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
|
+$85.4M |
| 2 |
SPDR Gold Trust
GLD
|
+$75.9M |
| 3 |
NVIDIA
NVDA
|
+$42.6M |
| 4 |
Netflix
NFLX
|
+$41.1M |
| 5 |
iShares MSCI EAFE ETF
EFA
|
+$40.5M |
Top Sells
| 1 |
Apple
AAPL
|
+$65.7M |
| 2 |
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
|
+$25.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
+$24.4M |
| 4 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$24.3M |
| 5 |
Broadcom
AVGO
|
+$21.3M |
Sector Composition
| 1 | Technology | 15.2% |
| 2 | Consumer Discretionary | 14.52% |
| 3 | Communication Services | 10.57% |
| 4 | Healthcare | 8.15% |
| 5 | Financials | 7.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
ONDK
1501
DELISTED
On Deck Capital, Inc.
ONDK
| $18K | ﹤0.01% |
26,256
+14,861
| +130% | +$10.2K |
|
1502
Steven Madden
SHOO
$2.26B
| $17K | ﹤0.01% |
716
-2,194
| -75% | -$52.1K |
|
1503
Acacia Research
ACTG
$317M
| $17K | ﹤0.01% |
4,201
+218
| +5% | +$882 |
|
|
ADAP
1504
Adaptimmune Therapeutics
ADAP
$13.9M
| $17K | ﹤0.01% |
1,714
-1,436
| -46% | -$14.2K |
|
1505
Compugen
CGEN
$128M
| $17K | ﹤0.01% |
1,151
-9,420
| -89% | -$139K |
|
1506
InflaRx
IFRX
$91.5M
| $17K | ﹤0.01% |
+3,715
| New | +$17K |
|
1507
Dr. Reddy's Laboratories
RDY
$12.2B
| $17K | ﹤0.01% |
+1,685
| New | +$17K |
|
1508
Sonic Automotive
SAH
$2.77B
| $17K | ﹤0.01% |
547
-517
| -49% | -$16.1K |
|
1509
StoneX
SNEX
$5.13B
| $17K | ﹤0.01% |
+702
| New | +$17K |
|
|
CKH
1510
DELISTED
Seacor Holdings Inc.
CKH
| $17K | ﹤0.01% |
601
+539
| +869% | +$15.2K |
|
1511
American Superconductor
AMSC
$2.54B
| $16K | ﹤0.01% |
2,077
-3,330
| -62% | -$25.7K |
|
1512
American Tower
AMT
$91.8B
| $16K | ﹤0.01% |
65
| – | – |
|
1513
A10 Networks
ATEN
$1.26B
| $16K | ﹤0.01% |
+2,413
| New | +$16K |
|
1514
Barings BDC
BBDC
$984M
| $16K | ﹤0.01% |
2,055
+1,187
| +137% | +$9.24K |
|
1515
Siren ETF Trust Siren Nasdaq NexGen Economy ETF
BLCN
$49.2M
| $16K | ﹤0.01% |
+580
| New | +$16K |
|
|
DRD
1516
DRDGold
DRD
$1.92B
| $16K | ﹤0.01% |
1,053
-1,402
| -57% | -$21.3K |
|
1517
Entravision Communication
EVC
$216M
| $16K | ﹤0.01% |
11,759
+10,880
| +1,238% | +$14.8K |
|
1518
Ezcorp Inc
EZPW
$1.03B
| $16K | ﹤0.01% |
2,630
+2,099
| +395% | +$12.8K |
|
1519
Gates Industrial
GTES
$6.66B
| $16K | ﹤0.01% |
1,613
-8,674
| -84% | -$86K |
|
1520
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
$17.9B
| $16K | ﹤0.01% |
200
-15,600
| -99% | -$1.25M |
|
|
NOA
1521
North American Construction
NOA
$399M
| $16K | ﹤0.01% |
2,584
-3,034
| -54% | -$18.8K |
|
1522
Super Micro Computer
SMCI
$27B
| $16K | ﹤0.01% |
+5,680
| New | +$16K |
|
1523
ProShares UltraShort Materials
SMN
$793K
| $16K | ﹤0.01% |
+230
| New | +$16K |
|
1524
Team
TISI
$80.9M
| $16K | ﹤0.01% |
+304
| New | +$16K |
|
|
AIFU
1525
AIFU Inc. Class A Ordinary Share
AIFU
$84.1M
| $16K | ﹤0.01% |
+41
| New | +$16K |
|