5% QoQ
Q2
2023 Q3: $13.5B, −5.8% QoQ 2023 Q3: $13.5B, −5.8% QoQ
Q3
2023 Q4: $15B, +11.0% QoQ 2023 Q4: $15B, +11.0% QoQ
Q4
2024 Q1: $15.9B, +6.2% QoQ 2024 Q1: $15.9B, +6.2% QoQ
Q1 2024
2024 Q2: $15B, −5.9% QoQ 2024 Q2: $15B, −5.9% QoQ
Q2
2024 Q3: $16.4B, +9.3% QoQ 2024 Q3: $16.4B, +9.3% QoQ
Q3
2024 Q4: $16.5B, +1.2% QoQ 2024 Q4: $16.5B, +1.2% QoQ
Q4
2025 Q1: $15.4B, −6.7% QoQ 2025 Q1: $15.4B, −6.7% QoQ
Q1 2025
2025 Q2: $17.3B, +12.0% QoQ 2025 Q2: $17.3B, +12.0% QoQ
Q2
2025 Q3: $18.2B, +5.0% QoQ 2025 Q3: $18.2B, +5.0% QoQ
Q3
2025 Q4: $18.5B, +1.8% QoQ 2025 Q4: $18.5B, +1.8% QoQ
Q4
2026 Q1: $15.1B, −18.6% QoQ 2026 Q1: $15.1B, −18.6% QoQ
Q1 2026
2026 Q2: $665M, −95.6% QoQ 2026 Q2: $665M, −95.6% QoQ
Q2

Latest book

2026 Q2 2026 Q1, filed 29 Jul, long equity only

Download CSV Download Excel All activity
AVGO, Broadcom 10.61% Reduce −95.4% 186,760 $377.75 $71M −3,869,242 −$1.2B
GOOGL, Alphabet 9.19% Reduce −95.4% 171,066 $357.37 $61M −3,543,995 −$1B
TSM, Taiwan Semiconductor 8.24% Reduce −95.4% 114,820 $477.57 $55M −2,378,731 −$788M
IBKR, Interactive Brokers 6.78% Reduce −95.4% 517,833 $87.04 $45M −10,728,048 −$709M
AMAT, Applied Materials 5.45% Reduce −96.7% 50,176 $723.00 $36M −1,471,667 −$484M
ADI, Analog Devices 5.26% Reduce −95.4% 88,014 $397.17 $35M −1,823,477 −$573M
SPGI, S&P Global 4.36%, was 4.37% Reduce −95.4% 71,249 $407.26 $29M −1,476,054 −$629M
V, Visa 4.31% Reduce −95.1% 83,643 $343.09 $29M −1,634,515 −$491M
MSFT, Microsoft 3.86% Reduce −93.8% 68,901 $373.02 $26M −1,043,364 −$386M
CBRE, CBRE Group 3.67% Reduce −95.4% 181,083 $134.69 $24M −3,750,893 −$508M
LYV, Live Nation Entertainment 3.12% Reduce −95.4% 113,503 $183.11 $21M −2,351,556 −$355M
BLK, BlackRock 3.02% Reduce −95.4% 20,873 $961.56 $20M −432,409 −$416M
FERG, Ferguson 2.87% Reduce −95.4% 80,548 $237.33 $19M −1,668,754 −$389M
FAST, Fastenal 2.72% Reduce −95.4% 376,044 $48.03 $18M −7,790,620 −$361M
ENTG, Entegris 2.70% Reduce −95.4% 99,756 $179.86 $18M −2,066,672 −$236M
CP, Canadian Pacific Kansas City 2.60% Reduce −95.4% 199,860 $86.65 $17M −4,144,575 −$324M
UBER, Uber 2.59% Reduce −95.4% 238,965 $72.16 $17M −4,954,899 −$356M
A, Agilent Technologies 2.53% Reduce −95.4% 126,437 $132.83 $17M −2,619,392 −$296M
ICE, Intercontinental Exchange 2.51%, was 3.07% Reduce −95.4% 135,468 $123.11 $17M −2,806,486 −$446M
ORCL, Oracle 2.32% Reduce −91.8% 105,457 $146.55 $15M −1,177,728 −$173M
CME, CME Group 2.12%, was 2.72% Reduce −95.4% 63,835 $220.83 $14M −1,322,511 −$395M
YUM, Yum Brands 2.01% Reduce −95.4% 83,427 $159.86 $13M −1,728,369 −$268M
TW, Tradeweb Markets 1.63%, was 1.85% Reduce −95.4% 108,989 $99.66 $11M −2,258,052 −$268M
SSNC, SS And C Technologies 1.61%, was 1.68% Reduce −95.4% 172,816 $62.05 $11M −3,580,277 −$243M
SPOT, Spotify 1.40%, was 1.42% Reduce −95.4% 20,216 $459.13 $9.3M −419,137 −$204M
TCOM, Trip.com 1.28%, was 1.52% Reduce −95.3% 214,242 $39.84 $8.5M −4,375,379 −$220M
MCO, Moody's 1.23% Reduce −95.4% 18,075 $452.92 $8.2M −374,438 −$163M

Exits / last held

Gone since 2026 Q1, shown at their last reported size.

