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 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$32.1M |
| 2 |
PARA
Paramount Global Class B
PARA
|
+$23.3M |
| 3 |
Pinduoduo
PDD
|
+$17.3M |
| 4 |
Pfizer
PFE
|
+$16.8M |
| 5 |
American Airlines Group
AAL
|
+$14.5M |
Top Sells
| 1 |
Amazon
AMZN
|
+$64.4M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$38.1M |
| 3 |
AutoZone
AZO
|
+$32.2M |
| 4 |
SPDR S&P 500 ETF Trust
SPY
|
+$25.3M |
| 5 |
Apple
AAPL
|
+$22.5M |
Sector Composition
| 1 | Technology | 20.25% |
| 2 | Consumer Discretionary | 15.22% |
| 3 | Healthcare | 10.03% |
| 4 | Financials | 9.2% |
| 5 | Industrials | 9.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1476
CarGurus
CARG
$3.65B
| $90K | ﹤0.01% |
3,793
-7,307
| -66% | -$173K |
|
1477
Schwab Fundamental US Small Company Index ETF
FNDA
$8.99B
| $90K | ﹤0.01% |
+3,576
| New | +$90K |
|
|
AUD
1478
DELISTED
Audacy, Inc.
AUD
| $90K | ﹤0.01% |
17,255
-26,436
| -61% | -$138K |
|
1479
Aqua Metals
AQMS
$5.57M
| $89K | ﹤0.01% |
111
+22
| +25% | +$17.6K |
|
1480
Enviri
NVRI
$1.01B
| $89K | ﹤0.01% |
5,220
+2,337
| +81% | +$39.8K |
|
1481
WD-40
WDFC
$2.87B
| $89K | ﹤0.01% |
291
-388
| -57% | -$119K |
|
1482
WisdomTree
WT
$2.03B
| $89K | ﹤0.01% |
14,289
+3,159
| +28% | +$19.7K |
|
|
MARK
1483
DELISTED
Remark Holdings, Inc.
MARK
| $89K | ﹤0.01% |
+3,915
| New | +$89K |
|
1484
Algonquin Power & Utilities
AQN
$4.23B
| $88K | ﹤0.01% |
+5,560
| New | +$88K |
|
1485
Leggett & Platt
LEG
$1.26B
| $88K | ﹤0.01% |
1,939
-16,933
| -90% | -$768K |
|
1486
Timken Company
TKR
$5.37B
| $88K | ﹤0.01% |
+1,088
| New | +$88K |
|
|
CNR
1487
Core Natural Resources, Inc.
CNR
$3.97B
| $88K | ﹤0.01% |
9,063
+6,734
| +289% | +$65.4K |
|
1488
Amplify Energy
AMPY
$178M
| $87K | ﹤0.01% |
31,527
+30,028
| +2,003% | +$82.9K |
|
1489
BioXcel Therapeutics
BTAI
$46.4M
| $87K | ﹤0.01% |
126
-78
| -38% | -$53.9K |
|
|
DADA
1490
DELISTED
Dada Nexus
DADA
| $87K | ﹤0.01% |
3,239
+1,838
| +131% | +$49.4K |
|
1491
Rackspace Technology
RXT
$345M
| $87K | ﹤0.01% |
+3,682
| New | +$87K |
|
1492
Universal Technical Institute
UTI
$1.51B
| $87K | ﹤0.01% |
14,977
+8,382
| +127% | +$48.7K |
|
1493
WideOpenWest
WOW
$442M
| $87K | ﹤0.01% |
6,406
+6,290
| +5,422% | +$85.4K |
|
1494
Real Estate Select Sector SPDR Fund
XLRE
$7.8B
| $87K | ﹤0.01% |
+2,225
| New | +$87K |
|
1495
Dana Inc
DAN
$2.68B
| $86K | ﹤0.01% |
+3,571
| New | +$86K |
|
1496
Monarch Casino & Resort
MCRI
$1.85B
| $86K | ﹤0.01% |
+1,421
| New | +$86K |
|
1497
10x Genomics
TXG
$1.6B
| $85K | ﹤0.01% |
+471
| New | +$85K |
|
|
RVNC
1498
DELISTED
Revance Therapeutics, Inc.
RVNC
| $85K | ﹤0.01% |
3,047
-3,545
| -54% | -$98.9K |
|
1499
ProShares Ultra NASDAQ Biotechnology
BIB
$55M
| $84K | ﹤0.01% |
1,016
-2,970
| -75% | -$246K |
|
|
DHC
1500
Diversified Healthcare Trust
DHC
$1.06B
| $84K | ﹤0.01% |
17,588
+16,199
| +1,166% | +$77.4K |
|