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
|
+$60M |
| 2 |
Microsoft
MSFT
|
+$58.6M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.5M |
| 4 |
PayPal
PYPL
|
+$40.9M |
| 5 |
Netflix
NFLX
|
+$29.7M |
Top Sells
| 1 |
Apple
AAPL
|
+$48.7M |
| 2 |
Walmart
WMT
|
+$45.2M |
| 3 |
Adobe
ADBE
|
+$40.6M |
| 4 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 5 |
Enphase Energy
ENPH
|
+$27.2M |
Sector Composition
| 1 | Technology | 21.17% |
| 2 | Healthcare | 10.87% |
| 3 | Consumer Discretionary | 10.73% |
| 4 | Communication Services | 10.55% |
| 5 | Financials | 7.54% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
451
Lightspeed Commerce
LSPD
$1.64B
| $741K | ﹤0.01% |
43,799
-12,559
| -22% | -$212K |
|
452
Ocular Therapeutix
OCUL
$2.22B
| $736K | ﹤0.01% |
142,822
-1,208
| -0.8% | -$6.23K |
|
453
Elbit Systems
ESLT
$22.7B
| $735K | ﹤0.01% |
+3,518
| New | +$735K |
|
454
Payoneer
PAYO
$2.45B
| $734K | ﹤0.01% |
152,693
+73,319
| +92% | +$352K |
|
|
CPE
455
DELISTED
Callon Petroleum Company
CPE
| $734K | ﹤0.01% |
20,951
-7,681
| -27% | -$269K |
|
|
456
Adobe
ADBE
$150B
| $732K | ﹤0.01% |
1,499
-83,121
| -98% | -$40.6M |
|
457
Direxion Daily S&P 500 Bear 3x Shares
SPXS
$436M
| $730K | ﹤0.01% |
52,288
-312,983
| -86% | -$4.37M |
|
458
JetBlue
JBLU
$1.87B
| $729K | ﹤0.01% |
+82,323
| New | +$729K |
|
459
Sphere Entertainment
SPHR
$1.87B
| $729K | ﹤0.01% |
26,642
+23,165
| +666% | +$634K |
|
460
nCino
NCNO
$3.52B
| $721K | ﹤0.01% |
23,957
+22,940
| +2,256% | +$690K |
|
461
SM Energy
SM
$3B
| $714K | ﹤0.01% |
22,584
+20,589
| +1,032% | +$651K |
|
462
Humana
HUM
$32.8B
| $710K | ﹤0.01% |
1,589
-2,747
| -63% | -$1.23M |
|
463
Xtrackers Harvest CSI 300 China A-Shares ETF
ASHR
$2.3B
| $704K | ﹤0.01% |
+26,326
| New | +$704K |
|
464
Applied Optoelectronics
AAOI
$1.48B
| $701K | ﹤0.01% |
117,732
+85,864
| +269% | +$511K |
|
465
Kodiak Sciences
KOD
$531M
| $700K | ﹤0.01% |
101,463
+96,700
| +2,030% | +$667K |
|
466
Rocket Lab Corporation Common Stock
RKLB
$22.7B
| $700K | ﹤0.01% |
116,707
+74,199
| +175% | +$445K |
|
467
SIGA Technologies
SIGA
$627M
| $700K | ﹤0.01% |
138,662
+18,576
| +15% | +$93.8K |
|
468
Chewy
CHWY
$17.4B
| $699K | ﹤0.01% |
17,732
-123,769
| -87% | -$4.88M |
|
469
Algonquin Power & Utilities
AQN
$4.31B
| $696K | ﹤0.01% |
84,316
+41,379
| +96% | +$342K |
|
470
Protagonist Therapeutics
PTGX
$3.63B
| $696K | ﹤0.01% |
25,214
-37,845
| -60% | -$1.04M |
|
471
Rockwell Automation
ROK
$38.6B
| $696K | ﹤0.01% |
+2,113
| New | +$696K |
|
472
Teradata
TDC
$1.99B
| $696K | ﹤0.01% |
13,041
+4,877
| +60% | +$260K |
|
473
InMode
INMD
$953M
| $683K | ﹤0.01% |
18,296
-16,125
| -47% | -$602K |
|
474
Zillow
ZG
$20.3B
| $682K | ﹤0.01% |
13,880
-16,756
| -55% | -$823K |
|
475
MDU Resources
MDU
$3.28B
| $681K | ﹤0.01% |
+58,767
| New | +$681K |
|