Westport Asset Management Inc

13F filer · CIK 0000811454

Reported Aug 11, 2026

Net buyer this quarter

13F portfolio value$245MU.S. long equity reported on 13F

Positions792 new · 0 closed

Net flow last quarter+$823KBuys minus sells

Top 10 positions weight50.1%Concentration

Holdings

13F · last 4 quarters free

Scroll for earlier quarters

Company	Value	% of portfolio	% of company	POSITION CHANGE qoq %	First reported
Q2 2026Reported Aug 11, 202679 positions
SNPSSynopsys Inc	$23.1M	9.41%	0.03%	Not reported	Q2 2015
WTWWillis Towers Watson PLC	$18.1M	7.39%	0.07%	Not reported	Q1 2016
CVSACovista Inc.	$15.7M	6.40%	0.37%	Not reported	Q1 2026
MTGMgic Investment Corp	$12.4M	5.06%	0.21%	Not reported	Q2 2013
UHSUniversal Health Services Inc	$9.67M	3.95%	Not reported	Not reported	Q2 2013
IPGPIpg Photonics Corp	$9.09M	3.71%	0.18%	Not reported	Q2 2013
URIUnited Rentals, Inc.	$9.06M	3.70%	0.01%	Not reported	Q2 2013
ZBRAZebra Technologies Corp	$9.04M	3.69%	0.07%	Not reported	Q4 2016
GOOGAlphabet Inc.	$8.48M	3.46%	Not reported	Not reported	Q1 2020
LITELumentum Holdings Inc.	$8.15M	3.33%	0.01%	Not reported	Q4 2018
DRIDarden Restaurants Inc	$7.21M	2.94%	0.03%	Not reported	Q2 2013
ORCLOracle Corp	$5.57M	2.27%	0.00%	Not reported	Q1 2021
COHRCoherent Corp.	$5.33M	2.17%	0.01%	Not reported	Q3 2017
EOGEog Resources Inc	$5.05M	2.06%	0.01%	Not reported	Q2 2013
RDNRadian Group Inc	$4.91M	2.01%	0.10%	Not reported	Q3 2013
LINLinde PLC	$4.67M	1.91%	0.00%	Not reported	Q4 2018
UBERUber Technologies, Inc	$4.52M	1.84%	0.00%	Not reported	Q4 2020
ROKRockwell Automation, Inc	$4.46M	1.82%	0.01%	Not reported	Q1 2020
CHKPCheck Point Software Technologies Ltd	$4.25M	1.73%	0.03%	Not reported	Q4 2016
CARRCARRIER GLOBAL Corp	$3.84M	1.57%	0.01%	Not reported	Q1 2020
TSBKTimberland Bancorp Inc	$3.63M	1.48%	1.04%	Not reported	Q2 2013
