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 |
Microsoft
MSFT
|
+$101M |
| 2 |
NVIDIA
NVDA
|
+$66M |
| 3 |
Citigroup
C
|
+$51.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$42.7M |
| 5 |
SPDR Gold Trust
GLD
|
+$39.4M |
Top Sells
| 1 |
Apple
AAPL
|
+$411M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$64M |
| 3 |
Meta Platforms (Facebook)
META
|
+$39.8M |
| 4 |
iShares Core S&P 500 ETF
IVV
|
+$34.3M |
| 5 |
PayPal
PYPL
|
+$32.9M |
Sector Composition
| 1 | Technology | 17.4% |
| 2 | Financials | 12.04% |
| 3 | Consumer Discretionary | 10.17% |
| 4 | Healthcare | 8.63% |
| 5 | Industrials | 6.03% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
GOGL
951
DELISTED
Golden Ocean Group
GOGL
| $171K | ﹤0.01% |
22,964
+6,327
| +38% | +$47.1K |
|
952
WIX.com
WIX
$9.5B
| $170K | ﹤0.01% |
2,183
-22,587
| -91% | -$1.76M |
|
953
Kartoon Studios
TOON
$38.6M
| $168K | ﹤0.01% |
28,076
+20,586
| +275% | +$123K |
|
954
PagSeguro Digital
PAGS
$2.77B
| $167K | ﹤0.01% |
12,681
-943
| -7% | -$12.4K |
|
|
Y
955
DELISTED
Alleghany Corporation
Y
| $167K | ﹤0.01% |
200
-1,956
| -91% | -$1.63M |
|
956
Veeco
VECO
$1.54B
| $166K | ﹤0.01% |
+9,100
| New | +$166K |
|
957
iShares Russell 2000 Growth ETF
IWO
$12.7B
| $165K | ﹤0.01% |
800
| – | – |
|
|
SLCA
958
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $165K | ﹤0.01% |
15,139
+5,028
| +50% | +$54.8K |
|
959
Atomera
ATOM
$106M
| $164K | ﹤0.01% |
16,212
-4,508
| -22% | -$45.6K |
|
960
Navigator Holdings
NVGS
$1.11B
| $164K | ﹤0.01% |
+14,356
| New | +$164K |
|
|
SLI
961
Standard Lithium
SLI
$586M
| $163K | ﹤0.01% |
37,687
-78,985
| -68% | -$342K |
|
962
First Bancorp
FBP
$3.51B
| $161K | ﹤0.01% |
11,813
+8,231
| +230% | +$112K |
|
963
Fluor
FLR
$6.64B
| $161K | ﹤0.01% |
6,490
+5,780
| +814% | +$143K |
|
964
iShares North American Natural Resources ETF
IGE
$622M
| $161K | ﹤0.01% |
4,636
+3,276
| +241% | +$114K |
|
|
PRVB
965
DELISTED
Provention Bio, Inc. Common Stock
PRVB
| $161K | ﹤0.01% |
35,933
-12,433
| -26% | -$55.7K |
|
|
REV
966
DELISTED
Revlon, Inc.
REV
| $161K | ﹤0.01% |
31,091
+5,005
| +19% | +$25.9K |
|
967
Hubbell
HUBB
$23.5B
| $160K | ﹤0.01% |
+721
| New | +$160K |
|
|
SI
968
DELISTED
Silvergate Capital Corporation
SI
| $160K | ﹤0.01% |
+2,128
| New | +$160K |
|
969
Aspen Aerogels
ASPN
$557M
| $159K | ﹤0.01% |
17,249
+15,757
| +1,056% | +$145K |
|
970
Hillman Solutions
HLMN
$1.93B
| $159K | ﹤0.01% |
21,213
+18,284
| +624% | +$137K |
|
971
Direxion Daily Semiconductor Bear 3X Shares
SOXS
$1.18B
| $159K | ﹤0.01% |
225
-1,871
| -89% | -$1.32M |
|
972
Talos Energy
TALO
$1.7B
| $158K | ﹤0.01% |
+9,493
| New | +$158K |
|
|
KNBE
973
DELISTED
KnowBe4, Inc. Class A Common Stock
KNBE
| $158K | ﹤0.01% |
7,597
+2,683
| +55% | +$55.8K |
|
974
Planet Fitness
PLNT
$8.56B
| $157K | ﹤0.01% |
+2,729
| New | +$157K |
|
975
PharmaCyte Biotech
PMCB
$7.2M
| $157K | ﹤0.01% |
65,420
+10,493
| +19% | +$25.2K |
|