MBB PUBLIC MARKETS I LLC BX — BLACKSTONE INC

Ownership history in MBB PUBLIC MARKETS I LLC  ·  13 quarters on record

AI Ownership Summary

MBB PUBLIC MARKETS I LLC reported BLACKSTONE INC (BX) in 13 quarterly 13F filings from 2024 Q1 through 2025 Q3. Peak portfolio weight reached 0.36% in 2024 Q1. The latest visible filing shows BX at 0.02% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings.

What this BX ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was MBB PUBLIC MARKETS I LLC's position in BLACKSTONE INC, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2025 Q3

BX was reported at 0.02% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.36% in 2024 Q1

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2024 Q1 to 2025 Q3

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

BX stock page MBB PUBLIC MARKETS I LLC fund profile MBB PUBLIC MARKETS I LLC full holdings
How MBB PUBLIC MARKETS I LLC held BX — position size vs. price
% of Fund (quarterly)    BX price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 13 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2025 Q3 REDUCED 12.8% -8.4% ✅ 698 -102 -12.8% 0.02% $119K 2025-11-14 $138.53
2025 Q3 UNCHANGED — — — 800 — 0% 0.02% $137K 2025-11-14 $138.53
2025 Q2 REDUCED 53.2% +18.5% ❌ 800 -909 -53.2% 0.01% $120K 2025-08-14 $169.58
2025 Q2 REDUCED 19.1% +18.5% ❌ 1,709 -404 -19.1% 0.02% $256K 2025-08-14 $169.58
2025 Q1 ADDED — — — 2,113 +1,313 +164.1% 0.04% $295K 2025-05-15 $141.61
2025 Q1 REDUCED 92.6% +7.8% ❌ 800 -10,000 -92.6% 0.01% $112K 2025-05-15 $141.61
2024 Q4 ADDED — — — 10,800 +8,370 +344.4% 0.17% $1.9M 2025-02-14 $157.95
2024 Q3 UNCHANGED — — — 2,430 — 0% 0.02% $372K 2024-11-14 $172.17
2024 Q3 REDUCED 96.2% +12.9% ❌ 2,430 -62,270 -96.2% 0.02% $372K 2024-11-14 $172.17
2024 Q2 ADDED — — — 64,700 +14,390 +28.6% 0.16% $8.0M 2024-08-14 $128.70
2024 Q2 ADDED — — — 50,310 +47,017 +1427.8% 0.13% $6.2M 2024-08-14 $128.70
2024 Q1 REDUCED 92.6% -6.3% ✅ 3,293 -41,407 -92.6% 0.03% $433K 2024-05-15 $123.40
2024 Q1 INITIATED — — — 44,700 — — 0.36% $5.9M 2024-05-15 $123.40

🏢 Other funds also holding BX

As of 2026 Q1 — sorted by position size

John & Kathleen Schreiber Foundation 3Y 80.13% WALNUT PRIVATE EQUITY PARTNERS, LLC 3Y 7Y 23.08% KIDS CAPITAL MANAGEMENT, L.P. 3Y 12.51% Highlander Partners, L.P. 3Y 10.74% Cryder Capital Partners LLP 3Y 7Y 10.45% Enstar Group LTD 3Y 8.7% ACCOUNT MANAGEMENT LLC 3Y 7Y 8.48% Coalescence Partners Investment Management, LP 8.12% GARRISON BRADFORD & ASSOCIATES INC 3Y 7Y 7.98% Heard Capital LLC 3Y 7.33%

FAQ About MBB PUBLIC MARKETS I LLC and BX

These are the practical questions this page is built to answer before you even open the full history table.

How long has MBB PUBLIC MARKETS I LLC reported owning BX?

MBB PUBLIC MARKETS I LLC reported BX across 13 quarterly 13F filings, from 2024 Q1 through 2025 Q3.

What was the largest reported BX position in MBB PUBLIC MARKETS I LLC's portfolio?

The largest reported portfolio weight for BX was 0.36% in 2024 Q1.

What is the latest reported BX position on this page?

The most recent filing on this page is 2025 Q3, when MBB PUBLIC MARKETS I LLC reported 698 shares, equal to 0.02% of portfolio, with an estimated market value of $119K.

What does the chart on this BX ownership page compare?

The chart compares MBB PUBLIC MARKETS I LLC's quarterly BX portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

How well did MBB PUBLIC MARKETS I LLC time their BX position?

Based on 13F filing dates vs. subsequent BX price moves, MBB PUBLIC MARKETS I LLC correctly timed 6 out of 10 reported position changes (60%). The annualised alpha on BX relative to SPY over the holding period was -8.9%.

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