Q3 2026 13F · SEC CIK 1418427

Robeco Schweiz AG

Investment managerFiled 2026-10-23 for Q3 2026. Open the filing ↗ · All SEC filings ↗

Reported 13F value: $5.5B
Reported positions: 135
Top holdings a year, 3 yrs: +17.0%
Average holding period: 4.9 yrs

Robeco Schweiz AG is an investment manager that reported 135 positions worth $5.5B in its Q3 2026 13F, filed 2026-10-23. Its largest holdings were Arm Holdings PLC (ARM, 4.1%), Nvent Elec PLC (NVT, 4.0%), Marvell Technology Inc (MRVL, 4.0%). A portfolio copying its top holdings returned 17.0% a year over the last 3 years, against 20.4% for the S&P 500.

Robeco Schweiz AG holdings largest 50 of 135 positions.

Weights are shares of the filer's total reported 13F value, compared with Q2 2026. Share changes may reflect splits; weight changes also reflect price moves. A 13F shows long US-listed positions only, up to 135 days after the fact.

Robeco Schweiz AG 13F holdings
Stock	% of 13F value	Q2 2026	Shares	Share change	Reported value
ARMArm Holdings PLC	4.1%	4.7%	777,229	-6.1%	$225.1M
NVTNvent Elec PLC	4.0%	3.9%	1,399,162	-3.5%	$224.4M
MRVLMarvell Technology Inc	4.0%	4.6%	834,248	-13.2%	$220.4M
PWRQuanta Svcs Inc	3.8%	3.8%	326,135	-0.1%	$209.5M
ADIAnalog Devices Inc	3.6%	3.4%	499,100	-5.4%	$198.0M
LITELumentum Hldgs Inc	3.1%	2.5%	175,239	-4.8%	$170.2M
VRTVertiv Holdings Co	2.9%	3.4%	666,809	+4.5%	$160.9M
AAgilent Technologies Inc	2.9%	2.1%	931,998	-7.5%	$160.6M
NXTNextpower Inc	2.4%	1.7%	1,721,087	+98.8%	$134.1M
ONOn Semiconductor Corp	2.3%	2.6%	1,658,310	-3.7%	$127.5M
MPWRMonolithic Pwr Sys Inc	2.2%	2.1%	89,007	-7.3%	$119.9M
LSCCLattice Semiconductor Corp	2.0%	2.2%	874,292	-3.9%	$109.8M
FSLRFirst Solar Inc	2.0%	2.5%	626,438	-3.9%	$109.7M
ADSKAutodesk Inc	2.0%	1.6%	524,042	+2.2%	$109.5M
RRXRegal Rexnord Corporation	1.9%	2.7%	678,280	-3.9%	$105.2M
BEBloom Energy Corp	1.9%	1.5%	371,725	+17.4%	$103.0M
GNRCGenerac Hldgs Inc	1.7%	2.3%	462,782	-3.9%	$95.8M
TMOThermo Fisher Scientific Inc	1.7%	1.5%	140,737	-26.3%	$95.0M
ITRIItron Inc	1.6%	1.5%	1,029,717	-2.3%	$88.9M
VLTOVeralto Corp	1.4%	1.3%	851,536	-3.5%	$80.3M
CSLCarlisle Cos Inc	1.4%	1.5%	242,195	-3.9%	$78.0M
TTEKTetra Tech Inc New	1.4%	1.4%	2,321,543	-25.1%	$76.5M
TTTrane Technologies PLC	1.4%	1.4%	169,032	-3.9%	$76.4M
XYLXylem Inc	1.4%	1.5%	742,622	-8.7%	$75.2M
POWIPower Integrations Inc	1.2%	1.8%	1,288,004	-3.9%	$66.7M
ENPHEnphase Energy Inc	1.2%	1.6%	1,981,141	-3.9%	$65.4M
DHRDanaher Corp Del	1.1%	0.9%	275,980	-10.9%	$61.1M
MWHSolv Energy Inc	1.1%	1.4%	2,538,139	-3.9%	$61.0M
ECLEcolab Inc	1.1%	1.0%	220,008	+1.4%	$60.4M
TKRTimken Co Com	1.1%	—	516,703	—	$60.3M
PCORProcore Technologies Inc	1.1%	0.8%	1,165,061	-1.2%	$60.3M
ENTGEntegris Inc	1.1%	—	387,452	—	$59.7M
TERTeradyne Inc	1.1%	1.0%	148,153	+14.7%	$59.4M
WATWaters Corp	1.0%	0.9%	128,250	-15.7%	$56.4M
IEXIdex Corp	1.0%	1.2%	237,916	-26.1%	$54.2M
FERGFerguson Enterprises Inc Common Stock Ne	1.0%	1.1%	240,773	-12.8%	$53.6M
FRVOFervo Energy Co	0.8%	0.9%	3,282,928	+66.7%	$44.6M
EMEEmcor Group Inc	0.8%	0.9%	57,743	-11.8%	$43.6M
RUNSunrun Inc	0.8%	0.9%	5,478,228	+28.5%	$42.6M
APGApi Group Corp	0.7%	0.6%	1,031,691	+15.7%	$39.8M
55658T105Madison Air Solutions Corp	0.7%	—	1,537,926	—	$37.8M
ONTOOnto Innovation Inc	0.7%	0.9%	122,670	-16.7%	$37.8M
AUGOAura Minerals Inc	0.7%	—	473,190	—	$37.2M
AITApplied Indl Technologies in	0.7%	0.8%	111,468	-25.9%	$37.0M
LINLinde PLC	0.7%	0.6%	78,035	+13.0%	$37.0M
WMWaste Mgmt Inc Del	0.6%	0.8%	170,568	-22.6%	$34.8M
WMSAdvanced Drain Sys Inc Del	0.6%	0.7%	271,480	-0.1%	$34.4M
HBMHudbay Minerals Inc	0.6%	—	1,253,650	—	$33.4M
SQMSociedad Quimica Y Minera de	0.6%	0.7%	499,152	-10.2%	$32.4M
JJacobs Solutions Inc	0.6%	0.6%	239,037	-21.3%	$32.3M

