PROLUNG INC (LUNG) is a publicly traded company in the Unknown sector. Across all available filings, 18 corporate insiders have executed 319 transactions totaling $200.4M, demonstrating a bearish sentiment with -$196.6M in net insider flow. The most recent transaction on Dec 8, 2025 involved a sale of 23,321 shares valued at $46.4K.
No significant insider buying has been recorded for LUNG in the recent period.
No significant insider selling has been recorded for LUNG in the recent period.
Based on recent SEC filings, insider sentiment for LUNG is bearish with an Insider Alignment Score of 1/100 and a net flow of -$196.6M. Insiders are reducing their positions, though this can be driven by factors unrelated to company outlook.
Insider trading at PROLUNG INC (LUNG) refers to stock transactions made by corporate insiders—executives, directors, and beneficial owners holding more than 10% of the company's shares. These individuals have access to material non-public information and are required by law to report their trades to the SEC within two business days. Currently, 18 insiders are actively trading LUNG stock, having executed 319 transactions in the past 90 days. The most active insider is Scientific Corp Boston (Executive), who has made 10 transactions totaling $177.0M.
Get notified when executives and directors at LUNG file new Form 4 transactions
Date | Insider | Title | Type | Shares | Price | Value | Flags |
|---|---|---|---|---|---|---|---|
| Dec 8, 2025 | P. Florin Daniel | Executive | Sale | 23,321 | $1.99 | $46.4K | |
| Dec 1, 2025 | Aaron Lehman David | Executive | Sale | 3,401 | $1.57 | $5.3K | |
| Dec 1, 2025 | Aaron Lehman David | Executive | Sale | 976 | $1.57 | $1.5K | |
| Dec 1, 2025 | Aaron Lehman David | Executive | Sale | 3,725 | $1.57 | $5.8K | |
| Dec 1, 2025 | Aaron Lehman David | Executive | Sale | 2,176 | $1.57 | $3.4K | |
| Dec 1, 2025 | Sung Derrick | Executive | Award | 1,200,000 | $N/A | $0 | |
| Dec 1, 2025 | Beran Rose Geoffrey | Executive | Sale | 2,379 | $1.57 | $3.7K | |
| Dec 1, 2025 | Beran Rose Geoffrey | Executive | Sale | 683 | $1.57 | $1.1K | |
| Dec 1, 2025 | Beran Rose Geoffrey | Executive | Sale | 1,738 | $1.57 | $2.7K | |
| Dec 1, 2025 | Beran Rose Geoffrey | Executive | Sale | 1,522 | $1.57 | $2.4K | |
| Dec 1, 2025 | E. French Glendon III | Executive | Sale | 6,281 | $1.57 | $9.9K | |
| Dec 1, 2025 | E. French Glendon III | Executive | Award | 1,200,000 | $N/A | $0 | |
| Dec 1, 2025 | E. French Glendon III | Executive | Sale | 2,524 | $1.57 | $4.0K | |
| Sep 2, 2025 | Aaron Lehman David | Executive | Sale | 929 | $1.60 | $1.5K | |
| Sep 2, 2025 | Aaron Lehman David | Executive | Sale | 3,231 | $1.60 | $5.2K |
| TYPE | COUNT | VALUE | % |
|---|---|---|---|
Sale(S) | 225 | $198.5M | 98.9% |
Purchase(P) | 10 | $1.9M | 0.9% |
Exercise(M) | 9 | $302.0K | 0.2% |
Award(A) | 51 | $0 | 0.0% |
Gift(G) | 1 | $0 | 0.0% |
Conversion(C) | 22 | $0 | 0.0% |
Other(J) | 1 | $0 | 0.0% |
Insider selling pressure at PROLUNG INC has increased, with 18 insiders executing 319 transactions across all time. Total sales of $198.5M significantly outpace purchases of $1.9M, resulting in a net outflow of $196.6M. This selling activity appears largely discretionary, which may warrant closer attention from investors.