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 | |
|---|---|---|---|---|---|---|
326
Eagle Materials
EXP
$7.86B
| $1.26M | ﹤0.01% |
+9,394
| New | +$1.26M |
|
|
LSI
327
DELISTED
Life Storage, Inc.
LSI
| $1.26M | ﹤0.01% |
14,661
+6,102
| +71% | +$524K |
|
|
THCA
328
DELISTED
Tuscan Holdings Corp. II Common Stock
THCA
| $1.26M | ﹤0.01% |
+124,808
| New | +$1.26M |
|
329
Invesco DB Commodity Index Tracking Fund
DBC
$1.26B
| $1.25M | ﹤0.01% |
75,246
+54,738
| +267% | +$909K |
|
330
Entegris
ENTG
$12.4B
| $1.24M | ﹤0.01% |
+11,105
| New | +$1.24M |
|
331
Trip.com Group
TCOM
$47.6B
| $1.24M | ﹤0.01% |
31,211
-19,775
| -39% | -$783K |
|
332
Amplify Transformational Data Sharing ETF
BLOK
$1.16B
| $1.22M | ﹤0.01% |
21,798
-30,683
| -58% | -$1.71M |
|
333
Gen Digital
GEN
$18.2B
| $1.21M | ﹤0.01% |
56,961
-7,558
| -12% | -$161K |
|
334
iShares MSCI Germany ETF
EWG
$2.51B
| $1.21M | ﹤0.01% |
+36,183
| New | +$1.21M |
|
|
NOAH
335
Noah Holdings
NOAH
$797M
| $1.21M | ﹤0.01% |
27,242
+16,460
| +153% | +$730K |
|
336
Rayonier
RYN
$4.12B
| $1.21M | ﹤0.01% |
39,339
+11,585
| +42% | +$355K |
|
337
National Grid
NGG
$69.6B
| $1.2M | ﹤0.01% |
22,562
+14,080
| +166% | +$748K |
|
|
LFC
338
DELISTED
China Life Insurance Company Ltd.
LFC
| $1.2M | ﹤0.01% |
114,935
+3,732
| +3% | +$38.8K |
|
339
Enbridge
ENB
$105B
| $1.19M | ﹤0.01% |
32,798
+9,898
| +43% | +$360K |
|
340
Cirrus Logic
CRUS
$5.94B
| $1.19M | ﹤0.01% |
14,040
+12,166
| +649% | +$1.03M |
|
341
Lear
LEA
$5.91B
| $1.18M | ﹤0.01% |
6,530
-1,271
| -16% | -$230K |
|
342
MACOM Technology Solutions
MTSI
$9.67B
| $1.18M | ﹤0.01% |
+20,297
| New | +$1.18M |
|
343
UWM Holdings
UWMC
$1.38B
| $1.17M | ﹤0.01% |
148,072
-61,014
| -29% | -$484K |
|
344
Vanguard S&P 500 Growth ETF
VOOG
$19.3B
| $1.17M | ﹤0.01% |
4,968
+4,368
| +728% | +$1.03M |
|
345
Airbnb
ABNB
$75.8B
| $1.17M | ﹤0.01% |
6,199
-16,491
| -73% | -$3.1M |
|
346
SPDR Portfolio S&P 1500 Composite Stock Market ETF
SPTM
$11B
| $1.16M | ﹤0.01% |
23,663
+4,185
| +21% | +$206K |
|
347
Ameresco
AMRC
$1.37B
| $1.16M | ﹤0.01% |
23,800
-3,246
| -12% | -$158K |
|
|
CRON
348
Cronos Group
CRON
$957M
| $1.14M | ﹤0.01% |
+120,666
| New | +$1.14M |
|
|
FLIR
349
DELISTED
FLIR Systems, Inc. (DE) Common Stock
FLIR
| $1.14M | ﹤0.01% |
20,189
-12,558
| -38% | -$709K |
|
350
Vroom, Inc. Common Stock
VRM
$140M
| $1.13M | ﹤0.01% |
363
-298
| -45% | -$930K |
|