What Robeco Schweiz AG bought and sold in Q3 2026, against Q2 2026.

New positions

Q2 2026's filing was too long to tell new positions apart.

Share counts compared with the Q2 2026 13F; a split also changes share counts. The latest filing lists more than 50 positions, so a position that left the top 50 may still be held.

How the holdings did against the S&P 500.

1 year: +36.8% /yr; S&P 500 +20.1%
3 years: +17.0% /yr; S&P 500 +20.4%
5 years: +9.4% /yr; S&P 500 +11.6%

A portfolio of the filer's 20 largest 13F positions, weighted by value, bought the trading day after each 13F was filed and held until the next one was: what copying this filer could have earned. 13Fs show long US-listed positions only, so this is an estimate of the stock picks, not the fund's reported returns.

Reported 13F value by quarter.

13F value by quarter
Quarter	13F value	Positions
Q3 2026	$5.5B	135
Q2 2026	$6.2B	126
Q1 2026	$4.7B	126
Q4 2025	$4.5B	129
Q3 2025	$4.4B	128
Q2 2025	$4.3B	126
Q1 2025	$4.1B	129
Q4 2024	$4.7B	120
Q3 2024	$5.3B	120
Q2 2024	$5.2B	122
Q1 2024	$5.7B	120
Q4 2023	$6.0B	119

Questions about Robeco Schweiz AG's portfolio

What stocks does Robeco Schweiz AG own?

Robeco Schweiz AG's latest 13F, for Q3 2026 and filed Oct 23, 2026, lists 135 positions worth $5.5B. The largest are Arm Holdings PLC (ARM) at 4.1%, Nvent Elec PLC (NVT) at 4.0%, Marvell Technology Inc (MRVL) at 4.0%, Quanta Svcs Inc (PWR) at 3.8% and Analog Devices Inc (ADI) at 3.6%.

What did Robeco Schweiz AG buy last quarter?

In Q3 2026, Robeco Schweiz AG added Nextpower Inc (NXT) (+98.8% shares), Fervo Energy Co (FRVO) (+66.7% shares) and Sunrun Inc (RUN) (+28.5% shares), compared with its Q2 2026 filing.

What did Robeco Schweiz AG sell last quarter?

In Q3 2026, Robeco Schweiz AG cut from its top 50 Corning Inc (GLW), cut from its top 50 Viavi Solutions Inc (VIAV), cut from its top 50 Stmicroelectronics N V Ny Registry (STM), cut from its top 50 Spx Technologies Inc (SPXC), cut from its top 50 Texas Instrs Inc (TXN), Thermo Fisher Scientific Inc (TMO) (-26.3% shares), Idex Corp (IEX) (-26.1% shares) and Applied Indl Technologies in (AIT) (-25.9% shares), compared with its Q2 2026 filing.

How has Robeco Schweiz AG's portfolio performed?

A portfolio copying Robeco Schweiz AG's 20 largest 13F holdings each quarter, from the day each filing was public, returned +17.0% a year over the last 3 years, against +20.4% for the S&P 500. Over 1 year: +36.8% against +20.1%. Over 5 years: +9.4% a year against +11.6%.

When is Robeco Schweiz AG's next 13F filing due?

13F filings are due 45 days after each quarter ends. Robeco Schweiz AG's filing for the quarter ending Dec 31, 2026 is due by Feb 14, 2027; this page updates the day after it is published.