CIK: 0001533551
Total reported value
$952.5M
Reporting period: 2026-03-31 · Number of holdings: 54
Wellesley Asset Management disclosed 54 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $952.5M and a quarterly turnover rate of 45.6%.
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Wellesley Asset Management's disclosed holdings carry a Herfindahl concentration index of 0.028 — mathematically equivalent to about 35 equally-sized positions, close to its 54 actual disclosed holdings. Value is spread relatively evenly across the portfolio rather than concentrated in a handful of names.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 0.74), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Sector classification currently covers about 68% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
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Add GWRE 1.25 11-01-29
+705.9% $26.0M
Add LMAT 2.5 02-01-30
+510.3% $18.0M
Add DBX 0 03-01-28
+459.2% $15.9M
Add DDOG 0 12-01-29
+97.4% $14.2M
Add CMS 3.375 05-01-28
+479.7% $12.7M
Trim ALRM 2.25 06-01-29
-67.7% -$11.4M
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | BOX 1.5 09-15-29 | Box INC | Stock-Tech | 4.76% | +0.25% | +14.01% | |
| 2 | VSH 2.25 09-15-30 | Vishay Intertechnology | Stock-Other | 4.15% | +0.45% | +5.98% | |
| 3 | SYNA 0.75 12-01-31 | Synaptics INC | Stock-Other | 3.80% | -0.54% | -12.36% | |
| 4 | PCG 4.25 12-01-27 | Pg&e CORP | Stock-Utilities | 3.73% | -0.25% | -7.87% | |
| 5 | HAE 2.5 06-01-29 | Haemonetics CORP | Stock-Other | 3.65% | -0.76% | -6.34% | |
| 6 | ITRI 1.375 07-15-30 | Itron INC | Stock-Tech | 3.61% | -0.23% | -0.38% | |
| 7 | AKAM 0.375 09-01-27 | Akamai Technologies INC | Stock-Tech | 3.56% | +0.50% | -1.34% | |
| 8 | BL 1 06-01-29 | Blackline INC | Stock-Tech | 3.54% | -0.22% | +6.82% | |
| 9 | GBX 2.875 04-15-28 | Greenbrier Cos INC | Stock-Other | 3.47% | -0.31% | -14.88% | |
| 10 | MTH 1.75 05-15-28 | Meritage Homes CORP | Stock-Consumer Disc | 3.45% | — | -0.50% | |
| 11 | ON 0.5 03-01-29 | On Semiconductor CORP | Stock-Tech | 3.36% | — | -1.10% | |
| 12 | LIVN 2.5 03-15-29 | Livanova PLC | Stock-Other | 3.20% | -0.89% | -19.13% | |
| 13 | GWRE 1.25 11-01-29 | Guidewire Software INC | Stock-Tech | 3.18% | +2.73% | +705.85% | |
| 14 | FOUR 0.5 08-01-27 | Shift4 Payments INC | Stock-Tech | 3.10% | — | -0.14% | |
| 15 | DDOG 0 12-01-29 | Datadog INC | Stock-Tech | 3.09% | +1.50% | +97.39% | |
| 16 | PSN 2.625 03-01-29 | Parsons CORP | Stock-Tech | 2.94% | +0.38% | +24.87% | |
| 17 | MCHP 0.75 06-01-30 | Microchip Technology INC | Stock-Tech | 2.91% | +2.91% | NEW | |
| 18 | GPN 1.5 03-01-31 | Global Payments INC | Stock-Industrials | 2.81% | +0.30% | +19.63% | |
| 19 | NVST 1.75 08-15-28 | Envista Holdings CORP | Stock-Healthcare | 2.67% | +2.67% | NEW | |
| 20 | WGO 3.25 01-15-30 | Winnebago Industries | Stock-Other | 2.52% | -0.18% | -3.44% | |
