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 |
Alphabet (Google) Class C
GOOG
|
+$54.6M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$52.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
+$40.9M |
| 4 |
Apple
AAPL
|
+$16.5M |
| 5 |
Visa
V
|
+$12M |
Top Sells
| 1 |
Amazon
AMZN
|
+$98.7M |
| 2 |
Meta Platforms (Facebook)
META
|
+$70.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$33.4M |
| 4 |
Goldman Sachs
GS
|
+$30.2M |
| 5 |
Boeing
BA
|
+$26.5M |
Sector Composition
| 1 | Communication Services | 14.71% |
| 2 | Consumer Discretionary | 14.32% |
| 3 | Technology | 11.86% |
| 4 | Financials | 7.38% |
| 5 | Industrials | 6.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
GWPH
451
DELISTED
GW Pharmaceuticals Plc American Depositary Shares
GWPH
| $365K | ﹤0.01% |
3,756
-20,535
| -85% | -$2M |
|
|
LX
452
LexinFintech Holdings
LX
$1.01B
| $361K | ﹤0.01% |
49,844
+20,703
| +71% | +$150K |
|
453
Merck
MRK
$211B
| $361K | ﹤0.01% |
+4,964
| New | +$361K |
|
|
CSOD
454
DELISTED
Cornerstone OnDemand, Inc.
CSOD
| $359K | ﹤0.01% |
+7,138
| New | +$359K |
|
455
AGCO
AGCO
$8.03B
| $357K | ﹤0.01% |
+6,414
| New | +$357K |
|
456
ON Semiconductor
ON
$19.9B
| $357K | ﹤0.01% |
21,638
+5,575
| +35% | +$92K |
|
457
Premier
PINC
$2.24B
| $352K | ﹤0.01% |
+9,431
| New | +$352K |
|
458
Toro Company
TTC
$7.71B
| $352K | ﹤0.01% |
6,314
+4,765
| +308% | +$266K |
|
|
TWTR
459
DELISTED
Twitter, Inc.
TWTR
| $350K | ﹤0.01% |
12,198
-332,030
| -96% | -$9.53M |
|
460
Baytex Energy
BTE
$1.71B
| $349K | ﹤0.01% |
198,610
+89,276
| +82% | +$157K |
|
461
Equinix
EQIX
$76.3B
| $349K | ﹤0.01% |
+990
| New | +$349K |
|
462
Alliant Energy
LNT
$16.4B
| $349K | ﹤0.01% |
+8,262
| New | +$349K |
|
463
Teladoc Health
TDOC
$1.38B
| $349K | ﹤0.01% |
7,060
-3,489
| -33% | -$172K |
|
464
Nasdaq
NDAQ
$54.4B
| $346K | ﹤0.01% |
+12,744
| New | +$346K |
|
|
MXWL
465
DELISTED
Maxwell Technologies Inc
MXWL
| $345K | ﹤0.01% |
166,709
+115,391
| +225% | +$239K |
|
|
ZGNX
466
DELISTED
Zogenix, Inc.
ZGNX
| $345K | ﹤0.01% |
9,464
-7,604
| -45% | -$277K |
|
467
HF Sinclair
DINO
$9.81B
| $344K | ﹤0.01% |
+6,747
| New | +$344K |
|
468
Indaptus Therapeutics
INDP
$2.98M
| $344K | ﹤0.01% |
+20
| New | +$344K |
|
469
L3Harris
LHX
$50.6B
| $344K | ﹤0.01% |
+2,560
| New | +$344K |
|
|
STML
470
DELISTED
Stemline Therapeutics, Inc.
STML
| $344K | ﹤0.01% |
36,307
+27,037
| +292% | +$256K |
|
471
Kennedy-Wilson Holdings
KW
$1.2B
| $341K | ﹤0.01% |
+18,771
| New | +$341K |
|
|
DISCA
472
DELISTED
Discovery, Inc. Series A Common Stock
DISCA
| $341K | ﹤0.01% |
+13,803
| New | +$341K |
|
473
Kellanova
K
$27.6B
| $340K | ﹤0.01% |
+6,352
| New | +$340K |
|
474
Itaú Unibanco
ITUB
$75.4B
| $339K | ﹤0.01% |
+49,587
| New | +$339K |
|
475
Plains GP Holdings
PAGP
$3.66B
| $337K | ﹤0.01% |
+16,775
| New | +$337K |
|