Deltec Asset Management LLC is an SEC-registered investment adviser based in New York, NY that reports managing 4 hedge funds on Form ADV. It reports $782.8 million in regulatory assets under management. Its private funds, of all types, hold $257.5 million in gross assets. Its disclosed U.S. stock holdings returned an estimated +6.7% 2026 YTD through Jun 30 (S&P 500: +9.5%), based on 13F filings. Over a longer period they returned an estimated +43.4% from Q3 2024 to Q2 2026, compared with +37.2% for the S&P 500, based on 13F filings.
- Regulatory assets under management
- $782.8 millionForm ADV Item 5.F
- Gross assets of private funds
- $257.5 millionAll private fund types, Form ADV
- Hedge funds managed
- 44 private funds in total
- Employees
- 15Form ADV Item 5.A
- Registration
- SEC-registered adviserCRD 104068
- Latest Form ADV
- 03/18/2026Disciplinary disclosures: none reported
Estimated 13F portfolio performance
Estimated by AltMountain, derived from the firm’s public Form 13F filings. Not reported by the firm and not the return of any fund.
| Quarter | Est. 13F return | S&P 500 |
|---|---|---|
| Q2 2026 | +14.3% | +14.8% |
| Q1 2026 | -6.7% | -4.6% |
| Q4 2025 | +2.8% | +2.4% |
| Q3 2025 | +8.1% | +7.8% |
| Q2 2025 | +19.3% | +10.4% |
| Q1 2025 | -8.0% | -4.5% |
| Q4 2024 | +6.3% | +2.1% |
| Q3 2024 | +3.6% | +5.4% |
Estimate of the firm's disclosed long U.S. stock portfolio from its quarterly 13F filings, holding each quarter-end portfolio to the next quarter-end at prices implied by all 13F filers. It is a price return before dividends and fees, ignores shorts, options, bonds, cash and trading within the quarter, and is not the return of any fund. Disclosures
Manager of this firm? Report your fund’s actual net return, or email hello@altmountain.com to correct or remove this estimate. Removal requests from the firm are honored.
13F holdings as of Sep 30, 2026
The 50 largest of 255 share positions ($641,680,378) reported by Deltec Asset Management LLC on Form 13F for the quarter ended Sep 30, 2026, filed Oct 26, 2026. Shown as filed with the SEC. Original filing on SEC.gov ↗ The estimated return above runs through Jun 30, 2026; it is updated when the SEC publishes its complete data for the quarter.
| Stock | Value | % of 13F portfolio | Shares | Shares vs prior quarter |
|---|---|---|---|---|
| Alphabet Inc | $56,256,736 | 8.77% | 163,499 | -2.28% |
| Nvidia Corporation | $35,257,990 | 5.49% | 154,383 | -8.34% |
| Amazon Com Inc | $35,207,885 | 5.49% | 141,312 | -7.17% |
| Broadcom Inc | $29,543,508 | 4.60% | 84,124 | +0.56% |
| Microsoft Corp | $29,350,190 | 4.57% | 57,224 | -0.15% |
| Ishares TR | $20,221,477 | 3.15% | 200,849 | New |
| Ocular Therapeutix Inc | $20,122,989 | 3.14% | 2,623,597 | +5.95% |