ROSTRoss Stores, Inc.	$3.62M	1.48%	0.01%	Not reported	Q2 2013
PTCPTC Inc.	$3.53M	1.44%	0.03%	Not reported	Q2 2013
ROGRogers Corp	$3.35M	1.37%	0.11%	Not reported	Q2 2013
AKAMAkamai Technologies Inc	$3.27M	1.34%	0.02%	Not reported	Q2 2020
RHPRyman Hospitality Properties, Inc.	$3.21M	1.31%	0.04%	Not reported	Q2 2013
RSGRepublic Services, Inc.	$3.2M	1.31%	0.00%	Not reported	Q2 2016
IBMInternational Business Machines Corp	$2.81M	1.15%	0.00%	Not reported	Q1 2020
UNPUnion Pacific Corp	$2.39M	0.98%	0.00%	Not reported	Q4 2016
CACICaci International Inc	$2.32M	0.95%	0.02%	Not reported	Q4 2016
VRTVertiv Holdings Co	$2.01M	0.82%	0.00%	Not reported	Q1 2025
NSCNorfolk Southern Corp	$1.89M	0.77%	0.00%	Not reported	Q1 2020
WBDWarner Bros. Discovery, Inc.	$1.86M	0.76%	0.00%	Not reported	Q2 2022
CVSCVS HEALTH Corp	$1.84M	0.75%	0.00%	Not reported	Q2 2013
EXPEagle Materials Inc	$1.8M	0.73%	0.03%	Not reported	Q1 2020
TXNTexas Instruments Inc	$1.8M	0.73%	0.00%	Not reported	Q4 2014
VRSKVerisk Analytics, Inc.	$1.53M	0.62%	0.01%	Not reported	Q1 2026
AZNAstrazeneca PLC	$1.42M	0.58%	Not reported	Not reported	Q2 2017
GILDGilead Sciences, Inc.	$1.26M	0.52%	0.00%	Not reported	Q2 2015
VRTXVertex Pharmaceuticals Inc / Ma	$1.24M	0.51%	0.00%	Not reported	Q4 2024
SPGIS&P Global Inc.	$1.16M	0.47%	0.00%	Not reported	Q1 2026
CHTRCharter Communications, Inc.	$1.07M	0.44%	0.00%	Not reported	Q4 2016
ZSZscaler, Inc.	$1.06M	0.43%	0.00%	+66.7%	Q1 2026
AMZNAmazon Com Inc	$887K	0.36%	0.00%	Not reported	Q1 2019
BIOBio-Rad Laboratories, Inc.	$881K	0.36%	0.01%	Not reported	Q1 2020
WATWaters Corp	$877K	0.36%	0.00%	Not reported	Q1 2026
EAElectronic Arts Inc.	$820K	0.33%	Not reported	Not reported	Q1 2025
RTXRTX Corp	$783K	0.32%	0.00%	Not reported	Q4 2022
MDUMdu Resources Group Inc	$742K	0.30%	0.02%	Not reported	Q2 2023
APDAir Products & Chemicals, Inc.	$733K	0.30%	0.00%	Not reported	Q4 2016

