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.
Filing timeSep 03
Trade dateSep 02, 2026
Filing · SECView on SEC
InsiderProfile

Price performance since filing

Close on the filing date, the pre-filing context, and the forward return at standard windows
Price at filing
—
Pre-filing
1mo ago1w ago1d ago
Returns since
7d30d90d180d1y

AMPH price since this filing

30 days of pre-filing context and vertical markers at the filing date plus 7d / 30d / 90d / 180d / 1y afterwards
AMPH since 2026-09-03Filed yesterday · 1 day of post-filing data
Loading…
Filing datePost-filing windows (7d, 30d, 90d, 180d, 1y)30 days of pre-filing context

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
3.18k sh
$2.36k per share
Estimated value
-$7.53M
Computed from shares × price
Holdings after
169k sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
Direct Ownership
+10score
Filing-only score

+10

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.

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
Related transactions

0 other filings

Same reporting owner
Recent company activity

0 recent txs

AMPH