| Taiwan Semiconductor Manufac | $17,740,317 | 2.76% | 38,888 | +1.97% |
| Doordash Inc | $16,953,045 | 2.64% | 92,362 | -43.87% |
| Visa Inc | $15,947,784 | 2.49% | 44,382 | -2.25% |
| Flex LTD | $15,319,847 | 2.39% | 139,284 | +40.29% |
| Carnival Corp LTD | $15,026,750 | 2.34% | 612,337 | +0.95% |
| Meta Platforms Inc | $11,703,680 | 1.82% | 16,139 | -23.52% |
| Uber Technologies Inc | $11,325,251 | 1.76% | 165,308 | +4.53% |
| Alaska Air Group Inc | $10,811,232 | 1.68% | 279,360 | -5.50% |
| Eli Lilly & Co | $9,893,034 | 1.54% | 8,550 | -2.84% |
| Space Exploration Techn Corp | $9,426,789 | 1.47% | 62,487 | New |
| Apple Inc | $8,737,446 | 1.36% | 26,237 | -0.38% |
| Jabil Inc | $8,701,611 | 1.36% | 30,334 | +206.40% |
| Philip Morris Intl Inc | $8,002,609 | 1.25% | 41,938 | -0.36% |
| Walmart Inc | $7,601,956 | 1.18% | 73,152 | -2.01% |
| Eqt Corp | $7,387,870 | 1.15% | 152,139 | Unchanged |
| TTM Technologies Inc | $7,071,899 | 1.10% | 57,570 | New |
| Home Depot Inc | $6,504,579 | 1.01% | 22,864 | -3.80% |
| Mastercard Incorporated | $6,453,853 | 1.01% | 11,703 | -5.35% |
| Marvell Technology Inc | $6,080,793 | 0.95% | 23,015 | Unchanged |
| Embraer S.A. | $5,856,130 | 0.91% | 77,750 | -2.51% |
| Alphabet Inc | $5,448,773 | 0.85% | 15,991 | -0.46% |
| Shell PLC | $5,367,569 | 0.84% | 56,471 | Unchanged |
| Vista Energy S.a.b. De C.V. | $4,896,022 | 0.76% | 74,920 | -5.37% |
| Celestica Inc | $4,452,095 | 0.69% | 12,318 | -5.03% |
| State STR SPDR S&P 500 ETF T | $4,358,430 | 0.68% | 5,715 | -7.90% |
| SPDR Series Trust | $4,123,800 | 0.64% | 45,000 | New |
| Copa Holdings SA | $3,947,193 | 0.62% | 29,937 | +9.56% |
| Berkshire Hathaway Inc Del | $3,890,483 | 0.61% | 7,813 | Unchanged |
| Select Sector SPDR TR | $3,745,661 | 0.58% | 22,240 | -3.30% |
| Parker-hannifin Corp | $3,465,308 | 0.54% | 3,627 | Unchanged |
| TJX Cos Inc New | $3,453,291 | 0.54% | 26,100 | Unchanged |
| Mercadolibre Inc | $3,396,561 | 0.53% | 1,965 | Unchanged |
| Jpmorgan Chase & Co | $2,952,658 | 0.46% | 8,925 | Unchanged |
| Costco Wholesale Corporation | $2,944,950 | 0.46% | 3,235 | -7.17% |
| Cisco SYS Inc | $2,932,487 | 0.46% | 27,246 | -1.80% |
| Globalfoundries Inc | $2,899,160 | 0.45% | 60,500 | New |
| Capital One Finl Corp | $2,896,050 | 0.45% | 15,000 | -76.76% |
| Mannkind Corp | $2,839,200 | 0.44% | 728,000 | +15.92% |
| Altria Group Inc | $2,803,499 | 0.44% | 41,632 | Unchanged |
| Antero Resources Corp | $2,671,200 | 0.42% | 80,000 | -11.11% |
| Ge Vernova Inc | $2,423,749 | 0.38% | 2,550 | Unchanged |
| BBB Foods Inc | $2,342,480 | 0.37% | 44,500 | -18.35% |
| Citigroup Inc | $2,278,848 | 0.36% | 17,600 | Unchanged |
Changes since Jun 30, 2026
Comparing the share counts in the two quarter-end filings: 41 new positions, 50 sold out, 24 increased, 54 reduced and 136 unchanged.
