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 |
LNKD
LinkedIn Corporation
LNKD
|
+$29.3M |
| 2 |
SPDR Gold Trust
GLD
|
+$18.1M |
| 3 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$14.9M |
| 4 |
Biogen
BIIB
|
+$13.7M |
| 5 |
Visa
V
|
+$13.3M |
Top Sells
| 1 |
Broadcom
AVGO
|
+$37.4M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$20.1M |
| 3 |
iShares MSCI Emerging Markets ETF
EEM
|
+$15.8M |
| 4 |
Citigroup
C
|
+$13.9M |
| 5 |
SPDR S&P MidCap 400 ETF Trust
MDY
|
+$12.9M |
Sector Composition
| 1 | Communication Services | 12.51% |
| 2 | Healthcare | 12.38% |
| 3 | Technology | 12.22% |
| 4 | Consumer Discretionary | 8.59% |
| 5 | Financials | 8.53% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
476
Puma Biotechnology
PBYI
$230M
| $242K | 0.02% |
8,148
-4,410
| -35% | -$131K |
|
477
Imperial Oil
IMO
$44.5B
| $240K | 0.02% |
+7,618
| New | +$240K |
|
478
Lithia Motors
LAD
$8.71B
| $240K | 0.02% |
+3,385
| New | +$240K |
|
|
TA
479
DELISTED
TravelCenters of America LLC
TA
| $238K | 0.02% |
5,844
+4,616
| +376% | +$188K |
|
480
Lexicon Pharmaceuticals
LXRX
$392M
| $235K | 0.02% |
16,380
+16,257
| +13,217% | +$233K |
|
481
Direxion Daily FTSE China Bear 3X Shares
YANG
$170M
| $234K | 0.02% |
+57
| New | +$234K |
|
482
Teva Pharmaceuticals
TEVA
$22.6B
| $233K | 0.02% |
4,658
-31,626
| -87% | -$1.58M |
|
483
Edison International
EIX
$21.1B
| $231K | 0.02% |
+2,977
| New | +$231K |
|
|
MDC
484
DELISTED
M.D.C. Holdings, Inc.
MDC
| $229K | 0.02% |
13,113
-1,885
| -13% | -$32.9K |
|
485
Rocket Pharmaceuticals
RCKT
$346M
| $226K | 0.02% |
+7,616
| New | +$226K |
|
486
Westlake Corp
WLK
$11B
| $225K | 0.02% |
5,262
+4,966
| +1,678% | +$212K |
|
487
BOK Financial
BOKF
$7.18B
| $224K | 0.02% |
+3,580
| New | +$224K |
|
488
Opko Health
OPK
$1.12B
| $224K | 0.02% |
24,036
-27,460
| -53% | -$256K |
|
|
CYNO
489
DELISTED
Cynosure, Inc. Class A
CYNO
| $223K | 0.01% |
+4,587
| New | +$223K |
|
490
HF Sinclair
DINO
$9.56B
| $222K | 0.01% |
9,341
-2,440
| -21% | -$58K |
|
491
Lloyds Banking Group
LYG
$65.9B
| $222K | 0.01% |
74,814
+35,642
| +91% | +$106K |
|
492
Mercado Libre
MELI
$119B
| $221K | 0.01% |
1,574
+992
| +170% | +$139K |
|
|
DDC
493
DELISTED
Dominion Diamond Corporation
DDC
| $221K | 0.01% |
+25,010
| New | +$221K |
|
494
CACI
CACI
$10.4B
| $220K | 0.01% |
+2,440
| New | +$220K |
|
|
AUO
495
DELISTED
AU Optronics Corp
AUO
| $219K | 0.01% |
62,896
+62,845
| +123,225% | +$219K |
|
496
Intercontinental Exchange
ICE
$99.3B
| $215K | 0.01% |
4,200
-6,145
| -59% | -$315K |
|
|
HDS
497
DELISTED
HD Supply Holdings, Inc.
HDS
| $215K | 0.01% |
+6,191
| New | +$215K |
|
498
SPDR Euro Stoxx 50 ETF
FEZ
$4.56B
| $214K | 0.01% |
6,889
-42,736
| -86% | -$1.33M |
|
499
Valero Energy
VLO
$50.3B
| $214K | 0.01% |
+4,214
| New | +$214K |
|
|
PRMW
500
DELISTED
Primo Water Corporation
PRMW
| $214K | 0.01% |
15,351
+13,877
| +941% | +$193K |
|