WELLINGTON MANAGEMENT GROUP LLP

Position in PHAT — Phathom Pharmaceuticals, Inc.

CIK 902219 Boston, MA

Position in PHAT

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$1,241,563

-$990,554 QoQ

Shares Held

111,752

-16.9% QoQ

Ownership

0.140%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Jun 2023

11 quarters on record

Voting authority Sole 0% Shared 71% None 29%

Healthcare · as of Mar 31, 2026

WELLINGTON MANAGEMENT GROUP LLP holds $14,419,413,768 across 180 Biotechnology names. PHAT ranks #131 (0.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	VRTX	Vertex Pharmaceuticals Inc / Ma	3,212,589	$1,434,549,489
2	REGN	Regeneron Pharmaceuticals, Inc.	1,837,459	$1,419,694,318
3	ARGX	Argenx SE	1,021,457	$745,918,971
4	ALNY	Alnylam Pharmaceuticals, Inc.	1,935,925	$640,539,501
5	RVMD	Revolution Medicines, Inc.	6,027,819	$586,205,394
6	CYTK	Cytokinetics Inc	8,009,489	$527,905,416
7	IONS	Ionis Pharmaceuticals Inc	6,391,816	$479,961,458
8	ASND	Ascendis Pharma A/S	1,757,633	$402,023,391

11 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$1,241,563	111,752	-16.9%	Shares	Defined	2026-05-15
2025-12-31	$2,232,117	134,546	-8.1%	Shares	Defined	2026-02-17
2025-09-30	$1,723,820	146,459	-27.0%	Shares	Defined	2025-11-14
2025-03-31	$1,258,325	200,690	+47.6%	Shares	Defined	2025-05-13
2024-12-31	$1,104,279	135,995	-21.6%	Shares	Defined	2025-02-12
2024-09-30	$3,134,764	173,383	-23.5%	Shares	Defined	2024-11-14
2024-06-30	$2,334,401	226,641	+1.5%	Shares	Defined	2024-08-14
2024-03-31	$2,372,400	223,390	+44.7%	Shares	Defined	2024-05-15
2023-12-31	$1,409,589	154,391	+54.7%	Shares	Defined	2024-02-12
2023-09-30	$1,035,029	99,810	+1.8%	Shares	Defined	2023-11-14
2023-06-30	$1,403,545	98,013	—	Shares	Defined	2023-08-14
No filing history on record for this holder in this stock.