| 21 | AMPH 2 03-15-29 | Amphastar Pharmaceutical | Stock-Other | 2.48% | -0.26% | -8.59% | |
| 22 | PRGS 3.5 03-01-30 | Progress Software CORP | Stock-Other | 2.33% | +0.62% | +58.97% | |
| 23 | RGEN 1 12-15-28 | Repligen CORP | Stock-Healthcare | 2.32% | -0.44% | +1.49% | |
| 24 | LMAT 2.5 02-01-30 | Lemaitre Vascular INC | Stock-Other | 2.23% | +1.89% | +510.31% | |
| 25 | DBX 0 03-01-28 | Dropbox INC | Stock-Tech | 2.09% | +1.67% | +459.23% | |
| 26 | AKAM 1.125 02-15-29 | Akamai Technologies INC | Stock-Tech | 2.07% | — | -5.51% | |
| 27 | LYFT 0.625 03-01-29 | Lyft INC | Stock-Tech | 2.07% | -0.61% | -8.34% | |
| 28 | LNTH 2.625 12-15-27 | Lantheus Holdings INC | Stock-Healthcare | 1.82% | — | -2.25% | |
| 29 | OMCL 1 12-01-29 | Omnicell INC | Stock-Healthcare | 1.81% | — | +13.21% | |
| 30 | CMS 3.375 05-01-28 | Cms Energy CORP | Stock-Utilities | 1.59% | +1.33% | +479.65% | |
| 31 | PPL 2.875 03-15-28 | Ppl Capital Funding INC | Stock-Utilities | 1.14% | -0.37% | -29.83% | |
| 32 | LCII 3 03-01-30 | Lci Industries | Stock-Consumer Disc | 1.04% | +1.04% | NEW | |
| 33 | SPB 3.375 06-01-29 | Spectrum Brands INC | Stock-Other | 0.96% | — | +2.90% | |
| 34 | AVAV 0 07-15-30 | Aerovironment INC | Stock-Industrials | 0.82% | +0.82% | NEW | |
| 35 | PCRX 2.125 05-15-29 | Pacira Biosciences INC | Stock-Other | 0.74% | +0.22% | +44.01% | |
| 36 | ARRY 1 12-01-28 | Array Technologies INC | Stock-Other | 0.70% | +0.70% | NEW | |
| 37 | WKC 3.25 07-01-28 | World Kinect Group | Stock-Other | 0.63% | — | +26.01% | |
| 38 | JAZZ 3.125 09-15-30 | Jazz Investments I LTD | Stock-Healthcare | 0.60% | +0.60% | NEW | |
| 39 | ALRM 2.25 06-01-29 | Alarm.com Hldgs INC | Stock-Other | 0.55% | -1.18% | -67.65% | |
| 40 | SO 4.5 06-15-27 | Southern Co | Stock-Utilities | 0.47% | +0.47% | NEW | |
| 41 | LYV 2.875 01-15-30 | Live Nation Entertainmen | Stock-Comm Services | 0.47% | +0.47% | NEW | |
| 42 | CNP 4.25 08-15-26 | Centerpoint Energy INC | Stock-Utilities | 0.46% | — | -1.95% | |
| 43 | CAKE 2 03-15-30 | Cheesecake Factory (the) | Stock-Consumer Disc | 0.43% | +0.43% | NEW | |
| 44 | BMRN 1.25 05-15-27 | Biomarin Pharmaceutical | Stock-Healthcare | 0.41% | — | -1.06% | |
| 45 | FLR 1.125 08-15-29 | Fluor CORP | Stock-Industrials | 0.35% | -0.20% | -6.82% | |
| 46 | COGT 1.625 11-15-31 | Cogent Biosciences INC | Stock-Other | 0.34% | — | +15.63% | |
| 47 | TTEK 2.25 08-15-28 | Tetra Tech INC | Stock-Industrials | 0.32% | -0.23% | -0.12% | |
| 48 | POST 2.5 08-15-27 | Post Holdings INC | Stock-Consumer Staples | 0.28% | — | — | |
| 49 | NTNX 0.5 12-15-29 | Nutanix INC | Stock-Tech | 0.26% | +0.26% | NEW | |
| 50 | COLL 2.875 02-15-29 | Collegium Pharma INC | Stock-Other | 0.26% | -0.32% | +3.13% |
Performance for Q3 2026
—
Performance Last 4 Quarters
—
Based on 0 months of available history
