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 |
Invesco QQQ Trust
QQQ
|
$92M |
| 2 |
Walt Disney
DIS
|
$25.4M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
$12.8M |
| 4 |
Baidu
BIDU
|
$12.2M |
| 5 |
RHT
Red Hat Inc
RHT
|
$11.6M |
Top Sells
| 1 |
iShares Russell 2000 ETF
IWM
|
$61.4M |
| 2 |
Amazon
AMZN
|
$59.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
$35.5M |
| 4 |
Apple
AAPL
|
$19.6M |
| 5 |
Financial Select Sector SPDR Fund
XLF
|
$18.2M |
Sector Composition
| 1 | Communication Services | 16.98% |
| 2 | Technology | 12.42% |
| 3 | Healthcare | 10.02% |
| 4 | Consumer Discretionary | 8.53% |
| 5 | Industrials | 6.02% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
476
Mercury Systems
MRCY
$4.13B
| $383K | ﹤0.01% |
5,988
+2,645
| +79% | +$169K |
|
477
MGIC Investment
MTG
$6.55B
| $383K | ﹤0.01% |
29,053
-10,275
| -26% | -$135K |
|
478
O'Reilly Automotive
ORLY
$89B
| $383K | ﹤0.01% |
+14,820
| New | +$383K |
|
479
Commerce Bancshares
CBSH
$8.08B
| $380K | ﹤0.01% |
+8,778
| New | +$380K |
|
480
Direxion Daily Technology Bear 3x Shares
TECS
$56.5M
| $379K | ﹤0.01% |
+25
| New | +$379K |
|
481
Banco Bradesco
BBD
$33.6B
| $378K | ﹤0.01% |
+55,445
| New | +$378K |
|
482
Range Resources
RRC
$8.27B
| $378K | ﹤0.01% |
33,633
+33,409
| +14,915% | +$375K |
|
483
Box
BOX
$4.75B
| $377K | ﹤0.01% |
+19,556
| New | +$377K |
|
484
Children's Place
PLCE
$121M
| $377K | ﹤0.01% |
+3,880
| New | +$377K |
|
|
ALDR
485
DELISTED
Alder Biopharmaceuticals, Inc.
ALDR
| $377K | ﹤0.01% |
27,663
+27,203
| +5,914% | +$371K |
|
486
Aptiv
APTV
$17.5B
| $375K | ﹤0.01% |
4,722
-3,423
| -42% | -$272K |
|
487
Booking.com
BKNG
$178B
| $375K | ﹤0.01% |
+215
| New | +$375K |
|
488
ProShares UltraPro S&P 500
UPRO
$4.49B
| $375K | ﹤0.01% |
+15,240
| New | +$375K |
|
489
Caesars Entertainment
CZR
$5.48B
| $374K | ﹤0.01% |
8,025
+5,732
| +250% | +$267K |
|
490
Direxion Daily S&P Biotech Bear 3X Shares
LABD
$56.8M
| $374K | ﹤0.01% |
1,017
-280
| -22% | -$103K |
|
491
Louisiana-Pacific
LPX
$6.9B
| $374K | ﹤0.01% |
15,376
+11,986
| +354% | +$292K |
|
492
Glaukos
GKOS
$5.39B
| $373K | ﹤0.01% |
+4,770
| New | +$373K |
|
493
Olin
OLN
$2.9B
| $372K | ﹤0.01% |
16,106
-7,596
| -32% | -$175K |
|
494
Molina Healthcare
MOH
$9.47B
| $371K | ﹤0.01% |
+2,618
| New | +$371K |
|
|
HDS
495
DELISTED
HD Supply Holdings, Inc.
HDS
| $368K | ﹤0.01% |
+8,500
| New | +$368K |
|
496
YPF
YPF
$12.1B
| $367K | ﹤0.01% |
26,200
-4,809
| -16% | -$67.4K |
|
497
Builders FirstSource
BLDR
$16.5B
| $366K | ﹤0.01% |
27,498
+17,263
| +169% | +$230K |
|
498
B&G Foods
BGS
$374M
| $365K | ﹤0.01% |
+14,961
| New | +$365K |
|
|
AXE
499
DELISTED
Anixter International Inc
AXE
| $365K | ﹤0.01% |
6,519
+2,749
| +73% | +$154K |
|
500
Cimpress
CMPR
$1.54B
| $360K | ﹤0.01% |
+4,493
| New | +$360K |
|