Walleye Capital LLC BSX — BOSTON SCIENTIFIC CORP

Ownership history in Walleye Capital LLC  ·  54 quarters on record

AI Ownership Summary

Walleye Capital LLC reported BOSTON SCIENTIFIC CORP (BSX) in 54 quarterly 13F filings from 2023 Q4 through 2026 Q1. Peak portfolio weight reached 0.6% in 2025 Q4. The latest visible filing shows BSX at 0.03% 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 Walleye Capital LLC'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 0.03% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.6% in 2025 Q4

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 Walleye Capital LLC fund profile Walleye Capital LLC full holdings
How Walleye Capital LLC 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 30 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 ADDED — — — 112,000 +15,000 +15.5% 0.03% $7.0M 2026-05-11 $53.37
2026 Q1 REDUCED — — — 97,000 -738,952 -88.4% 0.03% $6.1M 2026-05-11 $53.37
2026 Q1 ADDED — — — 835,952 +713,852 +584.6% 0.22% $52.5M 2026-05-11 $53.37
2025 Q4 REDUCED 29.9% -34.2% ✅ 122,100 -52,200 -29.9% 0.04% $11.6M 2026-02-13 $74.73
2025 Q4 REDUCED 91.5% -34.2% ✅ 174,300 -1,867,114 -91.5% 0.05% $16.6M 2026-02-13 $74.73
2025 Q4 ADDED — — — 2,041,414 +1,869,114 +1084.8% 0.60% $194.6M 2026-02-13 $74.73
2025 Q3 REDUCED 77.5% -1.9% ✅ 172,300 -595,145 -77.5% 0.06% $16.8M 2025-11-14 $102.69
2025 Q3 ADDED — — — 767,445 +726,445 +1771.8% 0.28% $74.9M 2025-11-14 $102.69
2025 Q3 REDUCED 62.8% -1.9% ✅ 41,000 -69,300 -62.8% 0.02% $4.0M 2025-11-14 $102.69
2025 Q2 ADDED — — — 110,300 +58,900 +114.6% 0.05% $11.8M 2025-08-13 $102.50
2025 Q2 REDUCED 81.6% -9.7% ✅ 51,400 -228,404 -81.6% 0.02% $5.5M 2025-08-13 $102.50
2025 Q2 ADDED — — — 279,804 +183,504 +190.6% 0.12% $30.1M 2025-08-13 $102.50
2025 Q1 REDUCED 43.3% +6.5% ❌ 96,300 -73,400 -43.3% 0.04% $9.7M 2025-05-14 $102.95
2025 Q1 REDUCED 51.8% +6.5% ❌ 169,700 -182,514 -51.8% 0.08% $17.1M 2025-05-14 $102.95
2025 Q1 ADDED — — — 352,214 +296,714 +534.6% 0.16% $35.5M 2025-05-14 $102.95
2024 Q4 REDUCED 83.7% +12.9% ❌ 55,500 -285,800 -83.7% 0.01% $5.0M 2025-02-13 $106.14
2024 Q4 REDUCED 33.4% +12.9% ❌ 341,300 -170,874 -33.4% 0.07% $30.5M 2025-02-13 $106.14
2024 Q4 ADDED — — — 512,174 +462,074 +922.3% 0.11% $45.7M 2025-02-13 $106.14
2024 Q3 REDUCED 84.5% +7.0% ❌ 50,100 -274,000 -84.5% 0.01% $4.2M 2024-11-14 $87.59
2024 Q3 REDUCED 36.5% +7.0% ❌ 324,100 -186,350 -36.5% 0.06% $27.2M 2024-11-14 $87.59
2024 Q3 ADDED — — — 510,450 +117,050 +29.8% 0.09% $42.8M 2024-11-14 $87.59
2024 Q2 REDUCED 17.3% +8.8% ❌ 393,400 -82,281 -17.3% 0.05% $30.3M 2024-08-14 $76.42
2024 Q2 ADDED — — — 475,681 +413,681 +667.2% 0.07% $36.6M 2024-08-14 $76.42
2024 Q2 REDUCED 85.5% +8.8% ❌ 62,000 -364,397 -85.5% 0.01% $4.8M 2024-08-14 $76.42
2024 Q1 ADDED — — — 426,397 +338,897 +387.3% 0.05% $29.2M 2024-05-15 $74.45
2024 Q1 REDUCED 81.9% +11.6% ❌ 87,500 -395,100 -81.9% 0.01% $6.0M 2024-05-15 $74.45
2024 Q1 REDUCED — — — 482,600 -1,293 -0.3% 0.06% $33.1M 2024-05-15 $74.45
2023 Q4 ADDED — — — 483,893 +104,493 +27.5% 0.06% $28.0M 2024-02-14 $65.95
2023 Q4 ADDED — — — 379,400 +245,100 +182.5% 0.05% $21.9M 2024-02-14 $65.95
2023 Q4 REDUCED 48.6% +17.8% ❌ 134,300 -126,900 -48.6% 0.02% $7.8M 2024-02-14 $65.95
24 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 Walleye Capital LLC and BSX

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

How long has Walleye Capital LLC reported owning BSX?

Walleye Capital LLC reported BSX across 30 quarterly 13F filings, from 2023 Q4 through 2026 Q1.

What was the largest reported BSX position in Walleye Capital LLC's portfolio?

The largest reported portfolio weight for BSX was 0.60% in 2025 Q4.

What is the latest reported BSX position on this page?

The most recent filing on this page is 2026 Q1, when Walleye Capital LLC reported 112,000 shares, equal to 0.03% of portfolio, with an estimated market value of $7.0M.

What does the chart on this BSX ownership page compare?

The chart compares Walleye Capital LLC'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 Walleye Capital LLC time their BSX position?

Based on 13F filing dates vs. subsequent BSX price moves, Walleye Capital LLC correctly timed 29 out of 53 reported position changes (55%). The annualised alpha on BSX relative to SPY over the holding period was -8.2%.

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