Clients
Blackstone Isg-I Advisors serves 44 clients, 38 of them insurance companies. The average client has about $4.17 billion with the firm.
- Insurance companies38 clients100%
- Pooled investment vehicles6 clients0%
Show client breakdownHide client breakdown
| Client type | Clients | Regulatory AUM | Share | Avg. per client |
|---|---|---|---|---|
| Pooled investment vehicles | 6 | $916,625,227 | 0.5% | $152.8M |
| Insurance companies | 38 | $182,614,524,972 | 99.5% | $4.81B |
| Total | 44 | $183,531,150,199 | 100% | $4.17B |
- Clients
- 6
- Regulatory AUM
- $916,625,227
- Share
- 0.5%
- Avg. per client
- $152.8M
- Clients
- 38
- Regulatory AUM
- $182,614,524,972
- Share
- 99.5%
- Avg. per client
- $4.81B
Total
- Clients
- 44
- Regulatory AUM
- $183,531,150,199
- Share
- 100%
- Avg. per client
- $4.17B
What it does
Blackstone Isg-I Advisors provides portfolio management for pooled vehicles, portfolio management for institutions and selecting other managers. It is paid through a percentage of assets.
Blackstone Isg-I Advisors advises 6 private funds.
100.0% of assets ($183.53B across 44 accounts) are managed with discretion. 48% of clients are outside the U.S., and 0 clients received advice without assets under management last fiscal year.
What the accounts hold
- Funds5%
- Bonds25%
- Investment grade corporate bonds24%
- State and local bonds1%
- Cash5%
- Other65%
- Consists of commercial mortgage loans, resi-loans, abf loans, direct lending, cml, resi, repo, cmbs, rmbs, clo debt, equity/residuals65%
Custodians
Blackstone Isg-I Advisors’ client accounts are held mainly at The Bank of New York Mellon, with 69% of managed assets, and Citibank, N.A., with 28%. Blackstone Isg-I Advisors has custody of $46.8M for 14 clients.
- Citibank, N.A.Citibank, N.A. · New York, NY · $52.07B28%
- The Bank of New York MellonThe Bank of New York Mellon · Ny, NY · $127.18B69%
- BNP ParibasBNP Paribas · Sydney · $3.28B2%
- OtherJ.P. Morgan, All other custodians1%
Ownership and leadership
Blackstone Intermediary Holdco L.L.C. owns 75% or more of Blackstone Isg-I Advisors.
- Owns 75% or more of Blackstone Isg-I Advisors L.L.C.
Blackstone Intermediary Holdco L.L.C.
Control person · since August 2017
- Owns 75% or more of Blackstone Intermediary Holdco L.L.C.
Blackstone Securities Partners L.P.
Control person · since July 2011
- Owns 75% or more of Blackstone Securities Partners L.P.
Blackstone Group Holdings L.P.
Control person · since July 2011
- Owns 75% or more of Blackstone Group Holdings L.P.
Blackstone Holdings I L.P.
Control person · since June 2007
Blackstone Holdings I/II GP L.L.C.
General partner · Control person · since June 2007
- Owns 75% or more of Blackstone Holdings I/II GP L.L.C.
Blackstone Inc.
Control person · since June 2007
Leadership
- William SkinnerChief Financial Officer
- Ida HoghooghiChief Operating Officer
- Panayiota (Toula) BougiamasChief Compliance Officer
- Gilles DellaertGlobal Head of Blackstone Credit and Insurance
- Philip SherrillGlobal Head of Insurance
- Robert YoungGeneral Counsel
Staff
- 114 employees
- 44 in advisory functions
- 20 broker-dealer reps
Fees
Blackstone Isg-I Advisors is paid through a percentage of assets under management.
Blackstone Isg-I Advisors’ fee rates are not included in this profile. Find its brochure on the SEC’s site.
Offices and registrations
Besides its headquarters, Blackstone Isg-I Advisors has 4 offices, with 1 listed address in 1 state.
New York · 1 listed address
- 345 Park Avenue, New YorkHQ
Registration details
- Legal name
- Blackstone Isg-I Advisors L.L.C.
- Headquarters
- 345 Park Avenue, New York, NY 10154
- Phone
- 212-583-5000
- Website
- www.blackstone.com
- SEC file
- 801-111810
- Structure
- Delaware LLC
- Fiscal year end
- December
This directory does not report disciplinary history, for any firm or individual, in either direction. The SEC publishes the complete record, including any disciplinary events, and it is the authoritative place to check one. See this firm's record on adviserinfo.sec.gov
Common questions
How many clients does Blackstone Isg-I Advisors have?
Blackstone Isg-I Advisors has 44 clients and manages $183.5 billion for them, as of March 2026. They include 38 insurance companies and 6 pooled investment vehicles.
Source: Form ADV Part 1A, Items 5.D and 5.F, filed 30 March 2026
What services does Blackstone Isg-I Advisors offer?
Blackstone Isg-I Advisors provides portfolio management for pooled vehicles, portfolio management for institutions and selecting other managers.
Source: Form ADV Part 1A, Item 5.G, from the SEC's 2 October 2026 data file
Which custodians does Blackstone Isg-I Advisors use?
Blackstone Isg-I Advisors’ separately managed account assets are held at The Bank of New York Mellon (Ny, NY), with $127,178,559,689, Citibank, N.A. (New York, NY), with $52,074,328,909, BNP Paribas (Sydney), with $3,276,366,382 and Jpmorgan Chase Bank, National Association (New York, NY), with $91,122,558. Only custodians holding at least a tenth of those assets are named.
Source: Form ADV Part 1A, Schedule D, Section 5.K.(3), filed 30 March 2026
How many financial advisors does Blackstone Isg-I Advisors have?
Blackstone Isg-I Advisors has 0 investment adviser representatives registered with state securities authorities, out of 114 employees, and 44 perform investment advisory functions. 20 are registered representatives of a broker-dealer and 0 are licensed insurance agents.
Source: Form ADV Part 1A, Items 5.A and 5.B, from the SEC's 2 October 2026 data file
What does Blackstone Isg-I Advisors invest in?
At the end of its last fiscal year, Blackstone Isg-I Advisors’ separately managed accounts held 65% consists of commercial mortgage loans, resi-loans, abf loans, direct lending, cml, resi, repo, cmbs, rmbs, clo debt, equity/residuals, 24% investment grade corporate bonds, 5% pooled vehicles (private funds and similar), 5% cash and equivalents and 1% state and local bonds. It advises 6 private funds.
Source: Form ADV Part 1A, Items 5.K.(1) and 7.B, from the SEC's 2 October 2026 data file
Who owns Blackstone Isg-I Advisors?
Blackstone Isg-I Advisors is owned through a chain of holding companies by Blackstone Inc. Its direct owner is Blackstone Intermediary Holdco L.L.C. (75% or more).
Source: Form ADV Part 1A, Schedules A and B, filed 30 March 2026
How does Blackstone Isg-I Advisors get paid?
Blackstone Isg-I Advisors is paid through a percentage of assets under management. Its Form ADV lists no commissions or performance-based fees among how it is paid.
Source: Form ADV Part 1A, Item 5.E, from the SEC's 2 October 2026 data file