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 |
Alphabet (Google) Class C
GOOG
|
+$41.4M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
+$12.3M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
+$9.89M |
| 4 |
Alibaba
BABA
|
+$9.66M |
| 5 |
Intel
INTC
|
+$9.11M |
Top Sells
| 1 |
Apple
AAPL
|
+$36.8M |
| 2 |
Gilead Sciences
GILD
|
+$31.2M |
| 3 |
Booking.com
BKNG
|
+$29M |
| 4 |
Amazon
AMZN
|
+$25.6M |
| 5 |
Baidu
BIDU
|
+$12.9M |
Sector Composition
| 1 | Communication Services | 13.31% |
| 2 | Consumer Discretionary | 13.07% |
| 3 | Healthcare | 12.41% |
| 4 | Technology | 11.91% |
| 5 | Financials | 8.28% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
MEMP
551
DELISTED
Memorial Production Partners LP Common Units
MEMP
| $126K | 0.01% |
+7,801
| New | +$126K |
|
552
Deere & Co
DE
$130B
| $125K | 0.01% |
1,428
-10,982
| -88% | -$961K |
|
553
MEI Pharma
MEIP
$91.3M
| $125K | 0.01% |
+3,512
| New | +$125K |
|
|
NSR
554
DELISTED
Neustar Inc
NSR
| $125K | 0.01% |
5,100
+4,097
| +408% | +$100K |
|
555
Autohome
ATHM
$3.38B
| $124K | 0.01% |
2,842
+614
| +28% | +$26.8K |
|
556
Chart Industries
GTLS
$8.98B
| $124K | 0.01% |
+3,552
| New | +$124K |
|
|
MRO
557
DELISTED
Marathon Oil Corporation
MRO
| $124K | 0.01% |
+4,773
| New | +$124K |
|
|
ENZ
558
DELISTED
Enzo Biochem, Inc.
ENZ
| $123K | 0.01% |
+41,901
| New | +$123K |
|
|
SALE
559
DELISTED
RetailMeNot, Inc. Series 1
SALE
| $123K | 0.01% |
6,845
-22,278
| -76% | -$400K |
|
|
IOC
560
DELISTED
Interoil Corporation
IOC
| $123K | 0.01% |
2,677
-13,143
| -83% | -$604K |
|
561
AGNC Investment
AGNC
$10.8B
| $122K | 0.01% |
+5,743
| New | +$122K |
|
562
Invesco Mortgage Capital
IVR
$521M
| $122K | 0.01% |
792
+759
| +2,300% | +$117K |
|
563
Children's Place
PLCE
$143M
| $122K | 0.01% |
1,903
+446
| +31% | +$28.6K |
|
564
Tyson Foods
TSN
$19.9B
| $122K | 0.01% |
+3,198
| New | +$122K |
|
565
Global X MSCI Greece ETF
GREK
$304M
| $120K | 0.01% |
3,658
+3,504
| +2,275% | +$115K |
|
|
AZPN
566
DELISTED
ASPEN TECHNOLOGY INC
AZPN
| $120K | 0.01% |
3,138
-294
| -9% | -$11.2K |
|
567
ProShares UltraShort Bloomberg Natural Gas
KOLD
$177M
| $119K | 0.01% |
+411
| New | +$119K |
|
|
SPLS
568
DELISTED
Staples Inc
SPLS
| $119K | 0.01% |
7,311
+3,029
| +71% | +$49.3K |
|
|
TIVO
569
DELISTED
Tivo Inc
TIVO
| $118K | 0.01% |
+6,481
| New | +$118K |
|
570
iShares MSCI Europe Financials ETF
EUFN
$4.4B
| $117K | 0.01% |
+5,108
| New | +$117K |
|
571
Freshpet
FRPT
$2.72B
| $117K | 0.01% |
+6,025
| New | +$117K |
|
572
Icahn Enterprises
IEP
$4.75B
| $117K | 0.01% |
1,314
+298
| +29% | +$26.5K |
|
573
Oshkosh
OSK
$8.7B
| $117K | 0.01% |
+2,399
| New | +$117K |
|
574
Stellantis
STLA
$25.8B
| $117K | 0.01% |
+11,052
| New | +$117K |
|
|
MMP
575
DELISTED
Magellan Midstream Partners, L.P.
MMP
| $117K | 0.01% |
1,527
-794
| -34% | -$60.8K |
|