Q2 2026 13F · SEC CIK 811454

Westport Asset Management Inc

Asset managerFiled 2026-08-11 for Q2 2026. Open the filing ↗ · All SEC filings ↗

Reported 13F value: $244.9M
Reported positions: 80
Top holdings a year, 3 yrs: +11.7%
Average holding period: 8.6 yrs

Westport Asset Management Inc is an asset manager that reported 80 positions worth $244.9M in its Q2 2026 13F, filed 2026-08-11. Its largest holdings were Synopsys Inc (SNPS, 9.4%), Willis Towers Watson PLC Ltd (WTW, 7.4%), Covista Inc (CVSA, 6.4%). A portfolio copying its top holdings returned 11.7% a year over the last 3 years, against 22.3% for the S&P 500.

Westport Asset Management Inc holdings largest 50 of 80 positions.

Weights are shares of the filer's total reported 13F value, compared with Q1 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.

Westport Asset Management Inc 13F holdings
Stock	% of 13F value	Q1 2026	Shares	Share change	Reported value
SNPSSynopsys Inc	9.4%	9.0%	51,679	+0.0%	$23.1M
WTWWillis Towers Watson PLC Ltd	7.4%	8.9%	69,234	+0.0%	$18.1M
CVSACovista Inc	6.4%	6.4%	125,759	+0.0%	$15.7M
MTGMgic Invt Corp Wis	5.1%	5.1%	439,013	+0.0%	$12.4M
UHSUniversal Hlth Svcs Inc	4.0%	5.1%	65,059	+0.0%	$9.7M
IPGPIpg Photonics Corp	3.7%	3.9%	77,500	+0.0%	$9.1M
URIUnited Rentals Inc	3.7%	2.6%	8,000	+0.0%	$9.1M
ZBRAZebra Technologies Corporati	3.7%	3.2%	34,335	+0.0%	$9.0M
GOOGAlphabet Inc	3.5%	3.0%	24,000	+0.0%	$8.5M
LITELumentum Hldgs Inc	3.3%	2.9%	9,500	+0.0%	$8.2M
DRIDarden Restaurants Inc	2.9%	3.0%	35,000	+0.0%	$7.2M
EEMIshares Tr	2.8%	2.5%	100,000	+0.0%	$6.8M
ORCLOracle Corp	2.3%	2.5%	38,000	+0.0%	$5.6M
COHRCoherent Inc	2.2%	1.4%	13,500	+0.0%	$5.3M
EOGEog Res Inc	2.1%	2.5%	38,889	+0.0%	$5.0M
RDNRadian Group Inc	2.0%	1.9%	130,371	+0.0%	$4.9M
LINLinde PLC	1.9%	2.0%	9,000	+0.0%	$4.7M
UBERUber Technologies Inc	1.8%	2.0%	62,577	+0.0%	$4.5M
ROKRockwell Automation Inc	1.8%	1.4%	9,000	+0.0%	$4.5M
CHKPCheck Point Software Tech Lt	1.7%	2.0%	32,300	+0.0%	$4.2M
CARRCarrier Global Corporation	1.6%	1.3%	52,400	+0.0%	$3.8M
TSBKTimberland Bancorp Inc	1.5%	1.4%	80,909	+0.0%	$3.6M
ROSTRoss Stores Inc	1.5%	1.6%	17,000	+0.0%	$3.6M
PTCPtc Inc	1.4%	2.0%	31,100	+0.0%	$3.5M
ROGRogers Corp	1.4%	1.0%	20,456	+0.0%	$3.3M
AKAMAkamai Technologies Inc	1.3%	1.4%	27,700	+0.0%	$3.3M
RHPRyman Hospitality Pptys Inc	1.3%	1.0%	25,000	+0.0%	$3.2M
RSGRepublic Svcs Inc	1.3%	1.5%	15,000	+0.0%	$3.2M
IBMInternational Business Machs	1.1%	1.1%	10,000	+0.0%	$2.8M
UNPUnion Pac Corp	1.0%	0.9%	8,800	+0.0%	$2.4M
CACICaci Intl Inc	0.9%	1.2%	5,000	+0.0%	$2.3M
VRTVertiv Holdings Co	0.8%	0.7%	6,000	+0.0%	$2.0M
NSCNorfolk Southn Corporation	0.8%	0.8%	6,000	+0.0%	$1.9M
WBDWarner Bros Discovery Inc	0.8%	0.8%	69,822	+0.0%	$1.9M
CVSCvs Health Corp	0.8%	0.6%	17,772	+0.0%	$1.8M
EXPEagle Matls Inc	0.7%	0.7%	8,000	+0.0%	$1.8M
TXNTexas Instrs Inc	0.7%	0.5%	6,026	+0.0%	$1.8M
VRSKVerisk Analytics Inc	0.6%	0.7%	8,500	+0.0%	$1.5M
AZNAstrazeneca Plc	0.6%	0.7%	7,500	+0.0%	$1.4M
GILDGilead Sciences Inc	0.5%	0.6%	10,000	+0.0%	$1.3M
VRTXVertex Pharmaceuticals Inc	0.5%	0.5%	2,500	+0.0%	$1.2M
SPGIS&p Global Inc	0.5%	0.6%	3,000	+0.0%	$1.2M
CHTRCharter Communications Inc	0.4%	0.7%	7,559	+0.0%	$1.1M
ZSZscaler Inc	0.4%	—	7,500	—	$1.1M
AMZNAmazon Com Inc	0.4%	0.3%	3,720	+0.0%	$887K
BIOBio Rad Labs Inc	0.4%	0.4%	3,000	+0.0%	$881K
WATWaters Corp	0.4%	—	2,338	—	$877K
EAElectronic Arts Inc	0.3%	0.4%	4,000	+0.0%	$820K
RTXRtx Corporation	0.3%	0.4%	4,127	+0.0%	$783K
MDUMDU Resources Group	0.3%	0.3%	35,000	+0.0%	$742K

