SI2 TECHNOLOGIES, INC

North Billerica, MA · Defense · Acquired by Antenna Research Associates (2022)

High-temperature conformal antenna arrays for hypersonic projectiles using advanced conductors and dielectrics

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Updated Oct 23, 2026 · si2technologies.com

Sector: Defense
Headquarters: North Billerica, MA
Total capital: $149M

Federal grants: $16M; 22 awards · 2014–2024; Rank in peer group#25 of 164
Private capital raised: None on recordNo Form D filings on SEC EDGAR. Some raises are not filed.
Federal contracts: $133M; 123 awards · Defense, Interior, General Services A; Rank in Defense#69 of 1442
Granted patents: 6; 2 pending · first 2017; Rank in peer group#29 of 164

Capital timeline

Latest events

Jun 2026Federal contractDefense · Contracts 13 Unit Order$2.1M
Apr 2026Federal contractDefense · Marines Toughbook Laptop Order$512K
Mar 2026Federal contractDefense · Global Broadcast Service Small Business Innovation Research OY1 Labor$525K
Feb 2026Federal contractDefense · Global Broadcast Service Small Business Innovation Research$4K
Jan 2026Federal contractDefense · Global Broadcast Service Small Business Innovation Research III Delivery Order 2 - Dual Enclave Special Study$44K
Dec 2025Federal contractDefense · Scalable Homeland Innovative Enterprise Layered Defense (shield) Initial Order.$500
Sep 2025Federal contractDefense · Global Broadcast Service Small Business Innovation Research Procurement Of 10 Units$1.5M

