Thomas A South
CIK 1751051 · Executive Vice President · last filed 2026-05-26
"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
$1.83M
Companies
2
Total Filings
40
Lifetime Open-Market Net
-$2.10M
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 |
|---|---|---|---|---|---|---|---|
| NTRSO | Executive Vice President | 99,001 | $18.46 | $1.83M | -$2.00M | 34 | 2026-05-26 |
| NORTHERN TRUST CORP (NTRSP) Delisted | Executive Vice President | 18,289 | — | — | -$98.5K | 3 | 2019-09-16 |
Recent Filings · Page 4 of 4
40 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 |
|---|---|---|---|---|---|
| 2021-03-03 | NTRSO | Tax (F) | −1,261 | -$124.1K | EDGAR |
| 2021-02-24 | NTRSO | Tax (F) | −579 | -$56.1K | EDGAR |
| 2021-02-19 | NTRSO | Grant (A) | +6,554 | $0 | EDGAR |
| 2020-12-16 | NTRSO | Gift (G) | −300 | $0 | EDGAR |
| 2020-03-03 | NTRSO | Tax (F) | −826 | -$71.6K | EDGAR |
| 2020-02-25 | NTRSO | Tax (F) | −541 | -$54.8K | EDGAR |
| 2020-02-19 | NTRSO | Mixed | +5,043 | -$79.4K | EDGAR |
| 2019-09-16 | NORTHERN TRUST CORP (NTRSP) Delisted | Sell (S) | −1,000 | -$98.5K | EDGAR |
| 2019-03-05 | NORTHERN TRUST CORP (NTRSP) Delisted | Tax (F) | −437 | -$40.9K | EDGAR |
| 2019-02-21 | NORTHERN TRUST CORP (NTRSP) Delisted | Mixed | +2,129 | -$116.9K | EDGAR |
Showing 31–40 of 40
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Page 4 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.
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.