Zalevsky Jonathan
Chief R&D Officer
Zalevsky Jonathan has filed 10 SEC Form 4 filings (14 transaction rows) across 1 company, with disclosures dating back to 2025. 9 of those filings fall inside the rolling window. Most recent filing: Aug 20, 2026.
On the most recent filing, Zalevsky Jonathan is listed as Chief R&D Officer at NEKTAR THERAPEUTICS. Inside the rolling window, Zalevsky Jonathan reported no open-market purchases and 8 open-market sales totaling $1.0M in NKTR. The largest disclosed transaction in the window is a sale of 5,681 NKTR shares on Jun 30, 2026, worth $398K.
Companies traded
Other insiders at NKTR
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$1.0M
reported sales (SEC code S)
Companies
1
in the rolling window
| Source | |||||||
|---|---|---|---|---|---|---|---|
| NKTR | Chief R&D Officer | Sale | 186 | $13K | Aug 20 | SEC ↗ | |
| NKTR | Chief R&D Officer | Sale | 5,681 | $398K | Jul 2 | SEC ↗ | |
| NKTR | Chief R&D Officer | Sale | 5,538 | $336K | Jun 17 | SEC ↗ | |
| NKTR | Chief R&D Officer | Sale | 199 | $13K | May 21 | SEC ↗ | |
| NKTR | Chief R&D Officer | Sale | 180 | $13K | Feb 20 | SEC ↗ | |
| NKTR | Chief R&D Officer | Sale | 3,867 | $138K | Jan 22 | SEC ↗ | |
| NKTR | Chief R&D Officer | Sale | 1,157 | $63K | Nov 25 | SEC ↗ | |
| NKTR | Chief R&D Officer | Sale | 1,721 | $58K | Sep 8 | SEC ↗ |
Earlier trades
Open-market purchases and sales filed before the rolling 365-day window, kept from the original Form 4 filings.
| Date | Ticker | Type | Value |
|---|---|---|---|
| Sep 2, 2025 | NKTR | Sale | $15K |
Frequently asked questions
How many SEC Form 4 filings has Zalevsky Jonathan made?
Zalevsky Jonathan has filed 10 SEC Form 4 filings (14 transaction rows) across 1 company since 2025.
Which companies does Zalevsky Jonathan trade?
Zalevsky Jonathan has filed SEC Form 4 disclosures for 1 company, including NKTR.
When was Zalevsky Jonathan's most recent SEC Form 4 filing?
Zalevsky Jonathan's most recent SEC Form 4 filing on Tracefour is dated Aug 20, 2026.
What is Zalevsky Jonathan's job title?
On the most recent SEC Form 4 filings tracked by Tracefour, Zalevsky Jonathan is listed as Chief R&D Officer.
What is Zalevsky Jonathan's total buy and sell value in the current window?
Inside the rolling retention window, Zalevsky Jonathan bought $0 and sold $1.0M based on SEC Form 4 filings.
What was Zalevsky Jonathan's largest disclosed transaction?
The largest disclosed transaction in the current window is a sale of 5,681 NKTR shares on 2026-06-30, worth $398K, per SEC Form 4 filings.