Affiliated Managers Group, Inc. (AMG)

Investment Committee Summary

Investment Thesis

At $387 (10 October 2026) Affiliated Managers Group is valued as an affiliate-equity holding company whose earnings track assets under management, the realised fee rate, and performance and carry income. The house view for the Financials — Asset Mgmt cluster splits the outcome between Fee Compression / Outflows / Market De-Rate on the downside and Upside — Alts / Private-Markets Inflows on the upside, with Mid-Cycle — AUM + Fee Growth as the central path; the equity is a geared claim on which of the three arrives, since the parent owns economic interests rather than the assets themselves. Probability-weighting that tree gives $363, the twelve-month target is $363, and the triangulated fair value is $333, leaving the shares trading rich to the anchor set by -14%. HOLD follows from that gap rather than from any operational complaint. One caveat is owed: the simulation's probability of clearing spot falls below the plausible band for a liquid equity, which suggests the bear weighting may be too severe, so the gap is a direction to respect rather than a magnitude to trust. The most damaging risk is that fee compression and net outflows reduce earnings and the multiple simultaneously.

Narrative drafted 2026-08-16 by claude-opus-5 under supervision; reviewed by Marinus 2026-08-16.

The dashboard below is the whole argument on one page: spot ($387) against each valuation anchor, the scenario tree, technicals and the options-implied move.

Anti-Thesis (The Real Bear Case)

The bear case is the affiliate model working in reverse. The group does not run the assets; it owns economic interests in boutiques whose fee rates are set by a market migrating to passive vehicles and to lower-priced mandates. In Fee Compression / Outflows / Market De-Rate the three lines that carry earnings fail together: markets fall, net flows turn negative on top of the market decline, and the realised fee rate ratchets down as clients reprice. Performance and carry income — the most cyclical component — disappears first and does not accrue at all in a drawdown. The structural path lands below the 52-week low on the heaviest single bear weight in the tree — a live state, not a tail.

Key Debate

P/E Multiple explains 84% of Monte Carlo outcome variance — i.e. value is set by the multiple the market will pay, a rate/sentiment regime bet as much as an earnings bet.

What the Market Is Pricing In

At the current price, the market pays 10.5× consensus forward EPS, vs the house DCF terminal 8.0×. The house DCF sits 20% below spot, so the market is pricing in more than the house case — roughly 1.9pp of revenue CAGR.

Variant perception: the house view is below-consensus, and the thesis is primarily FCF-driven.

Historical-range cross-check: 52-week range $230–$393, centre $301 (-22% vs spot); spot sits at the 96th percentile of the range. Low-weight mean-reversion cross-check, not a fundamental anchor.

Scenario Analysis

The scenario tree spans a structural 'Structural — Fee Compression / Outflows / De-Rate' downside ($163) to a 'Bull — Re-Rate' bull case ($654); the probability-weighted blend (PWEV $363) is -6% versus spot.

SBC charge: scenario targets are gross per-share prices; the PWEV is reduced by one year of stock-based-compensation dilution (2.0% of shares, on SBC ≈ 5% of revenue), trimming the gross PWEV of $370 to $363 (-2.0%). SBC is charged once, as dilution — never also deducted from FCF.

Scenario rationale — the driver path behind every target:

• Structural — Fee Compression / Outflows / De-Rate (20%, $163). Structural impairment — fee compression / outflows / market de-rate: earnings AND the multiple compress together. Target sits below the 52-week low by construction.
• Market-Drawdown / Outflows (17%, $276). Cyclical downturn — AUM (markets + flows) + fee rate + performance/carry (alts: fundraising momentum) weakens for 1–2 years before normalising.
• Base — AUM + Fee Growth (35%, $384). Mid-cycle — normalised AUM (markets + flows) + fee rate + performance/carry (alts: fundraising momentum); disciplined capital allocation; steady returns.
• Growth — Alts / Private-Markets Inflows (20%, $518). Upside — alts / private-markets inflows lifts earnings above mid-cycle; the multiple expands modestly.
• Bull — Re-Rate (8%, $654). Upside tail — sustained tight conditions or a structural re-rate on alts / private-markets inflows.

