BLAIR WILLIAM & CO/IL ISRG — INTUITIVE SURGICAL INC COM

Ownership history in BLAIR WILLIAM & CO/IL  ·  78 quarters on record

AI Ownership Summary

BLAIR WILLIAM & CO/IL reported INTUITIVE SURGICAL INC COM (ISRG) in 78 quarterly 13F filings from 2023 Q4 through 2025 Q4. Peak portfolio weight reached 0.71% in 2024 Q4. The latest visible filing shows ISRG at 0.67% 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 ISRG ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was BLAIR WILLIAM & CO/IL's position in INTUITIVE SURGICAL INC COM, 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 Q4

ISRG was reported at 0.67% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.71% in 2024 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 2025 Q4

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.

ISRG stock page BLAIR WILLIAM & CO/IL fund profile BLAIR WILLIAM & CO/IL full holdings
How BLAIR WILLIAM & CO/IL held ISRG — position size vs. price
% of Fund (quarterly)    ISRG price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 9 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2025 Q4 REDUCED — — — 439,370 -18,636 -4.1% 0.67% $248.8M 2026-02-14 (Est.) $485.84
2025 Q3 REDUCED — — — 458,006 -8,017 -1.7% 0.55% $204.8M 2025-11-12 $572.45
2025 Q2 REDUCED — — — 466,023 -7,393 -1.6% 0.70% $253.2M 2025-07-24 $488.61
2025 Q1 ADDED — — — 473,416 +4,536 +1.0% 0.71% $234.5M 2025-05-09 $536.51
2024 Q4 ADDED — — — 468,880 +4,101 +0.9% 0.71% $244.7M 2025-02-12 $589.61
2024 Q3 REDUCED — — — 464,779 -7,463 -1.6% 0.67% $228.3M 2024-11-12 $537.07
2024 Q2 ADDED — — — 472,242 +23,667 +5.3% 0.65% $210.1M 2024-08-12 $465.53
2024 Q1 ADDED — — — 448,575 +52,693 +13.3% 0.56% $179.0M 2024-05-09 $385.45
2023 Q4 ADDED — — — 395,882 +18,511 +4.9% 0.46% $133.6M 2024-02-12 $382.13
69 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding ISRG

As of 2026 Q1 — sorted by position size

BENDER ROBERT & ASSOCIATES 3Y 7Y 7.59% Westwind Capital 3Y 7Y 5.83% Seilern Investment Management Ltd 5.41% Robocap Asset Management Ltd 5.32% KIECKHEFER GROUP LLC 5.2% BOURNE LENT ASSET MANAGEMENT INC 3Y 7Y 4.53% BSN Capital Partners Ltd 3Y 4.33% McBroom & Associates, LLC 3Y 4.3% James Hambro & Partners LLP 3Y 7Y 4.22% Orange Investment Advisors, Inc. 3Y 7Y 3.93%

FAQ About BLAIR WILLIAM & CO/IL and ISRG

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

How long has BLAIR WILLIAM & CO/IL reported owning ISRG?

BLAIR WILLIAM & CO/IL reported ISRG across 9 quarterly 13F filings, from 2023 Q4 through 2025 Q4.

What was the largest reported ISRG position in BLAIR WILLIAM & CO/IL's portfolio?

The largest reported portfolio weight for ISRG was 0.71% in 2024 Q4.

What is the latest reported ISRG position on this page?

The most recent filing on this page is 2025 Q4, when BLAIR WILLIAM & CO/IL reported 439,370 shares, equal to 0.67% of portfolio, with an estimated market value of $248.8M.

What does the chart on this ISRG ownership page compare?

The chart compares BLAIR WILLIAM & CO/IL's quarterly ISRG 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 BLAIR WILLIAM & CO/IL time their ISRG position?

Based on 13F filing dates vs. subsequent ISRG price moves, BLAIR WILLIAM & CO/IL correctly timed 38 out of 75 reported position changes (51%). The annualised alpha on ISRG relative to SPY over the holding period was +3.7%.

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