Is Amprius Stock a Buy or Sell After Its Chief Technology Officer Dumped Nearly 40,000 Shares?

1 hour ago 1

Robert Izquierdo, The Motley Fool

Sun, February 8, 2026 astatine 2:52 PM CST 4 min read

On Jan. 28, 2026, Dr. Constantin Ionel Stefan, Chief Technology Officer astatine Amprius Technologies (NYSE:AMPX), exercised options and instantly sold 39,690 shares of communal banal successful an open-market derivative transaction, arsenic disclosed successful a SEC Form 4 filing.

Metric

Value

Shares sold (direct)

39,690

Transaction value

$476,351

Post-transaction shares (direct)

748,696

Post-transaction worth (direct ownership)

$9.0 million

Transaction worth based connected SEC Form 4 weighted mean acquisition terms ($12.00); post-transaction worth based connected Jan. 28, 2026 marketplace adjacent (price not specified successful SEC Form 4 oregon earthy information sources).

  • How does the standard of this transaction comparison to Dr. Stefan’s anterior merchantability activity?
    The 39,690 shares sold successful this lawsuit are good supra Dr. Stefan’s humanities median sell-only transaction size of 14,276 shares, and besides transcend the caller play median merchantability size of 32,357 shares.

  • What does the 5.03% simplification successful nonstop holdings connote astir insider capacity?
    The simplification reflects a important shrinkage of Dr. Stefan’s disposable holding base, with nonstop shares present little than fractional of wherever they stood astatine the commencement of the astir caller period, indicating the existent transaction size is bounded by remaining capableness alternatively than a alteration successful selling cadence.

  • Was this transaction motivated by nonstop marketplace merchantability oregon derivative mechanics?
    This was exclusively a derivative lawsuit involving the workout of 39,690 banal options, with each resulting shares instantly sold connected the unfastened market.

  • How does the timing subordinate to caller terms show and 10b5-1 planning?
    The transaction was executed nether a Rule 10b5-1 trading program adopted Sept. 11, 2025, during a play erstwhile Amprius's one-year banal terms had appreciated 358.75% arsenic of Jan. 28, 2026, perchance maximizing proceeds from enactment conversion.

Metric

Value

Market capitalization

$1.60 billion

Revenue (TTM)

$57.81 million

Net income (TTM)

($31.78 million)

1-year terms change

358.75%

* 1-year show calculated arsenic of Jan. 28, 2026.

  • Amprius Technologies manufactures silicon nanowire anode lithium-ion batteries, serving the aerospace, defense, and electrical conveyance sectors.

  • The institution generates gross done the merchantability of precocious artillery solutions tailored to high-performance and specialized applications.

  • Primary customers see organizations successful the aerospace, defense, and electrical mobility industries seeking next-generation vigor retention technologies.

Amprius operates astatine the intersection of precocious materials and vigor storage, leveraging proprietary silicon nanowire anode exertion to present high-performance lithium-ion batteries. The company’s absorption connected demanding end-markets, specified arsenic aerospace and electrical vehicles, positions it to payment from the accelerating adoption of electrification and lightweight vigor solutions.


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