Vonovia: EUR 84.7 Billion of Property Value — and the Rate Behind It Comes From In-House

There is an investor weakness that disguises itself as diligence: trusting the appraisal. We see a figure carried to one decimal place, sitting inside an audited set of accounts, and the questioning stops right there. Numbers with decimals feel measured. At Vonovia SE (Frankfurt Stock Exchange: VNA, ISIN DE000A1ML7J1) that figure reads EUR 84,698.1 million — the fair value of the property portfolio as of March 31, 2026. Let us make a deal: we go and look at where it comes from. Not to tear it down, but to understand what it rests on.

That names the central tension of this analysis, and it runs through every chapter: Vonovia’s operating business is about as predictable as anything in the DAX — rent arrives, vacancy stays low, rental income rises every year. The largest item on the balance sheet is nonetheless not a measurement but a calculation. And the decisive input into that calculation, the interest rate, is chosen in-house. The stock market has been using a different one for years.

What Vonovia actually does

Vonovia is a landlord. That sounds banal, but it is the whole truth about the core of the business: as of March 31, 2026 the group managed 606,145 units, of which 530,506 were its own apartments — the rest belong to third parties and are managed under contract. The portfolios sit in Germany, Sweden and Austria. The company is headquartered in Bochum; the shares have traded on the Frankfurt Stock Exchange since July 11, 2013 and have been in the DAX since September 2015.

Around that rental business Vonovia has built three smaller segments. Value-add bundles the residential services — the in-house craftsmen organization, the energy business, metering services. Recurring Sales is the steady sale of individual apartments to owner-occupiers and private investors. Development builds new units, partly for the group’s own portfolio and partly for sale to third parties. In the first quarter of 2026, of Adjusted EBITDA Total of EUR 711.6 million, EUR 629.7 million came from rentals alone — just under 89 percent. Anyone who wants to understand Vonovia has to understand the rent first.

And the rent is working. Organic rent growth in the first quarter of 2026 was 4.0 percent, of which, per the company release of May 7, 2026, 2.6 percentage points came from the official rent indices, 1.0 point from modernization investments and 0.4 points from new construction. The occupancy rate was 97.7 percent and the collection rate — the share of rent actually received — 99.6 percent. For a company with more than half a million apartments, that is a remarkably calm set of numbers.

How the stock landed on our desk

Not through a scanner but through other people’s attention: on August 4, 2026 Vonovia sat on the wallstreet-online forum ranking of the stocks most discussed by German retail investors. That is not a buy signal; it is a sign that a lot of people are asking the same question at the same time. With a stock whose reported book value per share has for years been roughly twice its market price, the question is obvious: who is right?

The timing makes it more delicate, and that belongs up front rather than in a footnote. The half-year report 2026 is scheduled for August 5, 2026 at 7:00 a.m. CEST. Everything you read here stands on the position as of March 31, 2026 or December 31, 2025. And that half-year report contains the first full remeasurement of the portfolio since the annual accounts — more on that below.

The numbers over the years — what genuinely impresses

Start with what is actually strong. Adjusted EBITDA Total, the group’s headline operating measure, rose over five years from EUR 2,254.4 million (2021) through EUR 2,606.1 million (2022), EUR 2,583.8 million (2023) and EUR 2,641.8 million (2024) to EUR 2,800.8 million in 2025. That is not rocket growth, but it is a result that never broke down through an interest rate shock, a war and two property downturns.

The rent line is calmer still. Monthly in-place rent per square meter climbed from EUR 7.33 (2021) through EUR 7.49, EUR 7.74 and EUR 8.01 to EUR 8.38 (2025), and stood at EUR 8.46 on March 31, 2026. The vacancy rate moved between 2.0 and 2.3 percent over the same period. Translated: in no single year did more than three out of a hundred apartments stand empty. That is why Vonovia never wobbled in the hard years.

And then there is the other line. It sits in the same income statement, and it has nothing to do with rent.

Net income from fair value adjustments of investment properties was plus EUR 7,393.8 million in 2021, minus EUR 1,177.6 million in 2022, minus EUR 10,651.2 million in 2023, minus EUR 1,559.0 million in 2024 and plus EUR 1,390.0 million in 2025. Between 2021 and 2023 that is a swing of roughly EUR 18 billion in reported earnings, on a portfolio of apartments that barely changed. No tenant moved out, no roof caved in. What changed was the calculation.

