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Cross-GSE top-15 servicers by combined MBS book UPB

Prompt

“Show me the top 15 real servicers by current MBS book UPB across BOTH Fannie and Freddie combined. Exclude the multi-servicer / SCR pool placeholders. Break out the Fannie share and Freddie share for each so I can see who leans which way.”

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Response

Combined Fannie + Freddie current MBS book UPB, top 15 real servicers (excluding the pool-level MULTIPLE / SCR / SCR - Mirror placeholders):

#ServicerFannie UPBFreddie UPBCombinedFannie share
1JPMorgan Chase Bank, N.A.$72.8B$83.7B$156.5B47%
2Truist Bank$38.1B$46.4B$84.5B45%
3New Residential Mortgage LLC$34.6B$40.2B$74.8B46%
4United Wholesale Mortgage, LLC$31.8B$36.2B$68.0B47%
5Rocket Mortgage, LLC$34.8B$30.9B$65.7B53%
6U.S. Bank National Association$33.8B$28.0B$61.8B55%
7Wells Fargo Bank, N.A.$42.5B$18.9B$61.4B69%
8PennyMac Loan Services, LLC$21.4B$35.3B$56.7B38%
9Citizens Bank, N.A.$22.7B$33.0B$55.7B41%
10Lakeview Loan Servicing, LLC$26.0B$16.3B$42.3B61%
11PennyMac Corp.$28.3B—$28.3B100%
12CitiMortgage, Inc.$19.1B$8.2B$27.3B70%
13PNC Bank, N.A.$15.7B$9.8B$25.5B62%
14Fifth Third Bank, N.A.$10.7B$13.1B$23.8B45%

What’s in the read:

  • Chase is the only top-5 name with more Freddie than Fannie book. JPMC’s Freddie servicing footprint ($83.7B) is 15% larger than its Fannie footprint ($72.8B). Compare to Wells (69% Fannie) or PennyMac LLC (38% Fannie / 62% Freddie) — the GSE tilt varies materially by servicer.
  • PennyMac splits its book across two legal entities on Fannie’s disclosure: PennyMac Loan Services, LLC ($56.7B combined) and PennyMac Corp. ($28.3B, Fannie-only). Aggregated to a single “PennyMac” the group is $85.0B combined — which would slot it into 3rd place. A servicer-name canonicalization step is required if you want the enterprise-level view.
  • The $2.9T “Multiple” sentinel on the Fannie side is real UPB — it’s pools with multiple servicers where no single one dominates. On the Freddie side, SCR and SCR - Mirror together carry ~$3.3T of internal Servicing Consolidation Reserve UPB during MSR transfers. Both are excluded here to give the “top real-money servicer” view; if you need the full book UPB accounting, include them separately.

Reference: mortgage.fnm_mbs_pool_details (snapshot 2026-06-19) and mortgage.fre_mbs_pool_details (snapshot 2026-07-01). The two snapshot dates are within 3 weeks of each other — monthly refresh cadences differ.

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