Valuation Triangulation

Three weighted anchors — an intrinsic dcf, a scenario-weighted pwev and a monte carlo median (student-t + regime switching) — read them with their basis in mind. The Monte Carlo, the scenario PWEV, any DCF's exit-multiple terminal and any peer re-rate key off a market multiple, so they are not independent; only a DCF's explicit-period cash flows are multiple-free, and its terminal usually carries most of its value. The discipline is to read the spread, not to treat three numbers as three independent votes.

The house blend DECLARES five anchor weights — DCF 35%, scenario PWEV 25%, Monte Carlo 15%, sum-of-parts 15%, peer re-rate 10%. For this name sum-of-parts, peer P/E re-rate are not computed, so 25% of the declared weight is redistributed across the anchors that exist — which is why the weights above differ from the declared ones. The fair value is unaffected by this disclosure; the blend has always worked this way. The company-lever row in the Sensitivity section is an illustrative EBIT × multiple value, not a sum-of-parts anchor.

Monte Carlo — the outcome distribution

10,000 paths, Student-t shocks (fat tails) with a regime-switching overlay. The median lands at $335 and 34% of paths finish above spot. The variance decomposition shows the p/e multiple is the dominant swing factor (84% of variance). Value is a multiple bet: fundamentals move the answer far less than the rating does.

DCF — explicit-period cash flows with an exit-multiple terminal

A 5-year cash-flow path discounted at a WACC of 10.0%, plus a terminal value of final-year FCF × 8.0x — a terminal multiple equal to 0.85 × the base multiple that the Monte Carlo and the scenario tree also use → $311. The terminal value is 60% of enterprise value, so this anchor moves with the multiple assumption. The heaviest anchor in this blend (47%); because its terminal is a market multiple, it is not independent of the multiple-driven anchors.

Peer benchmarking — relative value

Against the peer cohort the engine carries no peer-implied price for this name — no P/E-implied price is carried for this name, and no revenue basis either — so the cohort is shown for context only. A premium is only justified by superior growth/margins; otherwise it is multiple risk. Excluded from the weighted blend — shown only as a market cross-check.

Across all anchors the spread is 15% of the median — moderate (healthy method disagreement — read the blend with care).

Sensitivity

DCF/share — WACC × terminal multiple

DCF/share — revenue CAGR Δ × model op-margin Δ (Δ applied to the DCF's house margin path)

Tornado — DCF/share swing by driver (widest first)

Company lever — value at the base multiple vs Asset Management multiple (base 10.0x)

Illustrative: segment EBIT × multiple, plus net cash, over basic shares — it does not enter the triangulated fair value.

Risk / Reward & Margin of Safety

That ratio is (triangulated FV ÷ price − 1) ÷ (1 − 'Structural — Fee Compression / Outflows / De-Rate' target ÷ price). 'Structural — Fee Compression / Outflows / De-Rate' ($163, probability 20%) is the lowest-target scenario in the tree, taken gross of SBC dilution. With a leg missing the ratio is withheld rather than computed from a magnitude. Bull case (Bull — Re-Rate): $654.

Company Overview & Business Model

Affiliated Managers Group, Inc. — FINANCIAL SERVICES · ASSET MANAGEMENT. Affiliated Managers Group, Inc., through its affiliates, is an asset management company providing investment management services to mutual funds, institutional clients and high net worth individuals in the United States. The company is headquartered in Prides Crossing, Massachusetts.

Company description as supplied by Alpha Vantage; not checked against the company's filings.

How it makes money.

† Model margin = gross margin − the opex ratio calibrated so the Monte Carlo median EPS meets the EPS target; it is not a reported operating margin.

Revenue-Segment Breakdown

The company-specific drivers behind the valuation — each segment carries its own growth, margin, multiple and capex intensity. (Tags: FACT reported · ESTIMATE from disclosures · INFERENCE judgment.)

Named Exposures

Demand & pricing cycle (FACT/ESTIMATE)

Capital intensity & shareholder returns (ESTIMATE)

Structural risk vs optionality (INFERENCE)

Industry Context — Financials — Asset Mgmt

This name sits in the Financials — Asset Mgmt cluster as a asset management name. AUM (markets + flows) + fee rate + performance/carry (alts: fundraising momentum). Its scenarios are not guessed in isolation — they inherit a single, shared view of the cluster's driver cycle, so the names that depend on the same event are mutually consistent.

