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 | |
|---|---|---|---|---|---|---|
|
YELL
926
DELISTED
Yellow Corporation Common Stock
YELL
| $170K | ﹤0.01% |
58,293
+56,794
| +3,789% | +$166K |
|
927
Gossamer Bio
GOSS
$787M
| $169K | ﹤0.01% |
20,238
+17,328
| +595% | +$145K |
|
|
HPP
928
Hudson Pacific Properties
HPP
$1.12B
| $169K | ﹤0.01% |
+11,399
| New | +$169K |
|
929
Community Health Systems
CYH
$420M
| $168K | ﹤0.01% |
+45,012
| New | +$168K |
|
|
TBHC
930
The Brand House Collective, Inc. Common Stock
TBHC
$49.6M
| $168K | ﹤0.01% |
47,831
-7,562
| -14% | -$26.6K |
|
931
ProShares Ultra Russell2000
UWM
$393M
| $168K | ﹤0.01% |
5,449
+3,935
| +260% | +$121K |
|
|
IS
932
DELISTED
ironSource Ltd.
IS
| $168K | ﹤0.01% |
70,694
+49,466
| +233% | +$118K |
|
933
Century Aluminum
CENX
$2.29B
| $167K | ﹤0.01% |
22,730
-5,598
| -20% | -$41.1K |
|
934
Vanguard Utilities ETF
VPU
$7.33B
| $167K | ﹤0.01% |
1,097
+139
| +15% | +$21.2K |
|
|
CSSE
935
DELISTED
Chicken Soup for the Soul Entertainment, Inc. Class A Common Stock
CSSE
| $167K | ﹤0.01% |
22,557
+18,556
| +464% | +$137K |
|
936
American Woodmark
AMWD
$997M
| $166K | ﹤0.01% |
3,709
+1,067
| +40% | +$47.8K |
|
937
Krispy Kreme
DNUT
$539M
| $166K | ﹤0.01% |
12,230
-96,573
| -89% | -$1.31M |
|
938
QuinStreet
QNST
$939M
| $166K | ﹤0.01% |
16,577
-2,847
| -15% | -$28.5K |
|
939
ARS Pharmaceuticals
SPRY
$1B
| $166K | ﹤0.01% |
39,195
+38,824
| +10,465% | +$164K |
|
|
PDCO
940
DELISTED
Patterson Companies, Inc.
PDCO
| $166K | ﹤0.01% |
+5,480
| New | +$166K |
|
941
Integra LifeSciences
IART
$1.21B
| $165K | ﹤0.01% |
+3,065
| New | +$165K |
|
942
iShares Russell 2000 Growth ETF
IWO
$12.8B
| $165K | ﹤0.01% |
800
| – | – |
|
943
Openlane
KAR
$3.15B
| $164K | ﹤0.01% |
11,105
+4,681
| +73% | +$69.1K |
|
944
Rush Street Interactive
RSI
$2.05B
| $164K | ﹤0.01% |
35,159
+13,163
| +60% | +$61.4K |
|
945
Vanguard Total World Stock ETF
VT
$52.8B
| $164K | ﹤0.01% |
+1,922
| New | +$164K |
|
|
MDC
946
DELISTED
M.D.C. Holdings, Inc.
MDC
| $164K | ﹤0.01% |
5,088
+3,043
| +149% | +$98.1K |
|
947
W.R. Berkley
WRB
$28B
| $163K | ﹤0.01% |
3,596
-1,468
| -29% | -$66.5K |
|
948
Roivant Sciences
ROIV
$9.84B
| $162K | ﹤0.01% |
39,954
+29,432
| +280% | +$119K |
|
949
AvePoint
AVPT
$3.41B
| $161K | ﹤0.01% |
37,216
+32,463
| +683% | +$140K |
|
950
MicroSectors FANG+ ETNs due Jan 8 2038
FNGS
$520M
| $161K | ﹤0.01% |
7,519
-7,657
| -50% | -$164K |
|