Summit Credit Union Cottage Grove, Wisconsin
Summit Credit Union is a state-chartered credit union headquartered in Cottage Grove, WI, established in 1935 (NCUA charter 67190), and it is regulated and insured by the NCUA. At Q2 2026 it reported 281,962 members and total assets of $8.52B (up 9.4% from Q2 2025), the largest of 98 credit unions headquartered in Wisconsin. Its net worth ratio was 10.34% at Q2 2026, in the well capitalized band.
Also written as Summit CU
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Data as of · sourced from NCUA 5300 call reports. How we update
- Charter
- State-chartered credit union
- Regulator
- NCUA
- Deposit insurance
- NCUA (NCUSIF)
- NCUA charter number
- 67190
- Headquarters
- Cottage Grove, WI
- Established
- 1935
- Total assets, Q2 2026
- $8.52B
- Assets vs Q2 2025
- +9.4%
- Members, Q2 2026
- 281,962
- Net worth ratio, Q2 2026
- 10.34%
- Latest call report
- Q2 2026, NCUA 5300 · Summit Credit Union call report
- Asset rank in state
- 1st of 98 in Wisconsin
- Routing number
- 275979034
- Branches
- 57
It has 11,214 more members than on June 30, 2025 (+4.1%). Its net worth ratio was up 0.46 percentage points from 9.88% on June 30, 2025. 1- to 4-family residential and other consumer real estate loans are its largest loan category, $4.55B of $6.91B in total loans on its June 30, 2026 filing. Its 60-day delinquency ratio of 0.65% is below the 0.68% median of the 454 credit unions with $1B to $10B in assets for Q2 2026. Its 10.34% net worth ratio is below that band's 10.89% median.
Credit unions merged into Summit Credit Union
Star Credit Union (2019) · W S P Credit Union (2018) · Baraboo Municipal Employees Credit Union (2017) · Education Employee Credit Union (2015) · Greater Milwaukee Credit Union (2013)
Frequently asked about Summit Credit Union
How big is Summit Credit Union?
At Q2 2026 it reported total assets of $8.52B and 281,962 members.
Where is Summit Credit Union headquartered?
It is headquartered in Cottage Grove, WI, United States.
When was Summit Credit Union founded?
It was established in 1935, per NCUA records.
Is Summit Credit Union FDIC insured?
No. The FDIC insures banks, not credit unions. It is a federally insured credit union (NCUA charter 67190): member shares are insured by the National Credit Union Share Insurance Fund, run by the NCUA, up to $250,000 per member, per insured credit union, for each account ownership category, the same limit the FDIC applies to bank deposits.
Who regulates Summit Credit Union?
It is a state-chartered credit union, supervised by its state credit union regulator and by the NCUA, which insures its shares.
Is Summit Credit Union well capitalized?
Its net worth ratio was 10.34% at Q2 2026, in the well capitalized band. NCUA considers a credit union well capitalized at a net worth ratio of 7% or higher.
What is Summit Credit Union's delinquency ratio?
Its delinquency ratio was 0.65% at Q2 2026: loans 60 or more days past due as a share of total loans.
What is Summit Credit Union's loan-to-share ratio?
Its loan-to-share ratio was 100.85% at Q2 2026: total loans as a share of member shares and deposits.
Credit Union Profile
- Headquarters
- Cottage Grove, WI 53527
- Charter Type
- State-chartered credit union
- Primary Regulator
- NCUA
- Insurance
- NCUSIF
- Established
- 1935
- NCUA Charter #
- 67190
- RSSD ID
- 734499
- Members
- 281,962
- Potential members
- 1,000,000
Size & Membership
Profitability
Q2 annualizedCapital & Asset Quality
Peer comparison: credit unions of similar size
It ranks against 454 credit unions with $1B to $10B in assets, as of Q2 2026. It is in the top quartile on 3 of 7 ranked measures and in the bottom quartile on 2.
| Metric | This credit union | Peer median | Rank among peers |
|---|---|---|---|
| Net worth ratio Middle half of peers: 9.81% to 12.63% | 10.34% | 10.89% | 37th below |
| Return on assets Middle half of peers: 0.59% to 1.25% | 1.40% | 0.89% | 81st top |
| Return on equity Middle half of peers: 5.37% to 10.92% | 13.54% | 8.07% | over 90th top |
| Net interest margin Middle half of peers: 3.05% to 3.80% | 2.98% | 3.45% | 23rd bottom |
| Efficiency ratio Middle half of peers: 63.16% to 77.23% | 58.23% | 70.59% | 86th top |
| Cost of funds Middle half of peers: 1.37% to 1.99% | 2.37% | 1.68% | under 10th bottom |
| Delinquency ratio Middle half of peers: 0.45% to 1.05% | 0.65% | 0.68% | 53rd above |
| Yield on assets Middle half of peers: 4.70% to 5.46% | 5.35% | 5.12% | 67th position only |
| Loan-to-share ratio Middle half of peers: 78.23% to 95.19% | 100.85% | 88.03% | 87th position only |
Quarterly trends
Last 6 quarters of 5300 filings. Under each chart, Q2 2026 against Q2 2025. How these charts are built
$8.52B total assets against $7.79B; $6.85B total shares and deposits against $6.24B; $6.91B total loans against $6.16B.
$881.5M net worth against $769.5M.
10.34% net worth ratio against 9.88%.
100.85% loan-to-share ratio against 98.72%.
0.65% delinquency ratio against 0.84%.
1.40% return on assets against 1.21%; 13.54% return on equity against 12.22%.
2.98% net interest margin against 2.92%.
281,962 members against 270,748.
Quarterly trend: last 6 quarters
| Quarter | Net worth ratio | ROA | Delinquency | Loan-to-share |
|---|---|---|---|---|
| June 30, 2026 | 10.34% | 1.40% | 0.65% | 100.85% |
| March 31, 2026 | 10.26% | 1.14% | 0.60% | 99.32% |
| December 31, 2025 | 10.23% | 1.54% | 0.73% | 100.06% |
| September 30, 2025 | 10.01% | 1.37% | 0.82% | 98.72% |
| June 30, 2025 | 9.88% | 1.21% | 0.84% | 98.72% |
| March 31, 2025 | 9.80% | 0.98% | 0.58% | 98.70% |
Scroll sideways to see every column.
Watch flags
Loans outstanding exceed total member shares (deposits). The credit union is funding the gap with borrowings or non-member sources that are more rate-sensitive and less stable than core member deposits. Industry heuristic, not a supervisory threshold.
How we read these figures
Glossary: net worth ratio, delinquency, ROA, loan-to-share. The net worth category is ours, from NCUA's 7% well and 6% adequately capitalized cutoffs. It is not NCUA's determination, which can differ. ROA, ROE and margin annualize the quarter; NCUA's Financial Performance Report annualizes the year to date (YTD). Peer rank interpolates size-band percentiles. Methodology.