Septerna

SEPN on Nasdaq. The annual report text for SEPN was not included, so I cannot describe it. Market value $1.8bn.

Watch this stockFree. We tell you when something changes.

Price checks use the past 12 months to June 2026. Quality checks use five annual reports, the latest for the year to December 2025.

Should I look at this?

Not a fit for our list right now

See Health care stocks that passed both tests

This is not advice. Check the numbers below.

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Cash yield
past 12 months to June 2026
6.3%high

For every $100 of what the whole company costs, it produced $6.31 of spare cash in the past 12 months. A savings account pays about $4.

Price to profit
past 12 months to June 2026
n/a

The filings do not give us enough to work this out.

Return on capital
five annual reports to December 2025
n/a

The filings do not give us enough to work this out.

Quality score: not known. Price score: 33 of 100. Our list needs 70 on quality and 60 on price.

$35.67 a share, 103% above its 1-year low

Over the past year the price has ranged from $17.55 to $51.10.

Pays no dividend

Prices from Tuesday’s close (6 October).

Five years of cash, in billions

-0.1
0.1
0.1
2024202512 monthsto Jun '26
Revenue
$1m$46m
Operating margin
-7518.4%-148.6%
Debt to equity
0.000.00
Shares outstanding
0.04bn0.05bn

Health checks

  • Free cash flow positive1 of 2 years
  • Accounting looks honest (Beneish)Not enough data
  • Financial strength (Piotroski)3 of 8 checks we could run
  • Profit backed by cash (accruals)No
  • Debt0.00× equity
  • Revenue growth, five yearsUnknown
  • Buying back its own sharesRoughly flat

The quarter to June 2026

How the business did, compared with the same quarter a year earlier.

  • Sales: $27 million last quarter, up 22376% on a year ago.
  • A loss of $13 million, compared with a loss of $25 million a year ago.
  • It loses 44 cents on each $1 of sales, compared with 14071 cents a year earlier.
  • Spare cash over the past 12 months: $105 million. A year earlier it spent $83 million more than it brought in.
  • 2% more shares than a year ago. Each share owns a bit less of the company.
  • It has $85 million more cash than debt, down from $189 million a year ago.
  • Sales grew on a year ago in each of the last 4 quarters.
Sales by quarter
Sales by quarter
Quarter toAmount
September 2024$176,000
December 2024$212,000
March 2025$219,000
June 2025$119,000
September 2025$21m
December 2025$24m
March 2026$27m
June 2026$27m
Profit by quarter
Profit by quarter
Quarter toAmount
September 2024-$21m
December 2024-$21m
March 2025-$21m
June 2025-$25m
September 2025$8m
December 2025-$11m
March 2026-$9m
June 2026-$13m

From the company's quarterly reports to the SEC.

Dates

Next results (estimated)
n/a
Last annual report (10-K)
9 March 2026
Next quarterly (estimated, 10-Q)
9 November 2026

Who owns it

1 long-term investor we follow owns it, up from 0 last quarter. 154 funds in all.

Jun '25
Dec '25
Jun '26
Largest holders overall

From 13F filings for the quarter ended 30 June 2026.

Big holders and activists

4 investors own more than 5%.

  • Third Rock Ventures V, L.P.
    Passive investor
    at least 14.0%0.0 pts
    (filed with 5 related holders)
    Since 31 March 2025
  • at least 11.8%
    (filed with 3 related holders)
    Since 12 August 2026
  • 9.8%−0.6 pts
    Since 30 June 2026
  • BVF PARTNERS L P/IL
    Passive investor
    at least 3.8%−6.1 pts
    (filed with 9 related holders)
    Since 31 December 2025

From Schedule 13D and 13G filings: anyone owning more than 5% must file one.

What insiders did

No insider bought shares on the open market in the last 12 months. 4 sold $69m, $5m of it under preset trading plans.

  • Long Daniel D.
    SVP, Drug Discovery
    Sold
    under a preset trading plan
    Date
    1 September 2026
    Shares
    3,333
    Price
    $37.83
    Value
    $126,078
  • RA CAPITAL MANAGEMENT, L.P.
    Director
    Sold
    Date
    12 August 2026
    Shares
    1,493,000
    Price
    $42.50
    Value
    $63m
  • Bhatt Elizabeth
    President and COO
    Sold
    under a preset trading plan
    Date
    11 August 2026
    Shares
    25,000
    Price
    $44.00
    Value
    $1m
  • Long Daniel D.
    SVP, Drug Discovery
    Sold
    under a preset trading plan
    Date
    3 August 2026
    Shares
    3,334
    Price
    $34.47
    Value
    $114,920
  • Bhatt Elizabeth
    President and COO
    Sold
    under a preset trading plan
    Date
    15 July 2026
    Shares
    4,000
    Price
    $33.99
    Value
    $135,974
  • Long Daniel D.
    SVP, Drug Discovery
    Sold
    under a preset trading plan
    Date
    1 July 2026
    Shares
    3,333
    Price
    $34.36
    Value
    $114,528
  • Shaikhly Samira
    Chief People Officer
    Sold
    under a preset trading plan
    Date
    29 June 2026
    Shares
    2,178
    Price
    $35.18
    Value
    $76,622
  • Long Daniel D.
    SVP, Drug Discovery
    Sold
    under a preset trading plan
    Date
    22 June 2026
    Shares
    15,000
    Price
    $35.51
    Value
    $532,590
  • Shaikhly Samira
    Chief People Officer
    Sold
    under a preset trading plan
    Date
    12 June 2026
    Shares
    6,250
    Price
    $35.08
    Value
    $219,250
  • Shaikhly Samira
    Chief People Officer
    Sold
    under a preset trading plan
    Date
    1 June 2026
    Shares
    5,935
    Price
    $28.92
    Value
    $171,665

From Form 4 filings: insiders must report trades in their own company's shares within two days.

What could go wrong

Cheap for a reason is the question the numbers cannot answer.

Whether the price already reflects the risks is what the deep dive is for.

The deep dive

Everything above is arithmetic on public filings. The deep dive reads the last ten years of annual reports, the proxy statements, and the earnings calls, then argues the case the way Buffett, Klarman, and Hohn would, and checks every claim against the source.

  • What the business is worth, as a range, and the margin of safety at today’s price
  • Prices to start buying, buy, and buy hard
  • The three things that would make this a mistake
  • Every number footnoted to the filing it came from
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What a finished deep dive looks like

Not advice. Numbers on this page come from SEC filings and are updated each night; prices are updated again after the US market closes. The five-year figures are rounded.