What SEC filings does Acadian Asset Management Inc. submit to the SEC?

Acadian Asset Management Inc. (AAMI) submits several types of SEC filings including Form 4 (insider transactions), Form 144 (proposed insider sales), 8-K reports (material events such as earnings releases, acquisitions, leadership changes), and periodic reports — the 10-Q (quarterly) and 10-K (annual). All filings are publicly available through SEC EDGAR.

What does a Form 4 filing tell me about AAMI?

A Form 4 for AAMI discloses a transaction by a company insider — typically a director, officer, or 10%+ shareholder. It shows the source-reported date, number of shares, price, and updated ownership. These facts do not establish motive or predict future returns.

How do I interpret an 8-K filing from Acadian Asset Management Inc.?

An 8-K signals a material event requiring prompt disclosure. Common triggers include earnings pre-announcements, acquisitions, leadership appointments or departures, credit changes, or regulatory actions. Read the item codes inside the filing to understand exactly what was disclosed before drawing conclusions.

What is the difference between a 10-K and 10-Q for AAMI?

The 10-K is Acadian Asset Management Inc.'s annual report with fully audited financial statements, comprehensive MD&A, and complete risk factor disclosures — filed 60–90 days after fiscal year-end. The 10-Q is a lighter quarterly report with unaudited financials filed for the first three quarters. Together they provide a continuous financial picture of the company.

Where can I see all AAMI SEC filings directly on EDGAR?

You can view all historical Acadian Asset Management Inc. filings on the SEC EDGAR company page for AAMI. Each filing card on this page links directly to the original SEC document.

How often does Acadian Asset Management Inc. file with the SEC?

Acadian Asset Management Inc. files one 10-K per year and up to three 10-Qs per year. Form 4 insider transactions must be reported within two business days of each trade, so the frequency depends on how often insiders are buying or selling AAMI shares. 8-K filings occur whenever a material event happens — which can be several times per quarter for an active company.

AAMI SEC Filing News — Acadian Asset Management Inc.

Latest SEC filings for Acadian Asset Management Inc. (AAMI) explained in plain English. Covers insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). StrongBuyAnalytics provides navigation and brief excerpts or summaries; original filings remain at the SEC/source links and were authored by their filers, not StrongBuyAnalytics. Filing dates shown are source dates. Coverage and detection can be delayed or incomplete because of SEC availability, amendments, parsing, caching, or outages. Latest source filing date shown: 2026-08-06.

Acadian Asset Management Inc. is a publicly owned asset management holding company. The firm provides its services to individuals and institutions. It manages separate client focused portfolios through its subsidiaries. The firm also launches equity mutual funds for its clients. It invests in public equity, fixed income, and alternative investment markets through its subsidiaries. The firm was founded in 1980 is based Boston, Massachusetts. It was formally known as BrightSphere Investment Group …

Sector: Financial Services Industry: Asset Management Market Cap: $3.3B

Total Filings

Bullish Classifications

Bearish Classifications

Insider Transactions

Material Events (8-K)

Periodic Reports

Rule-based classifications for AAMI currently lean bearish. Of the 20 filing records displayed, 5 carry bearish classifications (such as insider sales or negative 8-K disclosures) versus 0 bullish. This does not necessarily signal fundamental deterioration — insiders sell for many reasons — but it is worth monitoring alongside the company's core financial metrics.

AAMI Filing Activity Snapshot 2026-02-27 — 2026-08-06

Insider Transactions (Form 4)

0 buys vs 3 sells

Net insider selling in this period — insiders sell for many reasons beyond conviction.

Largest Form 144 Filing

$157.17M

PAULSON & CO. INC. · 2026-06-17

1,900,000 shares · Form 144

Form 144 Notices

Proposed insider sales filed — Form 144 is a notice of intent, not a confirmed transaction. Actual sales are confirmed via Form 4.

