CHECK CAPITAL MANAGEMENT INC/CA TRUP — Trupanion Inc.

Ownership history in CHECK CAPITAL MANAGEMENT INC/CA  ·  33 quarters on record

AI Ownership Summary

CHECK CAPITAL MANAGEMENT INC/CA reported Trupanion Inc. (TRUP) in 33 quarterly 13F filings from 2023 Q4 through 2026 Q1. Peak portfolio weight reached 0.08% in 2025 Q2. The latest visible filing shows TRUP 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 TRUP ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was CHECK CAPITAL MANAGEMENT INC/CA's position in Trupanion 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

TRUP was reported at 0.03% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.08% 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
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.

TRUP stock page CHECK CAPITAL MANAGEMENT INC/CA fund profile CHECK CAPITAL MANAGEMENT INC/CA full holdings
How CHECK CAPITAL MANAGEMENT INC/CA held TRUP — position size vs. price
% of Fund (quarterly)    TRUP price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 10 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 REDUCED — — — 40,695 -85 -0.2% 0.03% $1.0M 2026-05-04 $26.36
2025 Q4 REDUCED — — — 40,780 -200 -0.5% 0.04% $1.5M 2026-02-06 $33.17
2025 Q3 REDUCED — — — 40,980 -2,100 -4.9% 0.06% $1.8M 2025-11-06 $42.09
2025 Q2 ADDED — — — 43,080 +760 +1.8% 0.08% $2.4M 2025-07-25 $49.81
2025 Q1 ADDED — — — 42,320 +1,435 +3.5% 0.05% $1.6M 2025-05-02 $45.00
2024 Q4 REDUCED — — — 40,885 -575 -1.4% 0.06% $2.0M 2025-01-30 $47.87
2024 Q3 ADDED — — — 41,460 +1,100 +2.7% 0.05% $1.7M 2024-11-06 $50.21
2024 Q2 ADDED — — — 40,360 +8,005 +24.7% 0.04% $1.2M 2024-07-25 $34.38
2024 Q1 ADDED — — — 32,355 +8,355 +34.8% 0.03% $893K 2024-04-19 $22.45
2023 Q4 ADDED — — — 24,000 +1,075 +4.7% 0.03% $732K 2024-01-31 $27.20
23 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding TRUP

As of 2026 Q1 — sorted by position size

AFLAC INC 3Y 98.28% Kopion Asset Management, LLC 3Y 7.97% GREENLEA LANE CAPITAL MANAGEMENT, LLC 3Y 7Y 5.78% RENAISSANCERE HOLDINGS LTD 1.66% Lagoda Investment Management, L.P. 3Y 7Y 1.56% Blueshift Asset Management, LLC 3Y 7Y 0.37% Hosking Partners LLP 3Y 7Y 0.28% Dynamic Technology Lab Private Ltd 3Y 7Y 0.24% Optimize Financial Inc 0.22% CONNORS INVESTOR SERVICES INC 3Y 7Y 0.17%

FAQ About CHECK CAPITAL MANAGEMENT INC/CA and TRUP

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

How long has CHECK CAPITAL MANAGEMENT INC/CA reported owning TRUP?

CHECK CAPITAL MANAGEMENT INC/CA reported TRUP across 10 quarterly 13F filings, from 2023 Q4 through 2026 Q1.

What was the largest reported TRUP position in CHECK CAPITAL MANAGEMENT INC/CA's portfolio?

The largest reported portfolio weight for TRUP was 0.08% in 2025 Q2.

What is the latest reported TRUP position on this page?

The most recent filing on this page is 2026 Q1, when CHECK CAPITAL MANAGEMENT INC/CA reported 40,695 shares, equal to 0.03% of portfolio, with an estimated market value of $1.0M.

What does the chart on this TRUP ownership page compare?

The chart compares CHECK CAPITAL MANAGEMENT INC/CA's quarterly TRUP 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 CHECK CAPITAL MANAGEMENT INC/CA time their TRUP position?

Based on 13F filing dates vs. subsequent TRUP price moves, CHECK CAPITAL MANAGEMENT INC/CA correctly timed 17 out of 32 reported position changes (53%). The annualised alpha on TRUP relative to SPY over the holding period was -12.7%.

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