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 | |
|---|---|---|---|---|---|---|
1251
Methanex
MEOH
$3.04B
| $82K | ﹤0.01% |
+2,495
| New | +$82K |
|
1252
Avidity Biosciences
RNA
$5.79B
| $82K | ﹤0.01% |
+2,896
| New | +$82K |
|
1253
Global X Russell 2000 Covered Call ETF
RYLD
$1.27B
| $82K | ﹤0.01% |
5,501
-15,450
| -74% | -$230K |
|
1254
UFP Technologies
UFPT
$1.51B
| $82K | ﹤0.01% |
337
+332
| +6,640% | +$80.8K |
|
1255
Energy Select Sector SPDR Fund
XLE
$27B
| $82K | ﹤0.01% |
+967
| New | +$82K |
|
1256
Aldeyra Therapeutics
ALDX
$328M
| $81K | ﹤0.01% |
21,183
+16,472
| +350% | +$63K |
|
1257
Finance of America Companies
FOA
$283M
| $81K | ﹤0.01% |
+3,502
| New | +$81K |
|
1258
Phreesia
PHR
$1.46B
| $81K | ﹤0.01% |
+2,875
| New | +$81K |
|
1259
Compañía de Minas Buenaventura
BVN
$5.06B
| $80K | ﹤0.01% |
+4,920
| New | +$80K |
|
1260
Cavco Industries
CVCO
$4.33B
| $80K | ﹤0.01% |
+186
| New | +$80K |
|
1261
Resources Connection
RGP
$171M
| $80K | ﹤0.01% |
15,049
+14,819
| +6,443% | +$78.8K |
|
1262
Sterling Infrastructure
STRL
$9.58B
| $80K | ﹤0.01% |
349
-4,452
| -93% | -$1.02M |
|
1263
Valmont Industries
VMI
$7.5B
| $80K | ﹤0.01% |
245
-52
| -18% | -$17K |
|
1264
Zymeworks
ZYME
$1.2B
| $80K | ﹤0.01% |
6,445
+2,277
| +55% | +$28.3K |
|
1265
Ribbon Communications
RBBN
$682M
| $79K | ﹤0.01% |
19,880
+18,687
| +1,566% | +$74.3K |
|
1266
Myriad Genetics
MYGN
$698M
| $78K | ﹤0.01% |
14,791
+13,516
| +1,060% | +$71.3K |
|
|
SPYQ
1267
Tradr 2X Long SPY Quarterly ETF
SPYQ
$11M
| $78K | ﹤0.01% |
567
+433
| +323% | +$59.6K |
|
1268
Century Aluminum
CENX
$2.41B
| $77K | ﹤0.01% |
+4,290
| New | +$77K |
|
1269
Mattel
MAT
$5.74B
| $77K | ﹤0.01% |
+3,910
| New | +$77K |
|
1270
Zillow
Z
$21.4B
| $77K | ﹤0.01% |
+1,110
| New | +$77K |
|
1271
Immunovant
IMVT
$2.85B
| $76K | ﹤0.01% |
+4,806
| New | +$76K |
|
1272
Las Vegas Sands
LVS
$36.9B
| $76K | ﹤0.01% |
1,754
-71,986
| -98% | -$3.12M |
|
1273
Steris
STE
$24.6B
| $76K | ﹤0.01% |
+320
| New | +$76K |
|
1274
Transcat
TRNS
$699M
| $76K | ﹤0.01% |
+890
| New | +$76K |
|
1275
Enerpac Tool Group
EPAC
$2.29B
| $75K | ﹤0.01% |
+1,850
| New | +$75K |
|