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 | +$216M | |
| 2 | +$159M | |
| 3 | +$128M | |
| 4 |
Booking.com
BKNG
|
+$62.2M |
| 5 |
SPDR S&P 500 ETF Trust
SPY
|
+$61.9M |
Top Sells
| 1 | +$141M | |
| 2 | +$53.1M | |
| 3 | +$45.7M | |
| 4 |
Netflix
NFLX
|
+$45.3M |
| 5 |
Pfizer
PFE
|
+$38.3M |
Sector Composition
| 1 | Technology | 34.74% |
| 2 | Communication Services | 9% |
| 3 | Consumer Discretionary | 8.67% |
| 4 | Healthcare | 8.07% |
| 5 | Financials | 6.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
476
James Hardie Industries
JHX
$9.68B
| $809K | ﹤0.01% |
30,096
+24,632
|
|
||
477
Enphase Energy
ENPH
$3.77B
| $809K | ﹤0.01% |
20,413
-99,548
|
|
||
478
BioNTech
BNTX
$25B
| $809K | ﹤0.01% |
+7,606
|
|
||
479
BGC Group
BGC
$4.24B
| $807K | ﹤0.01% |
78,920
+50,826
|
|
||
480
Philips
PHG
$27.5B
| $805K | ﹤0.01% |
33,591
-104,103
|
|
||
|
ARR
481
Armour Residential REIT
ARR
$1.86B
| $803K | ﹤0.01% |
47,771
+34,653
|
|
||
482
Arvinas
ARVN
$651M
| $800K | ﹤0.01% |
108,800
+23,718
|
|
||
483
ProShares Ultra Bitcoin ETF
BITU
$808M
| $797K | ﹤0.01% |
+15,411
|
|
||
484
Nice
NICE
$8.16B
| $797K | ﹤0.01% |
4,719
-41,732
|
|
||
485
Alkami Technology
ALKT
$2.12B
| $797K | ﹤0.01% |
26,453
+26,344
|
|
||
486
Redwire
RDW
$923M
| $794K | ﹤0.01% |
+48,768
|
|
||
|
HPP
487
Hudson Pacific Properties
HPP
$786M
| $793K | ﹤0.01% |
289,685
+213,930
|
|
||
488
Alpha Metallurgical Resources
AMR
$2.06B
| $792K | ﹤0.01% |
7,046
+4,901
|
|
||
489
Wolverine World Wide
WWW
$1.28B
| $788K | ﹤0.01% |
43,586
-16,153
|
|
||
490
Ingredion
INGR
$6.86B
| $784K | ﹤0.01% |
5,781
-749
|
|
||
491
Bunge Global
BG
$18.7B
| $780K | ﹤0.01% |
+9,716
|
|
||
492
Texas Roadhouse
TXRH
$11.1B
| $778K | ﹤0.01% |
4,156
-590
|
|
||
493
Lumentum
LITE
$16B
| $777K | ﹤0.01% |
8,178
-3,956
|
|
||
494
Equinox Gold
EQX
$10.2B
| $775K | ﹤0.01% |
134,893
-5,246
|
|
||
|
WNS
495
DELISTED
WNS Holdings
WNS
| $775K | ﹤0.01% |
12,258
+10,707
|
|
||
496
B2Gold
BTG
$5.5B
| $773K | ﹤0.01% |
214,242
-341,429
|
|
||
497
Cipher Mining
CIFR
$5.94B
| $765K | ﹤0.01% |
160,178
-24,837
|
|
||
498
Turning Point Brands
TPB
$1.88B
| $759K | ﹤0.01% |
10,028
+2,911
|
|
||
499
Starwood Property Trust
STWD
$6.64B
| $758K | ﹤0.01% |
37,788
-20,061
|
|
||
500
Thermo Fisher Scientific
TMO
$219B
| $757K | ﹤0.01% |
1,869
-4,375
|
|