Company · Ownership research

Day One Biopharmaceuticals, Inc. DAWN

CIK 0001845337 · CUSIP 23954D109

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 23954D109, not CUSIP 23954D959, CUSIP 23954D909, and does not merge CUSIPs.

This page lists the top 20 of 168 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	RA CAPITAL MANAGEMENT, L.P. CIK 1346824 · View history	$109.65M 7,871,721 shares	1.26%	0(0.00%)Unchanged	SEC filing ↗ Nov 14, 2024	▾
02	FMR LLC CIK 315066 · Amended · View history	$103.25M 7,412,380 shares	0.01%	+4.75M(+178.50%)Added	SEC filing ↗ Nov 13, 2024	▾
03	Atlas Venture Life Science Advisors, LLC CIK 1917529 · View history	$89.57M 6,430,257 shares	8.30%	0(0.00%)Unchanged	SEC filing ↗ Nov 13, 2024	▾
04	VANGUARD GROUP INC CIK 102909 · View history	$82.01M 5,887,210 shares	0.00%	+1.26M(+27.30%)Added	SEC filing ↗ Nov 13, 2024	▾
05	BRAIDWELL LP CIK 1920938 · View history	$67.89M 4,873,853 shares	1.92%	+1.84M(+60.50%)Added	SEC filing ↗ Nov 14, 2024	▾
06	BlackRock, Inc. CIK 2012383 · View history	$65.60M 4,709,162 shares	0.00%	—	SEC filing ↗ Nov 13, 2024	▾
07	FRANKLIN RESOURCES INC CIK 38777 · Amended · View history	$55.34M 3,869,632 shares	0.02%	+87.26K(+2.30%)Added	SEC filing ↗ Nov 27, 2024	▾
08	Fairmount Funds Management LLC CIK 1802528 · View history	$43.23M 3,103,448 shares	3.51%	+3.10MNew	SEC filing ↗ Nov 14, 2024	▾
09	Pictet Asset Management Holding SA CIK 1993888 · View history	$41.55M 2,982,666 shares	0.05%	+131.09K(+4.60%)Added	SEC filing ↗ Nov 12, 2024	▾
10	STATE STREET CORP CIK 93751 · View history	$39.34M 2,823,817 shares	0.00%	-3.00K(-0.10%)Reduced	SEC filing ↗ Nov 14, 2024	▾
11	Estuary Capital Management LP CIK 1965005 · View history	$38.22M 2,743,780 shares	10.25%	+108.51K(+4.10%)Added	SEC filing ↗ Nov 14, 2024	▾
12	DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) CIK 1009258 · View history	$36.46M 2,617,713 shares	0.54%	-305.42K(-10.40%)Reduced	SEC filing ↗ Nov 14, 2024	▾
13	VIKING GLOBAL INVESTORS LP CIK 1103804 · View history	$35.64M 2,558,563 shares	0.13%	0(0.00%)Unchanged	SEC filing ↗ Nov 14, 2024	▾
14	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$35.45M 2,544,863 shares	0.00%	+193.98K(+8.30%)Added	SEC filing ↗ Nov 14, 2024	▾
15	Vestal Point Capital, LP CIK 1974915 · View history	$34.83M 2,500,000 shares	2.75%	+1.25M(+100.00%)Added	SEC filing ↗ Nov 14, 2024	▾
16	JANUS HENDERSON GROUP PLC CIK 1274173 · View history	$30.31M 2,177,197 shares	0.02%	+337.93K(+18.40%)Added	SEC filing ↗ Nov 14, 2024	▾
17	MAVERICK CAPITAL LTD CIK 934639 · View history	$29.45M 2,114,006 shares	0.57%	+902.87K(+74.50%)Added	SEC filing ↗ Nov 14, 2024	▾
18	TimesSquare Capital Management, LLC CIK 1313816 · View history	$25.46M 1,827,695 shares	0.38%	+139.16K(+8.20%)Added	SEC filing ↗ Nov 4, 2024	▾
19	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$24.72M 1,774,307 shares	0.00%	-128.80K(-6.80%)Reduced	SEC filing ↗ Nov 14, 2024	▾
20	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$19.96M 1,432,697 shares	0.00%	+136.46K(+10.50%)Added	SEC filing ↗ Nov 12, 2024	▾

Showing 20 / 168 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

168

Cancelled or null records excluded

Disclosed shares

92,050,060

Not deduplicated across managers

Disclosed value

$1.28B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

Day One Biopharmaceuticals, Inc. · Q3 2024

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.