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 | |
|---|---|---|---|---|---|---|
1601
CALL
MGM Resorts International
MGM
$11.7B
| $115K | ﹤0.01% |
2,542
-3,135
| -55% | -$101K |
|
1602
Norwegian Cruise Line
NCLH
$8.89B
| $115K | ﹤0.01% |
2,137
-357
| -14% | -$20K |
|
|
UNIT
1603
PUT
Uniti Group
UNIT
$2.63B
| $115K | ﹤0.01% |
380
+339
| +827% | +$7.16K |
|
|
VRN
1604
DELISTED
Veren
VRN
| $115K | ﹤0.01% |
14,401
+7,383
| +105% | +$53.9K |
|
|
ILG
1605
PUT
DELISTED
ILG, Inc Common Stock
ILG
| $115K | ﹤0.01% |
1,671
+185
| +12% | +$4.89K |
|
|
TESO
1606
DELISTED
Tesco Corp
TESO
| $115K | ﹤0.01% |
21,227
+7,809
| +58% | +$35.8K |
|
|
CAVM
1607
CALL
DELISTED
Cavium, Inc.
CAVM
| $115K | ﹤0.01% |
94
+26
| +38% | +$1.65K |
|
1608
CALL
Akamai
AKAM
$16.8B
| $114K | ﹤0.01% |
695
+338
| +95% | +$16.2K |
|
1609
CALL
Cencora
COR
$60.3B
| $114K | ﹤0.01% |
416
+52
| +14% | +$4.41K |
|
1610
CALL
Cytokinetics
CYTK
$11B
| $114K | ﹤0.01% |
443
+112
| +34% | +$1.53K |
|
1611
CALL
F5
FFIV
$22.1B
| $114K | ﹤0.01% |
239
+165
| +223% | +$19.9K |
|
1612
PUT
HCA Healthcare
HCA
$84.8B
| $114K | ﹤0.01% |
728
+237
| +48% | +$19.1K |
|
1613
PUT
Investcorp Credit Management BDC
ICMB
$11.3M
| $114K | ﹤0.01% |
1,164
+157
| +16% | +$1.55K |
|
1614
PUT
Ionis Pharmaceuticals
IONS
$9.35B
| $114K | ﹤0.01% |
531
-114
| -18% | -$5.97K |
|
1615
PUT
Trade Desk
TTD
$8.13B
| $114K | ﹤0.01% |
2,610
+2,320
| +800% | +$12.5K |
|
|
VOXX
1616
CALL
DELISTED
VOXX International Corporation Class A
VOXX
| $114K | ﹤0.01% |
+845
| New | +$6.38K |
|
|
AKS
1617
CALL
DELISTED
AK Steel Holding Corp
AKS
| $114K | ﹤0.01% |
1,012
+387
| +62% | +$2.21K |
|
1618
CALL
National Beverage
FIZZ
$2.87B
| $113K | ﹤0.01% |
126
-74
| -37% | -$4.1K |
|
1619
PUT
3M
MMM
$89B
| $113K | ﹤0.01% |
3,009
-2,787
| -48% | -$483K |
|
|
TBI
1620
Trueblue
TBI
$234M
| $113K | ﹤0.01% |
5,074
+4,811
| +1,829% | +$109K |
|
1621
Jacobs Solutions
J
$15.9B
| $112K | ﹤0.01% |
2,344
-4,662
| -67% | -$208K |
|
1622
PUT
Cognizant
CTSH
$21.5B
| $111K | ﹤0.01% |
981
+477
| +95% | +$33.5K |
|
1623
Magnachip Semiconductor
MX
$128M
| $111K | ﹤0.01% |
9,791
-14,878
| -60% | -$165K |
|
1624
CALL
Trinity Industries
TRN
$2.97B
| $111K | ﹤0.01% |
729
+498
| +216% | +$10.3K |
|
1625
CALL
Dentsply Sirona
XRAY
$2.59B
| $111K | ﹤0.01% |
+626
| New | +$37.2K |
|
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.