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 |
Apple
AAPL
|
$186M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
$86.2M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$56.8M |
| 4 |
iShares Silver Trust
SLV
|
$42.9M |
| 5 |
Advanced Micro Devices
AMD
|
$36.5M |
Top Sells
| 1 |
Occidental Petroleum
OXY
|
$44.4M |
| 2 |
Financial Select Sector SPDR Fund
XLF
|
$42.8M |
| 3 |
Verizon
VZ
|
$40.8M |
| 4 |
Direxion Daily S&P 500 Bull 3x Shares
SPXL
|
$33.6M |
| 5 |
iShares China Large-Cap ETF
FXI
|
$33M |
Sector Composition
| 1 | Technology | 23.31% |
| 2 | Consumer Discretionary | 13.02% |
| 3 | Industrials | 8.24% |
| 4 | Healthcare | 7.47% |
| 5 | Financials | 6.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
201
Ovintiv
OVV
$10.6B
| $3.01M | ﹤0.01% |
+55,752
| New | +$3.01M |
|
202
Steel Dynamics
STLD
$19.1B
| $3.01M | ﹤0.01% |
+36,035
| New | +$3.01M |
|
|
SLCA
203
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $3.01M | ﹤0.01% |
161,135
+130,069
| +419% | +$2.43M |
|
204
First Trust NASDAQ Cybersecurity ETF
CIBR
$10.4B
| $3M | ﹤0.01% |
56,529
+42,453
| +302% | +$2.25M |
|
|
WIRE
205
DELISTED
Encore Wire Corp
WIRE
| $2.98M | ﹤0.01% |
26,151
-1,158
| -4% | -$132K |
|
206
Chipotle Mexican Grill
CMG
$56B
| $2.97M | ﹤0.01% |
+1,880
| New | +$2.97M |
|
207
Dayforce
DAY
$11B
| $2.95M | ﹤0.01% |
43,167
+40,831
| +1,748% | +$2.79M |
|
208
United Natural Foods
UNFI
$1.7B
| $2.94M | ﹤0.01% |
71,201
+13,091
| +23% | +$541K |
|
209
Utilities Select Sector SPDR Fund
XLU
$20.8B
| $2.94M | ﹤0.01% |
39,547
-60,200
| -60% | -$4.48M |
|
|
PLAN
210
DELISTED
Anaplan, Inc.
PLAN
| $2.94M | ﹤0.01% |
45,189
+37,081
| +457% | +$2.41M |
|
211
ProShares UltraPro S&P 500
UPRO
$4.43B
| $2.94M | ﹤0.01% |
46,139
-28,212
| -38% | -$6.52M |
|
212
Star Bulk Carriers
SBLK
$2.16B
| $2.92M | ﹤0.01% |
+98,478
| New | +$2.92M |
|
213
Nutrien
NTR
$27.6B
| $2.92M | ﹤0.01% |
28,103
-13,673
| -33% | -$1.42M |
|
214
Upstart Holdings
UPST
$6.2B
| $2.91M | ﹤0.01% |
26,690
-60,161
| -69% | -$6.56M |
|
215
ProShares Short VIX Short-Term Futures ETF
SVXY
$246M
| $2.9M | ﹤0.01% |
+53,200
| New | +$2.9M |
|
216
Albemarle
ALB
$9.43B
| $2.9M | ﹤0.01% |
13,115
-821
| -6% | -$182K |
|
217
CSX Corp
CSX
$60.2B
| $2.85M | ﹤0.01% |
76,142
+12,234
| +19% | +$458K |
|
218
Digital Realty Trust
DLR
$55.1B
| $2.81M | ﹤0.01% |
19,827
+14,168
| +250% | +$2.01M |
|
219
Woodward
WWD
$14.7B
| $2.8M | ﹤0.01% |
22,453
+13,570
| +153% | +$1.69M |
|
220
Fidelity National Information Services
FIS
$35.6B
| $2.79M | ﹤0.01% |
27,745
-17,490
| -39% | -$1.76M |
|
221
WIX.com
WIX
$8.05B
| $2.79M | ﹤0.01% |
26,679
+14,968
| +128% | +$1.56M |
|
222
SPDR S&P MidCap 400 ETF Trust
MDY
$23.6B
| $2.76M | ﹤0.01% |
+5,626
| New | +$2.76M |
|
|
ZNGA
223
DELISTED
ZYNGA INC. CL A COMMON
ZNGA
| $2.75M | ﹤0.01% |
297,519
-267,381
| -47% | -$2.47M |
|
224
Hyatt Hotels
H
$13.7B
| $2.74M | ﹤0.01% |
28,695
+24,783
| +634% | +$2.36M |
|
225
Invesco Senior Loan ETF
BKLN
$6.97B
| $2.74M | ﹤0.01% |
+125,687
| New | +$2.74M |
|