Insider Transactions 9 · Forms 3, 4 and 5

A Form 4 is filed within two business days of a company insider — an officer, a director, or a holder of more than ten percent of the stock — changing their position in the shares. All 9 filings in this group are Form 4s for Acadian Asset Management Inc.

The difficulty with reading these filings as a group is that a single form type covers transactions that mean entirely different things. An executive spending their own money to buy stock and an executive having shares withheld to pay tax on a vesting grant both appear as a Form 4. Every filing below is therefore tagged with the nature of the underlying transaction, taken from the transaction code reported on the form itself.

Across the 9 insider filings shown, the breakdown is 3 compensation award, 3 option exercise and 3 open-market sale. 3 of them involved a discretionary open-market trade; the rest are compensation and administrative mechanics.

What each transaction type means

Compensation award ×3: Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.
Option exercise ×3: The insider converted options into shares. The exercise price was fixed when the options were granted, so the timing usually tracks an expiry schedule.
Open-market sale ×3: The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Form 4 Open-market sale Insider Selling 2026-08-05

AAMI insider Wiater Christina (PAO) sold 25,614 shares (~$2.24M)

Wiater Christina, listed as PAO at Acadian Asset Management Inc., reported an open-market sale of 25,614 AAMI shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	7,978	$86.61	$691.0K
`S`	Open-market sale	17,389	$87.49	$1.52M
`S`	Open-market sale	3	$88.11	$264.33
`S`	Open-market sale	244	$92.36	$22.5K

Filing: Form 4 (Insider Transaction) Insider: Wiater Christina (PAO) Shares: 25,614 Est. Value: $2.24M

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-06-22

AAMI insider PAULSON & CO. INC. (10% Owner) sold 1,900,000 shares (~$146.78M)

PAULSON & CO. INC., listed as 10% Owner at Acadian Asset Management Inc., reported an open-market sale of 1,900,000 AAMI shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	1,900,000	$77.25	$146.78M

Filing: Form 4 (Insider Transaction) Insider: PAULSON & CO. INC. (10% Owner) Shares: 1,900,000 Est. Value: $146.78M

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-06-15

AAMI insider Form 4 filed for equity award, exercise, or tax withholding

Trebbi Barbara (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`G`	Gift	10,260	—	—
`G`	Gift	10,260	—	—
`A`	Compensation award derivative · Restricted Stock Units	1,288	—	—

Filing: Form 4 (Insider Transaction) Insider: Trebbi Barbara (Director) Shares: 20,520

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-06-15

AAMI insider Form 4 filed for equity award, exercise, or tax withholding

Chersi Robert J (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Restricted Stock Units	1,288	—	—

Filing: Form 4 (Insider Transaction) Insider: Chersi Robert J (Director)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-06-15

AAMI insider Form 4 filed for equity award, exercise, or tax withholding

Paulson John (Director, 10% Owner) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Restricted Stock Units	2,253	—	—

Filing: Form 4 (Insider Transaction) Insider: Paulson John (Director, 10% Owner)

View on SEC EDGAR → Open Filing Document →

Form 4 Option exercise Tax / Compensation Filing 2026-05-18

AAMI insider Form 4 filed for equity award, exercise, or tax withholding

Paulson John (Director, 10% Owner) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

The insider converted options into shares. The exercise price was fixed when the options were granted, so the timing usually tracks an expiry schedule.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`M`	Option exercise	5,750	—	—
`M`	Option exercise derivative · Restricted Stock Units	5,750	—	—

Filing: Form 4 (Insider Transaction) Insider: Paulson John (Director, 10% Owner) Shares: 5,750

View on SEC EDGAR → Open Filing Document →

Form 4 Option exercise Tax / Compensation Filing 2026-05-18

AAMI insider Form 4 filed for equity award, exercise, or tax withholding

Chersi Robert J (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

The insider converted options into shares. The exercise price was fixed when the options were granted, so the timing usually tracks an expiry schedule.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`M`	Option exercise	3,286	—	—
`M`	Option exercise derivative · Restricted Stock Units	3,286	—	—

