Oak Thistle LLC PEN — PENUMBRA INC

Ownership history in Oak Thistle LLC  ·  4 quarters on record

AI Ownership Summary

Oak Thistle LLC reported PENUMBRA INC (PEN) in 4 quarterly 13F filings from 2025 Q2 through 2026 Q2. Peak portfolio weight reached 0.27% in 2026 Q1. The latest visible filing shows PEN at 0.14% 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 PEN ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was Oak Thistle LLC's position in PENUMBRA 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 Q2

PEN was reported at 0.14% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.27% 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
2025 Q2 to 2026 Q2

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.

PEN stock page Oak Thistle LLC fund profile Oak Thistle LLC full holdings
How Oak Thistle LLC held PEN — position size vs. price
% of Fund (quarterly)    PEN price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 4 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q2 REDUCED — — — 4,718 -3,711 -44.0% 0.14% $1.5M 2026-07-21 $317.39
2026 Q1 ADDED — — — 8,429 +6,063 +256.3% 0.27% $2.8M 2026-04-13 $331.48
2025 Q3 ADDED — — — 2,366 +268 +12.8% 0.09% $599K 2025-10-07 $249.04
2025 Q2 INITIATED — — — 2,098 — — 0.08% $538K 2025-08-08 $240.49

🏢 Other funds also holding PEN

As of 2026 Q2 — sorted by position size

EQUITEC PROPRIETARY MARKETS, LLC 3Y 7Y 1.58% EQUITEC PROPRIETARY MARKETS, LLC 3Y 7Y 1.04% ABC ARBITRAGE SA 0.76% J2 Capital Management Inc 3Y 0.36% Linden Thomas Advisory Services, LLC 3Y 0.17% Radnor Capital Management, LLC 3Y 7Y 0.14% Covenant Partners, LLC 3Y 7Y 0.08% Louisiana State Employees Retirement System 3Y 7Y 0.07% Cache Advisors, LLC 0.06% SBI Okasan Asset Management Co.Ltd. 0.06%

FAQ About Oak Thistle LLC and PEN

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

How long has Oak Thistle LLC reported owning PEN?

Oak Thistle LLC reported PEN across 4 quarterly 13F filings, from 2025 Q2 through 2026 Q2.

What was the largest reported PEN position in Oak Thistle LLC's portfolio?

The largest reported portfolio weight for PEN was 0.27% in 2026 Q1.

What is the latest reported PEN position on this page?

The most recent filing on this page is 2026 Q2, when Oak Thistle LLC reported 4,718 shares, equal to 0.14% of portfolio, with an estimated market value of $1.5M.

What does the chart on this PEN ownership page compare?

The chart compares Oak Thistle LLC's quarterly PEN 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 Oak Thistle LLC time their PEN position?

Based on 13F filing dates vs. subsequent PEN price moves, Oak Thistle LLC correctly timed 2 out of 3 reported position changes (67%). The annualised alpha on PEN relative to SPY over the holding period was +12.3%.

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