Loomis Sayles & Co L P holds a focused book of 711 stocks worth $74.3B as of Q1 2026 (disclosed May 14, 2026, a ~44-day 13F lag). This quarter they opened Piper Sandler Cos and trimmed Boeing Co. Their largest long position is Nvidia Corp at 10% of the equity book. Cloning the disclosed picks since 2013 would be +378% (+13.0%/yr). That is a simulation of the disclosed long book, not audited returns.
The reported book (valued from quarter-end) returned +384.2%, a 6.2-point gap that is the cost of the ~44-day 13F disclosure lag a real follower can't avoid.
Growth of $10,000 cloning Loomis Sayles & Co L P's disclosed long 13F book, rebalanced on each filing date (so it reflects each quarter's actual reporting lag, ~44 days for the latest filing, with no look-ahead), total-return basis (dividends reinvested), derived from end-of-day prices. “Their reported book” values the same picks from quarter-end, before they were public. S&P 500 is SPY total return over the same window. Excludes shorts, cash, options and non-13F holdings. Not investment advice.
Top-heavy: focused book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
99% mapped to company sectors
Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.
Estimated $ traded · quarter-end prices, no cost basis
Other tracked managers holding the same core names as Loomis Sayles & Co L P
| Manager / fund | Shared names | Their $ in those |
|---|---|---|
| WELLS FARGO & COMPANY/MN | 80 / 80 | $89.3B |
| STATE STREET CORP | 79 / 80 | $1.0T |
| FMR LLC | 79 / 80 | $685.0B |
| MORGAN STANLEY | 79 / 80 | $395.2B |
| JPMORGAN CHASE & CO | 79 / 80 | $377.5B |
| BANK OF AMERICA CORP /DE/ | 79 / 80 | $236.9B |
| GOLDMAN SACHS GROUP INC | 79 / 80 | $180.6B |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME | 79 / 80 | $170.6B |
Ranked by how many of Loomis Sayles & Co L P's top 80 disclosed names each fund also holds: a cross-fund conviction signal from the latest 13F of every tracked manager.
Bars show each stock's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Nvidia Corp COMMON | $7.1B | 40.98M | 9.6% | ▲+1.6% Added · +636K sh | |
| 2 | Alphabet Inc-CL A COMMON | $5.0B | 17.34M | 6.7% | ▲+1.1% Added · +197K sh | |
| 3 | Tesla Inc COMMON | $4.7B | 12.66M | 6.3% | ▲~0% Added · +5K sh | |
| 4 | Meta Platforms Inc COMMON | $4.3B | 7.45M | 5.7% | ▲+0.6% Added · +43K sh | |
| 5 | Amazon.com Inc COMMON | $3.8B | 18.33M | 5.1% | ▲+2.0% Added · +363K sh | |
| 6 | Netflix.com Inc COMMON | $3.7B | 37.97M | 4.9% | ▲+2.0% Added · +743K sh | |
| 7 | Boeing Co COMMON | $2.8B | 14.06M | 3.8% | ▼−0.7% Reduced · −98K sh | |
| 8 | Visa Inc-Class A SHRS COMMON | $2.8B | 9.25M | 3.8% | ▲+0.3% Added · +32K sh | |
| 9 | Oracle Corp COMMON | $2.5B | 16.84M | 3.3% | ▲+3.9% Added · +639K sh | |
| 10 | Microsoft Corp COMMON | $2.2B | 6.06M | 3.0% | ▲+1.1% Added · +67K sh | |
| 11 | Monster Beverage Corporation COMMON | $1.9B | 25.91M | 2.5% | ▼−1.4% Reduced · −363K sh | |
| 12 | Vertex Pharmaceuticals Inc COMMON | $1.8B | 4.00M | 2.4% | ▼−0.7% Reduced · −30K sh | |
| 13 | Shopify Inc - Class A COMMON | $1.7B | 14.40M | 2.3% | ▼−0.5% Reduced · −67K sh | |
| 14 | Regeneron Pharmaceuticals COMMON | $1.5B | 1.91M | 2.0% | ▼−1.1% Reduced · −22K sh | |
| 15 | Autodesk Inc COMMON | $1.4B | 5.74M | 1.8% | ▼−1.0% Reduced · −57K sh | |
| 16 | The Walt Disney Co COMMON | $1.3B | 13.99M | 1.8% | ▼−1.3% Reduced · −190K sh | |