Stock % of portfolio Recent activity Shares Reported price* Value Share change $ change
TMO, Thermo Fisher Scientific 2.51% Exit 0 $491.53 $378M −769,698 −$378M
AON, Aon 2.35% Exit 0 $322.78 $354M −1,095,574 −$354M
EFX, Equifax 2.14% Exit 0 $180.07 $323M −1,791,379 −$323M
IQV, IQVIA 1.94% Exit 0 $170.54 $292M −1,710,896 −$292M
AMT, American Tower 1.85% Exit 0 $172.58 $278M −1,612,473 −$278M
ADBE, Adobe 1.65% Exit 0 $243.08 $248M −1,019,710 −$248M
ALC, Alcon 1.26% Exit 0 $75.35 $189M −2,507,095 −$189M
FLUT, Flutter Entertainment 0.93% Exit 0 $101.95 $140M −1,375,776 −$140M
TME, Tencent Music Entertainment 0.83% Exit 0 $9.28 $124M −13,382,595 −$124M
LPLA, LPL Financial 0.65% Exit 0 $300.83 $98M −324,927 −$98M
FWONK, Liberty Media 0.59% Exit 0 $85.02 $88M −1,035,685 −$88M

Weight bar: held both quarters added sold at this quarter’s reported price

* Reported price is value ÷ shares from the 13F as of period end, not a live market quote. Weight % is each long-equity position ÷ full 13F AUM, so rows may not sum to 100% when the filing includes options or other non-equity (excluded from this table). Share change and $ change are vs 2026 Q1. Click a column header to sort, or New, Hold, Add or Reduce to bring those moves to the top. Exit opens the last-held block below.

Filings history

20 periods, with AUM normalized

Newest 13Fs
Period Holds AUM QoQ Form Filed Filing ID
2026 Q2 27 $665M −95.6% 13F-HR 7/29/2026 000127993626000005
2026 Q1 38 $15.1B −18.6% 13F-HR 5/7/2026 000127993626000004
2025 Q4 37 $18.5B +1.8% 13F-HR 2/11/2026 000127993626000001
2025 Q3 76 $18.2B — RESTATEMENT 2/17/2026 000089914026000221
2025 Q3 38 $18.2B +5.0% 13F-HR 10/30/2025 000127993625000002
2025 Q2 75 $17.3B — RESTATEMENT 2/17/2026 000089914026000220
2025 Q2 38 $17.3B +12.0% 13F-HR 7/30/2025 000108514625004326
2025 Q1 74 $15.4B — RESTATEMENT 2/17/2026 000089914026000219
2025 Q1 37 $15.4B −6.7% 13F-HR 5/9/2025 000108514625002887
2024 Q4 36 $16.5B +1.2% 13F-HR 2/5/2025 000108514625000819
2024 Q3 38 $16.4B +9.3% 13F-HR 11/7/2024 000108514624005445
2024 Q2 39 $15B −5.9% 13F-HR 8/5/2024 000108514624003487
2024 Q1 37 $15.9B +6.2% 13F-HR 5/8/2024 000108514624002327
2023 Q4 37 $15B +11.0% 13F-HR 2/7/2024 000108514624000806
2023 Q3 39 $13.5B −5.8% 13F-HR 11/6/2023 000108514623004105
2023 Q2 38 $14.3B +16.5% 13F-HR 8/9/2023 000108514623003182
2023 Q1 37 $12.3B +4.0% 13F-HR 5/4/2023 000108514623002054
2022 Q4 39 $11.8B +6.9% 13F-HR 2/6/2023 000108514623000646
2022 Q3 39 $11B −7.8% 13F-HR 11/3/2022 000108514622003752
2022 Q2 39 $12B −14.5% 13F-HR 8/3/2022 000108514622002745
2022 Q1 37 $14B −7.5% 13F-HR 5/3/2022 000108514622001676
2021 Q4 38 $15.1B +3.2% 13F-HR 1/27/2022 000108514622000359
2021 Q3 37 $14.7B — 13F-HR 10/26/2021 000108514621002904

About

Cantillon Capital Management LLC

23 processed 13Fs on this site, 2021 Q3 to 2026 Q2

Notable person
William Von Mueffling
SEC filing name
CANTILLON CAPITAL MANAGEMENT LLC
Location
New York, NY
All SEC filings
View on sec.gov