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 |
Alphabet (Google) Class C
GOOG
|
+$54.6M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$52.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
+$40.9M |
| 4 |
Apple
AAPL
|
+$16.5M |
| 5 |
Visa
V
|
+$12M |
Top Sells
| 1 |
Amazon
AMZN
|
+$98.7M |
| 2 |
Meta Platforms (Facebook)
META
|
+$70.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$33.4M |
| 4 |
Goldman Sachs
GS
|
+$30.2M |
| 5 |
Boeing
BA
|
+$26.5M |
Sector Composition
| 1 | Communication Services | 14.71% |
| 2 | Consumer Discretionary | 14.32% |
| 3 | Technology | 11.86% |
| 4 | Financials | 7.38% |
| 5 | Industrials | 6.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
AABA
701
DELISTED
Altaba Inc. Common Stock
AABA
| $167K | ﹤0.01% |
2,893
-59,866
| -95% | -$3.46M |
|
702
Cars.com
CARS
$836M
| $166K | ﹤0.01% |
7,724
-38,765
| -83% | -$833K |
|
|
IMGN
703
DELISTED
Immunogen Inc
IMGN
| $166K | ﹤0.01% |
34,650
-10,747
| -24% | -$51.5K |
|
|
RUSL
704
DELISTED
Direxion Daily Russia Bull 2X Shares
RUSL
| $166K | ﹤0.01% |
+5,571
| New | +$166K |
|
705
LKQ Corp
LKQ
$8.39B
| $165K | ﹤0.01% |
+6,989
| New | +$165K |
|
706
BCE
BCE
$22.6B
| $164K | ﹤0.01% |
+4,153
| New | +$164K |
|
707
Digimarc
DMRC
$198M
| $164K | ﹤0.01% |
11,320
+3,059
| +37% | +$44.3K |
|
708
Inseego
INSG
$202M
| $163K | ﹤0.01% |
3,937
+832
| +27% | +$34.4K |
|
|
NSTG
709
DELISTED
NanoString Technologies, Inc.
NSTG
| $162K | ﹤0.01% |
10,940
+1,043
| +11% | +$15.4K |
|
|
DNR
710
DELISTED
Denbury Resources, Inc.
DNR
| $162K | ﹤0.01% |
+95,202
| New | +$162K |
|
|
SMAR
711
DELISTED
Smartsheet Inc.
SMAR
| $161K | ﹤0.01% |
+6,491
| New | +$161K |
|
712
Chegg
CHGG
$170M
| $160K | ﹤0.01% |
5,656
-25,062
| -82% | -$709K |
|
713
Middleby
MIDD
$7.13B
| $160K | ﹤0.01% |
1,562
+206
| +15% | +$21.1K |
|
714
Sinclair Inc
SBGI
$935M
| $159K | ﹤0.01% |
+6,067
| New | +$159K |
|
|
BMCH
715
DELISTED
BMC Stock Holdings, Inc
BMCH
| $159K | ﹤0.01% |
+10,278
| New | +$159K |
|
|
WUBA
716
DELISTED
58.COM INC
WUBA
| $159K | ﹤0.01% |
+2,940
| New | +$159K |
|
717
Ashland
ASH
$2.45B
| $158K | ﹤0.01% |
+2,231
| New | +$158K |
|
718
Acuity Brands
AYI
$10.3B
| $158K | ﹤0.01% |
+1,378
| New | +$158K |
|
719
Mercury Systems
MRCY
$4.41B
| $158K | ﹤0.01% |
3,343
+2,713
| +431% | +$128K |
|
720
Direxion Daily MSCI Brazil Bull 2X Shares
BRZU
$138M
| $157K | ﹤0.01% |
180
-1,724
| -91% | -$1.5M |
|
721
QuidelOrtho
QDEL
$1.97B
| $157K | ﹤0.01% |
3,231
+2,316
| +253% | +$113K |
|
722
Amplify Alternative Harvest ETF
MJ
$174M
| $156K | ﹤0.01% |
+522
| New | +$156K |
|
723
Tucows
TCX
$204M
| $156K | ﹤0.01% |
2,602
-9,548
| -79% | -$572K |
|
724
Teucrium Wheat Fund
WEAT
$116M
| $156K | ﹤0.01% |
26,448
+5,134
| +24% | +$30.3K |
|
|
SCG
725
DELISTED
Scana
SCG
| $156K | ﹤0.01% |
+3,282
| New | +$156K |
|