Home

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 $3.2M 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.

Loading insider history…
Disclosed Exposure

$3.15M

Companies

5

Total Filings

35

Lifetime Open-Market Net

$650.0K

Filer Profile

Reported Address
19 WIK STREET
WILLIAMSVILLE, NY 14221
Related Filers
Extra Space Storage Inc. — 6 joint filings, latest 2026-05-18
Endo International plc — 3 joint filings, latest 2021-06-15
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
EXR Director 17,291 $136.71 $2.36M $0 5 2026-05-18
ROCK Director 18,403 $41.49 $763.5K $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 $23.15 $25.8K $212.1K 4 2016-08-10

Recent Filings

35 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
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
Showing 1–10 of 35
Page 1 of 4
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
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.