New positions
| Stock | Value | Shares |
|---|---|---|
| Ishares TR | $20,221,477 | 200,849 |
| Space Exploration Techn Corp | $9,426,789 | 62,487 |
| TTM Technologies Inc | $7,071,899 | 57,570 |
| SPDR Series Trust | $4,123,800 | 45,000 |
| Globalfoundries Inc | $2,899,160 | 60,500 |
| Ciena Corp | $2,110,920 | 6,000 |
| United Airls Hldgs Inc | $1,109,500 | 10,000 |
| Ares Acquisition Corp III | $1,007,000 | 100,000 |
| Jones Ventures Intl Acquisit | $982,000 | 100,000 |
| Osprey Acquisition Corp III | $981,018 | 99,900 |
| Gores Holdings Xi Inc | $749,250 | 75,000 |
| CH4 Natural Solutions Corp | $742,500 | 75,000 |
| Futurecorp Space Acquisition | $739,500 | 75,000 |
| Amr Res Acquisition Corp | $734,250 | 75,000 |
| Burlington Stores Inc | $534,380 | 2,000 |
| Ishares Bitcoin Trust ETF | $520,740 | 11,000 |
| Live Oak Acquisition Corp Vi | $500,505 | 50,000 |
| Pinnacle Acquisition Corp | $500,500 | 50,000 |
| Iron Dome Acquisition I Corp | $499,000 | 50,000 |
| Thunder Brdg Cap Partners V | $496,000 | 50,000 |
Sold out
| Stock | Value at Jun 30, 2026 | Shares held then |
|---|---|---|
| Global X FDS | $8,088,870 | 185,100 |
| Tesla Inc | $7,015,187 | 16,679 |
| Arista Networks Inc | $6,778,212 | 39,900 |
| Lumentum Hldgs Inc | $3,003,210 | 3,500 |
| Kratos Defense & Sec Solutio | $1,445,940 | 29,000 |
| Axia Energia SA | $1,325,280 | 125,500 |
| Graf Global Corp | $1,086,264 | 100,000 |
| Launch One Acquisition Corp | $1,084,000 | 100,000 |
| Jena Acquisition Corp II | $1,036,000 | 100,000 |
| Ares Acquisition Corp III | $1,005,000 | 100,000 |
| CH4 Natural Solutions Corp | $1,002,000 | 100,000 |
| Krakacquisition Corporation | $1,000,000 | 100,000 |
| RMG ML Sports Holdings | $999,000 | 100,000 |
| Asml Hldg NV | $994,720 | 500 |
| Esperion Therapeutics Inc Ne | $796,478 | 252,050 |
| Churchill Capital Corp Ix | $762,300 | 70,000 |
| Gores Holdings Xi Inc | $761,250 | 75,000 |
| Futurecorp Space Acquisition | $759,750 | 75,000 |
| Long Table Growth Corp | $750,750 | 75,000 |
| Newhold Invts Corp IV | $750,000 | 75,000 |
Largest increases
| Stock | Change in shares | Change | Value now | Shares now |
|---|---|---|---|---|
| Jabil Inc | +20,434 | +206.40% | $8,701,611 | 30,334 |
| Flex LTD | +40,003 | +40.29% | $15,319,847 | 139,284 |
| Ocular Therapeutix Inc | +147,400 | +5.95% | $20,122,989 | 2,623,597 |
| Roundhill ETF Trust | +14,400 | +96.00% | $1,774,584 | 29,400 |
| Nu Hldgs LTD | +50,000 | +111.11% | $1,202,700 | 95,000 |
| Uber Technologies Inc | +7,160 | +4.53% | $11,325,251 | 165,308 |
| Mannkind Corp | +100,000 | +15.92% | $2,839,200 | 728,000 |
| Copa Holdings SA | +2,612 | +9.56% | $3,947,193 | 29,937 |
| Taiwan Semiconductor Manufac | +750 | +1.97% | $17,740,317 | 38,888 |
| Banco Macro S A | +4,900 | +50.67% | $975,170 | 14,570 |
| Oracle Corp | +2,000 | +14.81% | $2,128,150 | 15,500 |
| Broadcom Inc | +469 | +0.56% | $29,543,508 | 84,124 |
| DBX ETF TR | +5,000 | +66.67% | $408,375 | 12,500 |
| Hdfc Bank LTD | +6,500 | +12.22% | $1,333,698 | 59,700 |
| Carnival Corp LTD | +5,753 | +0.95% | $15,026,750 | 612,337 |
