Wellesley Asset Management — 13F Holdings & Portfolio
CIK 1533551 · latest 13F-HR filed 2026-02-06
Wellesley Asset Management manages $960.8M in 13F-reported U.S. long-equity assets across 54 reported positions as of its 2025-12-31 13F-HR filing. Its largest disclosed positions are BOX (4.51%), HAE US (4.41%), SYNA (4.34%). Quarter over quarter (versus its 2025-12-31 filing) the fund opened 0 new positions, exited 0, added to 40, and trimmed 0.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
$960.8M
Long-equity book
54
Distinct positions
2025-12-31
Filed 2026-02-06
+0 / −0 / ↑40 / ↓0
vs 2025-12-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- BL US$15.5M +75.1%
- SYNA US$14.6M +53.7%
- BOX US$14.5M +50.2%
- ITRI US$13.7M +59.0%
- AKAM US$13.3M +82.5%
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | BOX US | BOX | 10316TAD6 | $43.4M | 4.51% | 44,891,000 | PRN |
| 2 | HAE US | — | 405024AD2 | $42.4M | 4.41% | 40,842,000 | PRN |
| 3 | SYNA US | SYNA | 87157DAJ8 | $41.7M | 4.34% | 39,166,000 | PRN |
| 4 | LIVN US | LIVN | 53802LAB8 | $39.3M | 4.09% | 34,131,000 | PRN |
| 5 | F US | — | 345370CZ1 | $38.7M | 4.03% | 37,047,000 | PRN |
| 6 | PCG US | PCG | 69331CAL2 | $38.2M | 3.98% | 36,998,000 | PRN |
| 7 | ITRI US | ITRO | 465741AQ9 | $36.9M | 3.84% | 36,131,000 | PRN |
| 8 | GBX US | GBX | 393657AM3 | $36.3M | 3.78% | 33,446,000 | PRN |
| 9 | BL US | BL | 09239BAF6 | $36.2M | 3.76% | 34,564,000 | PRN |
| 10 | VSH US | VSH | 928298AR9 | $35.5M | 3.70% | 38,981,000 | PRN |
| 11 | MTH US | MTH | 59001ABF8 | $33.7M | 3.51% | 34,144,000 | PRN |
| 12 | ON US | ON | 682189AU9 | $31.6M | 3.29% | 32,959,000 | PRN |
| 13 | FOUR US | FOUR | 82452JAD1 | $30.1M | 3.14% | 31,430,000 | PRN |
| 14 | AKAM US | AKAM | 00971TAL5 | $29.4M | 3.06% | 29,398,000 | PRN |
| 15 | RGEN US | RGEN | 759916AD1 | $26.5M | 2.76% | 24,122,000 | PRN |
| 16 | AMPH US | AMPH | 03209RAB9 | $26.3M | 2.74% | 28,473,000 | PRN |
| 17 | WGO US | WGO | 974637AF7 | $25.9M | 2.70% | 27,463,000 | PRN |
| 18 | LYFT US | LYFT | 55087PAD6 | $25.8M | 2.68% | 21,186,000 | PRN |
| 19 | PSN US | — | 70202LAD4 | $24.6M | 2.56% | 23,772,000 | PRN |
| 20 | GPN US | GPN | 37940XAU6 | $24.1M | 2.51% | 26,844,000 | PRN |
| 21 | SPOT US | — | 84921RAB6 | $21.4M | 2.23% | 19,002,000 | PRN |
| 22 | JBTM US | JBTM | 477839AB0 | $20.2M | 2.10% | 19,653,000 | PRN |
| 23 | OMCL US | OMCL | 68213NAF6 | $18.2M | 1.90% | 16,894,000 | PRN |
| 24 | AKAM US | AKAM | 00971TAN1 | $17.9M | 1.86% | 18,151,000 | PRN |
| 25 | LNTH US | LNTH | 516544AB9 | $16.9M | 1.76% | 14,769,000 | PRN |
| 26 | ALRM US | ALRM | 011642AD7 | $16.7M | 1.73% | 17,463,000 | PRN |
| 27 | PRGS US | PRGS | 743312AD2 | $16.4M | 1.71% | 16,368,000 | PRN |
| 28 | DDOG US | DDOG | 23804LAD5 | $15.2M | 1.59% | 15,353,000 | PRN |
| 29 | PPL US | PPL | 69352PAS2 | $14.5M | 1.51% | 13,181,000 | PRN |
| 30 | LNT US | — | 018802AC2 | $13.0M | 1.36% | 12,455,000 | PRN |
| 31 | ENOV US | ENOV | 194014AB2 | $12.9M | 1.35% | 13,197,000 | PRN |
| 32 | FE US | FE | 337932AR8 | $10.9M | 1.13% | 10,576,000 | PRN |
| 33 | SPB US | SPB | 84762LAZ8 | $8.6M | 0.89% | 9,028,000 | PRN |
| 34 | ORA US | ORA | 686688AB8 | $8.3M | 0.87% | 6,070,000 | PRN |
| 35 | WKC US | WKC | 98149GAB6 | $6.1M | 0.63% | 5,693,000 | PRN |
| 36 | COLL US | COLL | 19459JAC8 | $5.6M | 0.58% | 4,000,000 | PRN |
| 37 | TTEK US | TTEK | 88162GAB9 | $5.3M | 0.55% | 4,890,000 | PRN |
| 38 | FLR US | FLR | 343412AJ1 | $5.3M | 0.55% | 4,502,000 | PRN |
| 39 | PCRX US | PCRX | 695127AJ9 | $5.0M | 0.52% | 5,013,000 | PRN |
| 40 | COGT US | COGT | 19240QAA0 | $4.7M | 0.48% | 4,000,000 | PRN |
| 41 | CSWC US | CSWC | 140501AE7 | $4.4M | 0.46% | 4,462,000 | PRN |
| 42 | POST US | POST | 737446AT1 | $4.3M | 0.45% | 4,000,000 | PRN |
| 43 | GWRE US | GWRE | 40171VAC4 | $4.3M | 0.45% | 4,000,000 | PRN |
| 44 | CNP US | CNP | 15189TBD8 | $4.1M | 0.43% | 3,735,000 | PRN |
| 45 | DBX US | DBX | 26210CAD6 | $4.0M | 0.42% | 4,005,000 | PRN |
| 46 | BMRN US | BMRN | 09061GAK7 | $3.9M | 0.41% | 4,058,000 | PRN |
| 47 | IMCR US | IMCR | 45258DAB1 | $3.7M | 0.39% | 4,150,000 | PRN |
| 48 | MKSI US | MKSI | 55306NAB0 | $3.6M | 0.38% | 2,750,000 | PRN |
| 49 | TYL US | — | 902252AB1 | $3.5M | 0.36% | 3,500,000 | PRN |
| 50 | WEC US | WEC | 92939UAP1 | $3.4M | 0.36% | 3,000,000 | PRN |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2025-12-31 | 2026-02-06 | $960.8M | 54 | 0001533551-26-000002 |
| 2025-12-31 | 2026-02-06 | $672.2M | 54 | 0001533551-26-000001 |