Show 138 earlier federal awards

Sep 2025Federal contractDefense · Global Broadcast Service Small Business Innovation Research$956K
Aug 2025Federal contractGeneral Services A · Gbs To 17 Novra S401 Modem$481K
Jul 2025Federal contractGeneral Services A · Gbs To 20 Navy$2.7M
Jun 2025Federal contractGeneral Services A · Gbs To 19 Usmc$773K
Jun 2025Federal contractGeneral Services A · Gbs To 18 Usmc. Global Broadcast Service (gbs) Portable Receive Suite (prs) Systems And Computer$2.3M
May 2025Federal contractGeneral Services A · Gbs To 16$520K
May 2025Federal contractDefense · Low Cost Sensors For Small Unmanned Vehicles$13.2M
Oct 2024Federal contractDefense · Affordable Wideband Scalable Front-end Electronics Supporting Multi-function Seekers$1.8M
Oct 2024Federal grantDefense · Phase II · Affordable Wideband Scalable Front-end Electronics Supporting Multi-function Seekers$1.8M
Sep 2024Federal contractGeneral Services A · Global Broadcast Service Small Business Innovation Research Phase III Task Order 15 For Equipment And Spare Parts.$4.9M
Aug 2024Federal contractGeneral Services A · Global Broadcast Service Small Business Innovation Research Task Order 14 Spare Parts.$731K
Jun 2024Federal contractDefense · Design Of Conformal Direct Write Smart Electromagnetic Skins$75K
May 2024Federal grantDefense · Phase I · Design Of Conformal Direct Write Smart Electromagnetic Skins$75K
Apr 2024Federal grantDefense · Phase II · SBIR Phase II Proposal F2D-10798 - Direct Write Frequency Selective Surfaces For Hypersonic Applications$1.2M
Apr 2024Federal contractDefense · SBIR Phase II Proposal F2D-10798 - Direct Write Frequency Selective Surfaces For Hypersonic Applications$1.2M
Dec 2023Federal contractDefense · SBIR Phase I$140K
Nov 2023Federal grantDefense · Phase I · Sbir/sttr Phase I Research & Development Novel Tri-band Antenna To Enable Enhanced SM-3 Communications (1023-012-007)$150K
Nov 2023Federal contractDefense · Sbir/sttr Phase I Research & Development Novel Tri-band Antenna To Enable Enhanced SM-3 Communications (1023-012-007)$150K
Nov 2023Federal grantDefense · Phase I · SBIR Phase I$140K
Sep 2023Federal contractGeneral Services A · SBIR Phase III Gbs Task Order 13. This To Extends From SBIR Phase I And Phase II Contract Awards.$4M
Sep 2023Federal grantDefense · Phase II · Compact Wideband Direction Finder (1023-013-002)$900K
Sep 2023Federal grantDefense · Phase II · 2nd Phase II Radiation Shielding (SI Technologies)$1.3M
Aug 2023Federal contractDefense · SBIR Phase I$140K
Apr 2023Federal contractDefense · STTR II Manufacture Of Accurate, Dual-sided, Capacitive Sheets$1.2M
Apr 2023Federal contractDefense · Ewaac Pac$1K
Mar 2023Federal contractGeneral Services A · Gbs To 12 Sbc Obsolescence. This SBIR Phase III Extends From SBIR Topic Number 011SN-0382 Disposable Tactical Satellite Antenna System, Phase I Contract F19628-01-C-0045, And Phase II Contract F19628-03-C-0039.$967K
Jan 2023Federal contractDefense · Efficient Processing Low Variability Printed Resistive Films$1.2M
Jul 2022Federal grantDefense · Phase II · Soldier-Integrated Radar Detection and Location (1022-004-004)$1.1M
May 2022Federal contractDefense · F2D-3601 / Maturation Of Low-variability RADAR Absorbing Honeycomb Core Products And Process$1.2M
May 2022Federal contractDefense · Provide Design, Development, And Integration Of Technologies And Demonstrators For Asset Protection And Counter Threats Technology.$1.8M
Mar 2022Federal contractDefense · SBIR Phase II R&d$2.5M
Nov 2021Federal contractDefense · SBIR Phase II "agilepod Capability Enhancements: Wideband Multifunction RF Sensing$750K
Nov 2021Federal contractDefense · Manufacture Of Accurate, Dual-sided, Capacitive Sheets (1021-015)$150K
Jul 2021Federal grantDefense · Phase I · Man Portable Starlink System$150K
Jun 2021Federal contractDefense · Task Order For Asset Protection And Counter Threats Technology Enhancements.$1.4M
Jun 2021Federal contractDefense · SBIR Phase II - Enabling Peel-and-stick Conformal Antennas For Suas$27.4M