Based on 0% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings | |
|---|---|---|---|---|---|
| 2026 Q1 | 54 | $952.5M | 46 | ||
| 2025 Q4 | 54 | $960.8M | 54 | ||
| 2025 Q3 | 56 | $998.8M | 71 | ||
| 2025 Q2 | 64 | $1.0B | 0 | ||
| 2025 Q1 | 61 | $1.0B | 100 | ||
| 2024 Q4 | 58 | $962.3M | 0 | ||
| 2024 Q3 | 49 | $1.0B | 0 | ||
| 2024 Q2 | 48 | $944.5M | 0 | ||
| 2024 Q1 | 55 | $990.3M | 0 | ||
| 2023 Q4 | 39 | $1.0B | 0 | ||
| 2023 Q3 | 37 | $1.0B | 0 | ||
| 2023 Q2 | 42 | $1.2B | 0 | ||
| 2023 Q1 | 47 | $1.4B | 0 | ||
| 2022 Q4 | 48 | $1.5M | 0 | ||
| 2022 Q3 | 65 | $1.4M | 0 | ||
| 2022 Q2 | 55 | $1.5M | 0 | ||
| 2022 Q1 | 68 | $1.5M | 0 | ||
| 2021 Q4 | 48 | $1.2M | 0 | ||
| 2021 Q3 | 57 | $1.2M | 0 | ||
| 2021 Q2 | 31 | $833.9K | 100 | ||
| 2021 Q1 | 31 | $833.9K | 59 | ||
| 2020 Q4 | 34 | $864.3K | 76 | ||
| 2020 Q3 | 40 | $901.8K | 68 | ||
| 2020 Q2 | 40 | $832.3K | 41 | ||
| 2020 Q1 | 46 | $849.5K | 48 | ||
| 2019 Q4 | 45 | $1.2M | 28 | ||
| 2019 Q3 | 60 | $1.5M | 23 | ||
| 2019 Q2 | 56 | $1.5M | 33 | ||
| 2019 Q1 | 60 | $1.4M | 100 | ||
| 2018 Q4 | 76 | $1.5B | 100 | ||
| 2018 Q3 | 68 | $1.6M | 40 | ||
| 2018 Q2 | 65 | $1.7M | 56 | ||
| 2018 Q1 | 68 | $1.9M | 43 | ||
| 2017 Q4 | 59 | $1.9M | 37 | ||
| 2017 Q3 | 62 | $1.9M | 38 | ||
| 2017 Q2 | 67 | $1.9M | 21 | ||
| 2017 Q1 | 64 | $1.9M | 100 | ||
| 2016 Q4 | 71 | $1.9B | 39 | ||
| 2016 Q3 | 71 | $1.9B | 26 | ||
| 2016 Q2 | 75 | $1.8B | 29 | ||
| 2016 Q1 | 76 | $1.7B | 100 | ||
| 2015 Q4 | 72 | $1.8M | 20 | ||
| 2015 Q3 | 79 | $1.7M | 26 | ||
| 2015 Q2 | 78 | $1.7M | 29 | ||
| 2015 Q1 | 74 | $1.7M | 100 | ||
| 2014 Q4 | 89 | $1.7B | 100 | ||
| 2014 Q3 | 81 | $1.6M | 28 | ||
| 2014 Q2 | 80 | $1.6M | 48 | ||
| 2014 Q1 | 91 | $1.6M | 50 | ||
| 2013 Q4 | 92 | $1.4M | 30 | ||
| 2013 Q3 | 91 | $1.4M | 24 | ||
| 2013 Q2 | 92 | $1.2M | 43 |
Wellesley Asset Management's most significant position changes for 2026-03-31: Sold out: Ford Motor Company (F 0 03-15-26); New buy: Microchip Technology INC (MCHP 0.75 06-01-30); New buy: Envista Holdings CORP (NVST 1.75 08-15-28); Sold out: Spotify USA INC (SPOT 0 03-15-26); Sold out: Jbt Marel CORP (JBTM 0.25 05-15-26).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | GWRE 1.25 11-01-29 | Guidewire Software INC | +2.7% | +705.85% | Add |
| 2 | LMAT 2.5 02-01-30 | Lemaitre Vascular INC | +1.9% | +510.31% | Add |
| 3 | DBX 0 03-01-28 | Dropbox INC | +1.7% | +459.23% | Add |
| 4 | DDOG 0 12-01-29 | Datadog INC | +1.5% | +97.39% | Add |
| 5 | CMS 3.375 05-01-28 | Cms Energy CORP | +1.3% | +479.65% | Add |
| 6 | PRGS 3.5 03-01-30 | Progress Software CORP | +0.6% | +58.97% | Add |
| 7 | AKAM 0.375 09-01-27 | Akamai Technologies INC | +0.5% | -1.34% | Trim |
| 8 | VSH 2.25 09-15-30 | Vishay Intertechnology | +0.5% | +5.98% | Add |
| 9 | PSN 2.625 03-01-29 | Parsons CORP | +0.4% | +24.87% | Add |
