Joan M Lammtennant
CIK 1208239 · last filed 2026-10-05
Joan M Lammtennant is a corporate insider who has filed 79 SEC Form 4 insider transactions across 7 companies since 2007. The most recent filing, for OSG, was dated Oct 5, 2026. Across all open-market trades the lifetime net is −$741.1K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $12.3M across reported positions. 9 SEC filings were submitted jointly with Equitable Holdings, 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.
SIGI 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
BRANCHVILLE, NJ 07890
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| OSG | Director | — | $4.80 | — | $0 | 4 | 2026-10-05 |
| AB | Director | 24,875 | $35.28 | $877.6K | $0 | 5 | 2026-05-22 |
| EQH | Director | 54,788 | $53.58 | $2.94M | $0 | 8 | 2026-05-21 |
| OCTAVE SPECIALTY GROUP INC (AMBC) Delisted | Director | 106,990 | $8.85 | $946.9K | $0 | 11 | 2025-10-02 |
| OCTAVE SPECIALTY GROUP INC (AMBC.WS) Delisted | Director | — | $0.01 | — | $0 | 10 | 2023-04-04 |
| OCTAVE SPECIALTY GROUP INC (AMBCW) Delisted | Director | — | — | — | $0 | 3 | 2019-05-01 |
| SIGI | Director | 86,118 | $98.79 | $8.51M | -$741.1K | 38 | 2014-12-09 |
Recent Filings
79 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-10-05 | OSG | Grant (A) | — | $0 | EDGAR |
| 2026-07-07 | OSG | Grant (A) | — | $0 | EDGAR |
| 2026-05-22 | AB | Grant (A) | +4,397 | $170.0K | EDGAR |
| 2026-05-21 | EQH | Grant (A) | +6,897 | $290.0K | EDGAR |
| 2026-04-02 | OSG | Grant (A) | — | $0 | EDGAR |
| 2026-01-05 | OSG | Grant (A) | — | $0 | EDGAR |
| 2025-10-02 | OCTAVE SPECIALTY GROUP INC (AMBC) Delisted | Grant (A) | — | $0 | EDGAR |
| 2025-09-30 | OCTAVE SPECIALTY GROUP INC (AMBC) Delisted | Conv (C) | +106,990 | $0 | EDGAR |
| 2025-07-01 | OCTAVE SPECIALTY GROUP INC (AMBC) Delisted | Grant (A) | — | $0 | EDGAR |
| 2025-05-23 | EQH | Grant (A) | +5,428 | $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.