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buyModerate cluster of 2

Third Rock Ventures V, L.P. bought $12M of SEPN

owner at Septerna, Inc.. 650,000 shares at an average of $18.00, traded Oct 28, 2024, filed Oct 28, 2024.

Conviction score
43
Value
$12M
650,000 shares
Holdings after
3,152,456
+11% from before
From 52-week low
-
no price yet
From 52-week high
-
no price yet

Score components

  • Role
    10% owner
    +12
  • Trade size
    $11.7M at market
    +25
  • Relative to holdings
    Holdings up 11%
    +3
  • Price context
    No price history yet
    0
  • Cluster
    2 insiders buying within 14 days
    +8
  • Repeat buying
    First buy in 90 days
    0
  • Track record
    Too few past buys to judge (0 with prices)
    0
  • Outside holder
    A 10% owner who is not an officer or director
    -5

What happened after comparable buys

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.

This signal so far: 1m +19.4%, 3m -22.1%, 6m -66.3%.

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 Oct 28, 2024: +81.0%SPY +37.1% · excess +44.0%

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 0000950170-24-117772, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Oct 28, 2024CConversion
Common Stock
+4,790,773$0.00$05,845,091Oct 28, 2024
Oct 28, 2024CConversion
Common Stockindirect: See Footnotes
+2,872,956$0.00$02,872,956Oct 28, 2024
Oct 28, 2024POpen-market purchase
Common Stock
+370,500$18.00$6.7M6,215,591Oct 28, 2024
Oct 28, 2024POpen-market purchase
Common Stockindirect: See Footnotes
+279,500$18.00$5.0M3,152,456Oct 28, 2024
Oct 28, 2024CConversion
Series A Preferred Stockderivative
-41,250,000$0.00$00Oct 28, 2024
Oct 28, 2024CConversion
Series B Preferred Stockderivativeindirect: See Footnotes
-24,737,017$0.00$00Oct 28, 2024

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%
11Weak
SEPNsell 210b5-1
Septerna, Inc.
Daniel D. Long
SVP, Drug Discovery
$533k
15,000 shares
-13%
20Weak
SEPNsell 210b5-1
Septerna, Inc.
Samira Shaikhly
Chief People Officer
$219k
6,250 shares
-89%

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.

Third Rock Ventures V, L.P. bought $12M of SEPN | InsiderTell