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 | |
|---|---|---|---|---|---|---|
651
DXC Technology
DXC
$1.53B
| $513K | 0.02% |
6,912
+6,709
| +3,305% | +$476K |
|
652
CALL
Halliburton
HAL
$27.6B
| $513K | 0.02% |
2,088
-669
| -24% | -$28K |
|
653
Tapestry
TPR
$29B
| $513K | 0.02% |
12,736
+12,636
| +12,636% | +$557K |
|
|
GNC
654
DELISTED
GNC Holdings, Inc.
GNC
| $513K | 0.02% |
58,126
+57,179
| +6,038% | +$514K |
|
|
B
655
CALL
DELISTED
Barnes Group Inc.
B
| $512K | 0.02% |
239
| – | – |
|
656
CALL
Gen Digital
GEN
$15.4B
| $511K | 0.02% |
1,683
-1,356
| -45% | -$41.3K |
|
|
JO
657
DELISTED
iPath Bloomberg Coffee Subindex Total Return ETN due June 24, 2038
JO
| $511K | 0.02% |
30,800
-11,318
| -27% | -$200K |
|
|
B
658
PUT
Barrick Mining
B
$62.8B
| $510K | 0.02% |
2,840
+284
| +11% | +$4.75K |
|
|
BBBY
659
Bed Bath & Beyond
BBBY
$491M
| $508K | 0.02% |
+22,803
| New | +$344K |
|
660
e.l.f. Beauty
ELF
$4.66B
| $507K | 0.02% |
+22,493
| New | +$519K |
|
661
CALL
Humana
HUM
$47.7B
| $507K | 0.02% |
390
-240
| -38% | -$58.8K |
|
|
KBAL
662
DELISTED
Kimball International
KBAL
| $505K | 0.02% |
+25,564
| New | +$436K |
|
|
NEX
663
DELISTED
NexTier Oilfield Solutions Inc.
NEX
| $504K | 0.02% |
30,255
-14,076
| -32% | -$207K |
|
664
CALL
Invesco CurrencyShares Euro Currency Trust
FXE
$332M
| $502K | 0.02% |
2,027
+711
| +54% | +$80.8K |
|
665
CALL
General Dynamics
GD
$101B
| $501K | 0.02% |
531
-113
| -18% | -$22.6K |
|
|
AGN
666
CALL
DELISTED
Allergan plc
AGN
| $501K | 0.02% |
3,142
+228
| +8% | +$53K |
|
667
Zillow
ZG
$7.17B
| $499K | 0.02% |
12,452
+5,486
| +79% | +$232K |
|
668
PUT
Citigroup
C
$222B
| $498K | 0.02% |
8,262
+2,080
| +34% | +$142K |
|
669
Huntington Ingalls Industries
HII
$10.9B
| $498K | 0.02% |
2,201
-340
| -13% | -$70.9K |
|
|
HZN
670
DELISTED
Horizon Global Corporation
HZN
| $498K | 0.02% |
28,232
+17,778
| +170% | +$289K |
|
|
671
PUT
Halliburton
HAL
$27.6B
| $497K | 0.02% |
3,929
-1,784
| -31% | -$74.7K |
|
|
HOME
672
DELISTED
At Home Group Inc.
HOME
| $497K | 0.02% |
+21,777
| New | +$501K |
|
|
TSRO
673
PUT
DELISTED
TESARO, Inc.
TSRO
| $497K | 0.02% |
331
-7
| -2% | -$869 |
|
674
RenaissanceRe
RNR
$13.6B
| $496K | 0.02% |
+3,676
| New | +$517K |
|
675
CALL
Cisco
CSCO
$442B
| $494K | 0.02% |
2,714
-1,864
| -41% | -$59.3K |
|
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.