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 | |
|---|---|---|---|---|---|---|
626
CALL
Progressive
PGR
$120B
| $4.52M | 0.01% |
749
-178
| -19% | -$11.8K |
|
|
WP
627
PUT
DELISTED
Worldpay, Inc.
WP
| $4.49M | 0.01% |
587
+383
| +188% | +$33.3K |
|
|
JJT
628
PUT
DELISTED
iPath Series B Bloomberg Tin Subindex Total ReturnSM ETN
JJT
| $4.44M | 0.01% |
970
+849
| +702% | +$40.5K |
|
629
PUT
Affiliated Managers Group
AMG
$9.19B
| $4.41M | 0.01% |
453
+188
| +71% | +$21.2K |
|
630
CALL
Equinix
EQIX
$102B
| $4.41M | 0.01% |
125
+47
| +60% | +$18.3K |
|
631
PUT
Pultegroup
PHM
$23.7B
| $4.39M | 0.01% |
1,690
+717
| +74% | +$17.7K |
|
632
PUT
Pool Corp
POOL
$6.68B
| $4.38M | 0.01% |
295
-75
| -20% | -$11.2K |
|
633
CALL
Devon Energy
DVN
$52.2B
| $4.38M | 0.01% |
1,943
+474
| +32% | +$14.6K |
|
634
PUT
Idexx Laboratories
IDXX
$42.5B
| $4.37M | 0.01% |
235
-105
| -31% | -$21.5K |
|
635
Direxion Daily Gold Miners Index Bull 2X ETF
NUGT
$860M
| $4.36M | 0.01% |
49,849
+49,409
| +11,229% | +$3.63M |
|
636
PUT
Elevance Health
ELV
$82.3B
| $4.36M | 0.01% |
166
-53
| -24% | -$14.6K |
|
637
PUT
Analog Devices
ADI
$185B
| $4.35M | 0.01% |
507
-151
| -23% | -$13.1K |
|
638
PUT
Synchrony
SYF
$23.3B
| $4.35M | 0.01% |
1,854
-48
| -3% | -$1.3K |
|
639
PUT
iShares Silver Trust
SLV
$27.8B
| $4.34M | 0.01% |
2,990
+2,411
| +416% | +$33K |
|
640
PUT
Lear
LEA
$7.14B
| $4.32M | 0.01% |
352
+21
| +6% | +$2.81K |
|
|
CELG
641
DELISTED
Celgene Corp
CELG
| $4.31M | 0.01% |
67,237
+57,070
| +561% | +$4.21M |
|
642
PUT
Mercado Libre
MELI
$91.2B
| $4.3M | 0.01% |
147
-191
| -57% | -$61.9K |
|
643
CALL
Carnival Corporation Ltd
CCL
$34.6B
| $4.3M | 0.01% |
873
-327
| -27% | -$18.7K |
|
644
Nutanix
NTNX
$14.2B
| $4.3M | 0.01% |
103,413
-16,597
| -14% | -$685K |
|
|
645
CALL
Synchrony
SYF
$23.3B
| $4.3M | 0.01% |
1,832
+261
| +17% | +$7.06K |
|
646
CALL
Sysco
SYY
$39.1B
| $4.29M | 0.01% |
685
+264
| +63% | +$17.8K |
|
647
CALL
Canadian Imperial Bank of Commerce
CM
$106B
| $4.27M | 0.01% |
1,146
+708
| +162% | +$30.1K |
|
|
FL
648
CALL
DELISTED
Foot Locker
FL
| $4.26M | 0.01% |
801
-191
| -19% | -$9.59K |
|
649
PUT
XPO
XPO
$25.1B
| $4.25M | 0.01% |
2,154
+1,148
| +114% | +$31.8K |
|
650
CALL
Aflac
AFL
$63.3B
| $4.25M | 0.01% |
932
+439
| +89% | +$19.5K |
|
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.