WELLINGTON MANAGEMENT GROUP LLP

Position in ALT — Altimmune, Inc.

CIK 902219 Boston, MA

Position in ALT

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

Position Value

$764,325

-$164,422 QoQ

Shares Held

248,158

-3.5% QoQ

Ownership

0.128%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2024

9 quarters on record

Voting authority Sole 0.ToString("F0")% Shared 70.58124259544323.ToString("F0")% None 29.41875740455677.ToString("F0")%

Healthcare · as of Mar 31, 2026

WELLINGTON MANAGEMENT GROUP LLP holds $14,418,547,095 across 180 Biotechnology names. ALT ranks #158 (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

9 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$764,325	248,158	-3.5%	Shares	Defined	2026-05-15
2025-12-31	$928,747	257,271	-2.8%	Shares	Defined	2026-02-17
2025-09-30	$998,302	264,802	+5.1%	Shares	Defined	2025-11-14
2025-06-30	$974,720	251,866	+12.0%	Shares	Defined	2025-08-14
2025-03-31	$1,124,770	224,954	+9.6%	Shares	Defined	2025-05-13
2024-12-31	$1,479,729	205,233	+4.1%	Shares	Defined	2025-02-12
2024-09-30	$1,211,004	197,232	+27.5%	Shares	Defined	2024-11-14
2024-06-30	$1,028,615	154,679	-1.4%	Shares	Defined	2024-08-14
2024-03-31	$1,597,384	156,914	—	Shares	Defined	2024-05-15
No filing history on record for this holder in this stock.