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SEC Form 4 research

Kronos Bio, Inc. insider transactions

Inspect Kronos Bio, Inc.'s public SEC insider acquisitions and sales, reporting owners and source receipts.

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

Issuer CIK
0001741830
Reporting owners
29
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.

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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 · 14 rows, 3 columns

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Ridloff Elena000177251823
DiMartino Jorge00018267327
Stampacchia Otello0001361712318
Al-Wakeel Yasir B.00016506913
BISCHOFBERGER NORBERT W0001190273259
De Backer Marianne000179781924
Dinsmore Christopher000182676611
Frisbee Allison00019957791
KNOBELMAN DEBORAH00019315091
Kosacz Barbara00017633162
Lin Charles Y00020098521
Loven Jakob000175364418
MARTIN JOHN C0001190578435
Olek Elizabeth A00014190664
Ridloff Elena ↗DiMartino Jorge ↗Stampacchia Otello ↗Al-Wakeel Yasir B. ↗BISCHOFBERGER NORBERT W ↗De Backer Marianne ↗Dinsmore Christopher ↗Frisbee Allison ↗KNOBELMAN DEBORAH ↗Kosacz Barbara ↗Lin Charles Y ↗Loven Jakob ↗MARTIN JOHN C ↗Olek Elizabeth A ↗

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.