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
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares Russell 2000 ETF
IWM
|
+$58.5M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$56.5M |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$44.1M |
| 4 |
Apple
AAPL
|
+$20.3M |
| 5 |
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
|
+$12.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$109M |
| 2 |
Meta Platforms (Facebook)
META
|
+$62.3M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$36.2M |
| 4 |
Goldman Sachs
GS
|
+$27.1M |
| 5 |
Boeing
BA
|
+$24.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.49% |
| 2 | Consumer Discretionary | 0.48% |
| 3 | Technology | 0.4% |
| 4 | Financials | 0.25% |
| 5 | Industrials | 0.22% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
451
PUT
Yelp
YELP
$1.35B
| $7.01M | 0.02% |
2,005
+1,266
| +171% | +$48.4K |
|
452
PUT
Spotify
SPOT
$96.9B
| $6.96M | 0.02% |
613
-615
| -50% | -$86K |
|
|
RDS.A
453
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $6.94M | 0.02% |
119,172
+86,165
| +261% | +$5.34M |
|
454
CALL
Kimberly-Clark
KMB
$35.5B
| $6.9M | 0.02% |
606
-64
| -10% | -$7.1K |
|
455
CALL
Royal Bank of Canada
RY
$289B
| $6.89M | 0.02% |
1,006
+672
| +201% | +$49.1K |
|
456
PUT
Bausch Health
BHC
$1.67B
| $6.88M | 0.02% |
3,726
+1,376
| +59% | +$32.7K |
|
457
PUT
Vanguard FTSE Europe ETF
VGK
$29.7B
| $6.84M | 0.02% |
1,662
+432
| +35% | +$22.3K |
|
458
CALL
Arista Networks
ANET
$222B
| $6.83M | 0.02% |
5,184
-1,024
| -16% | -$14.7K |
|
|
EXAS
459
PUT
DELISTED
Exact Sciences
EXAS
| $6.82M | 0.02% |
1,081
-637
| -37% | -$43.7K |
|
460
PUT
Sarepta Therapeutics
SRPT
$1.68B
| $6.82M | 0.02% |
625
+290
| +87% | +$36.3K |
|
461
CALL
Ulta Beauty
ULTA
$20.5B
| $6.78M | 0.02% |
277
-208
| -43% | -$57.5K |
|
|
K
462
CALL
DELISTED
Kellanova
K
| $6.77M | 0.02% |
1,265
+789
| +166% | +$47.6K |
|
463
PUT
Match Group
MTCH
$8.69B
| $6.76M | 0.02% |
1,580
-166
| -10% | -$7.63K |
|
464
PUT
Waste Management
WM
$94.8B
| $6.72M | 0.02% |
755
+398
| +111% | +$35.7K |
|
465
CALL
American Electric Power
AEP
$73.3B
| $6.71M | 0.02% |
898
+111
| +14% | +$8.33K |
|
466
CALL
F5
FFIV
$21.9B
| $6.71M | 0.02% |
414
+181
| +78% | +$31.1K |
|
467
PUT
Dell
DELL
$283B
| $6.7M | 0.02% |
2,703
+1,203
| +80% | +$32.9K |
|
468
CALL
Southern Company
SO
$109B
| $6.68M | 0.02% |
1,521
+312
| +26% | +$14.2K |
|
469
Delta Air Lines
DAL
$53.7B
| $6.64M | 0.02% |
132,989
+77,535
| +140% | +$4.22M |
|
|
NLSN
470
CALL
DELISTED
Nielsen Holdings plc
NLSN
| $6.59M | 0.02% |
2,825
+1,870
| +196% | +$48.4K |
|
471
CALL
McKesson
MCK
$96B
| $6.56M | 0.02% |
594
+143
| +32% | +$17.8K |
|
|
CGC
472
PUT
Canopy Growth
CGC
$379M
| $6.55M | 0.02% |
244
-108
| -31% | -$40.6K |
|
473
CALL
W.W. Grainger
GWW
$64.1B
| $6.49M | 0.02% |
230
-185
| -45% | -$55K |
|
474
PUT
RH
RH
$3.15B
| $6.49M | 0.02% |
542
-88
| -14% | -$10.6K |
|
|
TFCFA
475
DELISTED
Twenty-First Century Fox, Inc. Class A
TFCFA
| $6.44M | 0.02% |
+133,770
| New | +$6.34M |
|
Similar funds
Simplex Trading's Q4 2018 Portfolio in Review
As of Q4 2018, Simplex Trading held 8,576 positions worth $34.1B, up 9.5% from $31.1B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q4 2018 filing shows 1,199 new, 2,701 increased, 2,877 reduced and 1,573 closed positions. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M. The largest sale was Amazon, an estimated $109M.
By sector, the portfolio is most concentrated in Communication Services at 0.49% of assets, down from 0.89% a quarter earlier, followed by Consumer Discretionary and Technology.
- Simplex Trading's largest Q4 2018 buy was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q4 2018, an estimated $58.5M increase.
- Simplex Trading's biggest Q4 2018 reduction was Amazon, cutting an estimated $109M.
- Simplex Trading fully exited Meta Platforms (Facebook) in Q4 2018, selling an estimated $62.3M.
- Simplex Trading's ten largest holdings make up 43% of its $34.1B portfolio in Q4 2018.
- Simplex Trading opened 1,199 new positions and closed 1,573 in Q4 2018.
- Simplex Trading's portfolio value rose 9.5% quarter-over-quarter to $34.1B.
Based on Simplex Trading's 13F filing for Q4 2018, filed 16 Jan 2019.