buyNotable

Charles Cherington bought $2.0M of ERNA

owner at Eterna Therapeutics Inc.. 4,000,000 shares at an average of $0.50, traded Feb 10, 2026, filed Feb 17, 2026.

Conviction score

Value

$2.0M

4,000,000 shares

Holdings after

6,779,440

+144% from before

From 52-week low

low $7.75, close $7.75

From 52-week high

-94%

high $131.25, as of Feb 10, 2026

Score components

Role
10% owner
+12
Trade size
$2.0M at market
+25
Relative to holdings
Holdings up 144%
+10
Price context
0% above the 52-week low; 94% 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
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 -18.2%, 3m +38.8%, 6m -48.5%.

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.

ERNAOct 12, 2026 · close 2.21

Since filing Feb 17, 2026: -73.2%SPY +14.8% · excess -88.1%

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 0001104659-26-016680, as filed. Open on EDGAR

Date	Transaction	Shares	Price	Value	Holdings after	Filed
Feb 10, 2026	POpen-market purchase Common Stock	+4,000,000	$0.50	$2.0M	6,779,440	Feb 17, 2026
Feb 10, 2026	POpen-market purchase Warrants to Purchase Common Stockderivative	+4,000,000	-	-	4,000,000	Feb 17, 2026

Related signals

Other insiders at Eterna Therapeutics Inc. and this insider’s other filings.

Score	Company	Insider	Value	Holdings	Filed
47Moderate	ERNAbuy Eterna Therapeutics Inc.	Charles Cherington owner	$2.2M 21,241,163 shares	+104%	Jun 11, 2025
29Weak	ERNAbuy Eterna Therapeutics Inc.	Charles Cherington owner	$394k 3,768,397 shares	+23%	Apr 4, 2025

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.