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 | |
|---|---|---|---|---|---|---|
1651
Apple Hospitality REIT
APLE
$3.96B
| $107K | ﹤0.01% |
+5,710
| New | +$105K |
|
1652
PUT
Copa Holdings
CPA
$5.56B
| $107K | ﹤0.01% |
298
+104
| +54% | +$13.2K |
|
1653
Ooma
OOMA
$550M
| $107K | ﹤0.01% |
10,215
-3,327
| -25% | -$29.3K |
|
1654
CALL
Southern Company
SO
$110B
| $107K | ﹤0.01% |
804
-290
| -27% | -$14.1K |
|
|
NBIS
1655
CALL
Nebius Group N.V.
NBIS
$47.7B
| $107K | ﹤0.01% |
336
-449
| -57% | -$13.7K |
|
|
FNSR
1656
DELISTED
Finisar Corp
FNSR
| $107K | ﹤0.01% |
4,867
-91,085
| -95% | -$2.23M |
|
1657
CALL
Canadian Imperial Bank of Commerce
CM
$107B
| $106K | ﹤0.01% |
626
-104
| -14% | -$4.45K |
|
1658
PUT
EOG Resources
EOG
$78B
| $106K | ﹤0.01% |
1,790
+822
| +85% | +$74.2K |
|
1659
Edgewell Personal Care
EPC
$1.27B
| $106K | ﹤0.01% |
1,458
-1,972
| -57% | -$145K |
|
1660
PUT
LSB Industries
LXU
$881M
| $106K | ﹤0.01% |
+618
| New | +$3.7K |
|
1661
CALL
Marvell Technology
MRVL
$174B
| $106K | ﹤0.01% |
371
-51
| -12% | -$849 |
|
1662
CALL
Oneok
OKE
$58.7B
| $106K | ﹤0.01% |
1,489
+759
| +104% | +$41K |
|
|
SCHW
1663
CALL
Charles Schwab
SCHW
$177B
| $106K | ﹤0.01% |
487
-1,473
| -75% | -$61.2K |
|
|
MNDT
1664
PUT
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $106K | ﹤0.01% |
1,991
+1,010
| +103% | +$15.5K |
|
|
COHR
1665
CALL
DELISTED
Coherent Inc
COHR
| $106K | ﹤0.01% |
196
+166
| +553% | +$40K |
|
1666
CALL
Beazer Homes USA
BZH
$907M
| $105K | ﹤0.01% |
339
+303
| +842% | +$4.61K |
|
1667
CALL
Melco Resorts & Entertainment
MLCO
$2.1B
| $105K | ﹤0.01% |
142
-15
| -10% | -$326 |
|
1668
Steris
STE
$20.9B
| $105K | ﹤0.01% |
+1,196
| New | +$101K |
|
1669
CALL
Suncor Energy
SU
$77.7B
| $105K | ﹤0.01% |
695
-78
| -10% | -$2.49K |
|
1670
CALL
Tower Semiconductor
TSEM
$26.4B
| $105K | ﹤0.01% |
234
+78
| +50% | +$2.13K |
|
1671
CALL
Wayfair
W
$11.1B
| $105K | ﹤0.01% |
586
+475
| +428% | +$35.3K |
|
|
PTR
1672
DELISTED
PETROCHINA COMPANY LIMITED ADS (REP 100 H SHARES)
PTR
| $105K | ﹤0.01% |
+1,641
| New | +$104K |
|
1673
PUT
Cisco
CSCO
$450B
| $104K | ﹤0.01% |
898
-764
| -46% | -$24.3K |
|
1674
Kodak
KODK
$806M
| $104K | ﹤0.01% |
14,217
+10,127
| +248% | +$84.2K |
|
|
SCIU
1675
CALL
DELISTED
Global X Scientific Beta US ETF
SCIU
| $104K | ﹤0.01% |
362
+243
| +204% | +$7.06K |
|
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.