WINCHESTER TECHNOLOGIES LLC

Burlington, MA · Defense · Private

Thin-film frequency selective limiters (TF-FSLs) using epitaxial yttrium iron garnet (YIG) films for RF signal protection

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Updated Oct 23, 2026 · winchestertech.com

Sector: Defense
Headquarters: Burlington, MA
Total capital: $12.6M

Federal grants: $3.7M; 8 awards · 2015–2020; Rank in peer group#23 of 34
Private capital raised: None on recordNo Form D filings on SEC EDGAR. Some raises are not filed.
Federal contracts: $8.9M; 16 awards · Defense, Interior; Rank in Defense#422 of 1442
Granted patents: 3; 4 pending · first 2020; Rank in peer group#9 of 34

Capital timeline

Latest events

Sep 2023Federal contractDefense · Army STTR Phase II For The Effort Entitled Integrated Ferrite Inductors And Transformers For Power Electronics With Ultra-low Swap-c$1.3M
Jul 2022Federal contractDefense · Army SBIR Phase II For Proposal Entitled, "additively Manufactured Functionally Graded Radomes For Hypersonic Vehicles"$1.9M
Aug 2021Federal contractDefense · Army Small Business Innovation Research (SBIR) Phase I Effort Entitled, "additively Manufactured Functionally Graded Radomes For Hypersonic Vehicles"$56K
Aug 2020Federal contractDefense · Army Small Business Innoavation Program (SBIR) For The Effort Entitled "compact And Passive Thin-film Frequency Selective Limiters For Resilient Antijamming GPS Receivers"$1M
Jul 2020Federal contractDefense · Army Small Business Innovation Research (SBIR) Phase I Effort Entitled, "additively Manufactured Functionally Graded Radomes For Hypersonic Vehicles"$111K
Jul 2020Federal grantDefense · Phase I · (1) Rapid Reconstitution of Submarine Shore Very Low Frequency (VLF) Communications System$150K
May 2020Federal grantDefense · Phase I · Additively Manufactured Functionally Graded Radomes for Hypersonic Vehicles$111K

Show 17 earlier federal awards

Apr 2020Federal grantDefense · Phase II · Compact and Passive Thin-Film Frequency Selective Limiters for Resilient Antijamming GPS Receivers$1M
Dec 2019Federal grantDefense · Phase I · Low Temperature Deposition of Magnetic Materials on Topological Materials$167K
Nov 2019Federal grantDefense · Phase I · Continuous Communications Through Plasma During Hypersonic Flight$100K
Oct 2018Federal contractDefense · Igf::ot::igf STTR Phase II Base Labor, "multiferroic Materials For RF Applications"$1.0M
Sep 2018Federal contractDefense · The Primary Goal Of The Proposed Effort Is To Develop A Low Temperature Deposition Technology For Low-loss, High Quality Nano-crystalline Ferrite Films And Thick Ferrite/insulator Layers For Non-reciprocal And Tunable RF Device Circuits Integrated On Large Scale Printed Circuit Board (pcb) Panels.$1M
Sep 2018Federal contractDefense · Cmos Compatible Deposition Of Multi-ferroic Films For Tunable Microwave Applications$1M
Jun 2018Federal grantDefense · Phase II · CMOS Compatible Deposition of Multi-Ferroic Films for Tunable Microwave Applications$1M
Jun 2018Federal contractDefense · Research And Development, STTR Phase II, Igf::ot::igf$750K
Oct 2017Federal contractDefense · Igf::ot::igf Army Small Business Innovation Research Program (SBIR) Phase I Contract Action For Statement Of Work Entitled, "tunable Textured Composites..." RA-T109-17$100K
Aug 2017Federal contractDefense · Research And Development Igf::ot::igf$125K
Aug 2017Federal grantDefense · Phase I · CMOS Compatible Deposition of Multi-Ferroic Films for Tunable Microwave Applications$150K
Jul 2017Federal contractDefense · Igf::ot::igf STTR Phase I N17A-T013 Base$125K
Aug 2016Federal contractDefense · Igf::ot::igf Phase I First Monthly Technical Report$100K
May 2016Federal contractDefense · STTR Pi R&d. Igf::ot::igf$150K
Jan 2015Federal grantDefense · Phase II · Multiferroic Materials for RF Applications$1M
Apr 2014Federal contractInterior · Igf::ot::igf Multiferroic Materials For RF Applications Implement And Fully Fund Contract$100K
Mar 2011Federal contractDefense · Research And Development In The Physical, Engineering, And Life Sciences (except Biotechnology)$80K

Node area is scaled to amount. Form D reports securities sold, which can differ from an announced round; filings are numbered in the order they were made.

Standing among 34 peers

Line = median

Defense · Material

Federal grantsBelow median
Granted patents#9 · top 26%

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.

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

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What it has protected

USPTO · 3 granted of 7

Nov 28, 2024PendingMethods of Manufacturing Hybrid Magnetic Substrate, Via-based Ferrite Inductors and TransformersUSPTOApplication 18759287
Sep 17, 2024GrantedMillimeter Thick Magnetic Pcb With High Relative Permeability And Devices ThereofUSPTOUS 12,094,630
Jul 25, 2023GrantedCompact And Efficient Magnetodielectric AntennaUSPTOUS 11,710,901

Show all 7 patent records

Methods of Manufacturing Hybrid Magnetic Substrate, Via-based Ferrite Inductors and TransformersNov 28, 2024 · Application 18759287Pending
Millimeter Thick Magnetic Pcb With High Relative Permeability And Devices ThereofSep 17, 2024 · US 12,094,630Granted
Compact And Efficient Magnetodielectric AntennaJul 25, 2023 · US 11,710,901Granted
Manufacturing Method For Electrostatically Tunable Magnetoelectric Inductors With Large Inductance TunabilityMay 26, 2020 · US 10,665,383Granted
Via-based Ferrite Inductor and TransformerApplication 63571584Pending
Millimeter thick magnetic print circuit boards (PCBs) with a high relative permeability of 50~150 and related devices and systemsApplication 63116827Pending
Magnetoelectric Antenna ArraysApplication 63115148Pending

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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.