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
|
+$29.3M |
| 2 |
Industrial Select Sector SPDR Fund
XLI
|
+$23.1M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$18M |
| 4 |
Netflix
NFLX
|
+$17.4M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14M |
Top Sells
| 1 |
Invesco QQQ Trust
QQQ
|
+$120M |
| 2 |
SPDR S&P 500 ETF Trust
SPY
|
+$41.3M |
| 3 |
Walt Disney
DIS
|
+$26.9M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.8M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.3M |
Sector Composition
| 1 | Technology | 16.22% |
| 2 | Communication Services | 16.19% |
| 3 | Healthcare | 11.36% |
| 4 | Industrials | 9.74% |
| 5 | Consumer Discretionary | 8.61% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
826
Golar LNG
GLNG
$4.17B
| $116K | ﹤0.01% |
+6,326
| New | +$116K |
|
|
SPPI
827
DELISTED
Spectrum Pharmaceuticals Inc
SPPI
| $116K | ﹤0.01% |
13,546
+8,628
| +175% | +$73.9K |
|
828
Corteva
CTVA
$49.3B
| $115K | ﹤0.01% |
+3,891
| New | +$115K |
|
829
Global X SuperDividend ETF
SDIV
$966M
| $115K | ﹤0.01% |
2,232
+2,123
| +1,948% | +$109K |
|
|
VLRS
830
Controladora Vuela Compañía de Aviación
VLRS
$699M
| $114K | ﹤0.01% |
12,169
+9,846
| +424% | +$92.2K |
|
831
Addus HomeCare
ADUS
$2.04B
| $113K | ﹤0.01% |
1,520
-766
| -34% | -$56.9K |
|
832
Diodes
DIOD
$2.47B
| $113K | ﹤0.01% |
3,111
-1,315
| -30% | -$47.8K |
|
833
Indaptus Therapeutics
INDP
$2.71M
| $113K | ﹤0.01% |
12
-24
| -67% | -$226K |
|
834
Tootsie Roll Industries
TR
$2.93B
| $113K | ﹤0.01% |
3,682
+3,652
| +12,173% | +$112K |
|
|
TWO
835
Two Harbors Investment
TWO
$1.05B
| $113K | ﹤0.01% |
2,247
+789
| +54% | +$39.7K |
|
836
Atara Biotherapeutics
ATRA
$83.2M
| $112K | ﹤0.01% |
224
+201
| +874% | +$101K |
|
837
Live Oak Bancshares
LOB
$1.69B
| $112K | ﹤0.01% |
6,587
+5,612
| +576% | +$95.4K |
|
|
PRMW
838
DELISTED
Primo Water Corporation
PRMW
| $111K | ﹤0.01% |
8,375
+8,060
| +2,559% | +$107K |
|
|
LONE
839
DELISTED
Lonestar Resources US Inc. Class A Common Stock
LONE
| $111K | ﹤0.01% |
48,730
+34,178
| +235% | +$77.9K |
|
840
Perdoceo Education
PRDO
$2.27B
| $110K | ﹤0.01% |
5,816
+588
| +11% | +$11.1K |
|
841
SM Energy
SM
$3.09B
| $110K | ﹤0.01% |
8,863
+2,787
| +46% | +$34.6K |
|
842
CarGurus
CARG
$3.59B
| $109K | ﹤0.01% |
3,033
-1,915
| -39% | -$68.8K |
|
843
UGI
UGI
$7.47B
| $109K | ﹤0.01% |
+2,057
| New | +$109K |
|
|
GSB
844
DELISTED
GlobalSCAPE, Inc.
GSB
| $108K | ﹤0.01% |
10,576
-387
| -4% | -$3.95K |
|
|
IBKC
845
DELISTED
IBERIABANK Corp
IBKC
| $108K | ﹤0.01% |
+1,424
| New | +$108K |
|
846
Abbott
ABT
$233B
| $107K | ﹤0.01% |
1,276
-34,252
| -96% | -$2.87M |
|
847
Kforce
KFRC
$564M
| $107K | ﹤0.01% |
3,052
-1,031
| -25% | -$36.1K |
|
848
Natural Resource Partners
NRP
$1.33B
| $107K | ﹤0.01% |
3,031
-1,102
| -27% | -$38.9K |
|
849
LivaNova
LIVN
$3.08B
| $106K | ﹤0.01% |
1,486
+1,140
| +329% | +$81.3K |
|
850
Glaukos
GKOS
$4.84B
| $105K | ﹤0.01% |
1,395
-3,375
| -71% | -$254K |
|