Value chain: CG (asset management) · CRBG (asset management) · SEIC (asset management) · AMG (asset management) · HLNE (asset management) · FHI (asset management)

Mapping note: name-level 'Structural — Fee Compression / Outflows / De-Rate' (20%) + 'Market-Drawdown / Outflows' (17%) map to cluster Fee Compression / Outflows / Market De-Rate (37%); name-level 'Growth — Alts / Private-Markets Inflows' (20%) + 'Bull — Re-Rate' (8%) map to cluster Upside — Alts / Private-Markets Inflows (28%) — the cluster row is the SUM of the mapped scenario probabilities, not a different estimate.

On the cluster's key downside — Fee Compression / Outflows / Market De-Rate — this name implies 37% vs the cluster house view of 37% (in line with the house). The cluster's full cross-stock reconciliation governs that the names which ride the same capex cycle assign it comparable odds.

Structure: Shared State — The Financials — Asset Mgmt cycle is the shared macro driver. Driver — AUM (markets + flows) + fee rate + performance/carry (alts fundraising). Dispersion — Members differ by cyclicality (quality compounders vs deep cyclicals).

Balance Sheet & Liquidity

Balance-sheet data as of 2025-12-31 (Alpha Vantage).

Capital Allocation

Free-Cash-Flow Quality

Accounting quality: SBC 5% of revenue; cash conversion (OCF/NI) 141% — cash-backed.

Earnings-Call Disconfirmation & Sentiment

Derived signals from the MCH market-data store (Alpha Vantage transcripts + news). Quantitative tone only — a disconfirmation flag, not a substitute for reading the call.

Management vs analyst tone (2026Q1): management +0.62 vs analyst floor +0.05 → delta +0.57 (n=11 mgmt / 4 Q&A; 82nd pctile across the S&P book, z +1.0).

Flag: TYPICAL — management-vs-analyst tone within the normal cross-sectional range.

News (last 365d, 170 articles): avg ticker sentiment +0.23 (bullish 32% / bearish 2%)

Consensus & Market Expectations

_Consensus figures: Alpha Vantage sell-side aggregates. Where the house view sits materially above or below the street, the divergence is itself a datum — see the thesis.

Catalyst Calendar

• 2026-11-02 (~24d) — Quarterly earnings — est. EPS $8.58 (AV EARNINGS_CALENDAR)

Forecast Track Record

• EPS surprise: beat 88% of the last 8 quarters; average surprise +3.8%.

Catalyst Timeline

5 catalysts in the next 90 days (of 12 tracked). Importance 1–3; confidence 0–1.

_Sources: extended.catalysts, data/catalysts/.json, data/catalysts/macro.json, AV DIVIDENDS, opex 3rd-Friday calc.

Decision Rules (Machine-Checked)

Stance: Hold — 0 bullish / 0 bearish / 1 caution rules triggered of 6 evaluable (0 lacked data).

Machine-checked rules over disclosed inputs. The authored falsification triggers elsewhere in this report are analyst judgment and are NOT evaluated here. The stance is what the model's own rules read on this name; it does not modify the published research rating, and it is not personal financial advice.

Reasons the Thesis Could Fail (Falsifiable)

Pre-registered signals that would break the thesis — each polices a specific scenario boundary and is checked at every earnings update:

• FY revenue ($B) < 2.35 (next reported fiscal year). (rationale withheld pending re-authoring — frozen figure or verdict)
• Probability-weighted fair value (PWEV) at the next re-run < 387.26 (any scheduled re-run). (rationale withheld pending re-authoring — frozen figure or verdict)
• Share price (close) < 162.73 (5 consecutive sessions). (rationale withheld pending re-authoring — frozen figure or verdict)

Fact / Inference / Speculation

• FACT: Spot $387; 52-week range $230–$393; engine rating HOLD; house target $363 (-6%). (source: Alpha Vantage 2026-10-09, 10 October 2026)
• INFERENCE: Triangulated FV $333 (-14% vs spot · triangulated FV); the rating tracks the Monte-Carlo + scenario-PWEV core; the DCF anchor sits below the multiple-discipline core.
• SPECULATION: At current prices the embedded bet is that the market keeps paying the current multiple through the capex cycle — a regime call the engine cannot verify from fundamentals alone.

