Westport Asset Management Inc holds a focused book of 80 reported positions worth $244.9M as of Q2 2026 (disclosed Aug 11, 2026, a ~42-day 13F lag). This quarter Honeywell Aerospace Inc first appears in 13F filings, a listing rather than a purchase; they opened Honeywell International Inc and trimmed Everus Construction Group. Their largest long position is Synopsys Inc at 9% of the reported non-option book. Cloning the disclosed picks since 2024 would be +22% (+8.7%/yr). That is a simulation of the disclosed long book, not audited returns.
Following at the filing date actually beat the quarter-end book by 6.2 points over this window.
Growth of $10,000 cloning Westport Asset Management Inc's disclosed long 13F book, rebalanced on each filing date (so it reflects each quarter's actual reporting lag, ~42 days for the latest filing, with no look-ahead), total-return basis (dividends reinvested), derived from end-of-day prices. “Their reported book” values the same picks from quarter-end, before they were public. S&P 500 is SPY total return over the same window. Excludes shorts, cash, options and non-13F holdings. Not investment advice.
Top-heavy: focused book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
92% mapped to company sectors
+5 sectors below the cut, 9% together
Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.
Estimated $ traded · quarter-end prices (an exit at the prior quarter-end), no cost basis
Other tracked managers holding the same core names as Westport Asset Management Inc
| Manager / fund | Shared names | Their $ in those |
|---|---|---|
| J. Stern & Co. LLP | 9 / 80 | $428.6M |
| Stonehage Fleming Financial Services Holdings Ltd | 17 / 80 | $1.0B |
| Kenora Financial, LLC | 20 / 80 | $101.7M |
| M. Kraus & Co | 14 / 80 | $116.4M |
| Ithaka Group LLC | 9 / 80 | $157.0M |
| N10 Assets, LLC | 8 / 80 | $65.6M |
| Provident Investment Management, Inc. | 11 / 80 | $286.0M |
| Indivisible Partners | 36 / 80 | $483.3M |
Ranked by the share of each fund's own book sitting in the names it shares with Westport Asset Management Inc: only funds sharing at least a tenth of the book qualify. Index giants, bank custody books and market makers are excluded. They hold everything, so their overlap says nothing.
Bars show each position's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Synopsys Inc COM | $23.1M | 51.7K | 9.4% | —Held | |
| 2 | Willis Towers Watson PLC COM | $18.1M | 69.2K | 7.4% | —Held | |
| 3 | Covista Inc COM | $15.7M | 125.8K | 6.4% | —Held | |
| 4 | MGIC Investment Corp COM | $12.4M | 439.0K | 5.1% | —Held | |
| 5 | Universal Health Services Inc COM | $9.7M | 65.1K | 3.9% | —Held | |
| 6 | IPG Photonics Corp COM | $9.1M | 77.5K | 3.7% | —Held | |
| 7 | United Rentals Inc COM | $9.1M | 8.0K | 3.7% | —Held | |
| 8 | Zebra Technologies Corp COM | $9.0M | 34.3K | 3.7% | —Held | |
| 9 | Alphabet Inc COM | $8.5M | 24.0K | 3.5% | —Held | |
| 10 | Lumentum Holdings Inc COM | $8.2M | 9.5K | 3.3% | —Held | |
| 11 | Darden Restaurants Inc COM | $7.2M | 35.0K | 2.9% | —Held | |
| 12 | iShares MSCI Emerging Markets COM | $6.8M | 100.0K | 2.8% | —Held | |
| 13 | Oracle Corp COM | $5.6M | 38.0K | 2.3% | —Held | |
| 14 | Coherent Inc COM | $5.3M | 13.5K | 2.2% | —Held | |
| 15 | EOG Resources Inc COM | $5.0M | 38.9K | 2.1% | —Held | |
| 16 | Radian Group Inc COM | $4.9M | 130.4K | 2.0% | —Held | |
| 17 | Linde PLC COM | $4.7M | 9.0K | 1.9% | —Held | |
| 18 | Uber Technologies Inc COM | $4.5M | 62.6K | 1.8% | —Held | |
| 19 | Rockwell Automation Inc COM | $4.5M | 9.0K | 1.8% | —Held | |
| 20 | Check Point Software Technolog COM | $4.2M | 32.3K | 1.7% | —Held | |
