Bayesian Capital Management, LP BSX — BOSTON SCIENTIFIC CORP

Ownership history in Bayesian Capital Management, LP  ·  26 quarters on record

AI Ownership Summary

Bayesian Capital Management, LP reported BOSTON SCIENTIFIC CORP (BSX) in 26 quarterly 13F filings from 2023 Q4 through 2026 Q1. Peak portfolio weight reached 1.81% in 2026 Q1. The latest visible filing shows BSX at 1.81% 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. Older history is available after unlock; the visible window still shows the most recent pattern.

What this BSX ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was Bayesian Capital Management, LP's position in BOSTON SCIENTIFIC CORP, 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
2026 Q1

BSX was reported at 1.81% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
1.81% in 2026 Q1

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

Time in book
Holding Window
2023 Q4 to 2026 Q1

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.

BSX stock page Bayesian Capital Management, LP fund profile Bayesian Capital Management, LP full holdings
How Bayesian Capital Management, LP held BSX — position size vs. price
% of Fund (quarterly)    BSX price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 8 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 REDUCED — — — 23,600 -31,600 -57.2% 1.81% $1.5M 2026-05-15 $52.68
2025 Q3 ADDED — — — 55,200 +50,300 +1026.5% 1.10% $5.4M 2025-11-14 $102.69
2025 Q1 REDUCED 62.6% +6.5% ❌ 4,900 -8,200 -62.6% 0.08% $494K 2025-05-15 $104.86
2024 Q4 REDUCED 64.4% +12.9% ❌ 13,100 -23,700 -64.4% 0.14% $1.2M 2025-02-14 $106.11
2024 Q3 REDUCED 15.0% +7.0% ❌ 36,800 -6,500 -15.0% 0.36% $3.1M 2024-11-14 $87.59
2024 Q2 REDUCED — — — 43,300 -900 -2.0% 0.38% $3.3M 2024-08-14 $76.42
2024 Q1 REDUCED — — — 44,200 -1,200 -2.6% 0.29% $3.0M 2024-05-15 $74.45
2023 Q4 ADDED — — — 45,400 +22,000 +94.0% 0.28% $2.6M 2024-02-14 $65.95
18 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding BSX

As of 2026 Q1 — sorted by position size

Bollard Group LLC 3Y 7Y 34.26% Bancreek Capital Management, LP 3Y 10.59% Prosight Management, LP 3Y 7Y 8.19% DKRT Investments Corp. 6.92% ECOFI INVESTISSEMENTS SA 5.71% Rhenman & Partners Asset Management AB 3Y 7Y 4.84% Catalio Capital Management, LP 3.92% STONERIDGE INVESTMENT PARTNERS LLC 3Y 7Y 3.76% Ilex Capital Partners (UK) LLP 3.45% Eagle Health Investments LP 3Y 3.22%

FAQ About Bayesian Capital Management, LP and BSX

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

How long has Bayesian Capital Management, LP reported owning BSX?

Bayesian Capital Management, LP reported BSX across 8 quarterly 13F filings, from 2023 Q4 through 2026 Q1.

What was the largest reported BSX position in Bayesian Capital Management, LP's portfolio?

The largest reported portfolio weight for BSX was 1.81% in 2026 Q1.

What is the latest reported BSX position on this page?

The most recent filing on this page is 2026 Q1, when Bayesian Capital Management, LP reported 23,600 shares, equal to 1.81% of portfolio, with an estimated market value of $1.5M.

What does the chart on this BSX ownership page compare?

The chart compares Bayesian Capital Management, LP's quarterly BSX 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 Bayesian Capital Management, LP time their BSX position?

Based on 13F filing dates vs. subsequent BSX price moves, Bayesian Capital Management, LP correctly timed 12 out of 25 reported position changes (48%). The annualised alpha on BSX relative to SPY over the holding period was -9.1%.

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