Transaction · 0001645326-26-000012

Zhou Rong

Zhou Rong, SE, PC, reported an open-market or private sale at Amphastar Pharmaceuticals, Inc. involving 3187.000000 shares for an estimated $75305.94. Reported holdings after the transaction were 169203.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

Open-market sellSEC transaction code SSE, PC
AMPHAmphastar Pharmaceuticals, Inc.
Trade date
Sep 02, 2026
Filing date
Sep 03, 2026
View on SEC Insider profile
Estimated value-$75.3kShares × reported price
Shares traded3.18k$23.63 per share
Holdings after169kDirect
% of reported position traded1.85%This security and ownership context
How reported position traded is calculated

Shares sold ÷ (holdings after + shares sold). Estimated position before: 172,390 shares.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

AMPH price since this filing

Daily closing prices, with the filing date and available return windows
AMPH · Daily closing priceLoading daily prices…
Filing dateReturn windows appear as prices become available.
Pre-filing1mo ago1w ago1d ago
Returns since7d30d90d180d1y

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Sell
Code S
Identifier
0001645326-26-000012
Common Stock
Transaction date
Sep 02, 2026
Filed Sep 03, 2026, 11:42 PM · 1d delay
Shares
3,187 sh
$23.63 per share
Estimated value
-$75.3k
Computed from shares × price
Holdings after
169,203 sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Direct Ownership
Filing-only score

+10 points

Compact filing score computed from stored Form 4 facts. Version v1.

Positive filing signal

This filing has a modest positive filing-only score. Treat it as a useful flag for review, not as a buy signal.

How this score is calculated
  • direct_ownership+6 points

    direct_or_indirect_ownership = D

    Direct ownership reports the insider's personal stake.
  • timely_filing+4 points

    reporting_delay_days = 1

    Filing reported within two business days of the transaction.
Read the scoring methodology

Signed filing-only points, not a probability or expected return. Version v1.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

SENIOR EVP, PRODUCTION CENTER

Officer YesDirector No10% NoOther No
Footnotes & amended
  1. F1

    The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.62 to $23.69, inclusive. The reporting person undertakes to provi…

  2. F2

    Includes 836 shares acquired on May 31, 2026 under the Issuer's 2014 Employee Stock Purchase Plan.

  3. F3

    The shares are held of record by the Zhou Family Trust for which the reporting person serves as a trustee.

  4. F4

    The shares are held of record by the reporting person's spouse.

Original filing · 0001645326-26-000012
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