First Turn Management, LLC INSM — INSMED INC

Ownership history in First Turn Management, LLC  ·  8 quarters on record

AI Ownership Summary

First Turn Management, LLC reported INSMED INC (INSM) in 8 quarterly 13F filings from 2024 Q2 through 2026 Q1. Peak portfolio weight reached 7.0% in 2025 Q2. The latest visible filing shows INSM at 4.54% 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 INSM ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was First Turn Management, LLC's position in INSMED 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
2026 Q1

INSM was reported at 4.54% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
7.0% in 2025 Q2

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

Time in book
Holding Window
2024 Q2 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.

INSM stock page First Turn Management, LLC fund profile First Turn Management, LLC full holdings
How First Turn Management, LLC held INSM — position size vs. price
% of Fund (quarterly)    INSM 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 — — — 248,475 -15,818 -6.0% 4.54% $40.6M 2026-05-15 $109.14
2025 Q4 REDUCED 17.3% -6.0% ✅ 264,293 -55,480 -17.3% 5.26% $46.0M 2026-02-13 $148.75
2025 Q3 REDUCED 14.2% +22.4% ❌ 319,773 -52,899 -14.2% 6.91% $46.1M 2025-11-14 $193.22
2025 Q2 REDUCED 7.2% +40.8% ❌ 372,672 -28,957 -7.2% 7.00% $37.5M 2025-08-14 $127.75
2025 Q1 REDUCED 10.1% +31.9% ❌ 401,629 -45,351 -10.1% 6.18% $30.6M 2025-05-15 $67.22
2024 Q4 ADDED — — — 446,980 +90,529 +25.4% 5.53% $30.9M 2025-02-14 $79.31
2024 Q3 ADDED — — — 356,451 +33,091 +10.2% 4.12% $26.0M 2024-11-07 $71.69
2024 Q2 INITIATED — — — 323,360 — — 3.52% $21.7M 2024-08-08 $71.81

🏢 Other funds also holding INSM

As of 2026 Q1 — sorted by position size

Darwin Global Management, Ltd. 3Y 68.33% Artia Global Partners LP 3Y 20.59% Integral Health Asset Management, LLC 3Y 11.73% Palo Alto Investors LP 3Y 7Y 10.39% NWI MANAGEMENT LP 3Y 7Y 9.43% Artia Global Partners LP 3Y 9.16% Davern Capital Partners, LP 8.19% RTW INVESTMENTS, LP 3Y 7Y 7.88% BAKER BROS. ADVISORS LP 3Y 7Y 6.97% Eagle Health Investments LP 3Y 6.41%

FAQ About First Turn Management, LLC and INSM

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

How long has First Turn Management, LLC reported owning INSM?

First Turn Management, LLC reported INSM across 8 quarterly 13F filings, from 2024 Q2 through 2026 Q1.

What was the largest reported INSM position in First Turn Management, LLC's portfolio?

The largest reported portfolio weight for INSM was 7.00% in 2025 Q2.

What is the latest reported INSM position on this page?

The most recent filing on this page is 2026 Q1, when First Turn Management, LLC reported 248,475 shares, equal to 4.54% of portfolio, with an estimated market value of $40.6M.

What does the chart on this INSM ownership page compare?

The chart compares First Turn Management, LLC's quarterly INSM 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 First Turn Management, LLC time their INSM position?

Based on 13F filing dates vs. subsequent INSM price moves, First Turn Management, LLC correctly timed 3 out of 7 reported position changes (43%). The annualised alpha on INSM relative to SPY over the holding period was +3.8%.

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