| Banco Bbva Argentina S A | +8,500 | +14.53% | $860,950 | 67,000 |
| Pampa Energia SA | +1,312 | +6.34% | $1,710,940 | 22,000 |
| Icici Bank Limited | +3,000 | +8.45% | $1,060,675 | 38,500 |
| Applied Matls Inc | +150 | +6.52% | $1,252,881 | 2,450 |
| Alibaba Group Hldg LTD | +500 | +9.39% | $626,420 | 5,825 |
Largest reductions
| Stock | Change in shares | Change | Value now | Shares now |
|---|---|---|---|---|
| Doordash Inc | -72,193 | -43.87% | $16,953,045 | 92,362 |
| Capital One Finl Corp | -49,555 | -76.76% | $2,896,050 | 15,000 |
| Meta Platforms Inc | -4,962 | -23.52% | $11,703,680 | 16,139 |
| Boston Scientific Corp | -79,400 | -92.43% | $283,725 | 6,500 |
| Nvidia Corporation | -14,049 | -8.34% | $35,257,990 | 154,383 |
| Amazon Com Inc | -10,909 | -7.17% | $35,207,885 | 141,312 |
| Alphabet Inc | -3,811 | -2.28% | $56,256,736 | 163,499 |
| Lionheart Holdings | -100,000 | -70.67% | $452,350 | 41,500 |
| TRG Latin Amer Acquis Corp | -96,378 | -49.08% | $997,000 | 100,000 |
| SPDR Series Trust | -5,000 | -35.71% | $1,419,120 | 9,000 |
| Alaska Air Group Inc | -16,250 | -5.50% | $10,811,232 | 279,360 |
| Launch Two Acquisition Corp. | -50,000 | -33.33% | $1,084,000 | 100,000 |
| BBB Foods Inc | -10,000 | -18.35% | $2,342,480 | 44,500 |
| Sizzle Acquisition Corp. II | -50,000 | -33.33% | $1,048,000 | 100,000 |
| Soulpower Acquisition Corp | -50,000 | -33.33% | $1,047,000 | 100,000 |
| Suma Acquisition Corp | -50,000 | -33.33% | $995,000 | 100,000 |
| State STR SPDR S&P 500 ETF T | -490 | -7.90% | $4,358,430 | 5,715 |
| Visa Inc | -1,021 | -2.25% | $15,947,784 | 44,382 |
| Mastercard Incorporated | -661 | -5.35% | $6,453,853 | 11,703 |
| Antero Resources Corp | -10,000 | -11.11% | $2,671,200 | 80,000 |
Each list shows up to 20 positions, largest first by dollar amount. Changes compare two quarter-end snapshots, with the earlier share count adjusted for stock splits AltMountain detected. They do not show when, or at what price, anything was bought or sold.
From public Form 13F filings, not verified. Form 13F is filed up to 45 days after the quarter ends, so positions may have changed. It lists only certain long positions in U.S.-listed stocks and exchange-traded funds; options are not shown here, and short positions, most bonds, cash, non-U.S. securities and private investments are not reported at all, so a holding may be one side of a hedge. A filing covers the manager as a whole, not any single fund, and filings contain errors. This is not investment advice or a recommendation to buy or sell any security. Disclosures
Hedge funds filing Form D (4)
Matched to this firm by the fund names and related persons in each Form D. The list may be incomplete.
Private funds reported on Form ADV (5)
As reported in the adviser's Form ADV filed Mar 28, 2024. Funds also listed from Form D are shown above.
From SEC filings. Firm data comes from the SEC's Form ADV data as of Oct 2, 2026; performance estimates come from Form 13F. AltMountain has not verified this information, and it is not an offer, solicitation or recommendation. Full disclosures