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sellWeak10b5-1 plan

Sukumar Nagendran sold $646k of TSHA

President and Head of R&D at Taysha Gene Therapies, Inc.. 200,000 shares at an average of $3.23, traded Sep 10, 2025, filed Sep 12, 2025.

Warning score
10
Value
$646k
200,000 shares
Holdings after
1,006,439
-17% from before
From 52-week low
-
no price yet
From 52-week high
-
no price yet

Score components

  • Role
    President
    +20
  • Trade size
    $646k at market
    +20
  • Share of holdings sold
    Sold 17% of holdings
    +5
  • Cluster
    No other insider selling within 14 days
    0
  • 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.

This signal so far: 1m +59.0%, 3m +88.6%, 6m +46.3%.

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.

TSHAOct 12, 2026 · close 4.14
Since filing Sep 12, 2025: +34.9%SPY +20.0% · excess +14.9%

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 0001415889-25-024369, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Sep 10, 2025MOption exercise
Common Stock10b5-1
+41,150$0.70$29k1,206,439Sep 12, 2025
Sep 10, 2025SOpen-market sale
Common Stock10b5-1
-200,000$3.23$646k1,006,439Sep 12, 2025
Sep 10, 2025MOption exercise
Employee Stock Option (right to buy)derivative10b5-1
-41,150$0.00$0292,855Sep 12, 2025

Related signals

Other insiders at Taysha Gene Therapies, Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
30Weak
TSHAsell10b5-1
Taysha Gene Therapies, Inc.
Sukumar Nagendran
President and Head of R&D
$1.2M
200,000 shares
-18%
13Weak
TSHAsell10b5-1
Taysha Gene Therapies, Inc.
Sukumar Nagendran
President and Head of R&D
$892k
200,000 shares
-15%
37Weak
TSHAsell 3
Taysha Gene Therapies, Inc.
Kamran Alam
CHIEF FINANCIAL OFFICER
$7,481
1,655 shares
-0%
55Moderate
TSHAsell 3
Taysha Gene Therapies, Inc.
Kamran Alam
CHIEF FINANCIAL OFFICER
$485k
102,817 shares
-7%
54Moderate
TSHAsell 3
Taysha Gene Therapies, Inc.
Sukumar Nagendran
President and Head of R&D
$547k
116,050 shares
-8%
63Notable
TSHAsell 3
Taysha Gene Therapies, Inc.
Sean P. Nolan
Chief Executive Officer
$840k
178,101 shares
-6%
29Weak
TSHAsell 310b5-1
Taysha Gene Therapies, Inc.
Sukumar Nagendran
President and Head of R&D
$942k
200,000 shares
-17%
40Moderate
TSHAsell
Taysha Gene Therapies, Inc.
Sukumar Nagendran
President and Head of R&D
$1.7M
370,172 shares
-33%
41Moderate
TSHAsell 2
Taysha Gene Therapies, Inc.
Kamran Alam
CHIEF FINANCIAL OFFICER
$155k
54,491 shares
-4%
39Weak
TSHAsell 2
Taysha Gene Therapies, Inc.
Sukumar Nagendran
President and Head of R&D
$163k
57,054 shares
-5%

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.

Sukumar Nagendran sold $646k of TSHA | InsiderTell