Atom Investors LP holds a diversified book of 818 reported positions worth $1.1B as of Q2 2026 (disclosed Aug 14, 2026, a ~45-day 13F lag). This quarter Avalyn Pharma Inc first appears in 13F filings (one of 7 new listings in the book), a listing rather than a purchase; they opened Hewlett Packard Enterprise and trimmed Vanguard S&P 500 ETF. Their largest long position is Vanguard S&P 500 ETF at 4% of the reported non-option book. Cloning the disclosed picks since 2019 would be +135% (+11.9%/yr). That is a simulation of the disclosed long book, not audited returns.
The reported book (valued from quarter-end) returned +165.8%, a 30.7-point gap that is the cost of the ~45-day 13F disclosure lag a real follower can't avoid.
Growth of $10,000 cloning Atom Investors LP's disclosed long 13F book, rebalanced on each filing date (so it reflects each quarter's actual reporting lag, ~45 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: diversified book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
93% mapped to company sectors
+5 sectors below the cut, 11% together
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 (an exit at the prior quarter-end), no cost basis
Other tracked managers holding the same core names as Atom Investors LP
| Manager / fund | Shared names | Their $ in those |
|---|---|---|
| Hoey Investments, Inc | 25 / 80 | $526.3M |
| Ketron Financial | 11 / 80 | $216.8M |
| Independent Investors Inc | 10 / 80 | $335.6M |
| Skandinaviska Enskilda Banken AB (publ) | 16 / 80 | $1.7B |
| Oakmont Corp | 9 / 80 | $301.9M |
| Campbell Capital Management Inc | 8 / 80 | $167.3M |
| V. M. Manning & Co., Inc. | 8 / 80 | $69.9M |
| Silphium Asset Management Ltd | 10 / 80 | $177.4M |
Ranked by the share of each fund's own book sitting in the names it shares with Atom Investors LP: only funds sharing at least a tenth of the book qualify. Index giants, bank custody books and market makers are excluded. They hold everything, so their overlap says nothing.
Bars show each position's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Vanguard Index FDS S&P 500 ETF SHS | $46.0M | 67.0K | 4.1% | ▼−0.1% Reduced · −69 sh | |
| 2 | Viatris Inc COM | $11.2M | 705.7K | 1.0% | ▲+561% Added · +599K sh | |
| 3 | Intel Corp COM | $10.6M | 76.0K | 0.9% | ▲+262% Added · +55K sh | |
| 4 | Hewlett Packard Enterprise C COM | $9.7M | 215.3K | 0.9% | ▲New New position | |
| 5 | Rhythm Pharmaceuticals Inc COM | $8.2M | 73.5K | 0.7% | ▲+29% Added · +16K sh | |
| 6 | Esab Corporation COM | $8.1M | 82.4K | 0.7% | ▲+238% Added · +58K sh | |
| 7 | Ishares Inc MSCI BRAZIL ETF | $8.1M | 234.8K | 0.7% | ▲New New position | |
| 8 | Gxo Logistics Incorporated COMMON STOCK | $8.0M | 156.9K | 0.7% | ▲+44% Added · +48K sh | |
| 9 | Applied Matls Inc COM | $7.0M | 9.7K | 0.6% | ▼−50% Reduced · −10K sh | |
| 10 | Broadcom Inc COM | $6.8M | 18.1K | 0.6% | ▼−51% Reduced · −19K sh | |
| 11 | Nvidia Corporation COM | $6.8M | 33.9K | 0.6% | ▼−41% Reduced · −23K sh | |
| 12 | Vse Corp COM | $6.5M | 28.4K | 0.6% | ▲New New position | |
| 13 | Apple Inc COM | $6.3M | 21.8K | 0.6% | ▲New New position | |