May 2021Federal contractDefense · Feasibility Study, SBIR Phase I, Topic SOCOM211- 001, Antenna Distribution System$150K
Apr 2021Federal contractDefense · Phase II Pitch Day$949K
Jan 2021Federal grantDefense · Phase I · Soldier-Integrated Radar Detection and Location (1000-565)$166K
Dec 2020Federal contractDefense · Sbir/sttr Phase I Research&development - Non-destructive Techniques For Characterization Of Defects In Printed RF Materials And Devices$150K
Dec 2020Federal contractDefense · Sibr Phase 1: Multi-function RF Seeker Aperture Enabling Multi-modal Senso$50K
Sep 2020Federal contractDefense · Army Small Business Innovation Research (SBIR) Phase II Effort Entitled, "low-swap-c, Radome-integrated Printed Antennas For Hypersonic Weapons (1000-550)$1.7M
Sep 2020Federal contractGeneral Services A · Gbs SBIR III TO1 47QFCA20F0046 Awarded.$3.7M
Jun 2020Federal contractDefense · SBIR Phase II Topic A18-020 "multi-material Additive Manufacturing Of Low-swap-c (1000-509)"$1.0M
Apr 2020Federal grantDefense · Phase II · Low-SWAP-C, Radome-Integrated Printed Antennas for Hypersonic Weapons (1000-550)$1.7M
Apr 2020Federal contractDefense · SBIR For Modular Multi-band Cmoss Radiohead$111K
Apr 2020Federal contractDefense · Army Small Business Innovation Research (sbir)phase I For Effort Entitled,"printed Cynlindrically Conformal RF Components And Embedded Electronics"$111K
Apr 2020Federal contractDefense · Task Order 0001$3.5M
Oct 2019Federal grantDefense · Phase II · Multi-Material Additive Manufacturing of Low-SWAP-C (1000-509)$535K
Sep 2019Federal contractDefense · Multi-function Munitions Seeker Antenna System$1.5M
Sep 2019Federal contractDefense · Sbir/sttr Phase II R&d - Lightweight Multifunctional Components For Next-gen Kill Vehicles (1000-498)$1.7M
Aug 2019Federal grantDefense · Phase II · Multifunction Airborne RF Sensor (1000-437)$1.5M
Jun 2019Federal contractDefense · Small Business Innovative Research Phase I For Modular Mutlifunction Payloads Providing Wideband Capability For The Agilepod Family$150K
Jun 2019Federal contractDefense · SBIR Phase I Peel-and-stick Antennas$150K
May 2019Federal contractDefense · SBIR Phase I (2) Interim Reports (1) Final Report$225K
Mar 2019Federal contractDefense · Sbir/sttr Phase II R&d - Dual-band Datalink Antenna System For Bmd Assets (1000-483)$996K
Mar 2019Federal grantDefense · Phase II · Low-SWaP-C, 3D Printed Radiation Shielding For Microelectronics (1000-477)$996K
Nov 2018Federal contractDefense · Sbir/sttr Phase I Research&development - Rugged, Printed Electronic Components For Structurally-integrated Missile Circuitry (1000-470)$100K
Sep 2018Federal grantDefense · Phase II · Direct Write Printed Resistive Film1000-417$1.5M
Sep 2018Federal contractDefense · Sttp - Direct Write Printed Resistive Film$2M
Aug 2018Federal contractDefense · Additive Manufacturing Of A Conformal, Wideband Array For Attritable Airborne Platforms$750K
Jul 2018Federal grantDefense · Phase II · Ka-Band Communications Antenna System for Submarine Masts (1000-449)$1M
Jul 2018Federal grantDefense · Phase I · Multi-Material Additive Manufacturing of Low-SWAP-C Antennas and RF Devices (1000-442)$100K
Jul 2018Federal contractDefense · 6 Month SBIR Phase 1 A18-020. The Contractor Shall Develop Polymer/ceramic Composite Electromagnetic (em) Materials And Low-temperature Processed, High-conductivity Inks For Multi-material Additive Manufacturing (am) Of Antennas$150K
Jun 2018Federal contractDefense · Sbir/sttr Phase I Research&development; Structurally-integrated, Multifunctional Components For Next-gen Kill Vehicles (1000-445)$150K
May 2018Federal contractDefense · Igf::ot::igf - SBIR I - Additive Manufacturing Of A Conformal, Wideband Array For Attritable Airborne Platforms$150K
Nov 2017Federal grantDefense · Phase I · Low SWAP, 3D Printed Radiation Shielding For Microelectronics (1000-424)$150K
