CIK: 0000811454
Total reported value
$226.5M
Reporting period: 2026-03-31 · Number of holdings: 78
WESTPORT ASSET MANAGEMENT INC disclosed 78 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $226.5M and a quarterly turnover rate of 37.9%.
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Westport Asset Management INC's disclosed holdings carry a Herfindahl concentration index of 0.038 — mathematically equivalent to about 26 equally-sized positions, well below its 78 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes vary widely across the portfolio (a coefficient of variation of 1.40), with a handful of outsized bets alongside many smaller positions.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Add LITE
0.0% $5.1M
Trim ORCL
0.0% -$5.1M
Trim SNPS
0.0% -$5.0M
Add IPGP
0.0% $2.7M
Trim WTW
0.0% -$3.8M
Trim ZBRA
0.0% -$3.0M
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | SNPS | Synopsys INC | Stock-Tech | 9.05% | -1.59% | — | |
| 2 | WTW | Willis Towers Watson Public Limited Company | Stock-Financials | 8.89% | -1.09% | — | |
| 3 | CVSA | Covista INC | Stock-Consumer Staples | 6.40% | +6.40% | NEW | |
| 4 | UHS | Universal Health Services-b | Stock-Healthcare | 5.14% | -0.41% | — | |
| 5 | MTG | Mgic Investment CORP | Stock-Financials | 5.09% | -0.11% | — | |
| 6 | IPGP | Ipg Photonics CORP | Stock-Tech | 3.92% | +1.36% | — | |
| 7 | ZBRA | Zebra Technologies Corp-cl A | Stock-Tech | 3.17% | -1.09% | — | |
| 8 | GOOG | Alphabet Inc-cl C | Stock-Comm Services | 3.04% | +0.60% | — | |
| 9 | DRI | Darden Restaurants INC | Stock-Consumer Disc | 3.03% | +0.25% | — | |
| 10 | LITE | Lumentum Holdings INC | Stock-Tech | 2.95% | +2.31% | — | |
| 11 | URI | United Rentals INC | Stock-Industrials | 2.57% | -0.62% | — | |
| 12 | EEM | Ishares Msci Emerging Market | ETF-Emerging Markets | 2.51% | +0.28% | — | |
| 13 | EOG | Eog Resources INC | Stock-Energy | 2.48% | +0.66% | — | |
| 14 | ORCL | Oracle CORP | Stock-Tech | 2.47% | -1.99% | — | |
| 15 | CHKP | Check Point Software Technologies Ltd. | Stock-Tech | 2.04% | -0.75% | — | |
| 16 | UBER | Uber Technologies INC | Stock-Industrials | 1.99% | -0.57% | — | |
| 17 | LIN | Linde plc | Stock-Materials | 1.97% | +0.19% | — | |
| 18 | PTC | Ptc INC | Stock-Tech | 1.96% | -0.67% | — | |
| 19 | RDN | Radian Group INC | Stock-Financials | 1.90% | -0.07% | — | |
| 20 | ROST | Ross Stores INC | Stock-Consumer Disc | 1.63% | +0.55% | — | |
| 21 | RSG | Republic Services INC | Stock-Industrials | 1.45% | +0.01% | — | |
| 22 | ROK | Rockwell Automation INC | Stock-Industrials | 1.43% | — | — | |
| 23 | COHREUR | Coherent INC | Stock-Other | 1.42% | +0.81% | — | |
| 24 | TSBK | Timberland Bancorp INC | Stock-Other | 1.41% | +0.29% | — | |
| 25 | AKAM | Akamai Technologies INC | Stock-Tech | 1.40% | +0.52% | — | |
| 26 | CARR | Carrier Global CORP | Stock-Industrials | 1.30% | — | — | |
| 27 | CACI | Caci International INC -cl A | Stock-Tech | 1.20% | +0.16% | — | |
| 28 | IBM | Intl Business Machines CORP | Stock-Tech | 1.07% | -0.11% | — | |
| 29 | RHP | Ryman Hospitality Properties | Stock-Real Estate | 1.02% | — | — | |
| 30 | ROG | Rogers CORP | Stock-Other | 0.97% | +0.28% | — | |
