Mark R Ciarfella
CIK 1504654 · EVP - OPERATIONS · last filed 2026-03-09
"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.
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Disclosed Exposure
$7.43M
Companies
1
Total Filings
59
Lifetime Open-Market Net
-$52.15M
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 |
|---|---|---|---|---|---|---|---|
| SBAC | EVP - OPERATIONS | 40,683 | $182.70 | $7.43M | -$52.15M | 59 | 2026-03-09 |
Recent Filings · Page 5 of 6
59 filingsInsider 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 |
|---|---|---|---|---|---|
| 2017-05-08 | SBAC | Mixed | — | -$507.5K | EDGAR |
| 2017-03-07 | SBAC | Mixed | +1,982 | -$617.4K | EDGAR |
| 2016-03-17 | SBAC | Mixed | — | -$189.5K | EDGAR |
| 2016-03-08 | SBAC | Mixed | +2,276 | -$83.2K | EDGAR |
| 2015-06-19 | SBAC | Mixed | — | -$1.03M | EDGAR |
| 2015-03-06 | SBAC | Mixed | +2,341 | -$110.3K | EDGAR |
| 2014-07-11 | SBAC | Mixed | — | -$183.1K | EDGAR |
| 2014-03-13 | SBAC | Mixed | — | -$405.4K | EDGAR |
| 2014-03-06 | SBAC | Mixed | +1,862 | -$297.5K | EDGAR |
| 2013-05-03 | SBAC | Mixed | — | -$401.4K | EDGAR |
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.
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.