# DAY ONE BIOPHARMACEUTICALS I COM

DAY ONE BIOPHARMACEUTICALS I COM is a security (CUSIP 23954D109) tracked across SEC portfolio filings. 169 institutional managers reported $1.6B on Form 13F as of 2026-06-30; 14 registered fund positions totaling $28.4M via N-PORT as of 2026-03-31.

## Summary

- Issuer: DAY ONE BIOPHARMACEUTICALS I
- Class: COM
- CUSIP: 23954D109
- Asset category: EC
- 13F holders: 169
- 13F value: $1.6B
- 13F period: 2026-06-30
- N-PORT fund positions: 14
- N-PORT value: $28.4M
- N-PORT report: 2026-03-31

## Top institutional holders (Form 13F)

_Showing 15 of 169 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| BlackRock, Inc. | New York, NY | $151.0M | 7,044,487 |
| FIL Ltd | HAMILTON, D0 | $88.6M | 4,131,907 |
| [Kryger Capital LLC](https://search.stillhousedata.com/firm/318571) | HAMILTON, D0 | $83.5M | 3,896,485 |
| DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) | New York, NY | $79.8M | 3,723,131 |
| JPMORGAN CHASE & CO | NEW YORK, NY | $67.1M | 3,134,753 |
| STATE STREET CORP | BOSTON, MA | $61.5M | 2,869,876 |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $58.6M | 6,282,376 |
| [Balyasny Asset Management L.P.](https://search.stillhousedata.com/firm/138111) | Chicago, IL | $56.3M | 2,625,235 |
| [AQR Arbitrage LLC](https://search.stillhousedata.com/firm/114626) | Greenwich, CT | $52.8M | 2,462,154 |
| UBS Group AG | Zurich, V8 | $49.4M | 2,305,123 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $41.9M | 1,954,735 |
| [Qube Research & Technologies Ltd](https://search.stillhousedata.com/firm/304552) | LONDON, X0 | $41.9M | 1,954,552 |
| MILLENNIUM MANAGEMENT LLC | NEW YORK, NY | $41.3M | 1,927,557 |
| BANK OF AMERICA CORP /DE/ | CHARLOTTE, NC | $40.8M | 1,902,868 |
| O'Connor Alternative Investments LLC | NEW YORK, NY | $40.0M | 1,867,553 |

## Top fund holders (N-PORT)

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $17.5M | 2.14% |
| GDL Fund | GDL Fund | $4.5M | 387.62% |
| [Master Small Cap Index Series](https://search.stillhousedata.com/fund/S000002716) | Quantitative Master Series LLC | $2.8M | 5.75% |
| [VANGUARD BALANCED INDEX FUND](https://search.stillhousedata.com/fund/S000002560) | VANGUARD VALLEY FORGE FUNDS | $934K | 0.16% |
| [VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002855) | VANGUARD INSTITUTIONAL INDEX FUNDS | $840K | 0.28% |
| [The Gabelli ABC Fund](https://search.stillhousedata.com/fund/S000001070) | Gabelli Investor Funds Inc | $643K | 15.46% |
| Gabelli Healthcare & WellnessRx Trust | Gabelli Healthcare & WellnessRx Trust | $429K | 28.99% |
| [Comstock Capital Value Fund](https://search.stillhousedata.com/fund/S000001057) | Comstock Funds, Inc. | $300K | 292.14% |
| [BlackRock Advantage SMID Cap Fund, Inc.](https://search.stillhousedata.com/fund/S000002323) | BlackRock Advantage SMID Cap Fund, Inc. | $282K | 3.74% |
| [DWS Small Cap Index VIP](https://search.stillhousedata.com/fund/S000006223) | DEUTSCHE DWS INVESTMENTS VIT FUNDS | $236K | 5.62% |
| [TIAA Separate Account VA-1 - Stock Index Account](https://search.stillhousedata.com/fund/S000005098) | TIAA Separate Account VA-1 | $16K | 0.12% |
| [Blackstone Alternative Multi-Strategy Fund](https://search.stillhousedata.com/fund/S000045538) | Blackstone Alternative Investment Funds | $11K | 0.03% |
| [Enterprise Mergers and Acquisitions Fund](https://search.stillhousedata.com/fund/S000017793) | Gabelli 787 Fund, Inc. | $9K | 1.51% |
| [Humankind U.S. Stock ETF](https://search.stillhousedata.com/fund/S000069946) | Humankind Benefit Corp | $6K | 0.39% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/23954D109.md)
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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.