| 31 | UNP | Union Pacific CORP | Stock-Industrials | 0.94% | — | — | |
| 32 | WBD | Warner Bros Discovery INC | Stock-Comm Services | 0.85% | — | -12.53% | |
| 33 | NSC | Norfolk Southern CORP | Stock-Industrials | 0.76% | — | — | |
| 34 | CHTR | Charter Communications Inc-a | Stock-Comm Services | 0.72% | -0.15% | — | |
| 35 | VRSK | Verisk Analytics INC | Stock-Industrials | 0.71% | +0.71% | NEW | |
| 36 | EXP | Eagle Materials INC | Stock-Materials | 0.67% | -0.11% | — | |
| 37 | VRT | Vertiv Holdings Co-a | Stock-Industrials | 0.66% | +0.16% | -25.00% | |
| 38 | AZNN | Astrazeneca Plc-spons Adr | Stock-Other | 0.65% | +0.17% | -50.00% | |
| 39 | GILD | Gilead Sciences INC | Stock-Healthcare | 0.62% | +0.16% | — | |
| 40 | CVS | Cvs Health CORP | Stock-Healthcare | 0.56% | — | — | |
| 41 | SPGI | S&p Global INC | Stock-Financials | 0.56% | +0.56% | NEW | |
| 42 | TXN | Texas Instruments INC | Stock-Tech | 0.52% | — | — | |
| 43 | VRTX | Vertex Pharmaceuticals INC | Stock-Healthcare | 0.49% | +0.08% | — | |
| 44 | T | At&t INC | Stock-Comm Services | 0.41% | — | — | |
| 45 | BIO | Bio-rad Laboratories-a | Stock-Healthcare | 0.37% | — | — | |
| 46 | EA | Electronic Arts INC | Stock-Comm Services | 0.36% | — | — | |
| 47 | RTX | Rtx CORP | Stock-Industrials | 0.35% | +0.06% | — | |
| 48 | AMZN | Amazon.com INC | Stock-Consumer Disc | 0.34% | — | — | |
| 49 | APD | Air Products & Chemicals INC | Stock-Materials | 0.32% | — | — | |
| 50 | MDU | Mdu Resources Group INC | Stock-Utilities | 0.32% | +0.06% | — |
Performance for Q3 2026
-1.8%
Performance Last 4 Quarters
-3.9%
Based on 79% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 78 | $226.5M | 38 | |
| 2025-12-31 | 75 | $239.7M | 1 | |
| 2025-09-30 | 75 | $239.8M | 19 | |
| 2025-06-30 | 76 | $226.3M | 0 | |
| 2025-03-31 | 74 | $206.2M | 100 | |
| 2024-12-31 | 74 | $209.0M | 0 | |
| 2024-09-30 | 74 | $213.3M | 0 | |
| 2024-06-30 | 75 | $199.8M | 0 | |
| 2024-03-31 | 73 | $200.3M | 0 | |
| 2023-12-31 | 73 | $185.9M | 0 | |
| 2023-09-30 | 73 | $169.5M | 0 | |
| 2023-06-30 | 72 | $178.3M | 0 | |
| 2023-03-31 | 70 | $166.6M | 0 | |
| 2022-12-31 | 70 | $156.6M | 0 | |
| 2022-09-30 | 73 | $158.0M | 0 | |
| 2022-06-30 | 74 | $167.0M | 0 | |
| 2022-03-31 | 76 | $220.8M | 0 | |
| 2021-12-31 | 76 | $220.8M | 0 | |
| 2021-09-30 | 75 | $205.7M | 0 | |
| 2021-06-30 | 75 | $227.6M | 98 | |
| 2021-03-31 | 76 | $219.0M | 16 | |
| 2020-12-31 | 74 | $201.6M | 23 | |
| 2020-09-30 | 75 | $163.6M | 12 | |
| 2020-06-30 | 75 | $156.4M | 26 | |
| 2020-03-31 | 73 | $121.7M | 41 | |
| 2019-12-31 | 63 | $147.7M | 11 | |
| 2019-09-30 | 63 | $139.3M | 11 | |
| 2019-06-30 | 63 | $146.3M | 7 | |
| 2019-03-31 | 62 | $143.1M | 19 | |
| 2018-12-31 | 61 | $119.9M | 27 | |
| 2018-09-30 | 62 | $141.8M | 1 | |
| 2018-06-30 | 62 | $140.8M | 5 | |
| 2018-03-31 | 62 | $140.4M | 14 | |
| 2017-12-31 | 62 | $132.4M | 3 | |
| 2017-09-30 | 63 | $132.7M | 19 | |
| 2017-06-30 | 61 | $116.3M | 9 | |
| 2017-03-31 | 60 | $109.8M | 13 | |
| 2016-12-31 | 59 | $99.6M | 78 | |
| 2016-06-30 | 37 | $108.3M | 18 | |
| 2016-03-31 | 36 | $109.6M | 34 | |
| 2015-12-31 | 38 | $110.3M | 12 | |
| 2015-09-30 | 35 | $115.0M | 35 | |
| 2015-06-30 | 41 | $133.0M | 15 | |
| 2015-03-31 | 45 | $140.2M | 13 | |
