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$LUNG
$1.95 +$0.12 (6.56%) Close

Ownership

13F as of Q2 2026 · 42.9M shares outstanding

Who owns LUNG?

By type of holder
Institutions 60.9% Insiders 23.1% Everyone else 16.1%
Concentration Top 10 holders own 50.6%
Primecap Management Co/ca/ 10.7% · Morgan Stanley 6.8%
Institutional ownership
60.9%
-13.2 pts vs last qtr
Institutional holders
106
-8 vs last qtr
Net shares bought
−5.7M
by institutions in Q2 2026
New / sold out
19 / 27
positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026
  • Almitas Capital LLC NEW +1.1M
  • Jane Street Group, LLC +625.0K

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Biggest sellers in Q2 2026
  • BlackRock, Inc. −1.8M
  • Bank Of America Corp /de/ SOLD OUT −1.2M

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Who is planning to sell?

Notices of proposed sale, last 12 months
$235K
4 notices from 2 people
Shares covered
119.2K
0.28% of the company
Arranged in advance
20%
of the value is under a 10b5-1 plan
Under a 10b5-1 plan No plan
$0$94.2K$188.5KNovDec 2025: $46.4K under a 10b5-1 planDecJan 2026: $188.5K without a planJanFebMarAprMayJunJulAugSepOct
Largest proposed sellers
  • Steven Williamson Officer $188K
  • Daniel P Florin Director 10b5-1 $46.4K
Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2020–FY2025
+299.5%
+31.92% a year
Each share's claim on the business
−75.0%
shrank without buying or selling a share
Spent on buybacks vs paid in stock
$74K vs $96.5M
over 6 fiscal years
Diluted shares, split-adjusted
9.9M25.5M41.1M2020: 10.2M shares'202021: 36.1M shares'212022: 37.1M shares'222023: 38.0M shares'232024: 39.1M shares'242025: 40.7M shares'25
Buybacks Stock-based comp
$0$11.5M$23.0M2020 buybacks: $21.0K2020 stock comp: $3.2M'202021 buybacks: $26.0K2021 stock comp: $10.5M'212022 buybacks: $27.0K2022 stock comp: $16.4M'222023 buybacks: $02023 stock comp: $22.1M'232024 buybacks: $02024 stock comp: $23.0M'242025 buybacks: $02025 stock comp: $21.2M'25

How patient are the owners?

Institutional shares by how long they've been held
5+ years46% 3–5 years9% 1–3 years17% Under 1 year28%
Quarterly turnover
21.4%
of institutional shares changed hands
Top 10 managers, median time held
3.5 years

Super Investors

Investment managers reporting LUNG on Form 13F
PM
Primecap Management Co/ca/
Shares
4.6M
% of company
10.74%
Change vs last qtr
−112.7K (−2.4%)
Held since
≤2021
MS
Morgan Stanley
Shares
2.9M
% of company
6.81%
Change vs last qtr
−1.1M (−26.8%)
Held since
≤2021

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Institutional Funds

Mutual funds and ETFs reporting LUNG on Form N-PORT; together they hold 20.5% of the company
PO
Position value
$5.71M
% of company
8.15%
% of the fund
0.08%
As of
July 31, 2026
VT
Position value
$1.5M
% of company
2.68%
% of the fund
0.00%
As of
June 30, 2026

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Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G
FR
Ferrari Richard M
Insider
Shares
2.6M
% of company
6.03%
Change vs last qtr
—
Held since
—
FG
French Glendon E. III
Insider
Shares
2.1M
% of company
4.85%
Change vs last qtr
—
Held since
—

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