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 |
NVIDIA
NVDA
|
+$216M |
| 2 |
Apple
AAPL
|
+$159M |
| 3 |
Broadcom
AVGO
|
+$128M |
| 4 |
Booking.com
BKNG
|
+$62.2M |
| 5 |
SPDR S&P 500 ETF Trust
SPY
|
+$61.9M |
Top Sells
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$141M |
| 2 |
Amazon
AMZN
|
+$53.1M |
| 3 |
TSMC
TSM
|
+$45.7M |
| 4 |
Netflix
NFLX
|
+$45.3M |
| 5 |
Pfizer
PFE
|
+$38.3M |
Sector Composition
| 1 | Technology | 34.74% |
| 2 | Communication Services | 9% |
| 3 | Consumer Discretionary | 8.67% |
| 4 | Healthcare | 8.07% |
| 5 | Financials | 6.4% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1601
iShares MSCI Thailand ETF
THD
$235M
| $26K | ﹤0.01% |
+529
| New | +$26K |
|
1602
Vimeo
VMEO
$1.28B
| $26K | ﹤0.01% |
6,505
+871
| +15% | +$3.48K |
|
1603
VSE Corp
VSEC
$3.4B
| $26K | ﹤0.01% |
202
+42
| +26% | +$5.41K |
|
1604
AdvanSix
ASIX
$576M
| $25K | ﹤0.01% |
1,061
-1,255
| -54% | -$29.6K |
|
1605
Banco Santander Chile
BSAC
$12.1B
| $25K | ﹤0.01% |
+993
| New | +$25K |
|
1606
Columbus McKinnon
CMCO
$415M
| $25K | ﹤0.01% |
1,685
+1,432
| +566% | +$21.2K |
|
1607
Castor Maritime
CTRM
$19.2M
| $25K | ﹤0.01% |
11,689
-1,534
| -12% | -$3.28K |
|
1608
Eve Holding
EVEX
$1.17B
| $25K | ﹤0.01% |
+3,655
| New | +$25K |
|
1609
T-Rex 2X Long Alphabet Daily Target ETF
GOOX
$28.1M
| $25K | ﹤0.01% |
1,034
+737
| +248% | +$17.8K |
|
1610
iShares 25+ Year Treasury STRIPS Bond ETF
GOVZ
$303M
| $25K | ﹤0.01% |
2,679
-2,603
| -49% | -$24.3K |
|
1611
Grifois
GRFS
$6.72B
| $25K | ﹤0.01% |
2,874
-16,553
| -85% | -$144K |
|
1612
Lightwave Logic
LWLG
$417M
| $25K | ﹤0.01% |
20,836
-4,427
| -18% | -$5.31K |
|
1613
Neurogene
NGNE
$271M
| $25K | ﹤0.01% |
1,711
+866
| +102% | +$12.7K |
|
1614
FiscalNote
NOTE
$65.6M
| $25K | ﹤0.01% |
3,989
+2,299
| +136% | +$14.4K |
|
1615
OraSure Technologies
OSUR
$242M
| $25K | ﹤0.01% |
8,610
-8,012
| -48% | -$23.3K |
|
|
PDM
1616
Piedmont Realty Trust, Inc.
PDM
$1.1B
| $25K | ﹤0.01% |
3,481
+2,961
| +569% | +$21.3K |
|
1617
Perion Network
PERI
$418M
| $25K | ﹤0.01% |
2,529
-78,374
| -97% | -$775K |
|
1618
Direxion NASDAQ-100 Equal Weighted Index Shares
QQQE
$1.21B
| $25K | ﹤0.01% |
+256
| New | +$25K |
|
1619
iShares MSCI Japan Small-Cap ETF
SCJ
$149M
| $25K | ﹤0.01% |
297
+190
| +178% | +$16K |
|
1620
UNIFI
UFI
$82.8M
| $25K | ﹤0.01% |
4,969
+4,836
| +3,636% | +$24.3K |
|
|
VLRS
1621
Controladora Vuela Compañía de Aviación
VLRS
$694M
| $25K | ﹤0.01% |
5,282
-1,804
| -25% | -$8.54K |
|
1622
Adtran
ADTN
$809M
| $24K | ﹤0.01% |
+2,709
| New | +$24K |
|
1623
AXT Inc
AXTI
$169M
| $24K | ﹤0.01% |
11,929
-12,573
| -51% | -$25.3K |
|
1624
Calix
CALX
$4.01B
| $24K | ﹤0.01% |
+455
| New | +$24K |
|
1625
Ducommun
DCO
$1.39B
| $24K | ﹤0.01% |
291
-14
| -5% | -$1.16K |
|