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 |
Tesla
TSLA
|
+$27.1M |
| 2 |
Netflix
NFLX
|
+$24.7M |
| 3 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$20.1M |
| 4 |
TWX
Time Warner Inc
TWX
|
+$18.3M |
| 5 |
Alibaba
BABA
|
+$14.8M |
Top Sells
| 1 |
Amazon
AMZN
|
+$71.9M |
| 2 |
Micron Technology
MU
|
+$47.7M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$26.3M |
| 4 |
Boeing
BA
|
+$21M |
| 5 |
Citigroup
C
|
+$19.6M |
Sector Composition
| 1 | Consumer Discretionary | 15.64% |
| 2 | Communication Services | 14.16% |
| 3 | Technology | 12.46% |
| 4 | Financials | 10.94% |
| 5 | Healthcare | 10.33% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
GAP
376
The Gap, Inc.
GAP
$8.8B
| $508K | 0.02% |
+16,304
| New | +$508K |
|
377
Red Rock Resorts
RRR
$3.62B
| $505K | 0.02% |
17,280
+8,969
| +108% | +$262K |
|
378
Copart
CPRT
$46.4B
| $504K | 0.02% |
39,648
+33,264
| +521% | +$423K |
|
379
iShares Russell Mid-Cap Growth ETF
IWP
$20.5B
| $502K | 0.02% |
8,182
-1,742
| -18% | -$107K |
|
380
BioMarin Pharmaceuticals
BMRN
$10.5B
| $499K | 0.02% |
6,165
-5,317
| -46% | -$430K |
|
381
Simpson Manufacturing
SSD
$7.94B
| $499K | 0.02% |
8,678
+1,260
| +17% | +$72.5K |
|
382
ProShares Ultra Dow30
DDM
$440M
| $496K | 0.02% |
11,949
-30,993
| -72% | -$1.29M |
|
383
Omeros
OMER
$287M
| $495K | 0.02% |
44,385
+13,810
| +45% | +$154K |
|
384
Invitation Homes
INVH
$18.5B
| $494K | 0.02% |
21,657
+8,104
| +60% | +$185K |
|
|
SYNT
385
DELISTED
Syntel Inc
SYNT
| $493K | 0.02% |
19,326
+16,826
| +673% | +$429K |
|
386
KeyCorp
KEY
$21B
| $491K | 0.02% |
25,134
+13,359
| +113% | +$261K |
|
|
SOHU
387
Sohu.com
SOHU
$475M
| $491K | 0.02% |
15,889
+12,970
| +444% | +$401K |
|
388
Smith & Wesson
SWBI
$383M
| $487K | 0.02% |
61,405
+8,677
| +16% | +$68.8K |
|
|
ICPT
389
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $487K | 0.02% |
7,931
+4,075
| +106% | +$250K |
|
390
Fair Isaac
FICO
$37.3B
| $485K | 0.02% |
+2,868
| New | +$485K |
|
391
Green Dot
GDOT
$774M
| $485K | 0.02% |
+7,561
| New | +$485K |
|
392
Canadian Imperial Bank of Commerce
CM
$73.3B
| $484K | 0.02% |
+10,984
| New | +$484K |
|
393
Unilever
UL
$154B
| $480K | 0.02% |
8,652
-22,115
| -72% | -$1.23M |
|
394
Mattel
MAT
$5.71B
| $477K | 0.02% |
36,310
-39,289
| -52% | -$516K |
|
395
Dentsply Sirona
XRAY
$2.74B
| $476K | 0.02% |
+9,480
| New | +$476K |
|
396
International Flavors & Fragrances
IFF
$16.4B
| $474K | 0.02% |
3,466
+2,716
| +362% | +$371K |
|
397
EQT Corp
EQT
$31.9B
| $472K | 0.02% |
18,263
+6,679
| +58% | +$173K |
|
398
Guess, Inc.
GES
$868M
| $470K | 0.02% |
22,705
+17,393
| +327% | +$360K |
|
|
SBNY
399
DELISTED
Signature Bank
SBNY
| $467K | 0.02% |
3,293
-125
| -4% | -$17.7K |
|
|
ATH
400
DELISTED
Athene Holding Ltd. Class A Common Shares
ATH
| $466K | 0.02% |
+9,759
| New | +$466K |
|