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 | |
|---|---|---|---|---|---|---|
1551
West Fraser Timber
WFG
$5.96B
| $19K | ﹤0.01% |
+196
| New | +$19K |
|
1552
Cactus
WHD
$2.74B
| $19K | ﹤0.01% |
+325
| New | +$19K |
|
1553
Zymeworks
ZYME
$1.19B
| $19K | ﹤0.01% |
1,530
-10,581
| -87% | -$131K |
|
|
ASA
1554
ASA Gold and Precious Metals
ASA
$783M
| $18K | ﹤0.01% |
+903
| New | +$18K |
|
1555
Astec Industries
ASTE
$1.06B
| $18K | ﹤0.01% |
+582
| New | +$18K |
|
1556
Citizens
CIA
$274M
| $18K | ﹤0.01% |
+5,101
| New | +$18K |
|
1557
Dave Inc
DAVE
$3.1B
| $18K | ﹤0.01% |
467
-389
| -45% | -$15K |
|
1558
Eagle Materials
EXP
$7.57B
| $18K | ﹤0.01% |
63
-163
| -72% | -$46.6K |
|
1559
First Trust NYSE Arca Biotechnology Index Fund
FBT
$1.07B
| $18K | ﹤0.01% |
+108
| New | +$18K |
|
1560
iShares Select U.S. REIT ETF
ICF
$1.93B
| $18K | ﹤0.01% |
285
-2,440
| -90% | -$154K |
|
|
BRSL
1561
Brightstar Lottery PLC
BRSL
$3.12B
| $18K | ﹤0.01% |
+852
| New | +$18K |
|
1562
Medallion Financial
MFIN
$244M
| $18K | ﹤0.01% |
2,267
-12,360
| -85% | -$98.1K |
|
1563
Microvast
MVST
$1.06B
| $18K | ﹤0.01% |
75,347
+19,228
| +34% | +$4.59K |
|
1564
Nurix Therapeutics
NRIX
$691M
| $18K | ﹤0.01% |
832
-1,374
| -62% | -$29.7K |
|
1565
Sociedad Química y Minera de Chile
SQM
$12B
| $18K | ﹤0.01% |
448
-17,453
| -97% | -$701K |
|
1566
Tempest Therapeutics
TPST
$45.6M
| $18K | ﹤0.01% |
1,006
+989
| +5,818% | +$17.7K |
|
1567
ReposiTrak
TRAK
$311M
| $18K | ﹤0.01% |
1,022
-761
| -43% | -$13.4K |
|
1568
Trex
TREX
$6.48B
| $18K | ﹤0.01% |
+271
| New | +$18K |
|
1569
Waste Connections
WCN
$45.3B
| $18K | ﹤0.01% |
+101
| New | +$18K |
|
|
CMRX
1570
DELISTED
Chimerix, Inc.
CMRX
| $18K | ﹤0.01% |
20,306
-12,639
| -38% | -$11.2K |
|
|
BCYC
1571
Bicycle Therapeutics
BCYC
$490M
| $17K | ﹤0.01% |
771
+251
| +48% | +$5.53K |
|
1572
Blackbaud
BLKB
$3.38B
| $17K | ﹤0.01% |
+207
| New | +$17K |
|
1573
Clarivate
CLVT
$2.88B
| $17K | ﹤0.01% |
2,424
+1,534
| +172% | +$10.8K |
|
1574
Embecta
EMBC
$878M
| $17K | ﹤0.01% |
1,232
-977
| -44% | -$13.5K |
|
1575
First Advantage
FA
$2.75B
| $17K | ﹤0.01% |
+895
| New | +$17K |
|