Here is a post-WoR list:
Arcadia (CSA-100%)
Grendel - Arcadia BattleMech Plant CM-T15
Grizzly (closed) - (unknown plant)
Hellfire - Arcadia BattleMech Plant CM-T4
Highlander IIC - Arcadia BattleMech Plant CM-T15
Mist Lynx - Arcadia BattleMech Plant CM-O3
Naga - Manufacturing Plant WA3
Dadga (CSA-100%)
Glass Spider 3 - Dagda Industriplex Zeta
Undine - (unknown plant)
Wyvern IIC - Manzikert Fabrication & Assembly Plant Gamma
Gatekeeper (CSA-100%)
(none known)
Grants Station (CSA-100%)
(none known )
Haven
2 ProtoMech Factories - (CSA took facility when CBS was annihilated)
3 BattleMech Factories - (CSA took facility when CBS was annihilated)
Hoard (CSA-100%)
naval yard - (still under construction, based on ex CSV Leviathan Prime naval yard)
Battle Armor factory on continent Tolan (FM: CC, page 127)
Huntress (CCC-50%, CCY-10%, CSA-30%, CSL-10%)
Dire Wolf - Phan Industrialplex (factory razed by 2ndSL)
Ebon Jaguar - Huntress Manufacturing Plant DL-6
Horned Owl 4 & 5 - Abysmal Manufacturing Complex
Miraborg dropship - Huntress Yards
Mist Lynx - Huntress Production Facility Epsilon
Sabutai - Lootera Spaceworks
Warhawk - Abysmal Manufacturing Complex (CGS last known holder)
Warhawk - Phan Industrialplex (CFM last known holder)
former CSJ Proto factories
Londerholm (CCC-20%, CCY-45%, CSA-10%, CSL-25%)
Sabutai - (unknown plant, CIH factory seized by CCY, WoR pg 53)
(unknown unit) - Beta Industriplex (CCY took from CIH post CSJ annh, 9th Striker Cluster, Pg 50 FMWC)
Sheridan (CSA-100%)
Adder - Sheridan LM-TA 8, 9, 10
Blood Asp - Sheridan LM-TA 8, 9, 10
Corona - (unknown plant)
Strana Mechty (CCC-25%, CCY-25%, CSA-25%, CSL-25%)
Cephalus - Kerensky Memorial Manufacturing (CCY held, former Woodsman factory)
Dire Wolf - Wolf Clan Site #1
Dragonfly - Upsilon Plant 2J (CIH last known holder)
Elemental - (unknown plant)
Jengiz - Bear’s Den
Kingfisher - Strana Mechty Mech Production Facility Beta
Osteon - Kerensky Memorial Manufacturing (in CCY territory, former Woodsman factory)
Linebacker - Wolf Clan Site 2
Septicemia - Kerensky Memorial Manufacturing (CCY held)
Timber Wolf - Wolf Clan Site #2
Strato Domingo (CCY-10%, CSA-60%, CSL-30%)
Thresher - Manufacturing Plant DSF-51
Tamaron (CCC-25%, CCY-50%, CSA-25%)
Procyon - Clan Coyote Beta Plant 3F
Savage Coyote - Landen Mech Production Facility (per FM:U pg 56)
Septicemia - (unknown plant, previously hidden, WoR pg 153)
Tathis (CSA-100%)
(none known)
Planets lost/abandoned:
Albion:
Burrock Battlemech - Albion Armor Works Gamma (CSA)
Marauder IIC 2+3 - Albion MMA Complex(CSA)
Turk Omnifighter - Complex 19 (CSA)
Circe
Great Wyrm - Cudahy Assembly Plant Delta
Locust IIC 2+3 - no specific facility mentioned
Eden
Hellbringer - no specific facility mentioned
Jagatai Omnifighter - Eden,Wolf Armor Work
Phantom - W-5 Facilities
Ironhold
Black Lanner - Ironhold Alpha Complex (->CSV, maybe among the isorla when CSV was defeated)
Fire Falcon - Ironhold Alpha Complex (->CSV, maybe among the isorla when CSV was defeated)
Kit Fox - Ironhold Plant 9 (->CSV, maybe among the isorla when CSV was defeated)