Sep 2017Federal contractDefense · Igf::ot::igf Army Small Business Innovation Research Phase II Entitled, "printed Materials With Embedded Electronics And Radio Frequency Components (1000-409)"$1.7M
Aug 2017Federal contractDefense · Igf::ot::igf Low Cost, Multi-materials, Additive Manufacturing Process For Space Systems Applications$750K
Aug 2017Federal contractDefense · Igf::ot::igf Bridge Gap Purchase Order For Army Small Business Innovation Research (SBIR) Phase I Option From Contract W31P4Q-16-C-0122 In Support Of Efforts Entitled "printable Materials With Embedded Electronics And Radio Frequency Components (1000-349)"$50K
Jun 2017Federal contractInterior · Igf::ot::igf Improved RF Seeker Antenna System For Medium Caliber Projectiles$1.4M
May 2017Federal grantDefense · Phase I · Electrically Small, Materials-Enhanced VHF/UHF Antenna for High Power Transmit Applications (1000-402)$125K
Apr 2017Federal contractDefense · Igf::ot::igf Services For R&d Small Business Research (sbir)program, Expendable Active RF Technology For Helicopters (earth) Topic A16-097$100K
Apr 2017Federal contractDefense · Igf::ot::igf Base - SBIR Phase I$80K
Feb 2017Federal contractDefense · Igf::ot::igf Array Commercial Timescales (act)$2.3M
Oct 2016Federal contractDefense · Igf::cl::igf The Purpose Of This Task Order Is To Satisfy The Guaranteed Minimum Under Indefinite Delivery Indefinite Quantity Contract N00014-16-D-2007.$500
Sep 2016Federal contractDefense · Igf::ot::igf--army SBIR Phase 1$100K
Jul 2016Federal contractDefense · Research And Development Igf::ot::igf$1.5M
Jun 2016Federal contractDefense · Igf::ot::igf Low-cost, Multi-materials, Additive Manufacturing Process For Space System Applications (1000-356)$150K
Jun 2016Federal contractDefense · Igf::ot::igf SBIR I Conformal Ultra-wideband Structurally Integrated RF Seeker$150K
Jun 2016Federal contractDefense · Igf::ot::igf Low-profile Ultra-wideband Direction-finding Antenna Technology$150K
Jun 2016Federal grantDefense · Phase I · Low Cost Conformal SATCOM Arrays for Airborne Platforms (1000-351)$150K
Apr 2016Federal contractDefense · Igf::ot::igf Research And Development, STTR Phase II$1.7M
Mar 2016Federal contractInterior · Igf::ot::igf Improved RF Seeker Antenna System For Medium Caliber Projectiles$150K
Apr 2015Federal contractDefense · 7237 Phase II Research&development - "SM-3 Systems Design Improvements (1000-299)" Igf::ot::igf$1.0M
Apr 2015Federal contractDefense · Igf::ot::igf$1.7M
Feb 2015Federal grantDefense · Phase II · Printed, Flexible Ultracapacitors Based on Novel, High-Performance Carbon Nanomaterials (1000-298)$1M
Nov 2014Federal grantDefense · Phase II · Ultra Wideband Low Profile Antennas for Software Defined Radios (1000-304)$200K
Nov 2014Federal contractDefense · SBIR Phase II Topic N131-013 Research And Development$1.5M
Oct 2014Federal contractDefense · Igf::ct::igf SBIR 14.2$80K
Aug 2014Federal contractDefense · Igf::ot::igf Wideband Wide Scan Low Profile Antennas For Intra-flight Communications And Data Links$749K
Jul 2014Federal contractDefense · Igf::ot::igf Sttp II: Ultra High Performance RADAR$1.1M
Jul 2014Federal contractDefense · Navy STTR 14.A$150K
Jul 2014Federal contractDefense · Rapid Innovation Fund (rif) Baa 13-020 Award. Arrays For Navy Shipboard Io Systems$2.8M
May 2014Federal contractDefense · Igf::ot::igf SBIR I: Printed, Low-cost Organic Field Effect Transistor Biosensors$150K
May 2014Federal contractDefense · SBIR Pi S12 Technology Awd$80K
Feb 2014Federal contractInterior · Igf::ot::igf SI2 Technologies, Inc - Wideband Tunable Multiferroic Electronics For Advanced RF Systems$100K
Dec 2013Federal contractDefense · Igf::ot::igf SBIR Ph I Research&development - "SM-3 Systems Design Improvements (1000-269)"$125K
Nov 2013Federal contractDefense · Igf::ot::igf Small Business Technology Transfer (STTR) Phase I. This Effort Is To Establish Capabilities And Perform R&d To Develop Printed, High-performance Ultracapcitors To Meet The Army's Need For Lightweight Energy Storage.$150K
