How Glacier Bancorp’s Q1 2026 Margin Expansion Affects Financial Outlook

Key drivers behind Glacier Bancorp’s gross margin expansion in Q1 2026

Glacier’s “margin expansion” in Q1 2026 is primarily reflected in the net interest margin (NIM) improvement, along with higher loan/earning-asset yields and lower funding costs. Management explicitly attributes the strong margin performance to “margin expansion” and notes that Q1 showed margin “firing on all cylinders,” as well as a shift in the relative contribution of balance-sheet levers versus prior quarters. ¹²

1) Strong improvement in Net Interest Margin (NIM)

• Glacier reported that NIM was 3.80% (tax equivalent) in Q1 2026, up 22 bps from the prior quarter and up 76 bps from the prior year first quarter—the clearest consolidated indicator of margin expansion. ¹
• Management highlighted this as the key driver of performance and emphasized that Q1 represented the largest quarterly increase over a 9-quarter expansion run, with the +22 bps being described as “the largest quarterly increase over that run.” ¹²

Interpretation: In a bank like Glacier, “gross margin expansion” in practice is typically driven by net interest income factors (asset yields minus funding costs), which is exactly what the company discussed via NIM, loan yield, funding cost, and earning-asset yield. ¹

2) Higher asset-side yields: loan yield and total earning asset yield increased

Management provided a detailed decomposition of the yield side:

• Loan yield: 6.16% in Q1 2026, up 7 bps from the prior quarter and up 39 bps from the prior year first quarter. ¹
• Total earning asset yield: 5.11%, up 11 bps from the prior quarter and up 50 bps from the prior year first quarter. ¹

Management also explained that going forward the company expects additional “margin lift” leaning more on the asset side, driven by asset repricing momentum. ³

• Glacier stated it has about $3 billion of loans repricing in the next year, expected to earn an incremental 75 to 100 bps, and noted new loan production rates “north of 6.5%.” ³

Interpretation: The Q1 margin expansion is consistent with both (a) immediate yield uplift (loan/earning-asset yield increases) and (b) continuing repricing/new production supporting further lift. ¹³

3) Lower cost of funding: funding cost declined meaningfully

On the liability/cost-of-funds side, Glacier reported:

• Total cost of funding: 1.4% in Q1, down 12 bps from the prior quarter and down 28 bps from the prior year first quarter. ¹

Management also indicated that this was part of a “boost from both sides of the balance sheet” in Q1, and that deposit costs are expected to stabilize with the Fed “on hold.” ³

Interpretation: Even if asset yields rise, margin typically expands only if funding costs fall or rise more slowly—Glacier’s Q1 pattern shows funding costs declining while yields increased. ¹³

4) Completion of the FHLB advances payoff removed a margin headwind (and contributed to Q1 strength)

A specific balance-sheet event was cited:

• Glacier said “we did finalize the payoff of our FHLB advances in Q1. So that's done.” ³

Additionally, management later discussed that part of the Q1 margin boost had an accounting/day-count related factor, noting “a little bit of an unwind” expected in Q2 and beyond from a “day count perspective,” while also emphasizing that the repricing lift is durable. ⁴

Interpretation: The FHLB payoff is a concrete liability-side change that can affect funding costs and/or the composition of interest-bearing liabilities, supporting Q1 margin expansion—while the day-count comment helps explain why the Q1 “spike” may not replicate perfectly quarter-to-quarter. ³⁴

5) Deposit-cost dynamics are leveling off; further lift expected to come more from assets

Management’s forward-looking framing clarifies what drove Q1 and what’s likely behind continued expansion:

• Glacier stated that with the Fed on hold, deposit costs “for the most part” will be stabilizing and moving sideways from here. ³
• Management explicitly said they “enjoyed a boost from both sides” but going forward… will lean more on the asset side for additional margin lift, because asset repricing has “momentum.” ³

Interpretation: Q1’s expansion came from both yield improvement and funding cost reductions, but the incremental continuation is expected to rely increasingly on asset repricing rather than further large funding-cost benefits. ³

6) Seasonality and footprint mix likely helped the size of Q1’s result

Management suggested Q1 strength was not purely “run-rate,” referencing seasonal effects:

• They described Q1 as having a “seasonal impact” and expected improvement in Q2 and Q3; they also pointed to geographic differences—Southwest region (less susceptible to cold-weather construction slowdown) having different seasonality than the northern part of the footprint. ⁵

Interpretation: Seasonality/region effects can influence loan production timing and repricing behavior, which affects yields and therefore NIM. This likely contributed to how large the Q1 NIM change (+22 bps) appeared versus a normal quarter. ⁵

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Bottom line

In Q1 2026, Glacier Bancorp’s margin expansion (reflected in NIM and related yield/cost metrics) was driven by a combination of:

1. Higher loan and earning-asset yields (loan yield +7 bps QoQ; earning asset yield +11 bps QoQ). ¹
2. Lower funding cost (cost of funding down 12 bps QoQ). ¹
3. A balance-sheet event—completion of the FHLB advances payoff in Q1—helping set up the quarter’s margin performance. ³
4. Net interest margin momentum continuing across multiple quarters, with Q1 representing the largest quarterly step-up within that expansion run. ²
5. Additional nuance from day-count/unwind effects and seasonality/footprint mix, affecting how much of Q1’s increase is expected to carry into subsequent quarters. ⁴⁵

All of these factors align directly with Glacier’s own decomposition of NIM drivers in the Q1 2026 transcript. ¹³²⁴⁵