Night Gyr - Ironhold Gamma Complex (->CSV, maybe among the isorla when CSV was defeated)
Scytha Omnifighter - Complex VI (->CSV, maybe among the isorla when CSV was defeated)
Summoner - Eagle Craft Group (->CSV, maybe among the isorla when CSV was defeated)
Turkina - Ironhold Beta Complex (->CSV, maybe among the isorla when CSV was defeated)
Visigoth Omnifighter - Complex 9 (->CSV, maybe among the isorla when CSV was defeated)
Lum
Arcadia dropship - no specific facility mentioned
Bashkir Omnifighter - Crest Foundries
Carrier dropship - Rumiko Yards
Kit Fox - Production Line Gamma 2
Marshall
Broadsword dropship - Marshall Yards
Commando IIC - Marshall Light Assembly Station
New Kent
Battle Cobra - Novy Minsky Armaments Plant
Batu Omnifighter - Mercer Foundries
Crossbow - Novy Minsky Armaments Plant
Matador - Novy Minsky Armaments Plant
Scylla - Novy Minsky Armaments Plant
Tyre 1+2 Aerospace fighter - New Kent Orbiter D7
Paxon
Dire Wolf - non specific mentioned (claimed by CSA, WoR, page 83)
Gorgon - non specific mentioned (claimed by CSA, WoR, page 83)
Priori
Piranha, Constantin Assembly Plant M27A-E(CSA)
Sulla Omni Fighter - Forge 7(CSA)
Tranquil
Adder - W-7 Facilities
Ice Ferret - W-7 Facilities
Lobo - W-7 Facilities
Vinton
Grendel - no specific facility mentioned (WoR, page 130)
Mad Cat Mk II - no specific facility mentioned (WoR, page 130)
Piranha - no specific facility mentioned (WoR, page 130)
York
Bloodkite 1+2 - York BattleMech Y3 Facility
Cecerops 1+2+3 - Reserve Industriplex-2
Chrysaor 2 - Reserve Industriplex-2
Crimson Langur - York Y2 Facility
Morrigu 1+2 - York Vehicle Y2 Facility
Shamash - York Vehicle Y2 Facility
Stooping Hawk - York OmniMech Y1 Facility
Designs without specified production facalities mentioned:
Mechs
Hellbringer (CHH made, every Clan has a factory or access to the design)
Hunchback IIC (all Clans use)
Hunchback IIC 2 (CSA make/use lots)
Hunchback IIC 3 (CCY make/use lots)
Mad Dog (CSJ made, made by virtually all Clans, favored by CHH)
Stormcrow (CSR made, factories throughout the homeworlds)
Vehicles
Anhur Transport (all Clans use, CSA & CHH use in combat units)
Ares Medium Tank (all Clans use, CCY use most)
Asshur Artillery Spotter (all Clans use)
Donar Assault Helicopter (all Clans use)
Hachiman Fire Support Tank (CHH & CSA use in front-line roles)
Huitzilopochtli
Indra Infantry Transport (all Clans use)
Ishtar Heavy Fire Support Tank (CHH & CSA primarily make & use, though all have some)
Odin Scout Tank (all Clans use)
Oro Heavy Tank (all Clans use)
Ku Wheeled Assault Tank
Mars Assault Tank (CHH use heavily)
Mithras Light Tank (all Clans use)
Svantovit 1 & 2 (all Clans use)
Zorya Light Tank (all Clans use, CCC use most)
Aerospace
Amon Aerospace fighter
Avar Omni Fighter
Chaeronea 1, 2 ,& 3 Aerospace fighter
Confederate dropship
Hydaspes 1 & 2 Aerospace fighter
Issus 1, 2, & 3 Aerospace fighter
Kirghiz Omni Fighter
Lion dropship
Mercer dropship
Outpost dropship
Overlord C dropship
Sassanid dropship
Union C dropship
Vandal Omni Fighter