Bank Branches › Closed and merged banks › Oklahoma › Landmark Bank Company, National Association
What happened to Landmark Bank Company, National Association?
Landmark Bank Company, National Association in Ardmore, OK (earlier called First State Bank and 4 other names) merged into Landmark Bank, National Association of Ada, OK on Aug 25, 2000. After 2 more changes of hands, what was Landmark Bank Company, National Association is today part of Simmons Bank (Pine Bluff, AR).
The chain, step by step
From the day it opened to the bank at the end of the chain today. Each step is one entry in the FDIC's record.
- 1929First State Bank opens in Ardmore, OK
- Oct 18, 1984renamed First National Bank of Johnston County
- Feb 25, 1987renamed First American National Bank
- Jan 1, 1988renamed The Bank of Southern Oklahoma, National Association and Trust Company
- Feb 13, 1992renamed The Bank of Southern Oklahoma, National Association
- Feb 21, 1997renamed Landmark Bank Company, National Association
- Aug 25, 2000MERGEDLandmark Bank Company, National Association merged into Landmark Bank, National Association of Ada, OK.FDIC certificate 12288 ends; its business continues under certificate 34498.
- Apr 24, 2009MERGEDLandmark Bank, National Association of Ada, OK merged into Landmark Bank, National Association of Columbia, MO.FDIC certificate 34498 ends; its business continues under certificate 4537.
- Feb 15, 2020MERGEDLandmark Bank, National Association (by then renamed Landmark Bank) of Columbia, MO merged into Simmons Bank of Pine Bluff, AR.FDIC certificate 4537 ends; its business continues under certificate 3890.
- TodayOPEN
Simmons BankMain office Pine Bluff, AR · FDIC certificate 3890 · 229 offices in 6 states on June 30, 2026Every Simmons Bank office → Website on file with the FDIC: www.simmonsbank.com
If you still have something from Landmark Bank Company, National Association
A lien that was never released
If a paid-off mortgage, home-equity line or car loan still shows Landmark Bank Company, National Association as lienholder, start with Simmons Bank. In a merger the surviving bank takes over the other bank's loans, so it is the bank to ask for a recordable lien release; if the loan was sold along the way, it can tell you to whom.
The FDIC says it cannot process lien releases for banks that merged or were acquired without government assistance, which is what the record shows here.
Record the release with the same county office that recorded the original mortgage or deed of trust.
An old account, passbook or CD
Ask Simmons Bank to search for the account under the name Landmark Bank Company, National Association. A passbook or certificate shows an account existed. It doesn't show the money is still there, and the OCC notes that federal rules require banks to keep most account records for five years.
Accounts nobody touches are eventually turned over to a state. The OCC puts the usual wait at three to five years with no activity, set by each state's law. Search the unclaimed-property program of the state of the owner's last known address on the bank's records, and any other state they lived in. It is free to search and to claim through a state's own site, and MissingMoney.com, an official site of the state administrators' association, searches most states at once.
A safe deposit box
Ask Simmons Bank which branch now holds boxes from the Landmark Bank Company, National Association office you used. The OCC says a box with no activity for three to five years (the period is set by state statute) is likely treated as dormant, and its contents may be turned over to the state's unclaimed-property program.
Box contents are not covered by FDIC insurance.
Not sure this is your bank?
Many banks shared a name. Match the city and the years above against your paperwork, or search again with the town.
Credit unions were never FDIC-insured and are not in this record; the NCUA credit union lookup covers those. Banks that closed before about 1970 are not in the FDIC's list either.
One caution: banks also sell single branches. If the office you used was sold to a different bank along the way, the account went with the branch, not with this chain. The office list below shows which bank each office reports under now.
This page is drawn from FDIC records and federal guidance. It is not legal advice, and BankBranches is not a bank or a government office. More detail: lien releases · old passbooks and CDs · safe deposit boxes · unclaimed money.
Where the guidance comes from ▾
Its offices in the FDIC deposit reports
7 offices filed under this charter in some year from 1994 on. 4 are still open as of June 30, 2026.
| Office | Now |
|---|---|
| 900 W Main StDurant, OK | OpenSimmons Bank |
| 128 PlazaMadill, OK | OpenSimmons Bank |
| 111 W Main StTishomingo, OK | OpenSimmons Bank |
| 2525 N Commerce StArdmore, OK | OpenSimmons Bank |
| 702 Highway 70 EastKingston, OK | No longer reported |
| Main Street And North Choctaw AvenueWapanucka, OK | No longer reported |
| 224 West Main StreetTishomingo, OK | No longer reported |
Banks folded into Landmark Bank Company, National Association
2 banks merged directly into this charter.
| Bank | Ended |
|---|---|
| The Madill Bank and Trust CompanyMadill, OK | Mar 20, 1987 |
| American National BankDurant, OK | Feb 25, 1987 |
Source: FDIC BankFind institution and history records, read Nov 15, 2026. The FDIC's list covers banks that ended in about 1970 or later. Look up certificate 12288 in the FDIC BankFind Suite to see the government's own entry. Corrections: me@byclaude.net.