Which is why the bottom line at Vonovia always needs a second look. In 2025 profit for the period was EUR 4,185.5 million; in the first quarter of 2026 it was EUR 250.3 million, down 51.4 percent. Operationally nothing collapsed between those two periods. The valuation was simply missing.

Uncomfortable truth no. 1: the biggest balance sheet item is a calculation

As of December 31, 2025 Vonovia reported EUR 82,392.8 million of investment properties — the real estate held as a financial investment. Of that, EUR 81,268.7 million is carried at fair value under the option in accounting standard IAS 40.30. In plain terms: the balance sheet does not show what the properties cost, it shows what they are estimated to be worth today — and every change in that estimate runs through the income statement.

The value is determined by the group’s in-house valuation department using a discounted cash flow method. The everyday picture: estimate how much rent an apartment will throw off over the coming decades, deduct administration and maintenance, then discount that future stream back to today — using an interest rate. The lower the rate, the more that future rent is worth now. In addition, the independent appraisers CBRE GmbH and Savills Sweden AB valued the portfolio; according to the report their market value was "at the level of the internal valuation result."

The auditor, PricewaterhouseCoopers, declared this a key audit matter — the section of the auditor’s report reserved for the issues that gave the auditor the most trouble. Its reasoning is the single most important sentence in this analysis.

"The measurement of investment properties is based on a large number of relevant parameters which are normally subject in some respects to uncertainties with regard to estimates and judgments by the executive directors. Even small changes in the measurement parameters can result in material changes in fair value."

— PricewaterhouseCoopers GmbH Wirtschaftspruefungsgesellschaft, Vonovia SE, Annual Report 2025, Independent Auditor’s Report — key audit matter "Measurement of investment properties"

For balance, in both directions: this is not a qualification. The audit opinion is unqualified. PwC assessed the valuation models, the completeness of the portfolio data and the appropriateness of the parameters, recalculated samples and inspected selected properties. A key audit matter is not a warning sign; it is a pointer to the place where judgment is involved. That place is exactly what we look at next.

Uncomfortable truth no. 2: a quarter point of interest moves EUR 5.7 billion

For Vonovia Germany the discount rate as of December 31, 2025 was 5.1 percent, down from 5.2 percent a year earlier, and the capitalized interest rate was unchanged at 3.3 percent. Other assumptions: market rent growth of 2.0 percent, a stabilized vacancy rate of 1.4 percent, inflation of 2.0 percent and residential market rent of EUR 9.28 per square meter per month. None of these are arbitrary — they are derived from the property market, cross-checked externally and carried forward consistently over years. But they are not measurements either.

Vonovia itself has calculated how much rides on them. The notes contain a sensitivity table, and its fourth column is the one that matters.

A quarter of a percentage point more or less changes the value of the German portfolio by plus 8.6 or minus 7.4 percent, the Swedish one by plus 6.8 or minus 6.0 percent and the Austrian one by plus 3.5 or minus 3.3 percent. The report explains how to use it: the absolute impact on values is calculated by multiplying the percentage impact by the fair value of the investment properties.

So let us do that. As of December 31, 2025 the fair values of the investment properties were EUR 70,377.4 million (Germany), EUR 7,055.4 million (Sweden) and EUR 2,728.2 million (Austria). A quarter point more interest produces roughly EUR 5.7 billion of lost value; a quarter point less produces roughly EUR 6.6 billion of gain. For comparison: group equity stood at EUR 32,371.8 million on March 31, 2026. A quarter point is therefore about a sixth of equity — and, on 848,435,623 voting rights at the end of July 2026, roughly EUR 6.74 per share.

Worth remembering: where the interest rate makes the valuation, the balance sheet is an opinion with decimal places. That is not an accusation aimed at Vonovia. It is how IAS 40 works, and every large European landlord reports this way. It is simply something other than a bank statement.

Uncomfortable truth no. 3: there was no valuation at all in the first quarter of 2026

In the income statement of the interim statement for the first quarter of 2026, the line "net income from fair value adjustments of investment properties" shows a dash for both comparative periods. No gain, no loss — no valuation. The report explains why in its own chapter on fair values.

"The entire portfolio will be fully remeasured for the interim consolidated financial statements as of June 30, 2026, taking into account the updated portfolio data, market developments and, in particular, the discounting and capitalized interest rates."