Conviction Score

Research Conviction measures the strength and quality of the research setup — input coverage, financial quality, valuation support, process agreement. It is NOT the probability that the recommendation succeeds; the forecast track record section is the evidence on that.

62.7/100 (confidence band 53.3–72.2), 71st percentile of 893 covered names (as of 2026-10-09). Weighted composite under config ros-1.20.0 — every component and its inputs below.

Score history: 58.0 → 57.9 → 58.4 → 57.9 → 58.3 → 63.1 → 63.2 → 62.8.

Probability-Weighted Return Profile

Horizon: 1 year — at this horizon CAGR equals total return by definition. Expected values are the probability-weighted sums over the full scenario set below.

The gross expected return is the probability-weighted scenario return (it reconciles to the gross PWEV); the diluted figure applies the SBC share-count charge and matches the published PWEV-based target.

Expected Alpha

Expected return minus the return this name is REQUIRED to deliver for its risk (1-year horizon). Constants are pre-registered (preregistered-static (amendment #2, 2026-07-29); not fitted to MCH outcomes).

A negative expected alpha does not change the rating — it says the expected return does not clear the risk-adjusted hurdle at today's price. Rating mechanics are unchanged by this section.

Probability Cross-Checks

Not authoritative. The scenario probabilities in this report are AUTHORED — a judgement about how the world might go, not a measurement. Nothing below modifies them, the target, the rating or any position size. These checks ask only whether anything outside our own model agrees with us; where it does not, that is information for the reader, not a correction we have quietly applied.

Authored set: 5 scenarios, probabilities summing to 1.0, mean target $369.85.

Factor Exposures

Cross-sectional percentiles over 893 covered names (style scores sector-demeaned; thematic = return-beta to the theme's proxy ETF). 50 = estate median.

Market interaction: correlation vs SPY +0.57, vs QQQ +0.47 (trailing ~1y daily returns).

Rating Bridge

Rating = HOLD because:

• Probability-weighted scenario value implies -6% vs spot
• Monte Carlo median implies -13% vs spot
• DCF fair value (exit-multiple terminal) implies -20% vs spot — but this is terminal-value sensitive (exit-multiple $311 vs Gordon $483, 55% apart), so it carries less weight
• Bear case (Structural — Fee Compression / Outflows / De-Rate) downside is -58% vs spot
• Net: the valuation anchor itself sits 14.0% below spot, so there is no reward leg to weigh against the bear case and the reward-to-risk ratio is withheld rather than computed off a negative upside. The rating is not asymmetric enough for a Buy and not impaired enough for a Sell — hence Hold.

Model Appendix

DCF — line items

FCF is bridged: NOPAT + D&A − Capex − ΔNWC (capex intensity 1% of revenue, weighted from the segments) — not a single conversion fudge.

WACC 10.0% · Σ PV(FCF) $4B + PV(terminal) $7B = EV $11B; − net debt $2.6B → equity $8B ÷ diluted shares $0.03B = $311/share (exit-multiple terminal).

• Gordon terminal → $483/share — a single-point perpetual-growth cross-check at g = 2.5% (one growth rate, not a range; it is not in the blend).
• Incremental ROIC on the forecast capex ≈ 216% vs WACC 10.0% → above WACC — the build is value-creative.

Weighted fair-value math

Assumption Register

Sensitivity-ranked drivers (widest fair-value swing first): Revenue CAGR ±3pp (96.0); Terminal × ±15% (73.0); Model op margin ±3pp (43.0); WACC ±1pp (31.0); Capex intensity ±15% (3.0).

Inputs, Sources & Confidence

Every load-bearing input, labelled by type and confidence. (reported fact · company guidance · consensus estimate · market data · house estimate · inference.)

Research Provenance

Load-Bearing Assumptions

The stock-based-compensation charge sits on a step boundary. SBC is 5.47% of filed revenue — 0.47pp above the 5% threshold where the authoring rule changes step. The 2.0%/yr dilution it carries reduces the published target by about 2.0%; the other side of that threshold would carry roughly 1.5%/yr. This input is a step, not a measurement, and a modest revision to either the SBC or the revenue figure would move it.

DCF: WACC 10.0%, terminal multiple 8×, FY+5 revenue $3B. Triangulation leans 47% on DCF, 33% on PWEV, 20% on the Monte Carlo median.