Nov 2013Federal contractDefense · Igf::ot::igf Contract W15P7T-14-C-A202 Is Under The Small Business Innovative Research (SBIR) Program, Phase I. Proposal Title: Reduced Profile Muos Metaferrite Antenna For Uhf Satcom.$1.0M
Nov 2013Federal contractDefense · R&d - SBIR Phase II - Ultra Wideband Electronically Steered Multi-beam Array.$740K
Aug 2013Federal contractDefense · Igf::ot::igf Lightweight High Gain Launch Vehicle Antenna$150K
Jul 2013Federal contractDefense · Igf::ot::igf Wideband Wide Scan Low Profile Antennas For Intra-flight Com$150K
Jun 2013Federal contractDefense · Darpa SBIR Phase I Effort Entitled "low-cost Printable Brain Recording System"$100K
Sep 2012Federal contractDefense · STTR Phase II - Roll To Roll Inkjet Printing Of Subwavelength Photonic Devices$750K
Sep 2012Federal contractDefense · Requirement To Provide Services To Develop And Evaluate An Electrially Small Spiral Antenna To Support Handheld Ground Penetrating RADAR (gpr) Functionality.$373K
Jul 2012Federal contractDefense · SBIR Phase I$150K
Jun 2012Federal contractDefense · Contract W15P7T-12-C-A324 Is Under The Small Business Innovative Research (SBIR) Program, Phase I. Proposal Title: Reduced Profile Muos Metaferrite Antenna For Uhf Satcom$150K
Apr 2012Federal contractDefense · Research And Development In The Physical, Engineering, And Life Sciences (except Biotechnology)$80K
Mar 2012Federal contractDefense · Phase II SBIR Topic N103-204 "ultra Wideband Conformal Low Profile"$750K
Jan 2012Federal contractDefense · New Phase I - AF112-195 S12 Technologies$150K
Nov 2011Federal contractDefense · SBIR Phase II Research And Development$1.2M
Aug 2011Federal contractDefense · SBIR Phase I$80K
May 2011Federal contractDefense · 6 Month STTR Phase I$100K
Apr 2011Federal contractDefense · Small Business Innovative Research Phase I Effort. Forward Looking Ground Penetrating RADAR Arrays.$100K
Dec 2010Federal contractDefense · SBIR Phase I Contract$150K
Dec 2010Federal contractDefense · Darpa Ph II$750K
Sep 2010Federal contractDefense · Phase II SBIR$730K
Jul 2010Federal contractDefense · Status Report$80K
Apr 2010Federal contractDefense · SBIR Phase I For Helmet Mounted RADAR Systems (hmrs.$70K
Mar 2010Federal contractDefense · The Contractor Shall Provide Research For SBIR N091-041$900K
Mar 2010Federal contractDefense · Variable Coverage Wide Field Of View Metamaterial Antenna For Satellite Communications$100K
Dec 2009Federal contractDefense · This Is The SBIR Phase I Effort For R&d Services. It Include Four Month Options. It Is For "ultra Wideband Conformal Printable Metamaterial Antennas."$70K
Dec 2009Federal contractDefense · " Miniature Turnable Ultra Wideband Metamaterial Antenna"$591K
Nov 2009Federal contractDefense · Phase I SBIR$120K
May 2009Federal contractDefense · Final Monthly Report/payment$150K
May 2009Federal contractDefense · Darpa Phase I SBIR$99K
Apr 2009Federal contractDefense · The Contractor Shall Provide Research For Antennas$750K
Apr 2009Federal contractDefense · The Contractor Shall Provide Research For Jammers$750K
Feb 2009Federal contractDefense · Ph II$750K
Dec 2008Federal contractDefense · An Embedded State Sensing System For Adaptively Guided Aircr$100K
Aug 2008Federal contractDefense · Phase I SBIR Topic N07-184$100K
Jul 2008Federal contractDefense · Research$750K
Jun 2008Federal contractDefense · Darpa SBIR Phase II$750K
Apr 2008Federal contractDefense · SBIR I Topic N08-018 Transmitter For Jammers$150K
Jan 2008Federal contractDefense · Design And Manufacture Of A Symbiotic Satellite Structure To Improve The Performance Of Phased Arrays$100K
Sep 2007Federal contractDefense · Darpa SBIR Phase II$750K
Aug 2005Federal contractDefense · 200511!000297!5700!FA8718!ESC/PKR !FA871805C0071 !a!n! !n! ! !20050830!20071130!131640919!131640919!131640919!N!SI2 Technologies, Inc !200 Turnpike Rd !chelmsford !MA!01824!13100!017!25!CHELMSFORD !middlesex !mass !+000000375000!N!N!000000740140!AJ91!RDTE/OTHER Sciences - Basic Research !S1 !services !000 !* !541710!E! !3! ! ! ! ! !202$740K

