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 |
Boeing
BA
|
+$49.5M |
| 2 |
Pinduoduo
PDD
|
+$45.3M |
| 3 |
Microsoft
MSFT
|
+$42.5M |
| 4 |
Apple
AAPL
|
+$33.3M |
| 5 |
Direxion Daily Semiconductor Bull 3X Shares
SOXL
|
+$25.4M |
Top Sells
| 1 |
Broadcom
AVGO
|
+$95.4M |
| 2 |
Citigroup
C
|
+$57.9M |
| 3 |
Pfizer
PFE
|
+$55.9M |
| 4 |
TSMC
TSM
|
+$40.4M |
| 5 |
Starbucks
SBUX
|
+$40.4M |
Sector Composition
| 1 | Technology | 23.11% |
| 2 | Consumer Discretionary | 16.53% |
| 3 | Healthcare | 8.58% |
| 4 | Industrials | 7.58% |
| 5 | Financials | 7.29% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
501
EPAM Systems
EPAM
$8.49B
| $768K | ﹤0.01% |
3,862
-5,286
| -58% | -$1.05M |
|
502
Progress Software
PRGS
$1.84B
| $764K | ﹤0.01% |
11,349
-5,710
| -33% | -$384K |
|
|
LINE
503
Lineage, Inc. Common Stock
LINE
$9.55B
| $763K | ﹤0.01% |
+9,746
| New | +$763K |
|
504
WillScot Mobile Mini Holdings
WSC
$4.12B
| $757K | ﹤0.01% |
20,140
-38,356
| -66% | -$1.44M |
|
505
MediaAlpha
MAX
$694M
| $756K | ﹤0.01% |
41,760
+32,870
| +370% | +$595K |
|
506
Coeur Mining
CDE
$9.58B
| $752K | ﹤0.01% |
109,312
-42,475
| -28% | -$292K |
|
507
Rithm Capital
RITM
$6.64B
| $752K | ﹤0.01% |
+66,274
| New | +$752K |
|
508
ARKO Corp
ARKO
$559M
| $749K | ﹤0.01% |
106,738
+10,176
| +11% | +$71.4K |
|
|
EH
509
EHang Holdings
EH
$1.14B
| $749K | ﹤0.01% |
52,991
-35,280
| -40% | -$499K |
|
510
CenterPoint Energy
CNP
$24.6B
| $744K | ﹤0.01% |
+25,318
| New | +$744K |
|
511
TG Therapeutics
TGTX
$5.05B
| $742K | ﹤0.01% |
31,759
-116,349
| -79% | -$2.72M |
|
512
Vera Bradley
VRA
$63.4M
| $740K | ﹤0.01% |
135,685
+135,222
| +29,206% | +$737K |
|
|
SWTX
513
DELISTED
SpringWorks Therapeutics
SWTX
| $739K | ﹤0.01% |
23,074
+1,981
| +9% | +$63.4K |
|
514
Sibanye-Stillwater
SBSW
$6.1B
| $738K | ﹤0.01% |
179,646
-279,857
| -61% | -$1.15M |
|
515
Biohaven
BHVN
$1.48B
| $736K | ﹤0.01% |
+14,737
| New | +$736K |
|
516
Aspen Aerogels
ASPN
$521M
| $733K | ﹤0.01% |
26,481
-7,493
| -22% | -$207K |
|
517
Community Health Systems
CYH
$404M
| $727K | ﹤0.01% |
119,913
-18,803
| -14% | -$114K |
|
518
Eos Energy Enterprises
EOSE
$1.92B
| $718K | ﹤0.01% |
241,879
+177,220
| +274% | +$526K |
|
519
Frontline
FRO
$5.02B
| $716K | ﹤0.01% |
31,355
+13,976
| +80% | +$319K |
|
520
Praxis Precision Medicines
PRAX
$836M
| $714K | ﹤0.01% |
12,418
+10,857
| +696% | +$624K |
|
521
Grifois
GRFS
$6.7B
| $711K | ﹤0.01% |
80,082
-207,270
| -72% | -$1.84M |
|
522
Humacyte
HUMA
$233M
| $711K | ﹤0.01% |
130,707
+61,690
| +89% | +$336K |
|
523
ACM Research
ACMR
$1.79B
| $706K | ﹤0.01% |
34,826
-15,439
| -31% | -$313K |
|
524
Black Stone Minerals
BSM
$2.62B
| $706K | ﹤0.01% |
46,813
+23,107
| +97% | +$348K |
|
525
Tidewater
TDW
$2.95B
| $702K | ﹤0.01% |
9,784
+5,188
| +113% | +$372K |
|