| 10 | GPN 1.5 03-01-31 | Global Payments INC | +0.3% | +19.63% | Add |
| 11 | BOX 1.5 09-15-29 | Box INC | +0.3% | +14.01% | Add |
| 12 | PCRX 2.125 05-15-29 | Pacira Biosciences INC | +0.2% | +44.01% | Add |
| 13 | WGO 3.25 01-15-30 | Winnebago Industries | -0.2% | -3.44% | Trim |
| 14 | FLR 1.125 08-15-29 | Fluor CORP | -0.2% | -6.82% | Trim |
| 15 | BL 1 06-01-29 | Blackline INC | -0.2% | +6.82% | Add |
| 16 | ITRI 1.375 07-15-30 | Itron INC | -0.2% | -0.38% | Trim |
| 17 | TTEK 2.25 08-15-28 | Tetra Tech INC | -0.2% | -0.12% | Trim |
| 18 | PCG 4.25 12-01-27 | Pg&e CORP | -0.3% | -7.87% | Trim |
| 19 | AMPH 2 03-15-29 | Amphastar Pharmaceutical | -0.3% | -8.59% | Trim |
| 20 | GBX 2.875 04-15-28 | Greenbrier Cos INC | -0.3% | -14.88% | Trim |
| 21 | COLL 2.875 02-15-29 | Collegium Pharma INC | -0.3% | +3.13% | Add |
| 22 | PPL 2.875 03-15-28 | Ppl Capital Funding INC | -0.4% | -29.83% | Trim |
| 23 | RGEN 1 12-15-28 | Repligen CORP | -0.4% | +1.49% | Add |
| 24 | SYNA 0.75 12-01-31 | Synaptics INC | -0.5% | -12.36% | Trim |
| 25 | LYFT 0.625 03-01-29 | Lyft INC | -0.6% | -8.34% | Trim |
| 26 | HAE 2.5 06-01-29 | Haemonetics CORP | -0.8% | -6.34% | Trim |
| 27 | LIVN 2.5 03-15-29 | Livanova PLC | -0.9% | -19.13% | Trim |
| 28 | ALRM 2.25 06-01-29 | Alarm.com Hldgs INC | -1.2% | -67.65% | Trim |
| 29 | F 0 03-15-26 | Ford Motor Company | — | EXIT | Sold out |
| 30 | MCHP 0.75 06-01-30 | Microchip Technology INC | — | NEW | New buy |
| 31 | NVST 1.75 08-15-28 | Envista Holdings CORP | — | NEW | New buy |
| 32 | SPOT 0 03-15-26 | Spotify USA INC | — | EXIT | Sold out |
| 33 | JBTM 0.25 05-15-26 | Jbt Marel CORP | — | EXIT | Sold out |
| 34 | LNT 3.875 03-15-26 | Alliant Energy CORP | — | EXIT | Sold out |
| 35 | ENOV 3.875 10-15-28 | Enovis CORP | — | EXIT | Sold out |
| 36 | FE 4 05-01-26 | Firstenergy CORP | — | EXIT | Sold out |
| 37 | LCII 3 03-01-30 | Lci Industries | — | NEW | New buy |
| 38 | ORA 2.5 07-15-27 | Ormat Technologies INC | — | EXIT | Sold out |
| 39 | AVAV 0 07-15-30 | Aerovironment INC | — | NEW | New buy |
| 40 | ARRY 1 12-01-28 | Array Technologies INC | — | NEW | New buy |
| 41 | JAZZ 3.125 09-15-30 | Jazz Investments I LTD | — | NEW | New buy |
| 42 | SO 4.5 06-15-27 | Southern Co | — | NEW | New buy |
| 43 | LYV 2.875 01-15-30 | Live Nation Entertainmen | — | NEW | New buy |
| 44 | CSWC 5.125 11-15-29 | Capital Southwest CORP | — | EXIT | Sold out |
| 45 | CAKE 2 03-15-30 | Cheesecake Factory (the) | — | NEW | New buy |
| 46 | MKSI 1.25 06-01-30 | Mks INC | — | EXIT | Sold out |
| 47 | TYL 0.25 03-15-26 | Tyler Technologies INC | — | EXIT | Sold out |
| 48 | DUK 4.125 04-15-26 | Duke Energy CORP | — | EXIT | Sold out |
| 49 | CSGS 3.875 09-15-28 | Csg Systems Internationa | — | EXIT | Sold out |
| 50 | NTNX 0.5 12-15-29 | Nutanix INC | — | NEW | New buy |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026 Q1 | 2026-05-11 | 13F-HR | View on EDGAR |
