Advisor Os Llc

SEC-registered Investment Adviser · Mid-sized ($1B–$10B) CRD 287792 · SEC file 801-110639 · Chicago, IL · WWW.ADVISOR-OS.COM

☆ Save with Pro ADV data as of Mar 31, 2026

Regulatory AUM: $5.1B
Discretionary: $1.8B
Clients: 12
Avg AUM / client: $424M
Accounts: 12
Employees: 2

AUM over time

$0 $5.1B

May 2017 Dec 2025

Annual snapshots from Form ADV filings · as of Mar 31, 2026

Investments (13F portfolio — 571 positions, $1,381,209,406)

13F period Mar 31, 2026

#	Issuer	Class	Value	Shares	% of 13F	% of AUM
1	Vanguard Index Fds	S&P 500 ETF SHS	$97,064,690	162,438	7.03%	1.91%
2	Vanguard Specialized Funds	DIV APP ETF	$59,429,468	276,339	4.3%	1.17%
3	Janus Detroit Str Tr	HENDRSON AAA CL	$59,348,380	1,178,248	4.3%	1.17%
4	Pimco Etf Tr	ENHAN SHRT MA AC	$57,270,165	569,456	4.15%	1.12%
5	T Rowe Price Etf Inc	PRICE BLUE CHIP	$48,171,250	1,090,341	3.49%	0.95%
6	Blackrock Etf Trust Ii	ISHARES FLEXIBLE	$46,651,040	898,345	3.38%	0.92%
7	Apple Inc	COM	$42,849,240	168,937	3.1%	0.84%
8	Dimensional Etf Trust	INTL CORE EQUITY	$33,638,907	946,775	2.44%	0.66%
9	Bny Mellon Etf Trust Ii	DYNAMIC VALUE	$33,202,291	1,119,430	2.4%	0.65%
10	Northrop Grumman Corp	COM	$33,130,832	48,562	2.4%	0.65%
11	Nvidia Corporation	COM	$25,777,389	147,806	1.87%	0.51%
12	Vanguard Tax Managed Fds	VAN FTSE DEV MKT	$23,104,719	360,560	1.67%	0.45%
13	Ishares Tr	RUS 1000 GRW ETF	$19,705,816	46,215	1.43%	0.39%
14	Invesco Exchange Traded Fd T	S&P500 EQL WGT	$18,181,614	94,735	1.32%	0.36%
15	Spdr Series Trust	STATE STREET SPD	$18,166,395	237,345	1.32%	0.36%
16	Harbor Etf Trust	HARBOR COMMODITY	$17,791,398	573,731	1.29%	0.35%
17	Spdr Series Trust	STATE STREET SPD	$17,636,356	688,382	1.28%	0.35%
18	Vanguard Index Fds	TOTAL STK MKT	$17,471,351	54,460	1.26%	0.34%
19	Schwab Strategic Tr	GOVERNMENT MONEY	$17,451,902	173,271	1.26%	0.34%
20	Microsoft Corp	COM	$15,906,343	42,970	1.15%	0.31%
21	Spdr Series Trust	STATE STREET SPD	$13,119,989	143,169	0.95%	0.26%
22	American Centy Etf Tr	US SML CP VALU	$12,739,956	115,325	0.92%	0.25%
23	Pimco Etf Tr	MULTISECTOR BD	$12,305,628	469,680	0.89%	0.24%
24	Vanguard Scottsdale Fds	VNG RUS1000VAL	$12,210,769	130,262	0.88%	0.24%
25	State Str Spdr S&P 500 Etf T	TR UNIT	$11,923,756	18,335	0.86%	0.23%

Top 25 of 571 positions from the manager's latest Form 13F · source filing (EDGAR) ↗. 13F covers long US-listed positions only. "% of AUM" is share of the firm's total regulatory AUM (Form ADV Item 5.F).

Who they serve

Client type	Clients	AUM	% of AUM
Other investment advisers	12	$5.1B	100.0%

People (2)

roster as of Jul 20, 2026

Name	Role / title	Credentials	With firm since	Ownership
Joseph David Taiber	Managing Member	CFA	Jan 2017 (10y)	50% – 75%
Phillip John Kosmala	Managing Member And Chief Compliance Officer	CFA	Jan 2017 (10y)	50% – 75%

Roster from the IAPD representatives feed; ownership and acquisition dates from Form ADV Schedule A/B. "Since" is the earliest filed registration or acquisition date.

Documents (1 archived)

Form	Period	Size
Form ADV (full filing)	03/31/2026	1.03 MB	View · PDF · Source ↗

Archived copies of the firm's regulatory filings, versioned by content hash.

Disciplinary disclosures

No disciplinary events reported on the firm's latest Form ADV filing.

How they charge

• Percentage of assets under management

Services

• Portfolio management for individuals/small businesses
• Portfolio management for businesses/institutional clients
• Selection of other advisers

Custody

Reported custodians

Charles Schwab & Co. $5.1B (100% of AUM) Mar 2026

Amounts as reported in ADV Item 5.K.(3) (custodians holding 10%+ of SMA assets).

Firm reports it does not have custody of client funds or securities (Item 9.A).

Source

All data on this page comes from this firm's Form ADV filings, reproduced without modification. Latest filing: Mar 31, 2026.

View current Form ADV (SEC/IAPD) ↗