Filing: Form 4 (Insider Transaction) Insider: Chersi Robert J (Director) Shares: 3,286

View on SEC EDGAR → Open Filing Document →

Form 4 Option exercise Tax / Compensation Filing 2026-05-18

AAMI insider Form 4 filed for equity award, exercise, or tax withholding

Trebbi Barbara (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

The insider converted options into shares. The exercise price was fixed when the options were granted, so the timing usually tracks an expiry schedule.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`M`	Option exercise	3,286	—	—
`M`	Option exercise derivative · Restricted Stock Units	3,286	—	—

Filing: Form 4 (Insider Transaction) Insider: Trebbi Barbara (Director) Shares: 3,286

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-05-05

AAMI insider Hart Richard Jonathan (CLO and CAO) sold 100,000 shares (~$6.70M)

Hart Richard Jonathan, listed as CLO and CAO at Acadian Asset Management Inc., reported an open-market sale of 100,000 AAMI shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	88,792	$66.87	$5.94M
`S`	Open-market sale	11,208	$67.73	$759.1K

Filing: Form 4 (Insider Transaction) Insider: Hart Richard Jonathan (CLO and CAO) Shares: 100,000 Est. Value: $6.70M

View on SEC EDGAR → Open Filing Document →

Proposed Insider Sales 4 · Form 144

A Form 144 is a notice of intent to sell restricted or control securities. It is not a record that anything was sold. Acadian Asset Management Inc. has 4 such notices in this period.

The distinction matters because a Form 144 is frequently reported as though it were a completed insider sale. The filer may sell all of the shares covered, some of them, or none at all, and there is no obligation to update the notice either way. A sale that is actually executed by an officer or director shows up separately on a Form 4, which is the filing to check before treating a proposed sale as a real one.

Form 144 Proposed Insider Sale 2026-08-04

AAMI Form 144 filed for proposed insider sale by CHRISTINA WIATER (244 shares) ~$22.5K

CHRISTINA WIATER filed a Form 144 with the SEC indicating intent to sell AAMI (Acadian Asset Management Inc.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: CHRISTINA WIATER Shares: 244 Est. Value: $22.5K

View on SEC EDGAR → Open Filing Document →

Form 144 Proposed Insider Sale 2026-08-03

AAMI Form 144 filed for proposed insider sale by Wiater Christina (25,370 shares) ~$2.21M

Wiater Christina filed a Form 144 with the SEC indicating intent to sell AAMI (Acadian Asset Management Inc.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Wiater Christina Shares: 25,370 Est. Value: $2.21M

View on SEC EDGAR → Open Filing Document →

Form 144 Large Proposed Insider Sale 2026-06-17

AAMI Form 144 filed for proposed insider sale by PAULSON & CO. INC. (1,900,000 shares) ~$157.17M

PAULSON & CO. INC. filed a Form 144 with the SEC indicating intent to sell AAMI (Acadian Asset Management Inc.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4. The proposed dollar value is large enough to merit attention.

Filing: Form 144 (Proposed Sale Notice) Insider: PAULSON & CO. INC. Shares: 1,900,000 Est. Value: $157.17M

View on SEC EDGAR → Open Filing Document →

Form 144 Large Proposed Insider Sale 2026-05-04

AAMI Form 144 filed for proposed insider sale by RICHARD J HART (100,000 shares) ~$6.70M

RICHARD J HART filed a Form 144 with the SEC indicating intent to sell AAMI (Acadian Asset Management Inc.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4. The proposed dollar value is large enough to merit attention.

Filing: Form 144 (Proposed Sale Notice) Insider: RICHARD J HART Shares: 100,000 Est. Value: $6.70M

View on SEC EDGAR → Open Filing Document →

Material Events 4 · Form 8-K

An 8-K reports a material event in the window between scheduled reports. There are 4 in this period for Acadian Asset Management Inc. Each 8-K names the item number it is filed under, and that number is the fastest way to tell a routine disclosure from a consequential one.

