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Theodore Blegen Insider Trading Activity
Every SEC Form 4 transaction reported by Theodore Blegen, sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud · Insider-trading data from SEC EDGAR
Latest filing:
Compiled automatically from SEC EDGAR Form 4 filings and refreshed daily. Figures count purchases (code P) and sales (code S) only — not grants, option exercises, or gifts. How this page is built. Not investment advice.
Quick Answer
Is Theodore Blegen buying or selling?
Theodore Blegen reported 0 open-market buys ($0) and 128 sells ($156.0M) across 128 Form 4 filings at 1 company — a net selling position of $156.0M.
Source: SEC EDGAR Form 4
What stands out
- All 128 of Theodore Blegen's Form 4 filings are for one company, MONOLITHIC POWER SYSTEMS INC (MPWR).
- The most recent Form 4 was accepted on Feb 10, 2026 (8 months ago).
- In the last 12 months: no open-market purchases and 5 sales ($37.5M).
- The largest open-market sale in the last 12 months was $25.4M of MONOLITHIC POWER SYSTEMS INC (MPWR) on Feb 10, 2026. SEC ↗
Key Statistics (as of Feb 10, 2026)
Total Form 4 filings
128
SEC EDGAR
Companies
1
Buys (0)
$0
Sells (128)
$156.0M
Insider sentiment
Net sellingNet insider flow of $156.0M in net selling, filed between Jan 30, 2018 – Feb 10, 2026.
Companies Theodore Blegen files for
| # | Company | Form 4 filings |
|---|---|---|
| 1 | MPWRMONOLITHIC POWER SYSTEMS INC | 128 |
Recent Theodore Blegen transactions
| Date | Ticker | Role | Type | Shares | Value | Filing |
|---|---|---|---|---|---|---|
| Feb 10, 2026 | MPWR | EVP and CFO | Sale | 21.7K | $25.4M | SEC ↗ |
| Feb 4, 2026 | MPWR | EVP and CFO | Sale | 3.0K | $3.4M | SEC ↗ |
| Jan 6, 2026 | MPWR | EVP and CFO | Sale | 3.0K | $2.8M | SEC ↗ |
| Dec 3, 2025 | MPWR | EVP and CFO | Sale | 3.0K | $2.7M | SEC ↗ |
| Nov 5, 2025 | MPWR | EVP and CFO | Sale | 3.0K | $3.1M | SEC ↗ |
| Oct 2, 2025 | MPWR | EVP and CFO | Sale | 3.0K | $2.7M | SEC ↗ |
| Sep 3, 2025 | MPWR | EVP and CFO | Sale | 3.0K | $2.4M | SEC ↗ |
| Aug 4, 2025 | MPWR | EVP and CFO | Sale | 3.0K | $2.3M | SEC ↗ |
| Jul 2, 2025 | MPWR | EVP and CFO | Sale | 6.0K | $4.5M | SEC ↗ |
| Feb 12, 2025 | MPWR | EVP and CFO | Sale | 532 | $381.5K | SEC ↗ |
| Dec 12, 2024 | MPWR | EVP and CFO | Sale | 2.5K | $1.5M | SEC ↗ |
| Nov 13, 2024 | MPWR | EVP and CFO | Sale | 734 | $561.6K | SEC ↗ |
| Nov 5, 2024 | MPWR | EVP and CFO | Sale | 2.5K | $1.9M | SEC ↗ |
| Oct 2, 2024 | MPWR | EVP and CFO | Sale | 2.5K | $2.3M | SEC ↗ |
| Sep 3, 2024 | MPWR | EVP and CFO | Sale | 2.5K | $2.3M | SEC ↗ |
| Aug 12, 2024 | MPWR | EVP and CFO | Sale | 728 | $566.7K | SEC ↗ |
| Aug 2, 2024 | MPWR | EVP and CFO | Sale | 2.5K | $2.1M | SEC ↗ |
| Jul 24, 2024 | MPWR | EVP and CFO | Sale | 2.6K | $2.1M | SEC ↗ |
| Jul 2, 2024 | MPWR | EVP and CFO | Sale | 2.5K | $2.0M | SEC ↗ |
| Jun 5, 2024 | MPWR | EVP and CFO | Sale | 2.5K | $1.8M | SEC ↗ |
| May 9, 2024 | MPWR | EVP and CFO | Sale | 737 | $508.5K | SEC ↗ |
| May 3, 2024 | MPWR | EVP and CFO | Sale | 2.5K | $1.7M | SEC ↗ |
| Apr 3, 2024 | MPWR | EVP & CFO | Sale | 2.5K | $1.7M | SEC ↗ |
| Mar 4, 2024 | MPWR | CFO | Sale | 2.5K | $1.8M | SEC ↗ |
| Feb 7, 2024 | MPWR | CFO | Sale | 867 | $555.7K | SEC ↗ |
Showing the 25 most recent filings of 128. Screen every filing.
Theodore Blegen insider trading FAQ
Is Theodore Blegen buying or selling?
Across 128 SEC Form 4 filings, Theodore Blegen reported 0 open-market purchases totaling $0 and 128 sales totaling $156.0M — a net selling position of $156.0M.
Which companies does Theodore Blegen file Form 4s for?
Theodore Blegen has reported insider transactions at 1 company, most often MONOLITHIC POWER SYSTEMS INC (MPWR).
How far back does Theodore Blegen's filing history go?
Trabud holds Theodore Blegen's SEC Form 4 filings from Jan 30, 2018 – Feb 10, 2026, sourced directly from SEC EDGAR.
Where does Trabud get Theodore Blegen's insider trading data?
Directly from SEC EDGAR Form 4 filings. Every transaction on this page is a real filing accepted by the SEC, updated as new filings arrive.
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