Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| 1 |
Apple
AAPL
|
+$258M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$75.7M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$67.2M |
| 4 |
Alphabet (Google) Class C
GOOG
|
+$59.4M |
| 5 |
Intel
INTC
|
+$45.8M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$56.8M |
| 2 |
iShares Silver Trust
SLV
|
+$45.9M |
| 3 |
Ford
F
|
+$32.5M |
| 4 |
Exxon Mobil
XOM
|
+$20.4M |
| 5 |
Caterpillar
CAT
|
+$19.2M |
Sector Composition
| 1 | Technology | 26.01% |
| 2 | Consumer Discretionary | 9.82% |
| 3 | Communication Services | 9.82% |
| 4 | Financials | 8.68% |
| 5 | Healthcare | 6.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
726
Noodles & Co
NDLS
$30.6M
| $288K | ﹤0.01% |
+61,329
| New | +$288K |
|
727
scPharmaceuticals
SCPH
$301M
| $288K | ﹤0.01% |
59,915
+36,759
| +159% | +$177K |
|
728
Smith Micro Software
SMSI
$15.3M
| $288K | ﹤0.01% |
14,609
+4,847
| +50% | +$95.6K |
|
729
Amplify CWP Enhanced Dividend Income ETF
DIVO
$5.04B
| $287K | ﹤0.01% |
8,576
+8,197
| +2,163% | +$274K |
|
730
Delek Logistics
DKL
$2.35B
| $286K | ﹤0.01% |
+5,882
| New | +$286K |
|
731
SPDR S&P Oil & Gas Equipment & Services ETF
XES
$157M
| $284K | ﹤0.01% |
+4,766
| New | +$284K |
|
|
ALLK
732
DELISTED
Allakos
ALLK
| $283K | ﹤0.01% |
90,606
+89,044
| +5,701% | +$278K |
|
733
iShares Russell 3000 ETF
IWV
$16.8B
| $283K | ﹤0.01% |
+1,303
| New | +$283K |
|
|
VNET
734
VNET Group
VNET
$2.13B
| $283K | ﹤0.01% |
+47,016
| New | +$283K |
|
|
DCP
735
DELISTED
DCP Midstream, LP
DCP
| $283K | ﹤0.01% |
+9,601
| New | +$283K |
|
736
Blend Labs
BLND
$1.07B
| $281K | ﹤0.01% |
+119,328
| New | +$281K |
|
737
iShares US Basic Materials ETF
IYM
$563M
| $281K | ﹤0.01% |
2,394
-1,762
| -42% | -$207K |
|
738
TriplePoint Venture Growth BDC
TPVG
$269M
| $281K | ﹤0.01% |
+22,080
| New | +$281K |
|
739
2x Long VIX Futures ETF
UVIX
$446M
| $281K | ﹤0.01% |
+33
| New | +$281K |
|
|
SAFE
740
DELISTED
Safehold Inc.
SAFE
| $281K | ﹤0.01% |
+7,962
| New | +$281K |
|
741
FLEX LNG
FLNG
$1.37B
| $279K | ﹤0.01% |
+10,192
| New | +$279K |
|
|
GPP
742
DELISTED
Green Plains Partners LP
GPP
| $278K | ﹤0.01% |
22,826
+9,956
| +77% | +$121K |
|
743
Zymeworks
ZYME
$1.15B
| $277K | ﹤0.01% |
52,358
+11,514
| +28% | +$60.9K |
|
744
SLM Corp
SLM
$6.01B
| $276K | ﹤0.01% |
+17,343
| New | +$276K |
|
745
Sensient Technologies
SXT
$4.51B
| $276K | ﹤0.01% |
3,437
-4,462
| -56% | -$358K |
|
|
NATI
746
DELISTED
National Instruments Corp
NATI
| $275K | ﹤0.01% |
+8,829
| New | +$275K |
|
747
Ardelyx
ARDX
$1.6B
| $273K | ﹤0.01% |
463,944
+213,352
| +85% | +$126K |
|
748
Healthcare Realty
HR
$6.44B
| $273K | ﹤0.01% |
9,801
-16,759
| -63% | -$467K |
|
|
BNFT
749
DELISTED
Benefitfocus, Inc.
BNFT
| $273K | ﹤0.01% |
35,141
+19,905
| +131% | +$155K |
|
750
Weibo
WB
$2.98B
| $272K | ﹤0.01% |
11,799
-10,740
| -48% | -$248K |
|