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 | |
|---|---|---|---|---|---|---|
|
GBT
351
DELISTED
Global Blood Therapeutics, Inc.
GBT
| $533K | ﹤0.01% |
13,004
+2,986
| +30% | +$122K |
|
352
Peabody Energy
BTU
$2.33B
| $531K | ﹤0.01% |
17,431
-151
| -0.9% | -$4.6K |
|
|
ELLI
353
DELISTED
Ellie Mae Inc
ELLI
| $531K | ﹤0.01% |
+8,465
| New | +$531K |
|
354
SolarEdge
SEDG
$2.04B
| $530K | ﹤0.01% |
15,105
-1,673
| -10% | -$58.7K |
|
355
Microsoft
MSFT
$3.68T
| $528K | ﹤0.01% |
+5,200
| New | +$528K |
|
|
ALXN
356
DELISTED
Alexion Pharmaceuticals Inc
ALXN
| $527K | ﹤0.01% |
5,423
-12,713
| -70% | -$1.24M |
|
357
Autoliv
ALV
$9.58B
| $526K | ﹤0.01% |
7,499
+6,874
| +1,100% | +$482K |
|
358
T Rowe Price
TROW
$23.8B
| $526K | ﹤0.01% |
+5,704
| New | +$526K |
|
359
A10 Networks
ATEN
$1.27B
| $522K | ﹤0.01% |
83,722
+58,996
| +239% | +$368K |
|
|
RDS.B
360
DELISTED
Royal Dutch Shell PLC ADS Class B
RDS.B
| $520K | ﹤0.01% |
8,680
-27,659
| -76% | -$1.66M |
|
361
DexCom
DXCM
$31.6B
| $519K | ﹤0.01% |
17,344
-7,100
| -29% | -$212K |
|
|
LSXMA
362
DELISTED
Liberty Media Corporation Series A Liberty SiriusXM Common Stock
LSXMA
| $517K | ﹤0.01% |
19,454
+11,607
| +148% | +$308K |
|
363
Vale
VALE
$44.4B
| $512K | ﹤0.01% |
+38,880
| New | +$512K |
|
364
AerCap
AER
$22B
| $511K | ﹤0.01% |
+12,908
| New | +$511K |
|
|
NVTA
365
DELISTED
Invitae Corporation
NVTA
| $511K | ﹤0.01% |
46,266
-21,248
| -31% | -$235K |
|
366
Invesco
IVZ
$9.81B
| $510K | ﹤0.01% |
+30,473
| New | +$510K |
|
367
EQT Corp
EQT
$32.2B
| $507K | ﹤0.01% |
26,857
+492
| +2% | +$9.29K |
|
368
Agios Pharmaceuticals
AGIO
$2.09B
| $501K | ﹤0.01% |
10,875
+6,457
| +146% | +$297K |
|
369
Aptiv
APTV
$17.5B
| $501K | ﹤0.01% |
+8,145
| New | +$501K |
|
|
ROCC
370
DELISTED
Ranger Oil Corporation Class A Common Stock
ROCC
| $499K | ﹤0.01% |
+9,245
| New | +$499K |
|
|
MDR
371
DELISTED
McDermott International
MDR
| $497K | ﹤0.01% |
+76,064
| New | +$497K |
|
372
A.O. Smith
AOS
$10.3B
| $496K | ﹤0.01% |
+11,621
| New | +$496K |
|
373
Synaptics
SYNA
$2.7B
| $495K | ﹤0.01% |
+13,320
| New | +$495K |
|
374
Cboe Global Markets
CBOE
$24.3B
| $494K | ﹤0.01% |
+5,052
| New | +$494K |
|
375
Korn Ferry
KFY
$3.83B
| $494K | ﹤0.01% |
+12,497
| New | +$494K |
|