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 |
Alibaba
BABA
|
+$48.9M |
| 2 |
Boeing
BA
|
+$25.8M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.2M |
| 4 |
Biogen
BIIB
|
+$15.8M |
| 5 |
FedEx
FDX
|
+$13.6M |
Top Sells
| 1 |
Alphabet (Google) Class C
GOOG
|
+$62.1M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Industrial Select Sector SPDR Fund
XLI
|
+$17.5M |
| 4 |
Netflix
NFLX
|
+$16.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.6M |
Sector Composition
| 1 | Consumer Discretionary | 16.74% |
| 2 | Technology | 16.32% |
| 3 | Healthcare | 12.17% |
| 4 | Industrials | 12.14% |
| 5 | Communication Services | 7.05% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
451
HealthEquity
HQY
$8.01B
| $395K | ﹤0.01% |
+6,917
| New | +$395K |
|
452
Zymeworks
ZYME
$1.15B
| $392K | ﹤0.01% |
15,832
+3,391
| +27% | +$84K |
|
453
Huntington Ingalls Industries
HII
$10.6B
| $391K | ﹤0.01% |
1,848
+360
| +24% | +$76.2K |
|
454
Coeur Mining
CDE
$9.21B
| $388K | ﹤0.01% |
80,771
+22,963
| +40% | +$110K |
|
455
Caesarstone
CSTE
$48M
| $388K | ﹤0.01% |
23,360
+17,291
| +285% | +$287K |
|
456
Sibanye-Stillwater
SBSW
$6.04B
| $386K | ﹤0.01% |
71,574
+64,755
| +950% | +$349K |
|
|
PTR
457
DELISTED
PETROCHINA COMPANY LIMITED ADS (REP 100 H SHARES)
PTR
| $386K | ﹤0.01% |
7,602
-1,613
| -18% | -$81.9K |
|
|
SBNY
458
DELISTED
Signature Bank
SBNY
| $386K | ﹤0.01% |
+3,239
| New | +$386K |
|
459
Crocs
CROX
$4.55B
| $385K | ﹤0.01% |
13,878
-19,973
| -59% | -$554K |
|
460
Global X MSCI Greece ETF
GREK
$304M
| $384K | ﹤0.01% |
+13,721
| New | +$384K |
|
|
INFN
461
DELISTED
Infinera Corporation Common Stock
INFN
| $382K | ﹤0.01% |
70,216
+27,953
| +66% | +$152K |
|
462
Clearwater Paper
CLW
$355M
| $381K | ﹤0.01% |
+18,064
| New | +$381K |
|
|
PBFX
463
DELISTED
PBF LOGISTICS LP
PBFX
| $381K | ﹤0.01% |
18,059
+9,556
| +112% | +$202K |
|
|
ZNGA
464
DELISTED
ZYNGA INC. CL A COMMON
ZNGA
| $378K | ﹤0.01% |
64,960
+21,092
| +48% | +$123K |
|
465
Digimarc
DMRC
$186M
| $376K | ﹤0.01% |
9,623
+8,288
| +621% | +$324K |
|
466
Marsh & McLennan
MMC
$99.2B
| $375K | ﹤0.01% |
3,751
-4,289
| -53% | -$429K |
|
467
Rayonier Advanced Materials
RYAM
$403M
| $375K | ﹤0.01% |
+86,832
| New | +$375K |
|
468
Silicon Laboratories
SLAB
$4.42B
| $375K | ﹤0.01% |
+3,369
| New | +$375K |
|
469
Mitek Systems
MITK
$456M
| $371K | ﹤0.01% |
38,548
-24,132
| -39% | -$232K |
|
470
Steel Dynamics
STLD
$19.2B
| $371K | ﹤0.01% |
+12,456
| New | +$371K |
|
|
PVTL
471
DELISTED
Pivotal Software, Inc.
PVTL
| $370K | ﹤0.01% |
24,812
+17,894
| +259% | +$267K |
|
472
Devon Energy
DVN
$21.8B
| $367K | ﹤0.01% |
+15,277
| New | +$367K |
|
473
Direxion Daily S&P Biotech Bull 3X Shares
LABU
$717M
| $367K | ﹤0.01% |
+595
| New | +$367K |
|
474
Cal-Maine
CALM
$5.41B
| $366K | ﹤0.01% |
9,176
-10,795
| -54% | -$431K |
|
475
Toyota
TM
$262B
| $366K | ﹤0.01% |
2,728
-4,692
| -63% | -$629K |
|