Wellesley Asset Management — 13F Holdings & Portfolio
CIK 1533551 · latest 13F-HR filed 2026-08-13
Wellesley Asset Management manages $1.10B in 13F-reported U.S. long-equity assets across 64 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are BOX (4.29%), ITRO (3.90%), BL (3.63%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 17 new positions, exited 7, added to 24, and trimmed 12.
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.
SUITE 203
PORTSMOUTH, NH 03801
$1.10B
Long-equity book
64
Distinct positions
2026-06-30
Filed 2026-08-13
+17 / −7 / ↑24 / ↓12
vs 2026-03-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- AVAV US$29.8M +381.6%
- NTNX US$13.5M +540.5%
- TTEK US$11.5M +376.2%
- LIVN US$8.5M +27.8%
- ITRI US$8.3M +24.3%
Top Trims
- AKAM US-$17.9M -90.6%
- ON US-$16.3M -51.0%
- AMPH US-$15.9M -67.5%
- SYNA US-$13.1M -36.2%
- AKAM US-$10.8M -31.9%
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 | $47.0M | 4.29% | 49,546,000 | PRN |
| 2 | ITRI US | ITRO | 465741AQ9 | $42.7M | 3.90% | 44,985,000 | PRN |
| 3 | BL US | BL | 09239BAF6 | $39.8M | 3.63% | 42,867,000 | PRN |
| 4 | LIVN US | LIVN | 53802LAB8 | $39.0M | 3.56% | 31,146,000 | PRN |
| 5 | AVAV US | AVAV | 008073AA6 | $37.6M | 3.43% | 39,025,000 | PRN |
| 6 | HAE US | HAE | 405024AD2 | $36.6M | 3.34% | 37,883,000 | PRN |
| 7 | MTH US | MTH | 59001ABF8 | $33.2M | 3.03% | 32,281,000 | PRN |
| 8 | PCG US | PCG | 69331CAL2 | $32.8M | 3.00% | 32,230,000 | PRN |
| 9 | GBX US | GBX | 393657AM3 | $30.6M | 2.80% | 26,998,000 | PRN |
| 10 | SO US | SO | 842587ED5 | $30.2M | 2.76% | 30,127,000 | PRN |
| 11 | DASH US | DASH | 25809KAB1 | $30.0M | 2.74% | 31,902,000 | PRN |
| 12 | PSN US | PSN | 70202LAD4 | $29.9M | 2.73% | 30,098,000 | PRN |
| 13 | MCHP US | MCHP | 595017BG8 | $29.5M | 2.70% | 27,068,000 | PRN |
| 14 | GWRE US | GWRE | 40171VAC4 | $29.0M | 2.65% | 31,894,000 | PRN |
| 15 | GPN US | GPN | 37940XAU6 | $26.8M | 2.45% | 29,583,000 | PRN |
| 16 | DBX US | DBX | 26210CAD6 | $26.8M | 2.45% | 28,266,000 | PRN |
| 17 | TVTX US | TVTX | 89422GAB3 | $26.3M | 2.40% | 23,551,000 | PRN |
| 18 | MMSI US | MMSI | 589889AB0 | $26.1M | 2.38% | 25,627,000 | PRN |
| 19 | NVST US | NVST | 29415FAD6 | $25.3M | 2.31% | 25,263,000 | PRN |
| 20 | RGEN US | RGEN | 759916AD1 | $24.5M | 2.24% | 25,587,000 | PRN |
| 21 | WGO US | WGO | 974637AF7 | $23.4M | 2.14% | 24,881,000 | PRN |
| 22 | SYNA US | SYNA | 87157DAJ8 | $23.1M | 2.11% | 15,386,000 | PRN |
| 23 | AKAM US | AKAM | 00971TAL5 | $23.1M | 2.11% | 19,682,000 | PRN |
| 24 | DDOG US | DDOG | 23804LAD5 | $23.0M | 2.10% | 16,021,000 | PRN |
| 25 | EEFT US | EEFT | 298736AM1 | $22.7M | 2.07% | 27,000,000 | PRN |
| 26 | LMAT US | LMAT | 525558AB8 | $21.1M | 1.92% | 20,558,000 | PRN |
| 27 | PRGS US | PRGS | 743312AD2 | $20.9M | 1.91% | 21,041,000 | PRN |
| 28 | CMS US | CMS | 125896BX7 | $20.7M | 1.89% | 20,500,000 | PRN |
| 29 | OMCL US | OMCL | 68213NAF6 | $20.6M | 1.88% | 20,766,000 | PRN |
| 30 | ITGR US | USFD | 45826HAD1 | $20.5M | 1.87% | 21,186,000 | PRN |
| 31 | LNTH US | LNTH | 516544AB9 | $17.1M | 1.56% | 11,876,000 | PRN |
| 32 | JD US | JD | 47215PAJ5 | $17.0M | 1.56% | 17,185,000 | PRN |
| 33 | NTNX US | NTNX | 67059NAK4 | $16.0M | 1.46% | 16,171,000 | PRN |
| 34 | ON US | ON | 682189AU9 | $15.7M | 1.43% | 12,961,000 | PRN |
| 35 | TTEK US | TTEK | 88162GAB9 | $14.6M | 1.33% | 15,782,000 | PRN |
| 36 | LYFT US | LYFT | 55087PAD6 | $10.4M | 0.95% | 9,900,000 | PRN |
| 37 | JAZZ US | JAZZ | 472145AH4 | $10.1M | 0.93% | 7,500,000 | PRN |
| 38 | WKC US | WKC | 98149GAB6 | $10.0M | 0.91% | 9,170,000 | PRN |
| 39 | LYV US | LYV | 538034BC2 | $9.8M | 0.90% | 8,690,000 | PRN |
| 40 | PPL US | PPL | 69352PAS2 | $9.5M | 0.87% | 8,480,000 | PRN |
| 41 | BMRN US | BMRN | 09061GAK7 | $9.4M | 0.86% | 9,624,000 | PRN |
| 42 | CAKE US | CAKE | 163072AC5 | $8.9M | 0.81% | 9,000,000 | PRN |
| 43 | FLR US | FLR | 343412AJ1 | $8.0M | 0.73% | 7,645,000 | PRN |
| 44 | LCII US | LCII | 501812AD3 | $8.0M | 0.73% | 7,200,000 | PRN |
| 45 | AMPH US | AMPH | 03209RAB9 | $7.7M | 0.70% | 8,460,000 | PRN |
| 46 | PCRX US | PCRX | 695127AJ9 | $7.5M | 0.69% | 7,522,000 | PRN |
| 47 | ETSY US | ETSY | 29786AAQ9 | $7.1M | 0.65% | 7,735,000 | PRN |
| 48 | COGT US | COGT | 19240QAA0 | $6.5M | 0.59% | 7,250,000 | PRN |
| 49 | LNT US | LNT | 018802AE8 | $5.5M | 0.50% | 6,500,000 | PRN |
| 50 | ALRM US | ALRM | 011642AD7 | $5.4M | 0.49% | 5,626,000 | PRN |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-06-30 | 2026-08-13 | $1.10B | 64 | 0001533551-26-000004 |
| 2026-03-31 | 2026-05-11 | $952.5M | 54 | 0001533551-26-000003 |
| 2025-12-31 | 2026-02-06 | $960.8M | 54 | 0001533551-26-000002 |
| 2025-12-31 | 2026-02-06 | $672.2M | 54 | 0001533551-26-000001 |