— Vonovia SE, Interim Statement for the First Quarter of 2026, Fair Values (reporting date March 31, 2026, published May 7, 2026)

That is why the fair value rose only from EUR 84,448.2 million to EUR 84,698.1 million in the first quarter of 2026, up 0.3 percent — and almost all of that increase came from capital spending rather than a fresh assessment. The report puts it plainly: the evaluation of the market trend with a view to March 31, 2026 showed a general sideways trend, and the fair values calculated at the end of 2025 "have been adjusted to reflect the investments made up to March 31, 2026."

The same applies to book value per share. EPRA NTA — net tangible assets as defined by the European Public Real Estate Association, loosely: the property value net of debt — rose from EUR 46.28 per share (December 31, 2025) to EUR 46.57 (March 31, 2026). In its release of May 7, 2026 Vonovia says the figure increased "only slightly" because no portfolio valuation was scheduled for the first quarter, and adds that it expects the positive development in property values seen over the past 18 months to continue in the first half of 2026.

That is the fair rebuttal to this chapter, and it belongs here: management expects write-ups, not write-downs. The point stands nonetheless — the number that shows up in every data sheet as "book value" carries, between two valuation dates, about as much news as an old photograph.

Uncomfortable truth no. 4: the share count grows quietly

Dilution means your slice of the cake gets smaller because new slices keep being cut. At Vonovia this does not happen through big capital raises but in small, unremarkable steps.

From 822,852,925 shares on December 31, 2024 the count went to 848,216,385 on December 31, 2025 — plus 25,363,460 shares, or 3.1 percent, in a single year. Where they came from: 12,768,562 shares from the scrip dividend of June 24, 2025, chosen by 35.53 percent of shareholders instead of the cash dividend, and 12,594,898 shares from the 2025 authorized capital, exchanged for shares in Deutsche Wohnen SE. At the end of July 2026 Vonovia reported 848,435,623 voting rights under Section 41 of the German Securities Trading Act.

The bigger step came on June 23, 2026. Vonovia announced by ad-hoc release the placement of convertible bonds totaling EUR 850 million — upsized from the EUR 750 million announced earlier the same day. The bonds run to June 30, 2031, pay no periodic interest and are redeemed at 109.78 percent of par, equivalent to a yield to maturity of 1.875 percent a year. The initial conversion price is EUR 28.0402 — a conversion premium of 37.5 percent over the reference share price of EUR 20.3929, the volume-weighted average price on XETRA during the placement. Existing shareholders’ subscription rights were excluded.

Do the arithmetic: EUR 850 million divided by EUR 28.0402 is roughly 30.3 million shares, a good 3.5 percent of the current count, if every bond converts. Under the terms Vonovia may also settle in cash. And the headroom is bigger still: the 2025 authorized capital stood at EUR 234,260,979 on December 31, 2025 — roughly 27 percent of the share count, with shareholders’ subscription rights excludable.

Growth paid for with fresh shares is never entirely free. At Vonovia the effect has so far been moderate and well argued — the scrip dividend preserves cash, the share exchange integrated an entire group. But anyone comparing EPRA NTA per share over the years is comparing a number whose denominator is growing.

Uncomfortable truth no. 5: the 1.37 percent interest rate is running out

Vonovia financed itself exceptionally cheaply during the low-rate years. Nominal obligations from financial liabilities stood at EUR 42,633.3 million on December 31, 2025, and the largest block within that is EMTN corporate bonds of EUR 14,993.3 million at an average interest rate of 1.37 percent. Convertible bonds from earlier years cost 0.88 percent, the bond inherited from Deutsche Wohnen 1.18 percent, and mortgage loans 2.55 percent.

What new money costs appears in the same interim statement. On January 23, 2026 Vonovia issued a CHF 150 million bond with a coupon of 1.5516 percent — 3.797 percent after currency hedging. On February 5 came SEK 1,500 million at 3.052 to 3.53 percent, and on February 18 a JPY 10 billion private placement at 2.94 percent, 4.08 percent after hedging. The gap between 1.37 percent and roughly 3.8 percent is the real headwind of the coming years.

