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 | |
|---|---|---|---|---|---|---|
|
XONE
1326
DELISTED
The ExOne Company
XONE
| $18K | ﹤0.01% |
1,947
+1,067
| +121% | +$9.86K |
|
|
HMSY
1327
DELISTED
HMS Holdings Corp.
HMSY
| $18K | ﹤0.01% |
+571
| New | +$18K |
|
|
NBRV
1328
DELISTED
Nabriva Therapeutics plc Ordinary Shares Ireland
NBRV
| $18K | ﹤0.01% |
31
-37
| -54% | -$21.5K |
|
1329
ADT
ADT
$7.24B
| $17K | ﹤0.01% |
2,898
-39,881
| -93% | -$234K |
|
1330
Barings BDC
BBDC
$978M
| $17K | ﹤0.01% |
1,753
-2,419
| -58% | -$23.5K |
|
1331
Comstock Resources
CRK
$4.67B
| $17K | ﹤0.01% |
3,083
+969
| +46% | +$5.34K |
|
1332
Cytosorbents Corp
CTSO
$58.9M
| $17K | ﹤0.01% |
2,572
+1,158
| +82% | +$7.65K |
|
|
DHC
1333
Diversified Healthcare Trust
DHC
$1.07B
| $17K | ﹤0.01% |
2,157
+1,791
| +489% | +$14.1K |
|
1334
Mustang Bio
MBIO
$11.4M
| $17K | ﹤0.01% |
+6
| New | +$17K |
|
1335
NMI Holdings
NMIH
$3.08B
| $17K | ﹤0.01% |
602
-96
| -14% | -$2.71K |
|
1336
Navios Maritime Partners
NMM
$1.4B
| $17K | ﹤0.01% |
+1,275
| New | +$17K |
|
1337
Rogers Communications
RCI
$19.3B
| $17K | ﹤0.01% |
+331
| New | +$17K |
|
1338
StoneX
SNEX
$5.04B
| $17K | ﹤0.01% |
979
-31,403
| -97% | -$545K |
|
1339
Cheesecake Factory
CAKE
$2.82B
| $16K | ﹤0.01% |
+384
| New | +$16K |
|
1340
Diana Shipping
DSX
$225M
| $16K | ﹤0.01% |
7,205
+1,854
| +35% | +$4.12K |
|
1341
Evolent Health
EVH
$1.05B
| $16K | ﹤0.01% |
2,093
-942
| -31% | -$7.2K |
|
1342
First American
FAF
$6.87B
| $16K | ﹤0.01% |
+311
| New | +$16K |
|
1343
FedEx
FDX
$54.2B
| $16K | ﹤0.01% |
+100
| New | +$16K |
|
1344
Great Lakes Dredge & Dock
GLDD
$821M
| $16K | ﹤0.01% |
+1,488
| New | +$16K |
|
1345
LXP Industrial Trust
LXP
$2.72B
| $16K | ﹤0.01% |
1,763
+759
| +76% | +$6.89K |
|
|
MSB
1346
Mesabi Trust
MSB
$412M
| $16K | ﹤0.01% |
+547
| New | +$16K |
|
|
NAK
1347
Northern Dynasty Minerals
NAK
$452M
| $16K | ﹤0.01% |
27,597
+27,199
| +6,834% | +$15.8K |
|
1348
Open Text
OTEX
$9.07B
| $16K | ﹤0.01% |
+399
| New | +$16K |
|
1349
Rockwell Medical
RMTI
$55.8M
| $16K | ﹤0.01% |
+488
| New | +$16K |
|
1350
ProShares UltraShort Russell2000
TWM
$33.7M
| $16K | ﹤0.01% |
55
-10
| -15% | -$2.91K |
|