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Analyst Tracker/Thomas Diffely
DAD
Thomas Diffely
Wall Street Analyst
★★★★☆
#259
on 13Foresight · ranked by our own returns
67%
Success Rate
+43.5%
Average Return
18 of 27 calls profitable · +27.3% vs benchmark
🔒 5-year track record is Pro. Showing 1-year — upgrade.
📈 Across the calls we could measure, roughly 67% of Thomas Diffely's ratings turned a profit when each position was held for 1 year — averaging +43.5% per rating. These figures are computed by 13Foresight from historical prices, not supplied by the analyst.

Rating Distribution

11 Buy 0 Hold 0 Sell
Thomas's Stock Coverage 27 ratings · 2026-06-18
Company Date Position Consensus Price Target 1-Yr Return
PLAB
Photronics
Dec 11, 2025 BUY Buy
+9.7% avg upside
6 analysts
$45.00
45.13% Upside
-23.3%
ACLS
Axcelis Technologies
Nov 05, 2025 BUY Strong Buy
-27.2% avg upside
10 analysts
$110.00
37.36% Downside
+113.3%
ICHR
Ichor Holdings
Nov 04, 2025 BUY Strong Buy
-43.6% avg upside
12 analysts
$30.00
66.38% Downside
+365.8%
FORM
Formfactor
Oct 30, 2025 BUY Strong Buy
-25.1% avg upside
15 analysts
$55.00
60.78% Downside
+152.4%
AMKR
Amkor
Oct 28, 2025 BUY Buy
-41.1% avg upside
14 analysts
$40.00
53.75% Downside
+121.6%
KLIC
Kulicke & Soffa
Aug 07, 2025 BUY Buy
-40.6% avg upside
6 analysts
+184.8%
PDFS
PDF Solutions
Feb 08, 2024 BUY Strong Buy
-31.3% avg upside
7 analysts
-16.8%
LIDR
AEye Inc
Mar 16, 2023 HOLD Strong Buy
+776.2% avg upside
5 analysts
$30.00
1829.24% Upside
-91.4%
COHU
Cohu
Feb 17, 2023 HOLD Strong Buy
-15.6% avg upside
12 analysts
-8.2%
LASR
nLIGHT
Jan 20, 2023 HOLD Strong Buy
+6.6% avg upside
13 analysts
+9.2%
AEIS
Advanced Energy
Jan 20, 2023 HOLD Strong Buy
-3.5% avg upside
17 analysts
+15.4%
AMAT
Applied Materials
Jan 20, 2023 HOLD Strong Buy
-39.7% avg upside
52 analysts
+54.6%
IPGP
IPG Photonics
Jan 20, 2023 HOLD Buy
+20.2% avg upside
16 analysts
-8.3%
LRCX
Lam Research
Jan 20, 2023 HOLD Strong Buy
-24.7% avg upside
43 analysts
+77.0%
TER
Teradyne
Jan 20, 2023 HOLD Strong Buy
-32.6% avg upside
26 analysts
+12.0%
MKSI
MKS
Nov 04, 2022 BUY Strong Buy
-22.4% avg upside
19 analysts
$90.00
75.78% Downside
+2.8%
UCTT
Ultra Clean Holdings
Apr 28, 2022 BUY Strong Buy
-27.0% avg upside
8 analysts
$65.00
41.70% Downside
-11.3%
SNPS
Synopsys
Dec 02, 2021 BUY Strong Buy
+11.2% avg upside
26 analysts
$400.00
13.46% Downside
-0.4%
LITE
Lumentum Holdings
May 13, 2021 BUY Strong Buy
-9.5% avg upside
27 analysts
$95.00
89.02% Downside
+33.6%
CDNS
Cadence Design
Apr 27, 2021 BUY Strong Buy
-21.9% avg upside
26 analysts
$165.00
57.73% Downside
+15.6%
ONTO
Onto Innovation
Apr 01, 2021 BUY Strong Buy
-27.0% avg upside
16 analysts
$80.00
74.83% Downside
+21.3%
COHR
Coherent Corp
Feb 10, 2021 BUY Strong Buy
-34.0% avg upside
33 analysts
$115.00
69.70% Downside
-27.6%
AAOI
Applied Optoelectronics
Aug 07, 2020 HOLD Buy
-47.7% avg upside
13 analysts
$17.00
89.76% Downside
-54.8%
VERI
Veritone
Jul 09, 2020 BUY Buy
+578.9% avg upside
14 analysts
$15.00
934.52% Upside
+20.3%
QRVO
Qorvo
Aug 05, 2019 HOLD Hold
+8.1% avg upside
36 analysts
$74.00
21.86% Downside
+96.1%
AVGO
Broadcom
Jun 14, 2019 BUY Strong Buy
+9.6% avg upside
51 analysts
$300.00
23.61% Downside
+18.2%
SWKS
Skyworks Solutions
Jun 05, 2019 BUY Buy
+14.8% avg upside
38 analysts
$95.00
36.97% Upside
+104.0%
🔒 22 more ratings — with price targets, crowd consensus and our measured returns.
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Thomas Diffely — Frequently Asked Questions
How accurate are Thomas Diffely's stock ratings?
Based on the calls 13Foresight could measure, about 67% of Thomas's ratings were profitable over a one-year hold, with an average return of +43.5% per rating, or +27.3% versus the S&P 500. We score every analyst the same way, from historical prices.
How is Thomas ranked on 13Foresight?
Thomas Diffely is currently ranked #259 with a 4-star rating. Our rank blends hit rate, average return versus the market, and how many calls we have to judge — so a long, consistent record outweighs a few lucky picks. It is our own calculation, updated daily.
Which stocks does Thomas cover?
Thomas most recently has ratings on PLAB, ACLS, ICHR, FORM, AMKR, KLIC, PDFS, LIDR, COHU, LASR, AEIS, AMAT and 15 more. See the full coverage table above for positions, price targets and our measured returns.
Where can I see other analyst ratings?
Browse the full analyst leaderboard to compare Wall Street analysts ranked by their measured performance, success rate and average return.

Disclaimer: 13Foresight compiles analyst ratings and price targets from publicly available sources. Performance metrics, rankings and star ratings shown here are calculated independently by 13Foresight from historical market prices and may differ from figures published elsewhere. This information may be incomplete, delayed or inaccurate, is provided for research and informational purposes only, and is not investment advice. The underlying ratings and opinions are those of the respective analysts and their firms; 13Foresight accepts no liability for any decisions made based on this data.