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Possible new Pulmatrix shares

PULMDilution

Last raise Oct 26, 2026, 424B3: 492K shares (13.5% of the 3.7M then)

Known so far: no new shares from the prospectus covers read · shelf room about $8.4M · not yet read: warrants, converts, options, ATM.

Shelf room

  • Room today about $8.4M, maybe lower
  • One third of float $8.4M ($25.2M float, Jun 30, 2025)
  • Sold off it, 12 months nothing
How this is worked out

Shelf room about $8.4M on the S-3 of Oct 5, 2026: the baby-shelf rule (public float under $75M) caps sales at one third of the $25.2M public float stated as of Jun 30, 2025, $8.4M, nothing sold off it in the last 12 months; 1 more sale off the shelf with no size read, so the room may be lower. Sources: S-3/A Oct 5, 2026, effective Oct 22, 2026 · public float, as of Jun 30, 2025 · 424B3 Oct 26, 2026.

What could become new Pulmatrix (PULM) shares, from its 10-Q, 10-K, S-3 or 424B filings.

Read so far: the cover share count (3.7M shares, +0% from 3.7M on Jul 31, 2025). Not read yet: warrants, convertible notes, options and RSUs and an ATM program. Read them on EDGAR: the latest 10-Q · S-3 shelf filings.

Shares outstanding

3.7M

Nov 2024 to Aug 2026: from 3.7M to 3.7M.

From the share count on the cover of each 10-Q and 10-K, dated as each cover states.