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SEC Form 4 research

CERADYNE INC insider transactions

Inspect CERADYNE INC's public SEC insider acquisitions and sales, reporting owners and source receipts.

As of 2026-10-15T08:02:39.132Z

Issuer CIK
0000018937
Reporting owners
22
Officers and directors
14
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What is a Form 4?

Animation: what a Form 4 is, shown with one real example. Sonic Automotive (SAH) reporting owner Paul P. Rusnak bought 13,701 shares at $59.78 on Wednesday, October 7, 2026, transaction code P, an open-market purchase (S is a sale and A is an award from the company). A timeline marks the SEC's two-business-day filing deadline, which ends Friday, October 9. The SEC accepted the Form 4 at 4:33:21 PM ET on October 9, and NexusTrade treats it as public one minute later, at 4:34:21 PM ET. A lamp for NexusTrade's InsiderTrades indicator stays off from the trade date until that moment, then counts one purchase worth 13,701 × $59.78 = $819,045.78.
In this example the shares were bought on Oct 7, 2026, and NexusTrade's InsiderTrades indicator can count the purchase starting at 4:34:21 PM ET on Oct 9, one minute after the SEC accepted the Form 4.

A Form 4 is the SEC filing a company insider, such as an officer, director or 10% owner, uses to report a trade in the company's stock, generally within two business days. The animation follows one real filing as an example: Paul P. Rusnak's purchase of Sonic Automotive (SAH) shares on October 7, 2026.

The same reading applies to every row on this page. The trade date is when the shares changed hands. The available date is when NexusTrade treats the filing as public, and a NexusTrade InsiderTrades indicator counts a purchase (code P) or sale (code S) only from that moment. Code A awards are not counted as purchases.

Recent insider disclosures

This table includes purchases, sales and awards in the public filing record. Awards and open-market purchases are distinct transaction codes. For historical research, use the public availability date to determine when the transaction was knowable.

Read code P as a purchase, S as a sale and A as an award. An award is an acquisition, but it is not an open-market purchase. Open the filing receipt to check the transaction details.

Show the table · 0 rows, 7 columns

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Most recent 90-day source activity, up to 50 rows. No rows means no matching recent records, not no historical activity.

Officers and directors in the directory

Show the table · 16 rows, 3 columns

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ALLIEGRO RICHARD A000121688226
EDELSTEIN FRANK000119576118
GERK ALVIN PHILLIP00013287032
Hartl Peter00013093973
JUENGLING THOMAS R00014221311
KERTSON RICHARD A00012481831
King Marc A00013093984
Kraft Michael Anthony000132010916
LaCourse William C00013655009
LOCKHART BRUCE000126864549
LOHR MILTON L000121688598
MORRIS KENNETH R00013709684
MOSKOWITZ JOEL PHILIP0001216886120
PELLIZZON JERROLD J000121688730
REED DAVID P000121688814
WALDAL JEFFREY J000126864344
ALLIEGRO RICHARD A ↗EDELSTEIN FRANK ↗GERK ALVIN PHILLIP ↗Hartl Peter ↗JUENGLING THOMAS R ↗KERTSON RICHARD A ↗King Marc A ↗Kraft Michael Anthony ↗LaCourse William C ↗LOCKHART BRUCE ↗LOHR MILTON L ↗MORRIS KENNETH R ↗MOSKOWITZ JOEL PHILIP ↗PELLIZZON JERROLD J ↗REED DAVID P ↗WALDAL JEFFREY J ↗

Which transactions qualify for the company tracker

The company strategy uses verified officers and directors with qualifying acquisitions at this issuer. Other reporting owners may appear in source records without becoming strategy signals.

Strategy eligibility is held while filing coverage is unresolved.

Historical follower simulations are separate from these source transactions. They do not establish live trading results.