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 |
Goldman Sachs
GS
|
+$38.4M |
| 2 |
Micron Technology
MU
|
+$23.7M |
| 3 |
NVIDIA
NVDA
|
+$23.6M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$21.7M |
| 5 |
Wells Fargo
WFC
|
+$20.4M |
Top Sells
| 1 |
Citigroup
C
|
+$21.6M |
| 2 |
Apple
AAPL
|
+$17.2M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$13.3M |
| 4 |
Eli Lilly
LLY
|
+$9.69M |
| 5 |
Mastercard
MA
|
+$8.27M |
Sector Composition
| 1 | Technology | 14.2% |
| 2 | Communication Services | 13.46% |
| 3 | Consumer Discretionary | 12.76% |
| 4 | Healthcare | 12.43% |
| 5 | Financials | 10.75% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
ARGS
1601
DELISTED
Argos Therapeutics, Inc.
ARGS
| $5K | ﹤0.01% |
650
+286
| +79% | +$2.2K |
|
|
AIXG
1602
DELISTED
AIXTRON SE
AIXG
| $5K | ﹤0.01% |
1,368
-4,100
| -75% | -$15K |
|
|
PRMW
1603
DELISTED
Primo Water Corporation
PRMW
| $5K | ﹤0.01% |
406
-1,083
| -73% | -$13.3K |
|
|
AHH
1604
Armada Hoffler Properties
AHH
$599M
| $4K | ﹤0.01% |
+305
| New | +$4K |
|
|
AMED
1605
DELISTED
Amedisys
AMED
| $4K | ﹤0.01% |
+80
| New | +$4K |
|
|
BRKL
1606
DELISTED
Brookline Bancorp
BRKL
| $4K | ﹤0.01% |
313
+99
| +46% | +$1.27K |
|
1607
Camtek
CAMT
$3.92B
| $4K | ﹤0.01% |
+1,107
| New | +$4K |
|
1608
CBIZ
CBZ
$2.99B
| $4K | ﹤0.01% |
298
-2,688
| -90% | -$36.1K |
|
1609
Ceragon Networks
CRNT
$200M
| $4K | ﹤0.01% |
1,486
+957
| +181% | +$2.58K |
|
1610
Dana Inc
DAN
$2.69B
| $4K | ﹤0.01% |
221
+141
| +176% | +$2.55K |
|
1611
Diodes
DIOD
$2.54B
| $4K | ﹤0.01% |
200
-363
| -64% | -$7.26K |
|
1612
Enterprise Financial Services Corp
EFSC
$2.2B
| $4K | ﹤0.01% |
+101
| New | +$4K |
|
1613
Integra LifeSciences
IART
$1.16B
| $4K | ﹤0.01% |
+117
| New | +$4K |
|
1614
Immunic
IMUX
$80.4M
| $4K | ﹤0.01% |
27
-7
| -21% | -$1.04K |
|
1615
Lineage Cell Therapeutics
LCTX
$315M
| $4K | ﹤0.01% |
1,472
-3,742
| -72% | -$10.2K |
|
1616
Littelfuse
LFUS
$6.53B
| $4K | ﹤0.01% |
30
| – | – |
|
1617
Marchex
MCHX
$84.8M
| $4K | ﹤0.01% |
1,574
-1,754
| -53% | -$4.46K |
|
1618
Marcus Corp
MCS
$501M
| $4K | ﹤0.01% |
129
+29
| +29% | +$899 |
|
1619
Insight Enterprises
NSIT
$3.79B
| $4K | ﹤0.01% |
+100
| New | +$4K |
|
1620
Odyssey Marine Exploration
OMEX
$75.9M
| $4K | ﹤0.01% |
+1,151
| New | +$4K |
|
1621
Prestige Consumer Healthcare
PBH
$3.11B
| $4K | ﹤0.01% |
+87
| New | +$4K |
|
1622
Ring Energy
REI
$219M
| $4K | ﹤0.01% |
436
-45,741
| -99% | -$420K |
|
1623
ProShares Short Russell2000
RWM
$143M
| $4K | ﹤0.01% |
95
-147
| -61% | -$6.19K |
|
1624
Cassava Sciences
SAVA
$101M
| $4K | ﹤0.01% |
799
+699
| +699% | +$3.5K |
|
1625
Sibanye-Stillwater
SBSW
$6.1B
| $4K | ﹤0.01% |
555
-36,709
| -99% | -$265K |
|