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 |
iShares Russell 2000 ETF
IWM
|
+$27.5M |
| 2 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$16.3M |
| 3 |
Walt Disney
DIS
|
+$13.9M |
| 4 |
iShares MSCI Emerging Markets ETF
EEM
|
+$10.4M |
| 5 |
Gilead Sciences
GILD
|
+$10.4M |
Top Sells
| 1 |
Alphabet (Google) Class C
GOOG
|
+$95.3M |
| 2 |
Apple
AAPL
|
+$21.1M |
| 3 |
Meta Platforms (Facebook)
META
|
+$20M |
| 4 |
IBM
IBM
|
+$13.4M |
| 5 |
Baidu
BIDU
|
+$12.1M |
Sector Composition
| 1 | Healthcare | 13.63% |
| 2 | Communication Services | 9.81% |
| 3 | Consumer Discretionary | 9.7% |
| 4 | Technology | 9.67% |
| 5 | Financials | 9.48% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
401
Suburban Propane Partners
SPH
$1.2B
| $246K | 0.02% |
+7,512
| New | +$246K |
|
402
Restaurant Brands International
QSR
$20.3B
| $245K | 0.02% |
6,830
+2,692
| +65% | +$96.6K |
|
403
ProShares UltraPro Russell2000
URTY
$395M
| $245K | 0.02% |
+7,144
| New | +$245K |
|
|
ITCI
404
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $245K | 0.02% |
+6,143
| New | +$245K |
|
|
XLRN
405
DELISTED
Acceleron Pharma Inc.
XLRN
| $245K | 0.02% |
+9,852
| New | +$245K |
|
|
MDCO
406
DELISTED
Medicines Co
MDCO
| $245K | 0.02% |
6,471
-10,054
| -61% | -$381K |
|
407
Akamai
AKAM
$11.2B
| $244K | 0.02% |
+3,538
| New | +$244K |
|
408
Nu Skin
NUS
$570M
| $244K | 0.02% |
5,911
-3,353
| -36% | -$138K |
|
409
Northrop Grumman
NOC
$83.3B
| $242K | 0.02% |
1,461
-1,194
| -45% | -$198K |
|
|
NAV
410
DELISTED
Navistar International
NAV
| $240K | 0.02% |
18,906
+12,158
| +180% | +$154K |
|
|
CXO
411
DELISTED
CONCHO RESOURCES INC.
CXO
| $240K | 0.02% |
+2,447
| New | +$240K |
|
412
Landstar System
LSTR
$4.56B
| $239K | 0.02% |
+3,780
| New | +$239K |
|
|
ATHN
413
DELISTED
Athenahealth, Inc.
ATHN
| $239K | 0.02% |
+1,799
| New | +$239K |
|
414
ProShares UltraPro Short QQQ
SQQQ
$2.27B
| $237K | 0.02% |
+5
| New | +$237K |
|
415
SPDR S&P Biotech ETF
XBI
$5.48B
| $237K | 0.02% |
+3,823
| New | +$237K |
|
416
Hilton Worldwide
HLT
$65.3B
| $236K | 0.02% |
3,437
+869
| +34% | +$59.7K |
|
417
Trimble
TRMB
$19.3B
| $236K | 0.02% |
14,378
+13,268
| +1,195% | +$218K |
|
418
Westlake Corp
WLK
$11B
| $236K | 0.02% |
4,562
+4,144
| +991% | +$214K |
|
|
AMAG
419
DELISTED
AMAG Pharmaceuticals, Inc.
AMAG
| $235K | 0.02% |
5,919
+1,252
| +27% | +$49.7K |
|
|
SHLM
420
DELISTED
Schulman (A.) Inc
SHLM
| $235K | 0.02% |
7,261
+5,346
| +279% | +$173K |
|
421
Ambac
AMBC
$426M
| $234K | 0.02% |
16,194
+14,367
| +786% | +$208K |
|
422
Edwards Lifesciences
EW
$46.9B
| $233K | 0.02% |
9,852
+1,986
| +25% | +$47K |
|
423
Advanced Micro Devices
AMD
$253B
| $232K | 0.02% |
135,059
+121,316
| +883% | +$208K |
|
424
ProShares UltraShort Silver
ZSL
$20.1M
| $232K | 0.02% |
+238
| New | +$232K |
|
425
Encore Capital Group
ECPG
$1.03B
| $231K | 0.02% |
6,246
+6,196
| +12,392% | +$229K |
|