It is already visible. Interest expenses rose in the first quarter of 2026 from EUR 199.2 million to EUR 235.9 million, up 18.4 percent, and the adjusted net financial result deteriorated from minus EUR 184.3 million to minus EUR 205.6 million, up 11.6 percent. In its release of May 7, 2026 Vonovia cites "around EUR 20 million higher financing costs" as the main reason why Adjusted EBT fell 4.1 percent to EUR 462.2 million despite higher rental income. Per the maturity schedule in the annual report, EUR 4,063.3 million falls due in 2026, EUR 4,801.4 million in 2027 and EUR 4,899.9 million in 2028.

The counterweight: the balance sheet can carry it. As of March 31, 2026 the loan-to-value ratio was 45.1 percent, adjusted net debt to Adjusted EBITDA Total 13.7x and the interest coverage ratio 3.7x. All four contractually agreed financial covenants were met, several with plenty of room: LTV of 44.6 percent against a 60 percent limit, secured LTV of 14.3 against 45 percent, interest coverage of 3.7x against 1.8x, unencumbered assets of 173.0 against 125 percent. Four rating agencies place Vonovia in investment grade: S&P at BBB+ (stable, August 19, 2025), Moody’s at Baa1 (stable, December 8, 2025), Fitch at BBB+ (stable, December 23, 2025) and Scope at A- with a negative outlook (June 19, 2025).

What the stock costs

Deliberately as an order of magnitude and explicitly dated, because daily prices are not an argument. The 2025 year-end share price was EUR 24.54 and market capitalization on December 31, 2025 was roughly EUR 20.8 billion. EPRA NTA per share on the same date was EUR 46.28. The most recent price documented in a mandatory filing comes from the ad-hoc release of June 23, 2026: EUR 20.3929, the volume-weighted average price during the placement of the convertible bond.

The chart shows the central tension of this analysis in two lines. EPRA NTA per share fell from EUR 62.63 (2021) through EUR 57.48, EUR 46.82 and EUR 45.23 to EUR 46.28 (2025). The year-end share price moved from EUR 48.50 through EUR 22.02, EUR 28.54 and EUR 29.32 to EUR 24.54. In none of those five years did the lines meet. The market has not accepted the book value since 2022 — it is using a higher interest rate than the valuation department.

You can boil that down to one question. Take the book value and the stock traded at the 2025 year-end price at a discount of roughly 47 percent; set the reference price of June 23, 2026 against EPRA NTA as of March 31, 2026 and the discount is about 56 percent. A discount is not proof of undervaluation, though — it is the market’s opinion about the valuation assumptions. And either side can be wrong.

The professionals’ view, also dated: as of December 31, 2025, 23 analysts covered Vonovia regularly, the average target price was EUR 34.39 per share, 61 percent had a buy rating, 17 percent a hold and 22 percent a sell. The consensus therefore sits well above the share price and well below the book value. The annual general meeting on May 21, 2026 approved a dividend of EUR 1.25 per share for 2025 (prior year EUR 1.22), a yield of 5.1 percent on the 2025 year-end price.

The same caution has paid off before: at Gerresheimer the decisive statement was not in the press release either, but in the auditor’s report. At Vonovia it sits in the notes — except this time it is not a warning but a sensitivity calculation.

Opportunities and risks at a glance

Opportunities

• The core business is unusually stable: 530,506 owned apartments, a vacancy rate of 2.3 percent, an occupancy rate of 97.7 percent and a collection rate of 99.6 percent (first quarter and March 31, 2026 respectively). Organic rent growth was 4.1 percent in both 2024 and 2025.
• The 2026 guidance was confirmed in May: Adjusted EBITDA Total of EUR 2.95 to 3.05 billion, Adjusted EBT of EUR 1.9 to 2.0 billion, rental income in the Rental segment of EUR 3.45 to 3.55 billion and organic rent growth of around 4.2 percent.
• The balance sheet ratios have room: loan-to-value of 45.1 percent, interest coverage of 3.7x and an equity ratio of 35.2 percent (March 31, 2026); all four covenants met and investment-grade ratings from four agencies.
• The gap between price and book value is wide: EUR 24.54 at the 2025 year end against EPRA NTA of EUR 46.28 per share. Should the remeasurement as of June 30, 2026 confirm the positive trend management expects, that gap widens further.
• The dividend is paid and approved: EUR 1.25 per share for 2025, a yield of 5.1 percent on the 2025 year-end price.