| 14 | Immunome Inc COM | $6.3M | 297.5K | 0.6% | ▼−3.1% Reduced · −9K sh | |
| 15 | JBT Marel Corporation COM | $6.2M | 42.5K | 0.5% | ▲New New position | |
| 16 | Verisign Inc COM | $6.1M | 24.3K | 0.5% | ▲+308% Added · +18K sh | |
| 17 | Equinix Inc COM | $6.0M | 5.7K | 0.5% | ▼−52% Reduced · −6K sh | |
| 18 | Invesco Exchange Traded FD T S&P500 EQL WGT | $5.9M | 27.8K | 0.5% | ▲New New position | |
| 19 | Home Depot Inc COM | $5.9M | 16.7K | 0.5% | ▲New New position | |
| 20 | Ultragenyx Pharmaceutical In COM | $5.7M | 171.8K | 0.5% | ▲+83% Added · +78K sh | |
| 21 | Graco Inc COM | $5.7M | 75.0K | 0.5% | ▲New New position | |
| 22 | Ametek Inc COM | $5.5M | 22.9K | 0.5% | ▲+62% Added · +9K sh | |
| 23 | Microsoft Corp COM | $5.4M | 14.6K | 0.5% | ▲+31% Added · +3K sh | |
| 24 | TTM Technologies Inc COM | $5.4M | 28.9K | 0.5% | ▲+245% Added · +21K sh | |
| 25 | Amazon Com Inc COM | $5.4M | 22.6K | 0.5% | ▼−54% Reduced · −26K sh | |
| 26 | Alphabet Inc CAP STK CL C | $5.4M | 15.2K | 0.5% | ▼−0.8% Reduced · −121 sh | |
| 27 | Zeta Global Holdings Corp CL A | $5.2M | 264.1K | 0.5% | ▲New New position | |
| 28 | Silgan Hldgs Inc COM | $5.0M | 107.3K | 0.4% | ▲New New position | |
| 29 | Ferguson Enterprises Inc COMMON STOCK NEW | $5.0M | 21.0K | 0.4% | ▲New New position | |
| 30 | Semtech Corp COM | $4.9M | 30.1K | 0.4% | ▲+303% Added · +23K sh | |
| 31 | Micron Technology Inc COM | $4.7M | 4.1K | 0.4% | ▲New New position | |
| 32 | Abbott Laboratories COM | $4.6M | 50.2K | 0.4% | ▲+140% Added · +29K sh | |
| 33 | Lincoln Elec Hldgs Inc COM | $4.5M | 16.9K | 0.4% | ▲+4.7% Added · +766 sh | |
| 34 | Lam Research Corp COM NEW | $4.1M | 9.5K | 0.4% | ▲New New position | |
| 35 | Consolidated Edison Inc COM | $3.9M | 35.7K | 0.4% | ▲+300% Added · +27K sh | |
| 36 | McGrath Rentcorp COM | $3.9M | 32.0K | 0.3% | ▲New New position | |
| 37 | Lowes Cos Inc COM | $3.9M | 17.6K | 0.3% | ▲New New position | |
| 38 | Mastercard Incorporated CL A | $3.8M | 7.4K | 0.3% | ▲New New position | |
| 39 | National Presto Inds Inc COM | $3.8M | 30.4K | 0.3% | ▲+6.6% Added · +2K sh | |
| 40 | Hni Corp COM | $3.8M | 93.9K | 0.3% | ▲+42% Added · +28K sh | |
| 41 | Reliance Inc COM | $3.7M | 10.0K | 0.3% | ▼−66% Reduced · −19K sh | |
| 42 | Supernus Pharmaceuticals COM | $3.7M | 79.9K | 0.3% | ▲+75% Added · +34K sh | |
| 43 | Gilead Sciences Inc COM | $3.7M | 29.0K | 0.3% | ▲New New position | |
| 44 | Dianthus Therapeutics Inc COM | $3.6M | 37.2K | 0.3% | ▼−65% Reduced · −71K sh | |
| 45 | Core & Main Inc CL A | $3.6M | 74.8K | 0.3% | ▲10× Added · +68K sh | |
| 46 | Celcuity Inc COM | $3.6M | 34.5K | 0.3% | ▼−55% Reduced · −42K sh | |
| 47 | Pepsico Inc COM | $3.6M | 26.3K | 0.3% | ▲New New position | |
| 48 | Syndax Pharmaceuticals Inc COM | $3.6M | 162.5K | 0.3% | ▲+4.2% Added · +7K sh | |
| 49 | NRG Energy Inc COM NEW | $3.5M | 24.2K | 0.3% | ▼−48% Reduced · −23K sh | |
| 50 | Malibu Boats Inc COM CL A | $3.5M | 127.4K | 0.3% | ▼−45% Reduced · −104K sh |
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/1738902/holdings"
Use Arkolith to show Atom Investors LP's latest holdings, largest changes, and filing provenance.