Q1 2026Reported May 15, 202677 positions
SNPSSynopsys Inc	$20.5M	9.05%	0.03%	Not reported	Q2 2015
WTWWillis Towers Watson PLC	$20.1M	8.89%	0.07%	Not reported	Q1 2016
CVSACovista Inc.	$14.5M	6.40%	0.37%	New	Q1 2026
UHSUniversal Health Services Inc	$11.6M	5.14%	Not reported	Not reported	Q2 2013
MTGMgic Investment Corp	$11.5M	5.09%	0.21%	Not reported	Q2 2013
IPGPIpg Photonics Corp	$8.88M	3.92%	0.18%	Not reported	Q2 2013
ZBRAZebra Technologies Corp	$7.18M	3.17%	0.07%	Not reported	Q4 2016
GOOGAlphabet Inc.	$6.88M	3.04%	Not reported	Not reported	Q1 2020
DRIDarden Restaurants Inc	$6.86M	3.03%	0.03%	Not reported	Q2 2013
LITELumentum Holdings Inc.	$6.68M	2.95%	0.01%	Not reported	Q4 2018
URIUnited Rentals, Inc.	$5.83M	2.57%	0.01%	Not reported	Q2 2013
EOGEog Resources Inc	$5.62M	2.48%	0.01%	Not reported	Q2 2013
ORCLOracle Corp	$5.59M	2.47%	0.00%	Not reported	Q1 2021
CHKPCheck Point Software Technologies Ltd	$4.61M	2.04%	0.03%	Not reported	Q4 2016
UBERUber Technologies, Inc	$4.5M	1.99%	0.00%	Not reported	Q4 2020
LINLinde PLC	$4.46M	1.97%	0.00%	Not reported	Q4 2018
PTCPTC Inc.	$4.43M	1.96%	0.03%	Not reported	Q2 2013
RDNRadian Group Inc	$4.31M	1.90%	0.10%	Not reported	Q3 2013
ROSTRoss Stores, Inc.	$3.68M	1.63%	0.01%	Not reported	Q2 2013
RSGRepublic Services, Inc.	$3.29M	1.45%	0.00%	Not reported	Q2 2016
ROKRockwell Automation, Inc	$3.23M	1.43%	0.01%	Not reported	Q1 2020
COHRCoherent Corp.	$3.22M	1.42%	0.01%	Not reported	Q3 2017
TSBKTimberland Bancorp Inc	$3.19M	1.41%	1.03%	Not reported	Q2 2013
AKAMAkamai Technologies Inc	$3.18M	1.40%	0.02%	Not reported	Q2 2020
CARRCARRIER GLOBAL Corp	$2.95M	1.30%	0.01%	Not reported	Q1 2020
CACICaci International Inc	$2.72M	1.20%	0.02%	Not reported	Q4 2016
IBMInternational Business Machines Corp	$2.42M	1.07%	0.00%	Not reported	Q1 2020
RHPRyman Hospitality Properties, Inc.	$2.31M	1.02%	0.04%	Not reported	Q2 2013
ROGRogers Corp	$2.2M	0.97%	0.11%	Not reported	Q2 2013
UNPUnion Pacific Corp	$2.14M	0.94%	0.00%	Not reported	Q4 2016
WBDWarner Bros. Discovery, Inc.	$1.92M	0.85%	0.00%	-12.5%	Q2 2022
NSCNorfolk Southern Corp	$1.72M	0.76%	0.00%	Not reported	Q1 2020
CHTRCharter Communications, Inc.	$1.63M	0.72%	0.00%	Not reported	Q4 2016
VRSKVerisk Analytics, Inc.	$1.61M	0.71%	0.01%	New	Q1 2026
EXPEagle Materials Inc	$1.52M	0.67%	0.03%	Not reported	Q1 2020
VRTVertiv Holdings Co	$1.5M	0.66%	0.00%	-25.0%	Q1 2025
AZNAstrazeneca PLC	$1.48M	0.65%	Not reported	Not reported	Q2 2017
GILDGilead Sciences, Inc.	$1.39M	0.62%	0.00%	Not reported	Q2 2015
CVSCVS HEALTH Corp	$1.28M	0.56%	0.00%	Not reported	Q2 2013
SPGIS&P Global Inc.	$1.28M	0.56%	0.00%	New	Q1 2026
TXNTexas Instruments Inc	$1.17M	0.52%	0.00%	Not reported	Q4 2014
VRTXVertex Pharmaceuticals Inc / Ma	$1.12M	0.49%	0.00%	Not reported	Q4 2024
TAt&T Inc.	$925K	0.41%	0.00%	Not reported	Q2 2018
BIOBio-Rad Laboratories, Inc.	$836K	0.37%	0.01%	Not reported	Q1 2020
EAElectronic Arts Inc.	$815K	0.36%	Not reported	Not reported	Q1 2025
RTXRTX Corp	$796K	0.35%	0.00%	Not reported	Q4 2022
AMZNAmazon Com Inc	$775K	0.34%	0.00%	Not reported	Q1 2019
APDAir Products & Chemicals, Inc.	$726K	0.32%	0.00%	Not reported	Q4 2016
MDUMdu Resources Group Inc	$725K	0.32%	0.02%	Not reported	Q2 2023
WATWaters Corp	$696K	0.31%	0.00%	New	Q1 2026

