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
|
$35.2M |
| 2 |
Micron Technology
MU
|
$32.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
$29.5M |
| 4 |
NVIDIA
NVDA
|
$22.9M |
| 5 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$22M |
Top Sells
| 1 |
TWX
Time Warner Inc
TWX
|
$34.8M |
| 2 |
Amazon
AMZN
|
$33.4M |
| 3 |
Tesla
TSLA
|
$19.8M |
| 4 |
Netflix
NFLX
|
$17.7M |
| 5 |
TWTR
Twitter, Inc.
TWTR
|
$13.5M |
Sector Composition
| 1 | Technology | 20.43% |
| 2 | Consumer Discretionary | 15.24% |
| 3 | Communication Services | 12% |
| 4 | Financials | 10.18% |
| 5 | Industrials | 9.87% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
476
MakeMyTrip
MMYT
$9.56B
| $479K | ﹤0.01% |
13,269
+7,074
| +114% | +$255K |
|
477
Graphic Packaging
GPK
$6.38B
| $478K | ﹤0.01% |
+32,970
| New | +$478K |
|
478
Leidos
LDOS
$23B
| $478K | ﹤0.01% |
8,114
-9,352
| -54% | -$551K |
|
479
Omeros
OMER
$284M
| $477K | ﹤0.01% |
26,323
-18,062
| -41% | -$327K |
|
480
SM Energy
SM
$3.09B
| $477K | ﹤0.01% |
18,597
-10,925
| -37% | -$280K |
|
|
TTM
481
DELISTED
Tata Motors Limited
TTM
| $477K | ﹤0.01% |
+24,446
| New | +$477K |
|
|
STAY
482
DELISTED
Extended Stay America, Inc. Paired Share Unit
STAY
| $476K | ﹤0.01% |
22,058
+11,024
| +100% | +$238K |
|
|
ATVI
483
DELISTED
Activision Blizzard Inc.
ATVI
| $474K | ﹤0.01% |
6,214
-22,954
| -79% | -$1.75M |
|
|
TGH
484
DELISTED
Textainer Group Holdings limited
TGH
| $473K | ﹤0.01% |
29,751
+6,089
| +26% | +$96.8K |
|
485
Biogen
BIIB
$20.6B
| $470K | ﹤0.01% |
+1,620
| New | +$470K |
|
486
United Rentals
URI
$62.7B
| $468K | ﹤0.01% |
+3,174
| New | +$468K |
|
487
Extreme Networks
EXTR
$2.87B
| $467K | ﹤0.01% |
58,669
+53,324
| +998% | +$424K |
|
|
CLDR
488
DELISTED
Cloudera, Inc.
CLDR
| $466K | ﹤0.01% |
34,206
-27,971
| -45% | -$381K |
|
489
Brinker International
EAT
$7.04B
| $465K | ﹤0.01% |
9,776
+4,103
| +72% | +$195K |
|
|
VRN
490
DELISTED
Veren
VRN
| $464K | ﹤0.01% |
63,222
+50,271
| +388% | +$369K |
|
491
Sempra
SRE
$52.9B
| $463K | ﹤0.01% |
+7,976
| New | +$463K |
|
492
W&T Offshore
WTI
$261M
| $458K | ﹤0.01% |
64,172
+54,843
| +588% | +$391K |
|
|
SYNT
493
DELISTED
Syntel Inc
SYNT
| $458K | ﹤0.01% |
14,277
-5,049
| -26% | -$162K |
|
|
TSG
494
DELISTED
The Stars Group Inc.
TSG
| $455K | ﹤0.01% |
12,550
+10,223
| +439% | +$371K |
|
495
Barclays
BCS
$69.1B
| $454K | ﹤0.01% |
+47,366
| New | +$454K |
|
496
ASML
ASML
$307B
| $453K | ﹤0.01% |
+2,289
| New | +$453K |
|
|
ITCI
497
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $452K | ﹤0.01% |
25,587
-6,255
| -20% | -$110K |
|
|
FRAN
498
DELISTED
Francesca's Holdings Corporation
FRAN
| $452K | ﹤0.01% |
4,994
+4,499
| +909% | +$407K |
|
499
GDS Holdings
GDS
$6.35B
| $450K | ﹤0.01% |
11,226
+8,761
| +355% | +$351K |
|
500
Natural Health Trends
NHTC
$52.6M
| $450K | ﹤0.01% |
18,020
+7,664
| +74% | +$191K |
|