ESSEX INVESTMENT MANAGEMENT CO LLC AMPG — AMPLITECH GROUP INC

Ownership history in ESSEX INVESTMENT MANAGEMENT CO LLC  ·  6 quarters on record

AI Ownership Summary

ESSEX INVESTMENT MANAGEMENT CO LLC reported AMPLITECH GROUP INC (AMPG) in 6 quarterly 13F filings from 2025 Q1 through 2026 Q2. Peak portfolio weight reached 0.06% in 2026 Q2. The latest visible filing shows AMPG at 0.06% 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 AMPG ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was ESSEX INVESTMENT MANAGEMENT CO LLC's position in AMPLITECH GROUP 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

AMPG was reported at 0.06% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.06% in 2026 Q2

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

Time in book
Holding Window
2025 Q1 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.

AMPG stock page ESSEX INVESTMENT MANAGEMENT CO LLC fund profile ESSEX INVESTMENT MANAGEMENT CO LLC full holdings
How ESSEX INVESTMENT MANAGEMENT CO LLC held AMPG — position size vs. price
% of Fund (quarterly)    AMPG price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 6 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q2 REDUCED — — — 60,526 -27,314 -31.1% 0.06% $421K 2026-08-06 $5.43
2026 Q1 UNCHANGED — — — 87,840 — 0% 0.03% $167K 2026-05-11 $2.68
2025 Q4 ADDED — — — 87,840 +18,523 +26.7% 0.04% $263K 2026-02-13 $2.70
2025 Q3 UNCHANGED — — — 69,317 — 0% 0.04% $270K 2025-11-06 $3.13
2025 Q2 ADDED — — — 69,317 +10,650 +18.2% 0.03% $147K 2025-08-12 $3.40
2025 Q1 INITIATED — — — 58,667 — — 0.02% $91K 2025-05-07 $1.73

🏢 Other funds also holding AMPG

As of 2026 Q2 — sorted by position size

EQUITEC PROPRIETARY MARKETS, LLC 3Y 7Y 0.31% FNY Investment Advisers, LLC 3Y 7Y 0.23% Midwest Financial Group LLC 3Y 0.07% Walser Wealth Management Company, A Ltd Liability Co 0.05% EQUITEC PROPRIETARY MARKETS, LLC 3Y 7Y 0.04% Caitong International Asset Management Co., Ltd 0.03% PFG Investments, LLC 3Y 0.03% Legato Capital Management LLC 3Y 7Y 0.01% Bryn Mawr Trust Advisors, LLC 3Y 7Y 0.0% EQUITEC PROPRIETARY MARKETS, LLC 3Y 7Y 0.0%

FAQ About ESSEX INVESTMENT MANAGEMENT CO LLC and AMPG

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

How long has ESSEX INVESTMENT MANAGEMENT CO LLC reported owning AMPG?

ESSEX INVESTMENT MANAGEMENT CO LLC reported AMPG across 6 quarterly 13F filings, from 2025 Q1 through 2026 Q2.

What was the largest reported AMPG position in ESSEX INVESTMENT MANAGEMENT CO LLC's portfolio?

The largest reported portfolio weight for AMPG was 0.06% in 2026 Q2.

What is the latest reported AMPG position on this page?

The most recent filing on this page is 2026 Q2, when ESSEX INVESTMENT MANAGEMENT CO LLC reported 60,526 shares, equal to 0.06% of portfolio, with an estimated market value of $421K.

What does the chart on this AMPG ownership page compare?

The chart compares ESSEX INVESTMENT MANAGEMENT CO LLC's quarterly AMPG 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 ESSEX INVESTMENT MANAGEMENT CO LLC time their AMPG position?

Based on 13F filing dates vs. subsequent AMPG price moves, ESSEX INVESTMENT MANAGEMENT CO LLC correctly timed 1 out of 3 reported position changes (33%). The annualised alpha on AMPG relative to SPY over the holding period was +92.1%.

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