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 | |
|---|---|---|---|---|---|---|
751
PUT
First Solar
FSLR
$22.1B
| $431K | 0.02% |
1,524
+178
| +13% | +$8.25K |
|
|
SHNY
752
CALL
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $429K | 0.02% |
5,281
-2,728
| -34% | -$28.7K |
|
753
CALL
Workday
WDAY
$31.9B
| $428K | 0.02% |
618
+271
| +78% | +$28K |
|
754
PUT
Lumen
LUMN
$6.81B
| $426K | 0.02% |
1,262
+234
| +23% | +$4.93K |
|
|
COL
755
CALL
DELISTED
Rockwell Collins
COL
| $426K | 0.02% |
359
+237
| +194% | +$28.8K |
|
756
Novanta
NOVT
$5.11B
| $424K | 0.02% |
9,743
+7,495
| +333% | +$291K |
|
757
CALL
Ulta Beauty
ULTA
$20.7B
| $424K | 0.02% |
888
+319
| +56% | +$76.8K |
|
758
Vanguard Dividend Appreciation ETF
VIG
$110B
| $423K | 0.02% |
4,463
+4,371
| +4,751% | +$408K |
|
759
iShares TIPS Bond ETF
TIP
$14.5B
| $422K | 0.02% |
+3,724
| New | +$424K |
|
760
CALL
Coca-Cola
KO
$348B
| $420K | 0.02% |
2,128
-1,825
| -46% | -$83K |
|
761
PUT
Equifax
EFX
$19.4B
| $419K | 0.02% |
806
+775
| +2,500% | +$102K |
|
|
DATA
762
DELISTED
Tableau Software, Inc.
DATA
| $419K | 0.02% |
5,598
-3,127
| -36% | -$217K |
|
763
FerroAtlántica
GSM
$635M
| $417K | 0.02% |
+31,743
| New | +$412K |
|
764
CALL
Royal Caribbean
RCL
$76.2B
| $417K | 0.02% |
599
-362
| -38% | -$42.3K |
|
765
PUT
Radware
RDWR
$1.21B
| $416K | 0.02% |
1,553
+234
| +18% | +$4.06K |
|
|
TGNA
766
DELISTED
TEGNA Inc
TGNA
| $416K | 0.02% |
31,210
+460
| +1% | +$6.17K |
|
|
SIOX
767
PUT
DELISTED
Sio Gene Therapies Inc. Common Stock
SIOX
| $415K | 0.02% |
170
+70
| +70% | +$11.8K |
|
|
ENDP
768
DELISTED
Endo International plc
ENDP
| $413K | 0.02% |
48,318
+4,451
| +10% | +$42.9K |
|
769
PUT
Nabors Industries
NBR
$1.24B
| $412K | 0.02% |
45
-12
| -21% | -$4.39K |
|
|
TVPT
770
DELISTED
Travelport Worldwide Limited
TVPT
| $412K | 0.02% |
26,292
+25,505
| +3,241% | +$373K |
|
771
PUT
Bristol-Myers Squibb
BMY
$126B
| $410K | 0.02% |
3,618
-2,081
| -37% | -$122K |
|
|
CYBR
772
DELISTED
CyberArk
CYBR
| $409K | 0.02% |
9,977
-21,863
| -69% | -$926K |
|
773
CALL
RH
RH
$3.15B
| $409K | 0.02% |
620
-64
| -9% | -$4.01K |
|
774
Viasat
VSAT
$10.2B
| $408K | 0.02% |
+6,349
| New | +$401K |
|
|
ARNA
775
DELISTED
Arena Pharmaceuticals Inc
ARNA
| $408K | 0.02% |
16,005
+15,122
| +1,713% | +$347K |
|
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.