| 2014-12-31 | 45 | $145.8M | 12 | |
| 2014-09-30 | 44 | $137.2M | 63 | |
| 2014-06-30 | 55 | $263.3M | 22 | |
| 2014-03-31 | 57 | $292.8M | 12 | |
| 2013-12-31 | 55 | $285.5M | 32 | |
| 2013-09-30 | 59 | $379.8M | 18 | |
| 2013-06-30 | 61 | $345.2M | 0 |
Westport Asset Management INC's most significant position changes for 2026-03-31: Sold out: Adtalem Global Education Inc.; New buy: Covista INC (CVSA); New buy: Verisk Analytics INC (VRSK); New buy: S&p Global INC (SPGI); Sold out: Skechers USA Inc-cl A (SKAA).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | LITE | Lumentum Holdings INC | +2.3% | — | Unchanged |
| 2 | IPGP | Ipg Photonics CORP | +1.4% | — | Unchanged |
| 3 | COHREUR | Coherent INC | +0.8% | — | Unchanged |
| 4 | EOG | Eog Resources INC | +0.7% | — | Unchanged |
| 5 | GOOG | Alphabet Inc-cl C | +0.6% | — | Unchanged |
| 6 | ROST | Ross Stores INC | +0.6% | — | Unchanged |
| 7 | AKAM | Akamai Technologies INC | +0.5% | — | Unchanged |
| 8 | TSBK | Timberland Bancorp INC | +0.3% | — | Unchanged |
| 9 | ROG | Rogers CORP | +0.3% | — | Unchanged |
| 10 | EEM | Ishares Msci Emerging Market | +0.3% | — | Unchanged |
| 11 | DRI | Darden Restaurants INC | +0.3% | — | Unchanged |
| 12 | LIN | Linde plc | +0.2% | — | Unchanged |
| 13 | AZNN | Astrazeneca Plc-spons Adr | +0.2% | -50.00% | Trim |
| 14 | VRT | Vertiv Holdings Co-a | +0.2% | -25.00% | Trim |
| 15 | GILD | Gilead Sciences INC | +0.2% | — | Unchanged |
| 16 | CACI | Caci International INC -cl A | +0.2% | — | Unchanged |
| 17 | VRTX | Vertex Pharmaceuticals INC | +0.1% | — | Unchanged |
| 18 | OXY | Occidental Petroleum CORP | +0.1% | — | Unchanged |
| 19 | NEM | Newmont CORP | +0.1% | — | Unchanged |
| 20 | ECG | Everus Construction Group | +0.1% | — | Unchanged |
| 21 | RTX | Rtx CORP | +0.1% | — | Unchanged |
| 22 | MDU | Mdu Resources Group INC | +0.1% | — | Unchanged |
| 23 | RSG | Republic Services INC | 0% | — | Unchanged |
| 24 | CARR | Carrier Global CORP | — | — | Unchanged |
| 25 | CRWD | Crowdstrike Holdings INC - A | 0% | — | Unchanged |
| 26 | ABT | Abbott Laboratories | 0% | — | Unchanged |
| 27 | RDN | Radian Group INC | -0.1% | — | Unchanged |
| 28 | FMC | Fmc CORP | -0.1% | — | Unchanged |
| 29 | MTG | Mgic Investment CORP | -0.1% | — | Unchanged |
| 30 | IBM | Intl Business Machines CORP | -0.1% | — | Unchanged |
| 31 | EXP | Eagle Materials INC | -0.1% | — | Unchanged |
| 32 | CHTR | Charter Communications Inc-a | -0.2% | — | Unchanged |
| 33 | UHS | Universal Health Services-b | -0.4% | — | Unchanged |
| 34 | UBER | Uber Technologies INC | -0.6% | — | Unchanged |
| 35 | URI | United Rentals INC | -0.6% | — | Unchanged |
| 36 | PTC | Ptc INC | -0.7% | — | Unchanged |
| 37 | CHKP | Check Point Software Technologies Ltd. | -0.8% | — | Unchanged |
| 38 | WTW | Willis Towers Watson Public Limited Company | -1.1% | — | Unchanged |
| 39 | ZBRA | Zebra Technologies Corp-cl A | -1.1% | — | Unchanged |
| 40 | SNPS | Synopsys INC | -1.6% | — | Unchanged |
| 41 | ORCL | Oracle CORP | -2% | — | Unchanged |
| 42 | ✓ | Adtalem Global Education Inc. | — | EXIT | Sold out |
| 43 | CVSA | Covista INC | — | NEW | New buy |
| 44 | VRSK | Verisk Analytics INC | — | NEW | New buy |