Q4 2025Reported Feb 4, 202673 positions
SNPSSynopsys Inc	$25.5M	10.64%	0.03%	Not reported	Q2 2015
WTWWillis Towers Watson PLC	$23.9M	9.98%	0.07%	Not reported	Q1 2016
UHSUniversal Health Services Inc	$13.3M	5.55%	Not reported	Not reported	Q2 2013
MTGMgic Investment Corp	$12.5M	5.20%	0.20%	Not reported	Q2 2013
ORCLOracle Corp	$10.7M	4.46%	0.00%	Not reported	Q1 2021
ZBRAZebra Technologies Corp	$10.2M	4.26%	0.07%	Not reported	Q4 2016
URIUnited Rentals, Inc.	$7.64M	3.19%	0.01%	Not reported	Q2 2013
CHKPCheck Point Software Technologies Ltd	$6.68M	2.79%	0.03%	Not reported	Q4 2016
DRIDarden Restaurants Inc	$6.66M	2.78%	0.03%	Not reported	Q2 2013
PTCPTC Inc.	$6.31M	2.63%	0.03%	Not reported	Q2 2013
IPGPIpg Photonics Corp	$6.14M	2.56%	0.18%	Not reported	Q2 2013
UBERUber Technologies, Inc	$6.13M	2.56%	0.00%	Not reported	Q4 2020
GOOGAlphabet Inc.	$5.85M	2.44%	Not reported	Not reported	Q1 2020
RDNRadian Group Inc	$4.72M	1.97%	0.10%	Not reported	Q3 2013
EOGEog Resources Inc	$4.36M	1.82%	0.01%	Not reported	Q2 2013
LINLinde PLC	$4.28M	1.78%	0.00%	Not reported	Q4 2018
RSGRepublic Services, Inc.	$3.44M	1.44%	0.00%	Not reported	Q2 2016
ROKRockwell Automation, Inc	$3.15M	1.31%	0.01%	Not reported	Q1 2020
CARRCARRIER GLOBAL Corp	$3.13M	1.31%	0.01%	Not reported	Q1 2020
IBMInternational Business Machines Corp	$2.82M	1.18%	0.00%	Not reported	Q1 2020
TSBKTimberland Bancorp Inc	$2.69M	1.12%	1.03%	Not reported	Q2 2013
ROSTRoss Stores, Inc.	$2.59M	1.08%	0.01%	Not reported	Q2 2013
CACICaci International Inc	$2.49M	1.04%	0.02%	Not reported	Q4 2016
RHPRyman Hospitality Properties, Inc.	$2.24M	0.93%	0.04%	Not reported	Q2 2013
AKAMAkamai Technologies Inc	$2.1M	0.88%	0.02%	Not reported	Q2 2020
UNPUnion Pacific Corp	$2.08M	0.87%	0.00%	Not reported	Q4 2016
CHTRCharter Communications, Inc.	$2.08M	0.87%	0.00%	Not reported	Q4 2016
WBDWarner Bros. Discovery, Inc.	$1.87M	0.78%	0.00%	-16.7%	Q2 2022
EXPEagle Materials Inc	$1.86M	0.78%	0.03%	Not reported	Q1 2020
NSCNorfolk Southern Corp	$1.8M	0.75%	0.00%	Not reported	Q1 2020
ROGRogers Corp	$1.65M	0.69%	0.11%	Not reported	Q2 2013
LITELumentum Holdings Inc.	$1.55M	0.64%	0.01%	Not reported	Q4 2018
COHRCoherent Corp.	$1.45M	0.61%	0.01%	Not reported	Q3 2017
CVSCVS HEALTH Corp	$1.34M	0.56%	0.00%	Not reported	Q2 2013
VRTVertiv Holdings Co	$1.21M	0.50%	0.00%	Not reported	Q1 2025
AZNAstrazeneca PLC	$1.15M	0.48%	Not reported	Not reported	Q2 2017
GILDGilead Sciences, Inc.	$1.11M	0.46%	0.00%	Not reported	Q2 2015
TXNTexas Instruments Inc	$1.11M	0.46%	0.00%	Not reported	Q4 2014
VRTXVertex Pharmaceuticals Inc / Ma	$979K	0.41%	0.00%	Not reported	Q4 2024
SKXSkechers USA Inc	$947K	0.40%	Not reported	Not reported	Q2 2016
TAt&T Inc.	$901K	0.38%	0.00%	Not reported	Q2 2018
BIOBio-Rad Laboratories, Inc.	$841K	0.35%	0.01%	Not reported	Q1 2020
AMZNAmazon Com Inc	$817K	0.34%	0.00%	Not reported	Q1 2019
EAElectronic Arts Inc.	$807K	0.34%	Not reported	Not reported	Q1 2025
RTXRTX Corp	$691K	0.29%	0.00%	Not reported	Q4 2022
APDAir Products & Chemicals, Inc.	$682K	0.28%	0.00%	Not reported	Q4 2016
NTRNutrien Ltd.	$655K	0.27%	0.00%	Not reported	Q2 2018
MDUMdu Resources Group Inc	$623K	0.26%	0.02%	Not reported	Q2 2023
ABTAbbott Laboratories	$536K	0.22%	0.00%	Not reported	Q4 2016
FMCFMC Corp	$504K	0.21%	0.01%	Not reported	Q3 2013