Risks

• The largest balance sheet item hangs on a self-set assumption: 0.25 percentage points of rate change equals roughly EUR 5.7 billion of write-down or EUR 6.6 billion of write-up per the company’s own sensitivity table, against EUR 32.4 billion of equity.
• Refinancing is getting more expensive: EUR 14,993.3 million of EMTN bonds at an average 1.37 percent face new issues at 3.5 to 4.1 percent after currency hedging. Interest expenses rose 18.4 percent in the first quarter of 2026.
• Leverage remains high: adjusted net debt of EUR 38,601.9 million equals 13.7 times Adjusted EBITDA Total (March 31, 2026).
• The share count is rising: up 3.1 percent in 2025 alone, plus a EUR 850 million convertible bond with a conversion price of EUR 28.0402 and 2025 authorized capital of EUR 234,260,979 with subscription rights excludable.
• A growing share of earnings does not belong to Vonovia shareholders: EUR 39.8 million of the EUR 250.3 million profit for the first quarter of 2026 went to non-controlling interests, and adjusted minority earnings rose 50.4 percent.
• Regulation is the permanent factor in this business: rent indices, modernization pass-throughs and energy requirements determine a large part of rent growth — 2.6 of the 4.0 percentage points in the first quarter of 2026 came from the official rent indices.

A human conclusion

We started with trusting the appraisal — with the reflex of treating a figure as measured simply because it looks precise and has been audited. Vonovia’s Annual Report 2025 shows both sides very clearly. The business is real, the rent arrives, and Adjusted EBITDA has grown through five difficult years. And the largest item on the balance sheet is still a calculation whose most important input is chosen afresh each year.

What follows is not a recommendation but a reading aid. There are two separate stories inside one company here. One sits in the Rental segment and is about as quiet as a DAX stock gets. The other sits in a single line of the income statement and can move ten billion euros in a single year. Anyone buying the stock buys both — even if only the first one was on their mind.

And the next date is fixed: the entire portfolio will be remeasured as of June 30, 2026, with the result published in the half-year report on August 5, 2026. If you are reading this analysis, you may already know a number we could not. Hold it next to the EUR 5.7 billion from the sensitivity table and you will see immediately how much of the change came from the rental market and how much from the interest rate. What you make of that is your decision. And that is exactly as it should be.

More deep dives are collected in our research section.

Sources

• Vonovia SE — Annual Report 2025 (356 pages, German and English editions), PDF dated March 18, 2026, published with the full-year figures on March 19, 2026: key figures, letter from the Management Board, report on the economic position, notes (investment properties, Level 3 valuation parameters, sensitivity analyses, development of the subscribed capital, authorized capital, call options, summarized financial information for the Deutsche Wohnen Group), independent auditor’s report
• Vonovia SE — Interim Statement for the First Quarter of 2026, reporting date March 31, 2026, signed by the Management Board on April 29, 2026, published May 7, 2026: key figures, fair values, financial position, financing, covenants, outlook, condensed interim consolidated financial statements
• Vonovia SE — Investor Relations, corporate news and ad-hoc announcements: quarterly release of May 7, 2026 ("Good start to the year — 2026 guidance confirmed"), annual general meeting release of May 21, 2026 (dividend of EUR 1.25, attendance 58.91 percent, PwC appointed as auditor), ad-hoc announcements of June 23, 2026 on the announcement and the placement of the EUR 850 million convertible bonds
• Vonovia SE — publication of the total number of voting rights under Section 41 WpHG of July 31, 2026: 848,435,623 voting rights as of the end of July 2026
• Vonovia SE — report page for the half-year report H1 2026, retrieved August 4, 2026: the Q2 2026 interim statement will be published on August 5, 2026 at 7:00 a.m. CEST
• Hook: wallstreet-online forum ranking of the most discussed stocks among German retail investors, as of August 4, 2026

This analysis is journalistic commentary based on publicly available documents. It is not investment advice, not a solicitation to buy or sell securities, and not a personal recommendation. Shares can lose substantial value, and a total loss of the capital invested is possible. Every figure carries the reporting date of its source; the most recent periodic report evaluated is the interim statement for the first quarter of 2026, with a reporting date of March 31, 2026. The half-year report 2026 is published on August 5, 2026 and had not appeared at the editorial deadline of August 4, 2026. The author holds no position in Vonovia SE at the time of publication.