Mark G Barberio
CIK 1631948 · last filed 2026-05-18
Mark G Barberio is a corporate insider who has filed 35 SEC Form 4 insider transactions across 5 companies since 2015. The most recent filing shows the insider was granted $200.1K of EXR on May 18, 2026. Across all open-market trades the lifetime net is +$650.0K, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $3.6M across reported positions. 6 SEC filings were submitted jointly with Extra Space Storage Inc.
"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.
LSI 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
WILLIAMSVILLE, NY 14221
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| EXR | Director | 17,291 | $161.04 | $2.78M | $0 | 5 | 2026-05-18 |
| ROCK | Director | 18,403 | $43.58 | $802.0K | $102.5K | 11 | 2026-05-08 |
| LIFE STORAGE, INC. (LSI) Delisted | Director | 0 | $133.10 | $0 | $335.5K | 13 | 2023-07-20 |
| Endo International plc (ENDP) Delisted | Director | 38,187 | $0.29 | $11.2K | $0 | 2 | 2021-06-15 |
| SSS | Director | 1,115 | $22.36 | $24.9K | $212.1K | 4 | 2016-08-10 |
Recent Filings
35 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-18 | EXR | Grant (A) | +1,407 | $200.1K | EDGAR |
| 2026-05-08 | ROCK | Grant (A) | +3,059 | $115.0K | EDGAR |
| 2025-05-23 | EXR | Grant (A) | +1,375 | $199.9K | EDGAR |
| 2025-05-02 | ROCK | Grant (A) | +2,172 | $115.0K | EDGAR |
| 2024-05-28 | EXR | Grant (A) | +1,402 | $200.0K | EDGAR |
| 2024-05-02 | ROCK | Grant (A) | +1,670 | $115.0K | EDGAR |
| 2023-12-18 | EXR | Gift (G) | — | $0 | EDGAR |
| 2023-11-13 | ROCK | Gift (G) | −2,700 | $0 | EDGAR |
| 2023-07-21 | EXR | Grant (A) | +21,163 | $0 | EDGAR |
| 2023-07-20 | LIFE STORAGE, INC. (LSI) Delisted | Disp (D) | −23,647 | $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.