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EcoR1 Capital, LLC bought $1.1M of ANAB

director, owner at ANAPTYSBIO, INC. 85,098 shares at an average of $12.92, traded Dec 30, 2024, filed Jan 2, 2025.

Conviction score
58
Value
$1.1M
85,098 shares
Holdings after
7,880,094
+1% from before
From 52-week low
+1%
low $8.69, close $8.81
From 52-week high
-67%
high $26.89, as of Dec 30, 2024

Score components

  • Role
    Director
    +15
  • Trade size
    $1.1M at market
    +25
  • Relative to holdings
    Holdings up 1.1%
    0
  • Price context
    1% above the 52-week low; 67% below the 52-week high
    +18
  • Cluster
    No other insider buying within 14 days
    0
  • Repeat buying
    First buy in 90 days
    0
  • Track record
    Too few past buys to judge (0 with prices)
    0

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.

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.

ANABOct 9, 2026 · close 45.95
Since filing Jan 2, 2025: +415.9%SPY +35.8% · excess +380.1%

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 0000935836-25-000008, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Dec 30, 2024POpen-market purchase
Common Stockindirect: See Note
+65,184$12.92$842k7,860,180Jan 2, 2025
Dec 31, 2024POpen-market purchase
Common Stockindirect: See Note
+13,268$12.93$172k7,873,448Jan 2, 2025
Jan 2, 2025POpen-market purchase
Common Stockindirect: See Note
+6,646$12.95$86k7,880,094Jan 2, 2025

Related signals

Other insiders at ANAPTYSBIO, INC and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
3Weak
ANABsell10b5-1
ANAPTYSBIO, INC
Hollings Renton
director
$249k
5,000 shares
-31%
21Weak
ANABsell 210b5-1
ANAPTYSBIO, INC
Hollings Renton
director
$72k
3,015 shares
-38%
21Weak
ANABsell 210b5-1
ANAPTYSBIO, INC
Dennis M Fenton
director
$72k
3,015 shares
-38%
13Weak
ANABsell10b5-1
ANAPTYSBIO, INC
Hollings Renton
director
$250k
10,000 shares
-84%

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.

EcoR1 Capital, LLC bought $1.1M of ANAB | InsiderTell