Federal awards are summed by year (145 awards); hover a bar for the split. Form D reports securities sold, which can differ from an announced round; filings are numbered in the order they were made.

Standing among 164 peers

Line = median

Defense · Device

Federal grants#25 · top 15%
Granted patents#29 · top 18%

Cumulative measures favor older companies. Rankings describe position today, not outcome. Below the median, ranks show as a band rather than a number.

Founders and team

No founders are linked to this company yet.

Founders appear once a person is matched to the company through its own patents, grants or filings. We never infer people from social profiles.

Checked: USPTO inventors; federal award principal investigators; SEC Form D related persons · Oct 23, 2026

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What it has protected

USPTO · 6 granted of 8

Jul 15, 2025GrantedAntenna Elements And ArrayUSPTOUS 12,362,491
Jan 2, 2024GrantedAntenna Elements And ArrayUSPTOUS 11,862,879
Mar 22, 2022GrantedAntenna Elements And ArrayUSPTOUS 11,283,176

Show all 8 patent records

Antenna Elements And ArrayJul 15, 2025 · US 12,362,491Granted
Antenna Elements And ArrayJan 2, 2024 · US 11,862,879Granted
Antenna Elements And ArrayMar 22, 2022 · US 11,283,176Granted
Antenna Elements And ArrayMar 19, 2020 · Application 16685939Pending
Antenna Elements And ArrayDec 24, 2019 · US 10,516,214Granted
Method Of Making Arbitrarily-shaped Multifunctional StructureDec 3, 2019 · US 10,498,015Granted
Method Of Making Arbitrarily-shaped Multifunctional StructureApr 18, 2017 · US 9,627,744Granted
Laser Transfer Articles And Method Of MakingApplication PCTUS2004028841Pending

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Regulatory activity · Defense

Sector-level, not company-level

11 Jun 2026Danger Zone; Waters of Carr Creek and Whitehall Bay in the Vicinity of the Naval Support Activity AnnapolisEngineers Corps
13 Mar 2026Federal Acquisition Regulation; Federal Acquisition Circular 2026-01; IntroductionNational Aeronautics and Space Administration
13 Mar 2026Federal Acquisition Regulation: Trade Agreements ThresholdsNational Aeronautics and Space Administration
13 Mar 2026Federal Acquisition Regulation; Federal Acquisition Circular 2026-01; Small Entity Compliance GuideNational Aeronautics and Space Administration
27 Aug 2025Federal Acquisition Regulation; Federal Acquisition Circular 2025-06; Small Entity Compliance GuideNational Aeronautics and Space Administration
27 Aug 2025Federal Acquisition Regulation; Federal Acquisition Circular 2025-06; IntroductionNational Aeronautics and Space Administration

Rules are matched to sector, not to company. Recent activity in a sector is context rather than a signal about this business — until rules are matched to what a company actually builds, the section is shown as context and nothing more.

Sources

Federal grants from SBIR/STTR, NIH, NSF and DoD records. Federal contracts from USAspending.gov. Private capital from SEC Form D. Patents from USPTO. Publications from OpenAlex. Regulatory activity from the Federal Register. Press matched on company name.

How to read this page

Figures show associations in public records, not causes or predictions. Nothing here is investment advice. An em-dash means no record was found under this company's name, not that none exists.

Data freshness

SEC Form D filings through Oct 23, 2026. SBIR and STTR awards through Oct 21, 2026.