Conestoga Capital Advisors, LLC RGEN — REPLIGEN CORP

Ownership history in Conestoga Capital Advisors, LLC  ·  48 quarters on record

AI Ownership Summary

Conestoga Capital Advisors, LLC reported REPLIGEN CORP (RGEN) in 48 quarterly 13F filings from 2023 Q4 through 2026 Q1. Peak portfolio weight reached 2.92% in 2025 Q4. The latest visible filing shows RGEN at 2.58% 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 RGEN ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was Conestoga Capital Advisors, LLC's position in REPLIGEN 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

RGEN was reported at 2.58% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
2.92% 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.

RGEN stock page Conestoga Capital Advisors, LLC fund profile Conestoga Capital Advisors, LLC full holdings
How Conestoga Capital Advisors, LLC held RGEN — position size vs. price
% of Fund (quarterly)    RGEN 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 ADDED — — — 1,097,783 +39,808 +3.8% 2.58% $129.3M 2026-04-24 $117.60
2025 Q4 ADDED — — — 1,057,975 +101,062 +10.6% 2.92% $173.4M 2026-02-02 $151.12
2025 Q3 REDUCED — — — 956,913 -19,994 -2.0% 2.05% $127.9M 2025-10-24 $166.33
2025 Q2 REDUCED — — — 976,907 -3,340 -0.3% 1.80% $121.5M 2025-07-30 $122.85
2025 Q1 ADDED — — — 980,247 +32,665 +3.4% 1.88% $124.7M 2025-04-17 $130.00
2024 Q4 ADDED — — — 947,582 +6,872 +0.7% 1.81% $136.4M 2025-01-24 $165.89
2024 Q3 REDUCED — — — 940,710 -6,167 -0.7% 1.90% $140.0M 2024-10-28 $137.21
2024 Q2 ADDED — — — 946,877 +199,322 +26.7% 1.79% $119.4M 2024-07-26 $140.79
2024 Q1 ADDED — — — 747,555 +37,817 +5.3% 1.99% $137.5M 2024-04-26 $166.58
2023 Q4 ADDED — — — 709,738 +2,590 +0.4% 1.91% $127.6M 2024-01-26 $193.40
38 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding RGEN

As of 2026 Q1 — sorted by position size

12 West Capital Management LP 3Y 7Y 3.8% Vestal Point Capital, LP 3.05% Roubaix Capital, LLC 3Y 7Y 3.0% BROWN CAPITAL MANAGEMENT LLC 3Y 7Y 2.85% Blue Whale Capital LLP 3Y 2.26% AMERICAN CAPITAL MANAGEMENT INC 3Y 7Y 2.26% Avidity Partners Management LP 3Y 2.08% MAVERICK CAPITAL LTD 3Y 7Y 2.06% UNITED CAPITAL FINANCIAL ADVISORS, LLC 3Y 7Y 2.01% KELLY LAWRENCE W & ASSOCIATES INC/CA 3Y 7Y 1.78%

FAQ About Conestoga Capital Advisors, LLC and RGEN

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

How long has Conestoga Capital Advisors, LLC reported owning RGEN?

Conestoga Capital Advisors, LLC reported RGEN across 10 quarterly 13F filings, from 2023 Q4 through 2026 Q1.

What was the largest reported RGEN position in Conestoga Capital Advisors, LLC's portfolio?

The largest reported portfolio weight for RGEN was 2.92% in 2025 Q4.

What is the latest reported RGEN position on this page?

The most recent filing on this page is 2026 Q1, when Conestoga Capital Advisors, LLC reported 1,097,783 shares, equal to 2.58% of portfolio, with an estimated market value of $129.3M.

What does the chart on this RGEN ownership page compare?

The chart compares Conestoga Capital Advisors, LLC's quarterly RGEN 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 Conestoga Capital Advisors, LLC time their RGEN position?

Based on 13F filing dates vs. subsequent RGEN price moves, Conestoga Capital Advisors, LLC correctly timed 24 out of 47 reported position changes (51%).

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