Q3 2025Reported Nov 12, 202573 positions
SNPSSynopsys Inc	$25.5M	10.63%	0.03%	+1.3%	Q2 2015
WTWWillis Towers Watson PLC	$23.9M	9.97%	0.07%	Not reported	Q1 2016
UHSUniversal Health Services Inc	$13.3M	5.55%	Not reported	Not reported	Q2 2013
MTGMgic Investment Corp	$12.5M	5.19%	0.19%	Not reported	Q2 2013
ORCLOracle Corp	$10.7M	4.46%	0.00%	Not reported	Q1 2021
ZBRAZebra Technologies Corp	$10.2M	4.26%	0.07%	Not reported	Q4 2016
URIUnited Rentals, Inc.	$7.64M	3.19%	0.01%	Not reported	Q2 2013
CHKPCheck Point Software Technologies Ltd	$6.68M	2.79%	0.03%	Not reported	Q4 2016
DRIDarden Restaurants Inc	$6.66M	2.78%	0.03%	Not reported	Q2 2013
PTCPTC Inc.	$6.31M	2.63%	0.03%	Not reported	Q2 2013
IPGPIpg Photonics Corp	$6.14M	2.56%	0.18%	Not reported	Q2 2013
UBERUber Technologies, Inc	$6.13M	2.56%	0.00%	Not reported	Q4 2020
GOOGAlphabet Inc.	$5.85M	2.44%	Not reported	Not reported	Q1 2020
RDNRadian Group Inc	$4.72M	1.97%	0.10%	Not reported	Q3 2013
EOGEog Resources Inc	$4.36M	1.82%	0.01%	Not reported	Q2 2013
LINLinde PLC	$4.28M	1.78%	0.00%	Not reported	Q4 2018
RSGRepublic Services, Inc.	$3.44M	1.44%	0.00%	Not reported	Q2 2016
ROKRockwell Automation, Inc	$3.15M	1.31%	0.01%	Not reported	Q1 2020
CARRCARRIER GLOBAL Corp	$3.13M	1.30%	0.01%	Not reported	Q1 2020
IBMInternational Business Machines Corp	$2.82M	1.18%	0.00%	Not reported	Q1 2020
TSBKTimberland Bancorp Inc	$2.69M	1.12%	1.03%	Not reported	Q2 2013
ROSTRoss Stores, Inc.	$2.59M	1.08%	0.01%	Not reported	Q2 2013
CACICaci International Inc	$2.49M	1.04%	0.02%	Not reported	Q4 2016
RHPRyman Hospitality Properties, Inc.	$2.24M	0.93%	0.04%	Not reported	Q2 2013
AKAMAkamai Technologies Inc	$2.1M	0.88%	0.02%	+9.9%	Q2 2020
UNPUnion Pacific Corp	$2.08M	0.87%	0.00%	Not reported	Q4 2016
CHTRCharter Communications, Inc.	$2.08M	0.87%	0.00%	Not reported	Q4 2016
WBDWarner Bros. Discovery, Inc.	$1.87M	0.78%	0.00%	Not reported	Q2 2022
EXPEagle Materials Inc	$1.86M	0.78%	0.02%	Not reported	Q1 2020
NSCNorfolk Southern Corp	$1.8M	0.75%	0.00%	Not reported	Q1 2020
ROGRogers Corp	$1.65M	0.69%	0.11%	Not reported	Q2 2013
LITELumentum Holdings Inc.	$1.55M	0.64%	0.01%	Not reported	Q4 2018
COHRCoherent Corp.	$1.45M	0.61%	0.01%	Not reported	Q3 2017
CVSCVS HEALTH Corp	$1.34M	0.56%	0.00%	Not reported	Q2 2013
VRTVertiv Holdings Co	$1.21M	0.50%	0.00%	Not reported	Q1 2025
AZNAstrazeneca PLC	$1.15M	0.48%	Not reported	Not reported	Q2 2017
GILDGilead Sciences, Inc.	$1.11M	0.46%	0.00%	Not reported	Q2 2015
TXNTexas Instruments Inc	$1.11M	0.46%	0.00%	Not reported	Q4 2014
VRTXVertex Pharmaceuticals Inc / Ma	$979K	0.41%	0.00%	Not reported	Q4 2024
SKXSkechers USA Inc	$947K	0.39%	Not reported	Not reported	Q2 2016
TAt&T Inc.	$901K	0.38%	0.00%	Not reported	Q2 2018
BIOBio-Rad Laboratories, Inc.	$841K	0.35%	0.01%	Not reported	Q1 2020
AMZNAmazon Com Inc	$817K	0.34%	0.00%	-57.3%	Q1 2019
EAElectronic Arts Inc.	$807K	0.34%	Not reported	Not reported	Q1 2025
RTXRTX Corp	$691K	0.29%	0.00%	Not reported	Q4 2022
APDAir Products & Chemicals, Inc.	$682K	0.28%	0.00%	Not reported	Q4 2016
NTRNutrien Ltd.	$655K	0.27%	0.00%	Not reported	Q2 2018
MDUMdu Resources Group Inc	$623K	0.26%	0.02%	Not reported	Q2 2023
ABTAbbott Laboratories	$536K	0.22%	0.00%	Not reported	Q4 2016
FMCFMC Corp	$504K	0.21%	0.01%	Not reported	Q3 2013

Premium opens every quarter this fund has filed