Ostrum Asset Management holds a diversified book of 562 stocks worth $1.8B as of Q1 2026 (disclosed May 14, 2026, a ~45-day 13F lag). This quarter they opened Shopify Inc - Class A and trimmed Alphabet Inc-CL A. Their largest long position is Nvidia Corp at 6% of the equity book. Cloning the disclosed picks since 2019 would be +87% (+8.8%/yr). That is a simulation of the disclosed long book, not audited returns.
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curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/funds/1767945/holdings"
Use Arkolith to show OSTRUM ASSET MANAGEMENT's latest holdings, largest changes, and filing provenance.
The reported book (valued from quarter-end) returned +104.2%, a 17.1-point gap that is the cost of the ~45-day 13F disclosure lag a real follower can't avoid.
Growth of $10,000 cloning Ostrum Asset Management's disclosed long 13F book, rebalanced on each filing date (so it reflects the ~45-day reporting lag, 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: diversified 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
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 Corporation Common Stock | $112.7M | 646.4K | 6.3% | ▲+12% Added · +71K sh | |
| 2 | Alphabet Inc Common Stock | $73.7M | 256.4K | 4.1% | ▼−17% Reduced · −51K sh | |
| 3 | Apple Inc Common Stock | $73.2M | 288.5K | 4.1% | ▲+11% Added · +29K sh | |
| 4 | Applied Matls Inc Common Stock | $72.6M | 212.5K | 4.1% | ▲+12% Added · +23K sh | |
| 5 | Eli Lilly & Co Common Stock | $68.1M | 74.1K | 3.8% | ▲+8.9% Added · +6K sh | |
| 6 | Amazon Com Inc Common Stock | $55.2M | 264.9K | 3.1% | ▼−33% Reduced · −129K sh | |
| 7 | Cummins Inc Common Stock | $37.7M | 70.1K | 2.1% | ▲20× Added · +67K sh | |
| 8 | JPMorgan Chase & Co Common Stock | $37.2M | 126.4K | 2.1% | ▼−17% Reduced · −27K sh | |
| 9 | Ge Aerospace Common Stock | $37.0M | 130.3K | 2.1% | ▲+26% Added · +27K sh | |
| 10 | Visa Inc Common Stock | $36.4M | 120.5K | 2.0% | ▲+195% Added · +80K sh | |
| 11 | Eaton Corp PLC Common Stock | $35.3M | 98.7K | 2.0% | ▲+5.2% Added · +5K sh | |
| 12 | Schwab Charles Corp Common Stock | $33.5M | 356.5K | 1.9% | ▲12× Added · +327K sh | |
| 13 | Shopify Inc Common Stock | $30.3M | 255.7K | 1.7% | ▲New New position | |
| 14 | Honeywell Intl Inc Common Stock | $29.4M | 130.3K | 1.7% | ▲30× Added · +126K sh | |
| 15 | Ross Stores Inc Common Stock | $29.3M | 135.1K | 1.6% | ▲24× Added · +129K sh | |
| 16 | Microsoft Corp Common Stock | $28.6M | 77.2K | 1.6% | ▼−62% Reduced · −123K sh | |
| 17 | Nucor Corp Common Stock | $28.5M | 168.4K | 1.6% | ▲+28% Added · +37K sh | |
| 18 | Illumina Inc Common Stock | $28.4M | 230.3K | 1.6% | ▲164× Added · +229K sh | |
| 19 | Vulcan Matls Co Common Stock | $27.8M | 102.2K | 1.6% | ▲+0.6% Added · +583 sh | |
| 20 | Meta Platforms Inc Common Stock | $27.3M | 47.8K | 1.5% | ▼−40% Reduced · −32K sh | |
| 21 | Berkshire Hathaway Inc Del Common Stock | $27.0M | 56.3K | 1.5% | ▼−23% Reduced · −17K sh | |
| 22 | Synopsys Inc Common Stock | $26.3M | 66.2K | 1.5% | ▲+39% Added · +19K sh | |
| 23 | Lincoln Elec Hldgs Inc Common Stock | $26.0M | 104.2K | 1.5% | ▲17× Added · +98K sh | |
| 24 | United Rentals Inc Common Stock | $25.6M | 35.2K | 1.4% | ▼−30% Reduced · −15K sh | |
| 25 | Ishares TR Exchange Traded Fund | $23.9M | 520.0K | 1.3% | —Held | |
| 26 | Monolithic PWR Sys Inc Common Stock | $22.7M | 20.8K | 1.3% | ▼−56% Reduced · −26K sh | |
| 27 | Intercontinental Exchange In Common Stock | $22.2M | 141.4K | 1.2% | ▼−23% Reduced · −43K sh | |
