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ALT in the 13F filings

Altimmune Inc · CUSIP 02155H200

Sector · Pharmaceuticals and biotechnologyTheme · Healthcare: biopharma and medtech· L3VLUP-definedTheme · Pharmaceutical preparations
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q4 2022
Quarter end
30 Jun 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 3 Aug 2026
Managers listing it
24
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q1 2026 and Q2 2026; 0 listed it in both
Shares listed
28,766,450
combined, among listed positions
Reported value
$87m
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 20 buyers (opened or added shares) and 7 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +14,134,727.

Managers listing ALT in Q2 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q1 2026, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

24 of 24 holders

ActionFiling
Marshall Wace LLP6,841,055$21munder 0.1%Added+2,823,15413 Aug 2026 (the filing on sec.gov)
Viking Global Investors LP6,700,000$20m0.06%Newnew14 Aug 2026 (the filing on sec.gov)
Woodline Partners LP3,400,312$10munder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
Millennium Management LLC3,309,122$10munder 0.1%Added+50,93114 Aug 2026 (the filing on sec.gov)
Two Sigma Investments LP2,381,142$7.2munder 0.1%Trimmed-97,75814 Aug 2026 (the filing on sec.gov)
AQR Capital Management LLC1,220,949$3.7munder 0.1%Added+1,135,49514 Aug 2026 (the filing on sec.gov)
Citadel Advisors LLC983,559$3.0munder 0.1%Added+534,6862 Sep 2026 (the filing on sec.gov)
Fidelity (FMR LLC)748,974$2.3munder 0.1%Added+75,01013 Aug 2026 (the filing on sec.gov)
Susquehanna International Group LLP731,078$2.2munder 0.1%Trimmed-594,87814 Aug 2026 (the filing on sec.gov)
Point72 Asset Management LP486,884$1.5munder 0.1%Trimmed-178,40514 Aug 2026 (the filing on sec.gov)
Wellington Management Group LLP420,300$1.3munder 0.1%Added+172,14214 Aug 2026 (the filing on sec.gov)
Invesco Ltd332,592$1.0munder 0.1%Added+104,73514 Aug 2026 (the filing on sec.gov)
Squarepoint Ops LLC202,380$615kunder 0.1%Added+184,25414 Aug 2026 (the filing on sec.gov)
D. E. Shaw & Co.201,638$613kunder 0.1%Trimmed-525,36314 Aug 2026 (the filing on sec.gov)
Man Group PLC173,872$529kunder 0.1%Added+44,02614 Aug 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc165,390$503kunder 0.1%Added+72,87814 Aug 2026 (the filing on sec.gov)
AllianceBernstein LP140,850$434kunder 0.1%Added+69,09014 Aug 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP130,781$398kunder 0.1%Added+52,37814 Aug 2026 (the filing on sec.gov)
Renaissance Technologies LLC71,600$218kunder 0.1%Newnew13 Aug 2026 (the filing on sec.gov)
Quantbot Technologies LP45,632$139kunder 0.1%Newnew12 Aug 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC35,077$107kunder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
Neuberger Berman Group LLC18,664$57kunder 0.1%Newnew27 Oct 2026 (the filing on sec.gov)
Winton Group Ltd16,100$49kunder 0.1%Newnew7 Aug 2026 (the filing on sec.gov)
Walleye Capital LLC8,499$26kunder 0.1%Added+8,4973 Aug 2026 (the filing on sec.gov)

Largest increases and reductions, by shares

Q1 2026 to Q2 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (7)

Exited (3)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
1 in Q3 2024 to 1 in Q2 2026

Tracked managers listing it, at least.

02462022202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
ALT by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20201$8.4mn.a.n.a.
Q3 20201$952kn.a.n.a.
Q2 20211$15mn.a.n.a.
Q3 20211$3.9mn.a.n.a.
Q4 20212$6.8mn.a.n.a.
Q1 20222$5.9mn.a.n.a.
Q2 20222$8.0mn.a.n.a.
Q3 20224$89mn.a.n.a.
Q4 20225$133mn.a.n.a.
Q4 20231$382k10
Q1 20242$7.0m20
Q2 20241$184k01
Q3 20241$169k00
Q4 20241$199k00
Q1 20251$138k00
Q2 20251$107k00
Q3 20251$104k00
Q4 20251$100k149
Q1 20261$85k1012
Q2 20261$20m207

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

ALT and LLY →ALT and JNJ →ALT and VRTX →Choose a stock to compare with ALT →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own ALT, latest filings →Back to the 13F Explorer →