| 21 | Carrier Global Corp COM | $3.8M | 52.4K | 1.6% | —Held | |
| 22 | Timberland Bancorp Inc COM | $3.6M | 80.9K | 1.5% | —Held | |
| 23 | Ross Stores Inc COM | $3.6M | 17.0K | 1.5% | —Held | |
| 24 | PTC Inc COM | $3.5M | 31.1K | 1.4% | —Held | |
| 25 | Rogers Corp COM | $3.3M | 20.5K | 1.4% | —Held | |
| 26 | Akamai Technologies, Inc. COM | $3.3M | 27.7K | 1.3% | —Held | |
| 27 | Ryman Hospitality Properties I COM | $3.2M | 25.0K | 1.3% | —Held | |
| 28 | Republic Services Inc COM | $3.2M | 15.0K | 1.3% | —Held | |
| 29 | International Business Machine COM | $2.8M | 10.0K | 1.1% | —Held | |
| 30 | Union Pacific Corp COM | $2.4M | 8.8K | 1.0% | —Held | |
| 31 | CACI International Inc COM | $2.3M | 5.0K | 0.9% | —Held | |
| 32 | Vertiv Holdings Co. COM | $2.0M | 6.0K | 0.8% | —Held | |
| 33 | Norfolk Southern Corp COM | $1.9M | 6.0K | 0.8% | —Held | |
| 34 | Warner Bros. Discovery, Inc. COM | $1.9M | 69.8K | 0.8% | —Held | |
| 35 | CVS Health Corp COM | $1.8M | 17.8K | 0.8% | —Held | |
| 36 | Eagle Materials Inc COM | $1.8M | 8.0K | 0.7% | —Held | |
| 37 | Texas Instruments Inc COM | $1.8M | 6.0K | 0.7% | —Held | |
| 38 | Verisk Analytics Inc COM | $1.5M | 8.5K | 0.6% | —Held | |
| 39 | AstraZeneca PLC COM | $1.4M | 7.5K | 0.6% | —Held | |
| 40 | Gilead Sciences Inc COM | $1.3M | 10.0K | 0.5% | —Held | |
| 41 | Vertex Pharmaceuticals Inc COM | $1.2M | 2.5K | 0.5% | —Held | |
| 42 | S&P Global Inc COM | $1.2M | 3.0K | 0.5% | —Held | |
| 43 | Charter Communications Inc COM | $1.1M | 7.6K | 0.4% | —Held | |
| 44 | Zscaler Inc COM | $1.1M | 7.5K | 0.4% | ▲+67% Added · +3K sh | |
| 45 | Amazon.com Inc COM | $887K | 3.7K | 0.4% | —Held | |
| 46 | Bio-Rad Laboratories Inc COM | $881K | 3.0K | 0.4% | —Held | |
| 47 | Waters Corp COM | $877K | 2.3K | 0.4% | —Held | |
| 48 | Electronic Arts Inc. COM | $820K | 4.0K | 0.3% | —Held | |
| 49 | Raytheon Technologies Corp COM | $783K | 4.1K | 0.3% | —Held | |
| 50 | MDU Resources Group Inc COM | $742K | 35.0K | 0.3% | —Held |
This fund page is the Follow view. The Build view lets your agent pull holdings, quarter changes, overlap, and source filings through API or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/funds/811454/holdings"
Use Arkolith to show WESTPORT ASSET MANAGEMENT INC's latest holdings, largest changes, and filing provenance.
As-of date vs the date the SEC received each filing
Reported 13F total per quarter. Raw filing totals can include option notional.
| Quarter | As of | Filed | Lag | Positions | Value | Form |
|---|---|---|---|---|---|---|
| Q2 2026 | Jun 30, 2026 | Aug 11, 2026 | 42d | 80 | $244.9M | 13F-HR |
| Q1 2026 | Mar 31, 2026 | May 15, 2026 | 45d | 78 | $226.5M | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Feb 4, 2026 | 35d | 75 | $239.7M | 13F-HR |
| Q3 2025 | Sep 30, 2025 | Nov 12, 2025 | 43d | 75 | $239.8M | 13F-HR |
| Q2 2025 | Jun 30, 2025 | Aug 12, 2025 | 43d | 76 | $226.3M | 13F-HR |
| Q1 2025 | Mar 31, 2025 | May 14, 2025 | 44d | 74 | $206.2M | 13F-HR |
| Q4 2024 | Dec 31, 2024 | Feb 14, 2025 | 45d | 74 | $209.0M | 13F-HR |
| Q3 2024 | Sep 30, 2024 | Nov 13, 2024 | 44d | 74 | $213.3M | 13F-HR |
| Q2 2024 | Jun 30, 2024 | Aug 12, 2024 | 43d | 75 | $199.8M | 13F-HR |
| Q1 2024 | Mar 31, 2024 | May 14, 2024 | 44d | 73 | $200.3M | 13F-HR |
Holdings from SEC EDGAR 13F-HR filings, updated quarterly, filed up to 45 days after quarter-end. Public domain. Book totals and portfolio weights cover reported non-option positions, which can include notes and warrants. Disclosed put/call options are listed separately and excluded from those totals. The performance line is a simulation of the disclosed long book, not an audited return.