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 | |
|---|---|---|---|---|---|---|
176
Alpha Metallurgical Resources
AMR
$1.91B
| $2.75M | ﹤0.01% |
20,106
-5,965
| -23% | -$816K |
|
177
Stratasys
SSYS
$871M
| $2.7M | ﹤0.01% |
+187,071
| New | +$2.7M |
|
178
Akero Therapeutics
AKRO
$3.58B
| $2.67M | ﹤0.01% |
78,371
+78,268
| +75,988% | +$2.66M |
|
179
American Tower
AMT
$92.9B
| $2.66M | ﹤0.01% |
+12,402
| New | +$2.66M |
|
180
Alexandria Real Estate Equities
ARE
$14.5B
| $2.66M | ﹤0.01% |
+18,980
| New | +$2.66M |
|
181
Nova
NVMI
$7.58B
| $2.59M | ﹤0.01% |
30,392
+4,485
| +17% | +$383K |
|
182
SPDR S&P Metals & Mining ETF
XME
$2.35B
| $2.56M | ﹤0.01% |
60,185
+8,376
| +16% | +$356K |
|
183
SS&C Technologies
SSNC
$21.7B
| $2.55M | ﹤0.01% |
+53,360
| New | +$2.55M |
|
184
Fomento Económico Mexicano
FMX
$29.6B
| $2.53M | ﹤0.01% |
40,287
+33,854
| +526% | +$2.12M |
|
|
EXE
185
Expand Energy Corporation Common Stock
EXE
$22.7B
| $2.51M | ﹤0.01% |
+26,677
| New | +$2.51M |
|
186
Invesco DB US Dollar Index Bearish Fund
UDN
$147M
| $2.51M | ﹤0.01% |
146,842
+122,559
| +505% | +$2.1M |
|
187
Sibanye-Stillwater
SBSW
$6.08B
| $2.47M | ﹤0.01% |
265,222
+81,063
| +44% | +$755K |
|
188
Crocs
CROX
$4.72B
| $2.44M | ﹤0.01% |
35,602
+8,837
| +33% | +$607K |
|
189
Vermilion Energy
VET
$1.12B
| $2.38M | ﹤0.01% |
111,320
-91,598
| -45% | -$1.96M |
|
190
Steel Dynamics
STLD
$19.8B
| $2.37M | ﹤0.01% |
33,451
-17,476
| -34% | -$1.24M |
|
191
Elanco Animal Health
ELAN
$9.16B
| $2.33M | ﹤0.01% |
187,690
+123,066
| +190% | +$1.53M |
|
|
192
Apple
AAPL
$3.56T
| $2.31M | ﹤0.01% |
16,700
-2,974,785
| -99% | -$411M |
|
193
Goodyear
GT
$2.43B
| $2.28M | ﹤0.01% |
226,320
+209,483
| +1,244% | +$2.11M |
|
194
AGNC Investment
AGNC
$10.8B
| $2.28M | ﹤0.01% |
+271,083
| New | +$2.28M |
|
195
Dollar Tree
DLTR
$20.6B
| $2.28M | ﹤0.01% |
16,724
+13,507
| +420% | +$1.84M |
|
196
Real Estate Select Sector SPDR Fund
XLRE
$7.66B
| $2.27M | ﹤0.01% |
63,063
+18,054
| +40% | +$650K |
|
197
iShares Core S&P Small-Cap ETF
IJR
$86B
| $2.26M | ﹤0.01% |
+25,977
| New | +$2.26M |
|
198
Consolidated Edison
ED
$35.4B
| $2.21M | ﹤0.01% |
+25,733
| New | +$2.21M |
|
199
Palo Alto Networks
PANW
$130B
| $2.2M | ﹤0.01% |
26,916
+11,712
| +77% | +$959K |
|
200
Lennar Class A
LEN
$36.7B
| $2.2M | ﹤0.01% |
30,421
-22,613
| -43% | -$1.63M |
|