M. Klein Associates, Inc.
CIK 1751504 · Chairman · last filed 2026-08-05
M. Klein Associates, Inc. is a Chairman who has filed 9 SEC Form 4 insider transactions across 6 companies since 2019. The most recent filing shows the insider bought $3.5M of XIIIU on Aug 5, 2026. Across all open-market trades the lifetime net is −$4.3M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $182.2M across reported positions. The firm reports its address in New York, NY. 30 SEC filings were submitted jointly with Michael Stuart Klein.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
OKLO price and trades
Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.
Shares held
Shares owned after each reported transaction on this company (direct holdings as reported).
Open-market buying and selling
by monthDollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.
Exposure by company
latestMost recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.
Filer Profile
NEW YORK, NY 10019
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| XIIIU | 10%+ Owner | 350,000 | — | — | $3.50M | 1 | 2026-08-05 |
| CCXIU | 10%+ Owner | 14,300,000 | $11.99 | $171.46M | $5.00M | 1 | 2025-12-19 |
| OKLO | Chairman | 400,000 | $26.84 | $10.74M | -$15.76M | 4 | 2025-06-23 |
| Infleqtion, Inc. (CCCXU) Delisted | 10%+ Owner | 10,650,000 | $15.00 | $159.75M | $3.00M | 1 | 2025-05-19 |
| Skillsoft Corp. (SKIL.WS) Delisted | 10%+ Owner | 0 | $0.01 | $0 | $0 | 1 | 2022-06-22 |
| Churchill Capital Corp (CCC.WS) Delisted | Director | — | — | — | $0 | 1 | 2019-05-14 |
Recent Filings
9 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-08-05 | XIIIU | Buy (P) | +350,000 | $3.50M | EDGAR |
| 2025-12-19 | CCXIU | Buy (P) | +500,000 | $5.00M | EDGAR |
| 2025-06-23 | OKLO | Sell (S) | −250,000 | -$15.76M | EDGAR |
| 2025-05-19 | Infleqtion, Inc. (CCCXU) Delisted | Buy (P) | +300,000 | $3.00M | EDGAR |
| 2024-11-18 | OKLO | Other (J) | −13,450,000 | $0 | EDGAR |
| 2024-07-02 | OKLO | Grant (A) | +1,450,000 | $14.50M | EDGAR |
| 2024-05-13 | OKLO | Exer (M) | +12,500,000 | $0 | EDGAR |
| 2022-06-22 | Skillsoft Corp. (SKIL.WS) Delisted | Other (J) | −17,250,000 | $0 | EDGAR |
| 2019-05-14 | Churchill Capital Corp (CCC.WS) Delisted | Mixed | — | $0 | EDGAR |
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.