As-of date vs the date the SEC received each filing
Reported 13F total per quarter. Raw filing totals can include option notional.
| Quarter | As of | Filed | Lag | Positions | Value | Form |
|---|---|---|---|---|---|---|
| Q2 2026 | Jun 30, 2026 | Aug 14, 2026 | 45d | 818 | $1.1B | 13F-HR |
| Q1 2026 | Mar 31, 2026 | May 15, 2026 | 45d | 641 | $1.4B | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Feb 17, 2026 | 48d | 556 | $1.3B | 13F-HR |
| Q3 2025 | Sep 30, 2025 | Nov 14, 2025 | 45d | 584 | $1.3B | 13F-HR |
| Q2 2025 | Jun 30, 2025 | Aug 14, 2025 | 45d | 587 | $1.1B | 13F-HR |
| Q1 2025 | Mar 31, 2025 | May 15, 2025 | 45d | 488 | $812.9M | 13F-HR |
| Q4 2024 | Dec 31, 2024 | Feb 14, 2025 | 45d | 481 | $805.0M | 13F-HR |
| Q3 2024 | Sep 30, 2024 | Nov 14, 2024 | 45d | 456 | $955.2M | 13F-HR |
| Q2 2024 | Jun 30, 2024 | Aug 14, 2024 | 45d | 457 | $1.0B | 13F-HR |
| Q1 2024 | Mar 31, 2024 | May 15, 2024 | 45d | 564 | $801.5M | 13F-HR |
| Q4 2023 | Dec 31, 2023 | Feb 14, 2024 | 45d | 439 | $566.2M | 13F-HR |
| Q3 2023 | Sep 30, 2023 | Nov 14, 2023 | 45d | 421 | $438.6M | 13F-HR |
| Q2 2023 | Jun 30, 2023 | Aug 14, 2023 | 45d | 282 | $263.4M | 13F-HR |
| Q1 2023 | Mar 31, 2023 | May 15, 2023 | 45d | 247 | $183.8M | 13F-HR |
| Q4 2022 | Dec 31, 2022 | Feb 14, 2023 | 45d | 217 | $200.1M | 13F-HR |
| Q3 2022 | Sep 30, 2022 | Nov 8, 2022 | 39d | 274 | $284.3M | 13F-HR |
| Q2 2022 | Jun 30, 2022 | Aug 15, 2022 | 46d | 246 | $228.7M | 13F-HR |
| Q1 2022 | Mar 31, 2022 | May 16, 2022 | 46d | 186 | $213.9M | 13F-HR |
| Q4 2021 | Dec 31, 2021 | Feb 14, 2022 | 45d | 263 | $596.3M | 13F-HR |
| Q3 2021 | Sep 30, 2021 | Nov 15, 2021 | 46d | 302 | $1.2B | 13F-HR |
| Q2 2021 | Jun 30, 2021 | Aug 16, 2021 | 47d | 238 | $794.8M | 13F-HR |
| Q1 2021 | Mar 31, 2021 | May 17, 2021 | 47d | 237 | $598.1M | 13F-HR |
| Q4 2020 | Dec 31, 2020 | Feb 16, 2021 | 47d | 360 | $990.2M | 13F-HR |
| Q3 2020 | Sep 30, 2020 | Nov 13, 2020 | 44d | 495 | $1.0B | 13F-HR |
Holdings from SEC EDGAR 13F-HR filings, updated quarterly, filed up to 45 days after quarter-end. Public domain. Book totals and portfolio weights cover reported non-option positions, which can include notes and warrants. 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.