Michael Stuart Klein
CIK 1327392 · See Remarks · last filed 2026-07-02
"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.
MPLN.WS 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
450 LEXINGTON AVENUE
NEW YORK, NY 10017
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| SKIL | Director | 217,320 | $4.75 | $1.03M | $0 | 5 | 2026-07-02 |
| Claritev Corp (MPLN) Delisted | Director | 219,824 | $23.15 | $5.09M | $0 | 3 | 2026-05-01 |
| CXIIU | See Remarks | 350,000 | $10.46 | $3.66M | $10.50M | 1 | 2026-04-29 |
| OKLO | Director | 150,000 | $25.25 | $3.79M | -$12.17M | 2 | 2025-09-24 |
| Skillsoft Corp. (SKIL.WS) Delisted | Director | 3,616,709 | $0.01 | $23.5K | $0 | 5 | 2023-07-24 |
| Claritev Corp (MPLN.WS) Delisted | Director | 22,994,079 | $0.00 | $69.0K | $14.79M | 7 | 2023-04-28 |
| Oklo Inc. (ALCC) Delisted | Chairman | 1,435,500 | $18.23 | $26.17M | $0 | 1 | 2021-07-14 |
| Churchill Capital Corp V (CCV.U) Delisted | 10%+ Owner | — | $10.38 | — | $0 | 1 | 2020-12-22 |
| Hall of Fame Resort & Entertainment Co (HOFVW) Delisted | Director | 1,078,984 | $0.00 | $1.9K | -$1.10M | 2 | 2020-07-24 |
| IHS | Director | 12,316 | $8.46 | $104.2K | $0 | 6 | 2012-12-04 |
| C | Co-CEO Citi Markets & Banking | 129,560 | $122.64 | $15.89M | $0 | 4 | 2008-01-24 |
Recent Filings · Page 3 of 4
37 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2020-12-28 | Claritev Corp (MPLN.WS) Delisted | Grant (A) | +7,293 | $0 | EDGAR |
| 2020-12-22 | Churchill Capital Corp V (CCV.U) Delisted | Other (J) | — | $0 | EDGAR |
| 2020-11-17 | Claritev Corp (MPLN.WS) Delisted | Buy (P) | +700,000 | $4.93M | EDGAR |
| 2020-11-16 | Claritev Corp (MPLN.WS) Delisted | Buy (P) | +700,000 | $4.98M | EDGAR |
| 2020-11-13 | Claritev Corp (MPLN.WS) Delisted | Buy (P) | +741,000 | $4.89M | EDGAR |
| 2020-07-24 | Hall of Fame Resort & Entertainment Co (HOFVW) Delisted | Sell (S) | −90,287 | -$1.10M | EDGAR |
| 2020-07-07 | Hall of Fame Resort & Entertainment Co (HOFVW) Delisted | Grant (A) | +1,588,653 | $0 | EDGAR |
| 2012-12-04 | IHS | Grant (A) | +1,621 | $0 | EDGAR |
| 2011-12-05 | IHS | Grant (A) | +1,699 | $0 | EDGAR |
| 2010-12-03 | IHS | Grant (A) | +2,062 | $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.