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 |
iShares Russell 2000 ETF
IWM
|
+$27.5M |
| 2 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$16.3M |
| 3 |
Walt Disney
DIS
|
+$13.9M |
| 4 |
iShares MSCI Emerging Markets ETF
EEM
|
+$10.4M |
| 5 |
Gilead Sciences
GILD
|
+$10.4M |
Top Sells
| 1 |
Alphabet (Google) Class C
GOOG
|
+$95.3M |
| 2 |
Apple
AAPL
|
+$21.1M |
| 3 |
Meta Platforms (Facebook)
META
|
+$20M |
| 4 |
IBM
IBM
|
+$13.4M |
| 5 |
Baidu
BIDU
|
+$12.1M |
Sector Composition
| 1 | Healthcare | 13.63% |
| 2 | Communication Services | 9.81% |
| 3 | Consumer Discretionary | 9.7% |
| 4 | Technology | 9.67% |
| 5 | Financials | 9.48% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
ABB
501
DELISTED
ABB Ltd.
ABB
| $177K | 0.01% |
10,050
+8,941
| +806% | +$157K |
|
502
The Greenbrier Companies
GBX
$1.42B
| $176K | 0.01% |
+5,494
| New | +$176K |
|
|
PMCS
503
DELISTED
P M C SIERRA INC
PMCS
| $176K | 0.01% |
+26,017
| New | +$176K |
|
504
Allegion
ALLE
$14.6B
| $175K | 0.01% |
+3,050
| New | +$175K |
|
505
Antero Resources
AR
$10.2B
| $175K | 0.01% |
8,281
-1,139
| -12% | -$24.1K |
|
506
Calumet Specialty Products
CLMT
$1.51B
| $175K | 0.01% |
7,229
+5,652
| +358% | +$137K |
|
|
SODA
507
DELISTED
SodaStream International Ltd
SODA
| $175K | 0.01% |
+12,769
| New | +$175K |
|
508
Shake Shack
SHAK
$3.91B
| $174K | 0.01% |
+3,680
| New | +$174K |
|
|
NBIS
509
Nebius Group N.V. Class A Ordinary Shares
NBIS
$22.6B
| $174K | 0.01% |
16,247
-2,869
| -15% | -$30.7K |
|
510
OSI Systems
OSIS
$3.99B
| $173K | 0.01% |
2,258
+2,030
| +890% | +$156K |
|
|
SGEN
511
DELISTED
Seagen Inc. Common Stock
SGEN
| $173K | 0.01% |
+4,488
| New | +$173K |
|
512
Avis
CAR
$5.49B
| $172K | 0.01% |
+3,946
| New | +$172K |
|
513
Dollar Tree
DLTR
$20.2B
| $172K | 0.01% |
2,584
-672
| -21% | -$44.7K |
|
514
Helmerich & Payne
HP
$2.09B
| $172K | 0.01% |
3,647
-6,339
| -63% | -$299K |
|
515
Dr. Reddy's Laboratories
RDY
$12.1B
| $172K | 0.01% |
13,525
+7,915
| +141% | +$101K |
|
|
IQNT
516
DELISTED
Inteliquent, Inc.
IQNT
| $171K | 0.01% |
+7,696
| New | +$171K |
|
517
Direxion Daily Semiconductor Bull 3X Shares
SOXL
$12.8B
| $170K | 0.01% |
+123,960
| New | +$170K |
|
|
NUAN
518
DELISTED
Nuance Communications, Inc.
NUAN
| $170K | 0.01% |
12,028
-3,134
| -21% | -$44.3K |
|
|
NRF
519
DELISTED
NorthStar Realty Finance Corp.
NRF
| $169K | 0.01% |
+6,857
| New | +$169K |
|
|
PRE
520
DELISTED
PARTNERRE LTD
PRE
| $169K | 0.01% |
+1,217
| New | +$169K |
|
521
FedEx
FDX
$53.4B
| $168K | 0.01% |
1,168
-15,683
| -93% | -$2.26M |
|
522
Xerox
XRX
$462M
| $168K | 0.01% |
6,584
+6,554
| +21,847% | +$167K |
|
|
SPNC
523
DELISTED
Spectranetics Corp
SPNC
| $168K | 0.01% |
+14,268
| New | +$168K |
|
524
Duke Energy
DUK
$94.2B
| $167K | 0.01% |
2,328
-19,356
| -89% | -$1.39M |
|
525
NextEra Energy, Inc.
NEE
$146B
| $167K | 0.01% |
6,880
-22,652
| -77% | -$550K |
|