| 45 | SPGI | S&p Global INC | — | NEW | New buy |
| 46 | SKAA | Skechers USA Inc-cl A | — | EXIT | Sold out |
| 47 | WAT | Waters CORP | — | NEW | New buy |
| 48 | NTR | Nutrien LTD | — | EXIT | Sold out |
| 49 | ZS | Zscaler INC | — | NEW | New buy |
| 50 | BDX | Becton Dickinson And Co | — | NEW | New buy |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-05-15 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-02-04 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-11-12 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-08-12 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-05-14 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-02-14 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-11-13 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-08-12 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-05-14 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-02-09 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-11-13 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-08-14 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-05-15 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-02-14 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-11-14 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-08-15 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-05-12 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-02-14 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-11-12 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-08-11 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-05-11 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-02-11 | 13F-HR | View on EDGAR |
| 2020-09-30 | 2020-11-10 | 13F-HR | View on EDGAR |
| 2020-06-30 | 2020-08-12 | 13F-HR | View on EDGAR |
| 2020-03-31 | 2020-05-08 | 13F-HR | View on EDGAR |
| 2019-12-31 | 2020-02-11 | 13F-HR | View on EDGAR |
| 2019-09-30 | 2019-11-12 | 13F-HR | View on EDGAR |
| 2019-06-30 | 2019-08-09 | 13F-HR | View on EDGAR |
| 2019-03-31 | 2019-05-13 | 13F-HR | View on EDGAR |
| 2018-12-31 | 2019-02-07 | 13F-HR | View on EDGAR |
| 2018-09-30 | 2018-11-15 | 13F-HR | View on EDGAR |
| 2018-06-30 | 2018-08-14 | 13F-HR | View on EDGAR |
| 2018-03-31 | 2018-05-02 | 13F-HR | View on EDGAR |
| 2017-12-31 | 2018-02-22 | 13F-HR | View on EDGAR |
| 2017-09-30 | 2017-11-15 | 13F-HR | View on EDGAR |
| 2017-06-30 | 2017-08-03 | 13F-HR | View on EDGAR |
| 2017-03-31 | 2017-05-03 | 13F-HR | View on EDGAR |
| 2016-12-31 | 2017-03-09 | 13F-HR | View on EDGAR |
| 2016-06-30 | 2016-08-15 | 13F-HR | View on EDGAR |
| 2016-03-31 | 2016-05-13 | 13F-HR | View on EDGAR |
| 2015-12-31 | 2016-02-11 | 13F-HR | View on EDGAR |
| 2015-09-30 | 2015-11-10 | 13F-HR | View on EDGAR |
| 2015-06-30 | 2015-08-12 | 13F-HR | View on EDGAR |
| 2015-03-31 | 2015-05-13 | 13F-HR | View on EDGAR |
| 2014-12-31 | 2015-02-11 | 13F-HR | View on EDGAR |
| 2014-09-30 | 2014-11-13 | 13F-HR | View on EDGAR |
| 2014-06-30 | 2014-08-14 | 13F-HR | View on EDGAR |
| 2014-03-31 | 2014-05-09 | 13F-HR | View on EDGAR |
| 2013-12-31 | 2014-02-11 | 13F-HR | View on EDGAR |
| 2013-09-30 | 2013-11-14 | 13F-HR | View on EDGAR |
| 2013-06-30 | 2013-08-08 | 13F-HR | View on EDGAR |
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