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 |
Amazon
AMZN
|
+$45.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$30.1M |
| 3 |
TWX
Time Warner Inc
TWX
|
+$25.8M |
| 4 |
Booking.com
BKNG
|
+$22.5M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$17.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$43.6M |
| 2 |
Amgen
AMGN
|
+$33.2M |
| 3 |
Baidu
BIDU
|
+$19.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$17.3M |
| 5 |
Micron Technology
MU
|
+$17.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 14.31% |
| 2 | Technology | 13.17% |
| 3 | Communication Services | 11.81% |
| 4 | Healthcare | 4.06% |
| 5 | Financials | 3.84% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
676
World Acceptance Corp
WRLD
$866M
| $494K | 0.02% |
5,963
+3,773
| +172% | +$291K |
|
677
CALL
Five Below
FIVE
$11.3B
| $493K | 0.02% |
446
-357
| -44% | -$17.5K |
|
678
PUT
Electronic Arts
EA
$52.4B
| $492K | 0.02% |
1,596
-567
| -26% | -$65.7K |
|
|
TEN
679
DELISTED
Tenneco Inc. Class A Voting Common Stock
TEN
| $491K | 0.02% |
+8,095
| New | +$455K |
|
680
Petrobras
PBR
$122B
| $490K | 0.02% |
48,900
-71,024
| -59% | -$645K |
|
681
PUT
Trip.com Group
TCOM
$26.8B
| $490K | 0.02% |
2,482
+61
| +3% | +$3.31K |
|
|
AMJ
682
DELISTED
JP Morgan Alerian MLP Index ETN 5/24/24
AMJ
| $490K | 0.02% |
17,395
+12,790
| +278% | +$368K |
|
683
CALL
Alcoa
AA
$12.2B
| $489K | 0.02% |
788
+143
| +22% | +$5.72K |
|
684
Invesco DB Agriculture Fund
DBA
$1.26B
| $489K | 0.02% |
25,792
+22,711
| +737% | +$438K |
|
685
PUT
3D Systems Corp
DDD
$434M
| $488K | 0.02% |
1,677
+812
| +94% | +$11.9K |
|
686
PUT
Range Resources
RRC
$9.06B
| $488K | 0.02% |
1,096
-559
| -34% | -$10.8K |
|
687
PUT
ExxonMobil
XOM
$640B
| $487K | 0.02% |
6,057
-1,861
| -24% | -$148K |
|
688
PUT
PayPal
PYPL
$49B
| $485K | 0.02% |
6,270
+1,062
| +20% | +$63.6K |
|
689
Lands' End
LE
$370M
| $484K | 0.02% |
36,669
+14,271
| +64% | +$186K |
|
690
Mattel
MAT
$4.18B
| $484K | 0.02% |
31,274
+30,243
| +2,933% | +$541K |
|
|
ABB
691
DELISTED
ABB Ltd
ABB
| $484K | 0.02% |
+19,583
| New | +$468K |
|
|
FL
692
PUT
DELISTED
Foot Locker
FL
| $482K | 0.02% |
876
+96
| +12% | +$4.04K |
|
693
CALL
Best Buy
BBY
$18.4B
| $481K | 0.02% |
1,575
+971
| +161% | +$55.6K |
|
694
Johnson Controls International
JCI
$86.9B
| $479K | 0.02% |
+11,903
| New | +$482K |
|
|
TFCFA
695
DELISTED
Twenty-First Century Fox, Inc. Class A
TFCFA
| $479K | 0.02% |
+18,173
| New | +$501K |
|
696
Leidos
LDOS
$13.5B
| $477K | 0.02% |
8,064
+1,069
| +15% | +$59.5K |
|
|
GRUB
697
CALL
DELISTED
Just Eat Takeaway.com N.V. American Depositary Shares
GRUB
| $477K | 0.02% |
309
-149
| -33% | -$15.3K |
|
698
CALL
ProShares UltraShort Health Care
RXD
$3.38M
| $475K | 0.02% |
1,220
+32
| +3% | +$4.2K |
|
|
AJRD
699
CALL
DELISTED
Aerojet Rocketdyne Holdings
AJRD
| $474K | 0.02% |
742
+714
| +2,550% | +$19.2K |
|
|
HYGS
700
DELISTED
Hydrogenics Corp
HYGS
| $474K | 0.02% |
58,203
+6,111
| +12% | +$51.5K |
|
Similar funds
Simplex Trading's Q3 2017 Portfolio in Review
As of Q3 2017, Simplex Trading held 7,357 positions worth $2.45B, up 6.4% from $2.3B the previous quarter. Its ten largest holdings account for 24% of the portfolio.
Simplex Trading's Q3 2017 filing shows 1,313 new, 2,078 increased, 2,339 reduced and 1,500 closed positions. Its largest new stake was iShares Russell 2000 ETF: 214,170 shares worth $31.7M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $43.6M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 14% of assets, up from 9.7% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q3 2017 buy was iShares Russell 2000 ETF: 214,170 shares worth $31.7M.
- Simplex Trading added most to Amazon in Q3 2017, an estimated $45.9M increase.
- Simplex Trading's biggest Q3 2017 reduction was Baidu, cutting an estimated $19.3M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q3 2017, selling an estimated $43.6M.
- Simplex Trading's ten largest holdings make up 24% of its $2.45B portfolio in Q3 2017.
- Simplex Trading opened 1,313 new positions and closed 1,500 in Q3 2017.
- Simplex Trading's portfolio value rose 6.4% quarter-over-quarter to $2.45B.
Based on Simplex Trading's 13F filing for Q3 2017, filed 25 Oct 2017.