Item 2.02 is an earnings release, Item 5.02 is a change of directors or officers, and Item 1.01 or 2.01 covers a material agreement or a completed acquisition. Item 7.01 and Item 8.01 are the general-purpose disclosure items and carry no fixed meaning on their own.

Form 8-K Material Company Update 2026-07-30

AAMI filed 8-K — material company event

Acadian Asset Management Inc. filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

Form 8-K Material Company Update 2026-06-11

AAMI filed 8-K — material company event

Acadian Asset Management Inc. filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

Form 8-K Material Company Update 2026-05-19

AAMI filed 8-K — material company event

Acadian Asset Management Inc. filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

Form 8-K Material Company Update 2026-04-30

AAMI filed 8-K — material company event

Acadian Asset Management Inc. filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

Periodic Reports 3 · Forms 10-K and 10-Q

The periodic reports are where the audited and reviewed financial statements live. This period contains 1 annual report (10-K) and 2 quarterly reports (10-Q) for Acadian Asset Management Inc.

The two are not equivalent in weight. A 10-K is audited by an external firm and includes the full risk factor disclosure, business description and management discussion; a 10-Q is unaudited, reviewed rather than examined, and much shorter. When a figure in a quarterly report is later revised, the annual report is usually where the correction appears.

An amended report — 10-K/A or 10-Q/A — restates or corrects something in the original filing, and is worth reading against the version it replaces.

Form 10-Q Quarterly Report 2026-08-06

AAMI filed Quarterly Report (10-Q)

Acadian Asset Management Inc. filed its quarterly report with the SEC. This report includes unaudited financial statements and management discussion for the quarter.

Filing: 10-Q (Quarterly Report)

View on SEC EDGAR → Open Filing Document →

Form 10-Q Quarterly Report 2026-05-07

AAMI filed Quarterly Report (10-Q)

Acadian Asset Management Inc. filed its quarterly report with the SEC. This report includes unaudited financial statements and management discussion for the quarter.

Filing: 10-Q (Quarterly Report)

View on SEC EDGAR → Open Filing Document →

Form 10-K Annual Report 2026-02-27

AAMI filed Annual Report (10-K)

Acadian Asset Management Inc. filed its annual report with the SEC. This report includes audited financial statements, business overview, risk factors, and management discussion.

Filing: 10-K (Annual Report)

View on SEC EDGAR → Open Filing Document →

How we classify Acadian Asset Management Inc.'s filings

Straight from EDGAR

Each displayed record links to an original source document. StrongBuyAnalytics provides navigation and brief excerpts or summaries, not the filing itself. Parsing may omit context or contain errors, so read the original document in full.

Transaction codes, not guesswork

The nature shown on each insider filing comes from the transaction code the filer entered on the form itself — P for an open-market purchase, A for a compensation award, F for shares withheld to pay tax, M for an option exercise. Where one filing contains several codes, the transaction table lists them line by line.

Why the distinction matters

Insider activity is routinely summarised as buying or selling, which flattens together decisions that mean very different things. Shares withheld for tax on a vesting grant are an automatic administrative step; shares bought on the open market are someone committing their own money at the current price.

What this page does not tell you

A filing records what happened, not why. Form 4 does not always disclose whether a sale was executed under a pre-arranged Rule 10b5-1 plan, and no single filing is a basis for a decision on AAMI. Read these alongside the fundamentals rather than in isolation.

Frequently Asked Questions — AAMI SEC Filings

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AAMI Full Analysis

Publisher, sources & limitations — September 15, 2026. StrongBuyAnalytics provides navigation and brief excerpts or summaries for educational use. Original filings remain at SEC EDGAR or other displayed source links; StrongBuyAnalytics does not author them. Filing dates are source dates, not publication dates for this page. Coverage can be delayed, incomplete, amended, or unavailable because of SEC/source availability, parsing, caching, or outages. Verify every material statement in the original filing.

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