| 17 | Salesforce.com Inc COMMON | $1.1B | 6.06M | 1.5% | ▼−0.2% Reduced · −13K sh | |
| 18 | Starbucks Corp COMMON | $840.0M | 9.38M | 1.1% | ▼−1.1% Reduced · −102K sh | |
| 19 | Novartis AG Spon ADR ADR | $828.8M | 5.43M | 1.1% | ▼−1.9% Reduced · −108K sh | |
| 20 | Alphabet Inc-CL C COMMON | $816.9M | 2.85M | 1.1% | ▼−1.3% Reduced · −38K sh | |
| 21 | Expeditors Intl Wash Inc COMMON | $804.2M | 5.61M | 1.1% | ▼−1.4% Reduced · −78K sh | |
| 22 | Intuitive Surgical Inc COMMON | $783.5M | 1.70M | 1.1% | ▼−0.9% Reduced · −16K sh | |
| 23 | Deere & Co COMMON | $774.4M | 1.37M | 1.0% | ▼−0.4% Reduced · −6K sh | |
| 24 | Sei Investments Co COMMON | $677.1M | 8.63M | 0.9% | ▼−1.3% Reduced · −116K sh | |
| 25 | Thermo Fisher Scientific Inc COMMON | $670.3M | 1.36M | 0.9% | ▼−1.1% Reduced · −15K sh | |
| 26 | Novo-Nordisk A/s Spons ADR ADR | $625.4M | 17.02M | 0.8% | ▼−0.7% Reduced · −118K sh | |
| 27 | Yum! Brands Inc COMMON | $581.7M | 3.74M | 0.8% | ▼−1.1% Reduced · −43K sh | |
| 28 | Qualcomm Inc COMMON | $540.8M | 4.20M | 0.7% | ▼−1.5% Reduced · −63K sh | |
| 29 | Booking Holdings Inc COMMON | $517.4M | 122.9K | 0.7% | ▲62× Added · +121K sh | |
| 30 | Block Inc COMMON | $446.8M | 7.42M | 0.6% | ▼−1.3% Reduced · −98K sh | |
| 31 | Nike Inc CL B COMMON | $418.8M | 7.93M | 0.6% | ▼−0.4% Reduced · −36K sh | |
| 32 | Illumina Inc COMMON | $362.8M | 2.94M | 0.5% | ▼−29% Reduced · −1.2M sh | |
| 33 | Factset Research Systems Inc COMMON | $320.7M | 1.48M | 0.4% | ▼−1.1% Reduced · −17K sh | |
| 34 | Mastercard Inc-Class A COMMON | $307.4M | 615.2K | 0.4% | ▲+4.8% Added · +28K sh | |
| 35 | Natixis Loomis Focused GRWTH Exchange Traded Funds | $294.9M | 7.49M | 0.4% | ▲+1.5% Added · +114K sh | |
| 36 | S&P Global COMMON | $286.9M | 674.5K | 0.4% | ▲+6.0% Added · +38K sh | |
| 37 | PayPal Holdings Inc COMMON | $286.2M | 6.33M | 0.4% | ▼−1.5% Reduced · −95K sh | |
| 38 | Workday Inc COMMON | $270.1M | 2.08M | 0.4% | ▼−0.8% Reduced · −17K sh | |
| 39 | Taiwan Semiconductor ADR ADR | $221.1M | 654.1K | 0.3% | ▼−17% Reduced · −133K sh | |
| 40 | Hilton Worldwide Holdings In COMMON | $220.7M | 725.7K | 0.3% | ▼−20% Reduced · −179K sh | |
| 41 | Parker Hannifin COMMON | $218.6M | 244.2K | 0.3% | ▼−37% Reduced · −146K sh | |
| 42 | Trane Technologies PLC COMMON | $211.5M | 507.5K | 0.3% | ▲+6.0% Added · +29K sh | |
| 43 | Yum China Holdings Inc COMMON | $209.5M | 4.29M | 0.3% | ▼−0.5% Reduced · −23K sh | |
| 44 | BlackRock Inc COMMON | $201.5M | 209.6K | 0.3% | ▼−24% Reduced · −65K sh | |
| 45 | O'reilly Automotive Inc Common Stock New COMMON | $194.6M | 2.11M | 0.3% | ▼−13% Reduced · −313K sh | |
| 46 | Costco Wholesale Corp COMMON | $192.0M | 192.6K | 0.3% | ▼−8.8% Reduced · −19K sh | |
| 47 | JP Morgan Chase & Co COMMON | $188.4M | 640.5K | 0.3% | ▼−9.6% Reduced · −68K sh | |
| 48 | Kla-Tencor Corporation COMMON | $183.7M | 124.8K | 0.2% | ▼−9.7% Reduced · −13K sh | |
| 49 | Echostar Corp CVT CV BND | $183.1M | 1.56M | 0.2% | ▼−19% Reduced · −357K sh | |
| 50 | Cummins Engine COMMON | $180.5M | 335.6K | 0.2% | ▼−33% Reduced · −168K sh |
The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This fund page is the Follow view. The Build view lets your agent pull holdings, quarter changes, overlap, and source filings through API or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/funds/312348/holdings"
Use Arkolith to show LOOMIS SAYLES & CO L P's latest holdings, largest changes, and filing provenance.
