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 |
Financial Select Sector SPDR Fund
XLF
|
$42.3M |
| 2 |
Shopify
SHOP
|
$37.4M |
| 3 |
Verizon
VZ
|
$34M |
| 4 |
iShares China Large-Cap ETF
FXI
|
$33M |
| 5 |
Merck
MRK
|
$28M |
Top Sells
| 1 |
AMC Entertainment Holdings
AMC
|
$38.3M |
| 2 |
Carnival Corp
CCL
|
$37.6M |
| 3 |
GE Aerospace
GE
|
$33M |
| 4 |
Advanced Micro Devices
AMD
|
$30.6M |
| 5 |
Micron Technology
MU
|
$28.3M |
Sector Composition
| 1 | Technology | 20.53% |
| 2 | Consumer Discretionary | 13.81% |
| 3 | Healthcare | 11.39% |
| 4 | Communication Services | 7.32% |
| 5 | Industrials | 6.51% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
301
Campbell Soup
CPB
$10.1B
| $2.1M | ﹤0.01% |
48,380
+2,626
| +6% | +$114K |
|
302
Sabre
SABR
$686M
| $2.1M | ﹤0.01% |
244,663
+183,913
| +303% | +$1.58M |
|
303
United Microelectronic
UMC
$17.3B
| $2.1M | ﹤0.01% |
179,348
+124,314
| +226% | +$1.45M |
|
304
Marathon Petroleum
MPC
$55.1B
| $2.09M | ﹤0.01% |
32,714
-70,807
| -68% | -$4.53M |
|
305
Box
BOX
$4.8B
| $2.09M | ﹤0.01% |
79,645
+23,462
| +42% | +$614K |
|
306
United States Natural Gas Fund
UNG
$626M
| $2.08M | ﹤0.01% |
41,535
+11,409
| +38% | +$570K |
|
307
Cedar Fair
FUN
$2.41B
| $2.07M | ﹤0.01% |
41,431
-11,898
| -22% | -$596K |
|
308
O'Reilly Automotive
ORLY
$90.3B
| $2.06M | ﹤0.01% |
43,830
-38,580
| -47% | -$1.82M |
|
|
SGI
309
Somnigroup International Inc.
SGI
$18.1B
| $2.06M | ﹤0.01% |
43,787
-19,357
| -31% | -$910K |
|
310
SPDR Bloomberg High Yield Bond ETF
JNK
$8.1B
| $2.06M | ﹤0.01% |
+18,951
| New | +$2.06M |
|
311
SPDR Portfolio S&P 1500 Composite Stock Market ETF
SPTM
$11.1B
| $2.06M | ﹤0.01% |
+35,160
| New | +$2.06M |
|
312
Incyte
INCY
$16.9B
| $2.05M | ﹤0.01% |
27,946
-1,601
| -5% | -$118K |
|
313
Innovative Industrial Properties
IIPR
$1.59B
| $2.03M | ﹤0.01% |
7,734
+6,798
| +726% | +$1.79M |
|
314
ResMed
RMD
$40.9B
| $2.03M | ﹤0.01% |
+7,794
| New | +$2.03M |
|
315
Cameco
CCJ
$33.6B
| $2.02M | ﹤0.01% |
92,696
+18,000
| +24% | +$392K |
|
316
Acadia Pharmaceuticals
ACAD
$4.28B
| $2.02M | ﹤0.01% |
86,393
+35,041
| +68% | +$818K |
|
317
Danaher
DHR
$142B
| $2.02M | ﹤0.01% |
+6,915
| New | +$2.02M |
|
318
SPDR S&P Metals & Mining ETF
XME
$2.35B
| $2M | ﹤0.01% |
44,711
-17,805
| -28% | -$797K |
|
319
Vanguard Information Technology ETF
VGT
$101B
| $2M | ﹤0.01% |
+4,363
| New | +$2M |
|
320
KE Holdings
BEKE
$22.7B
| $1.99M | ﹤0.01% |
99,048
+98,956
| +107,561% | +$1.99M |
|
|
IAA
321
DELISTED
IAA, Inc. Common Stock
IAA
| $1.98M | ﹤0.01% |
39,140
+11,385
| +41% | +$576K |
|
322
Direxion Daily Junior Gold Miners Index Bear 2X Shares
JDST
$45M
| $1.98M | ﹤0.01% |
18,298
+15,281
| +506% | +$1.65M |
|
323
Amplify Alternative Harvest ETF
MJ
$178M
| $1.97M | ﹤0.01% |
14,796
+14,779
| +86,935% | +$1.96M |
|
324
Howmet Aerospace
HWM
$72.3B
| $1.97M | ﹤0.01% |
61,787
+21,846
| +55% | +$695K |
|
325
iShares Select U.S. REIT ETF
ICF
$1.91B
| $1.96M | ﹤0.01% |
25,727
+8,126
| +46% | +$618K |
|