| 28 | Johnson & Johnson Common Stock | $13.5M | 55.3K | 0.8% | ▼−23% Reduced · −16K sh | |
| 29 | Alphabet Inc Common Stock | $12.9M | 45.1K | 0.7% | ▼−31% Reduced · −20K sh | |
| 30 | Broadcom Inc Common Stock | $12.9M | 41.7K | 0.7% | ▼−84% Reduced · −214K sh | |
| 31 | Kosmos Energy Ltd Common Stock | $11.1M | 4.01M | 0.6% | —Held | |
| 32 | McDonalds Corp Common Stock | $9.7M | 31.1K | 0.5% | ▲+55% Added · +11K sh | |
| 33 | Coca-Cola Europacific Partne Common Stock | $8.5M | 93.6K | 0.5% | ▼−4.3% Reduced · −4K sh | |
| 34 | Coca Cola Co Common Stock | $8.4M | 110.7K | 0.5% | ▼−18% Reduced · −25K sh | |
| 35 | Waste Mgmt Inc Del Common Stock | $7.7M | 33.7K | 0.4% | ▲+17% Added · +5K sh | |
| 36 | Cisco Sys Inc Common Stock | $7.3M | 94.0K | 0.4% | ▲+26% Added · +19K sh | |
| 37 | Procter & Gamble Co Common Stock | $7.2M | 50.1K | 0.4% | ▼−20% Reduced · −12K sh | |
| 38 | Cboe Global MKTS Inc Common Stock | $7.0M | 25.0K | 0.4% | ▼−1.8% Reduced · −470 sh | |
| 39 | Abbvie Inc Common Stock | $6.5M | 30.0K | 0.4% | ▲+24% Added · +6K sh | |
| 40 | Cencora Inc Common Stock | $6.1M | 19.4K | 0.3% | ▼−10% Reduced · −2K sh | |
| 41 | Tesla Inc Common Stock | $6.0M | 16.1K | 0.3% | ▼−17% Reduced · −3K sh | |
| 42 | Cme Group Inc Common Stock | $6.0M | 20.3K | 0.3% | ▼−19% Reduced · −5K sh | |
| 43 | Ametek Inc Common Stock | $6.0M | 27.9K | 0.3% | ▲+33% Added · +7K sh | |
| 44 | McKesson Corp Common Stock | $5.9M | 6.9K | 0.3% | ▼−34% Reduced · −3K sh | |
| 45 | Exelon Corp Common Stock | $5.9M | 120.5K | 0.3% | ▲+93% Added · +58K sh | |
| 46 | Exxon Mobil Corp Common Stock | $5.9M | 34.5K | 0.3% | ▲+4.5% Added · +1K sh | |
| 47 | Mondelez Intl Inc Common Stock | $5.5M | 95.0K | 0.3% | ▲+58% Added · +35K sh | |
| 48 | Hubbell Inc Common Stock | $5.4M | 10.9K | 0.3% | ▲+23% Added · +2K sh | |
| 49 | Medtronic PLC Common Stock | $5.1M | 58.5K | 0.3% | ▲+71% Added · +24K sh | |
| 50 | General Mills Inc Common Stock | $5.0M | 135.2K | 0.3% | ▲+67% Added · +54K sh |
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 | 562 | $1.8B | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Feb 13, 2026 | 572 | $2.1B | 13F-HR |
| Q3 2025 | Sep 30, 2025 | Nov 14, 2025 | 570 | $2.2B | 13F-HR |
| Q2 2025 | Jun 30, 2025 | Aug 13, 2025 | 571 | $2.1B | 13F-HR |
| Q1 2025 | Mar 31, 2025 | May 14, 2025 | 642 | $1.9B | 13F-HR |
| Q4 2024 | Dec 31, 2024 | Feb 13, 2025 | 627 | $1.2B | 13F-HR |
| Q3 2024 | Sep 30, 2024 | Nov 13, 2024 | 635 | $1.2B | 13F-HR |
| Q2 2024 | Jun 30, 2024 | Aug 13, 2024 | 644 | $1.1B | 13F-HR |
| Q1 2024 | Mar 31, 2024 | May 13, 2024 | 654 | $1.3B | 13F-HR |
| Q4 2023 | Dec 31, 2023 | Feb 13, 2024 | 659 | $1.2B | 13F-HR |
| Q3 2023 | Sep 30, 2023 | Nov 14, 2023 | 680 | $1.1B | 13F-HR |
| Q2 2023 | Jun 30, 2023 | Aug 11, 2023 | 672 | $1.2B | 13F-HR |
| Q1 2023 | Mar 31, 2023 | May 12, 2023 | 671 | $1.1B | 13F-HR |
| Q3 2020 | Sep 30, 2020 | Nov 12, 2020 | 56 | $155.0M | 13F-HR |
| Q2 2020 | Jun 30, 2020 | Aug 13, 2020 | 67 | $168.1M | 13F-HR |
| Q1 2020 | Mar 31, 2020 | May 14, 2020 | 64 | $145.1M | 13F-HR |
| Q4 2019 | Dec 31, 2019 | Feb 14, 2020 | 76 | $210.3M | 13F-HR |
| Q3 2019 | Sep 30, 2019 | Nov 13, 2019 | 77 | $199.8M | 13F-HR |
| Q2 2019 | Jun 30, 2019 | Aug 13, 2019 | 144 | $360.9M | 13F-HR |
| Q1 2019 | Mar 31, 2019 | May 15, 2019 | 142 | $305.2M | 13F-HR |
| Q4 2018 | Dec 31, 2018 | Feb 14, 2019 | 154 | $254.8M | 13F-HR |
Holdings from SEC EDGAR 13F-HR filings, updated quarterly ~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.