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sellWeak cluster of 210b5-1 plan

Daniel D. Long sold $533k of SEPN

SVP, Drug Discovery at Septerna, Inc.. 15,000 shares at an average of $35.51, traded Jun 22, 2026, filed Jun 24, 2026.

Warning score
11
Value
$533k
15,000 shares
Holdings after
96,412
-13% from before
From 52-week low
+232%
low $10.51, close $34.85
From 52-week high
-4%
high $36.17, as of Jun 22, 2026

Score components

  • Role
    Officer
    +15
  • Trade size
    $533k at market
    +18
  • Share of holdings sold
    Sold 13% of holdings
    +5
  • Cluster
    2 insiders selling within 14 days
    +8
  • Exercise and sell
    Shares came from an option exercise in the same filing
    -15
  • 10b5-1 plan
    Pre-scheduled under a 10b5-1 plan
    -20

What happened after comparable sells

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

SEPNOct 12, 2026 · close 37.56
Since filing Jun 24, 2026: +4.2%SPY +6.4% · excess -2.2%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0001193125-26-281461, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Jun 22, 2026MOption exercise
Common Stock10b5-1
+10,529$2.76$29k106,941Jun 24, 2026
Jun 22, 2026MOption exercise
Common Stock10b5-1
+4,471$11.70$52k111,412Jun 24, 2026
Jun 22, 2026SOpen-market sale
Common Stock10b5-1
-8,000$35.10$281k103,412Jun 24, 2026
Jun 22, 2026SOpen-market sale
Common Stock10b5-1
-7,000$35.97$252k96,412Jun 24, 2026
Jun 22, 2026MOption exercise
Stock Option (Right to Buy)derivative10b5-1
-10,529$0.00$010,376Jun 24, 2026
Jun 22, 2026MOption exercise
Stock Option (Right to Buy)derivative10b5-1
-4,471$0.00$025,529Jun 24, 2026

Related signals

Other insiders at Septerna, Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
0Weak
SEPNsell10b5-1
Septerna, Inc.
Daniel D. Long
SVP, Drug Discovery
$126k
3,333 shares
-3%
65Notable
SEPNsell 4
Septerna, Inc.
Ra Capital Management, L.p.
director, owner
$63M
1,493,000 shares
-27%
32Weak
SEPNsell 410b5-1
Septerna, Inc.
Third Rock Ventures V, L.P.
owner
$7.4M
147,200 shares
-2%
30Weak
SEPNsell 410b5-1
Septerna, Inc.
Elizabeth Bhatt
President and COO
$1.1M
25,000 shares
-13%
5Weak
SEPNsell 410b5-1
Septerna, Inc.
Daniel D. Long
SVP, Drug Discovery
$115k
3,334 shares
-3%
4Weak
SEPNsell 210b5-1
Septerna, Inc.
Elizabeth Bhatt
President and COO
$136k
4,000 shares
-2%
5Weak
SEPNsell 310b5-1
Septerna, Inc.
Daniel D. Long
SVP, Drug Discovery
$115k
3,333 shares
-3%
16Weak
SEPNsell 210b5-1
Septerna, Inc.
Samira Shaikhly
Chief People Officer
$77k
2,178 shares
-73%
20Weak
SEPNsell 210b5-1
Septerna, Inc.
Samira Shaikhly
Chief People Officer
$219k
6,250 shares
-89%
11Weak
SEPNsell10b5-1
Septerna, Inc.
Samira Shaikhly
Chief People Officer
$172k
5,935 shares
-88%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

Daniel D. Long sold $533k of SEPN | InsiderTell