As-of date vs the date the SEC received each filing
| Quarter | As of | Filed | Positions | Value | Form |
|---|---|---|---|---|---|
| Q1 2026 | Mar 31, 2026 | May 14, 2026 | 1,168 | $74.3B | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Feb 12, 2026 | 1,124 | $83.0B | 13F-HR |
| Q3 2025 | Sep 30, 2025 | Nov 13, 2025 | 1,132 | $84.1B | 13F-HR |
| Q2 2025 | Jun 30, 2025 | Aug 13, 2025 | 1,145 | $79.8B | 13F-HR |
| Q1 2025 | Mar 31, 2025 | May 14, 2025 | 1,086 | $69.2B | 13F-HR |
| Q4 2024 | Dec 31, 2024 | Feb 12, 2025 | 1,079 | $79.2B | 13F-HR |
| Q3 2024 | Sep 30, 2024 | Nov 13, 2024 | 1,044 | $76.2B | 13F-HR |
| Q2 2024 | Jun 30, 2024 | Aug 13, 2024 | 1,079 | $72.6B | 13F-HR |
| Q1 2024 | Mar 31, 2024 | May 14, 2024 | 1,058 | $70.3B | 13F-HR |
| Q4 2023 | Dec 31, 2023 | Feb 13, 2024 | 1,326 | $65.3B | 13F-HR |
| Q3 2023 | Sep 30, 2023 | Nov 9, 2023 | 1,277 | $58.2B | 13F-HR |
| Q2 2023 | Jun 30, 2023 | Aug 11, 2023 | 1,343 | $62.0B | 13F-HR |
| Q1 2023 | Mar 31, 2023 | May 15, 2023 | 1,340 | $57.6B | 13F-HR/A |
| Q4 2022 | Dec 31, 2022 | Feb 10, 2023 | 1,195 | $49.9B | 13F-HR |
| Q3 2022 | Sep 30, 2022 | Nov 14, 2022 | 1,297 | $49.4B | 13F-HR |
| Q2 2022 | Jun 30, 2022 | Aug 5, 2022 | 1,328 | $53.9B | 13F-HR |
| Q1 2022 | Mar 31, 2022 | May 13, 2022 | 1,409 | $74.8B | 13F-HR |
| Q4 2021 | Dec 31, 2021 | Feb 14, 2022 | 1,168 | $82.7B | 13F-HR |
| Q3 2021 | Sep 30, 2021 | Nov 12, 2021 | 1,290 | $81.3B | 13F-HR |
| Q2 2021 | Jun 30, 2021 | Aug 13, 2021 | 1,223 | $82.5B | 13F-HR |
| Q1 2021 | Mar 31, 2021 | May 17, 2021 | 1,216 | $77.2B | 13F-HR |
| Q4 2020 | Dec 31, 2020 | Feb 12, 2021 | 1,174 | $75.7B | 13F-HR |
| Q3 2020 | Sep 30, 2020 | Nov 12, 2020 | 1,004 | $68.7B | 13F-HR |
Holdings from SEC EDGAR 13F-HR filings, updated quarterly, filed up to 45 days after quarter-end. Public domain. The book and weighting are long equity only; disclosed put/call options are listed separately and excluded from those totals. The performance line is a simulation of the disclosed long book, not an audited return.