| 2025 Q4 | 2026-02-06 | 13F-HR | View on EDGAR |
| 2025 Q4 | 2026-02-06 | Amendment | View on EDGAR |
| 2025 Q3 | 2025-10-21 | 13F-HR | View on EDGAR |
| 2025 Q2 | 2025-08-05 | 13F-HR | View on EDGAR |
| 2025 Q1 | 2025-05-02 | 13F-HR | View on EDGAR |
| 2024 Q4 | 2025-01-27 | 13F-HR | View on EDGAR |
| 2024 Q3 | 2024-10-23 | 13F-HR | View on EDGAR |
| 2024 Q2 | 2024-08-07 | 13F-HR | View on EDGAR |
| 2024 Q1 | 2024-05-14 | 13F-HR | View on EDGAR |
| 2023 Q4 | 2024-02-09 | 13F-HR | View on EDGAR |
| 2023 Q3 | 2023-11-13 | 13F-HR | View on EDGAR |
| 2023 Q3 | 2023-11-13 | Amendment | View on EDGAR |
| 2023 Q2 | 2023-08-14 | 13F-HR | View on EDGAR |
| 2023 Q1 | 2023-05-15 | 13F-HR | View on EDGAR |
| 2022 Q4 | 2023-02-10 | 13F-HR | View on EDGAR |
| 2022 Q3 | 2022-11-14 | 13F-HR | View on EDGAR |
| 2022 Q2 | 2022-08-15 | 13F-HR | View on EDGAR |
| 2022 Q1 | 2022-05-16 | 13F-HR | View on EDGAR |
| 2021 Q4 | 2022-02-14 | 13F-HR | View on EDGAR |
| 2021 Q3 | 2021-11-15 | 13F-HR | View on EDGAR |
| 2021 Q2 | 2021-08-13 | 13F-HR | View on EDGAR |
| 2021 Q1 | 2021-05-11 | 13F-HR | View on EDGAR |
| 2020 Q4 | 2021-03-01 | Amendment | View on EDGAR |
| 2020 Q4 | 2021-02-16 | 13F-HR | View on EDGAR |
| 2020 Q3 | 2020-11-13 | 13F-HR | View on EDGAR |
| 2020 Q2 | 2020-08-13 | 13F-HR | View on EDGAR |
| 2020 Q1 | 2020-05-14 | 13F-HR | View on EDGAR |
| 2019 Q4 | 2020-02-13 | 13F-HR | View on EDGAR |
| 2019 Q3 | 2019-11-12 | 13F-HR | View on EDGAR |
| 2019 Q2 | 2019-08-09 | 13F-HR | View on EDGAR |
| 2019 Q1 | 2019-05-07 | 13F-HR | View on EDGAR |
| 2018 Q4 | 2019-02-07 | 13F-HR | View on EDGAR |
| 2018 Q3 | 2018-11-13 | 13F-HR | View on EDGAR |
| 2018 Q2 | 2018-08-13 | 13F-HR | View on EDGAR |
| 2018 Q1 | 2018-05-11 | 13F-HR | View on EDGAR |
| 2017 Q4 | 2018-02-09 | 13F-HR | View on EDGAR |
| 2017 Q3 | 2017-11-13 | 13F-HR | View on EDGAR |
| 2017 Q2 | 2017-08-11 | 13F-HR | View on EDGAR |
| 2017 Q1 | 2017-05-12 | 13F-HR | View on EDGAR |
| 2016 Q4 | 2017-02-13 | 13F-HR | View on EDGAR |
| 2016 Q3 | 2016-11-10 | 13F-HR | View on EDGAR |
| 2016 Q2 | 2016-08-10 | 13F-HR | View on EDGAR |
| 2016 Q1 | 2016-05-12 | 13F-HR | View on EDGAR |
| 2015 Q4 | 2016-02-12 | 13F-HR | View on EDGAR |
| 2015 Q3 | 2015-11-12 | 13F-HR | View on EDGAR |
| 2015 Q2 | 2015-08-11 | 13F-HR | View on EDGAR |
| 2015 Q1 | 2015-05-08 | 13F-HR | View on EDGAR |
| 2014 Q4 | 2015-02-11 | 13F-HR | View on EDGAR |
| 2014 Q3 | 2014-11-12 | 13F-HR | View on EDGAR |
| 2014 Q2 | 2014-08-11 | 13F-HR | View on EDGAR |
| 2014 Q1 | 2014-05-13 | 13F-HR | View on EDGAR |
| 2013 Q4 | 2014-03-25 | Amendment | View on EDGAR |
| 2013 Q4 | 2014-02-14 | 13F-HR | View on EDGAR |
| 2013 Q3 | 2013-11-13 | 13F-HR | View on EDGAR |
| 2013 Q2 | 2013-08-13 | 13F-HR | View on EDGAR |
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