What Westport Asset Management Inc bought and sold in Q2 2026, against Q1 2026.

New positions

Q1 2026's filing was too long to tell new positions apart.

Added to

No position grew by more than 5%.

Reduced

No position shrank by more than 5%.

Left the top 50

T At&t Incwas 0.4%
APD Air Products and Chemicals Iwas 0.3%

Share counts compared with the Q1 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: -2.6% /yr; S&P 500 +11.7%
3 years: +11.7% /yr; S&P 500 +22.3%
5 years: +3.5% /yr; S&P 500 +10.6%

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
Q2 2026	$244.9M	80
Q1 2026	$226.5M	78
Q4 2025	$239.7M	75
Q3 2025	$239.8M	75
Q2 2025	$226.3M	76
Q1 2025	$206.2M	74
Q4 2024	$209.0M	74
Q3 2024	$213.3M	74
Q2 2024	$199.8M	75
Q1 2024	$200.3M	73
Q4 2023	$185.9M	73
Q3 2023	$169.5M	73

Questions about Westport Asset Management Inc's portfolio

What stocks does Westport Asset Management Inc own?

Westport Asset Management Inc's latest 13F, for Q2 2026 and filed Aug 11, 2026, lists 80 positions worth $244.9M. The largest are Synopsys Inc (SNPS) at 9.4%, Willis Towers Watson PLC Ltd (WTW) at 7.4%, Covista Inc (CVSA) at 6.4%, Mgic Invt Corp Wis (MTG) at 5.1% and Universal Hlth Svcs Inc (UHS) at 4.0%.

What did Westport Asset Management Inc buy last quarter?

Westport Asset Management Inc opened no new positions and grew none by more than 5% among its largest holdings in Q2 2026.

What did Westport Asset Management Inc sell last quarter?

In Q2 2026, Westport Asset Management Inc cut from its top 50 At&t Inc (T) and cut from its top 50 Air Products and Chemicals I (APD), compared with its Q1 2026 filing.

How has Westport Asset Management Inc's portfolio performed?

A portfolio copying Westport Asset Management Inc's 20 largest 13F holdings each quarter, from the day each filing was public, returned +11.7% a year over the last 3 years, against +22.3% for the S&P 500. Over 1 year: -2.6% against +11.7%. Over 5 years: +3.5% a year against +10.6%.

When is Westport Asset Management Inc's next 13F filing due?

13F filings are due 45 days after each quarter ends. Westport Asset Management Inc's filing for the quarter ending Sep 30, 2026 is due by Nov 14, 2026; this page updates the day after it is published.