Mainstem LLC
Mainstem LLC received $500 in federal prime contract obligations in the 12 months ending Oct 5, 2026, down 99.9% from $493K the year before, and $30.9M since FY2022. Its largest customer is the Department of Defense.
Contractor details
- Unique Entity ID (UEI)
- SXHHGF88NPK4
- CAGE code
- 63EE4
- Doing business as
- Blacklynx Services
- Headquarters
- Rockville, MD
- Business size
- Other Than Small Business
- Parent company
- Blacklynx Inc (UEI LDTCPT1T6AC5)
As recorded on this UEI's most recent prime contract action in USAspending.gov. Confirm current registration and certifications in SAM.gov.
Obligations by fiscal year
Net prime contract obligations by federal fiscal year.
Top agencies
Funding agencies ranked by obligations since FY2022.
| Funding agency | Latest 12 mo | Since FY2022 |
|---|---|---|
| Department of Defense | $500 | $30.9M |
Top NAICS codes
Industry codes agencies recorded on this contractor's awards, since FY2022.
What it sells
Product and service codes (PSC) on this contractor's awards, since FY2022.
| PSC | Description | Since FY2022 |
|---|---|---|
| R425 | Support- professional: Engineering/Technical | $30.9M |
| AC13 | National Defense R&D services; Department of Defense - military; Experimental Development | $500 |
Recent awards
This contractor's newest prime contract awards, most recent first.
| Award | Agency | Obligated | Awarded |
|---|---|---|---|
| HQ085926FF036 | Department of Defense SCALABLE HOMELAND INNOVATIVE ENTERPRISE LAYERED DEFENSE (SHIELD) INITIAL ORDER. | $500 | Dec 5, 2025 |
| FA714623F0053 | Department of Defense HULKA II | $564K | Sep 27, 2023 |
| FA714623F0018 | Department of Defense NEW TASK ORDER | $3.4M | May 3, 2023 |
| FA714623F0005 | Department of Defense CABIS - SPACE STACK | $1.4M | Nov 15, 2022 |
| FA714623F0004 | Department of Defense C3PO SUPPORT | $2.5M | Oct 25, 2022 |
| FA714622FB033 | Department of Defense SCAMPI II | $5.0M | Aug 2, 2022 |
| FA714622FB025 | Department of Defense CABIS PROVIDENCE AWARD | $1.6M | Jun 1, 2022 |
| FA714622FB024 | Department of Defense TASK ORDER AWARD | $2.0M | May 25, 2022 |
Prime contracts (award types A–D) from USAspending.gov through Oct 5, 2026. Subcontracts are not included. Net obligations include deobligations and corrections.
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