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 | Miscellaneous | 39.59% |
| 2 | Consumer Discretionary | 14.54% |
| 3 | Technology | 13.33% |
| 4 | Communication Services | 11.89% |
| 5 | Healthcare | 4.58% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
601
Suncor Energy
SU
$78.8B
| $570K | 0.02% |
16,274
+14,976
| +1,154% | +$478K |
|
|
EXAS
602
CALL
DELISTED
Exact Sciences
EXAS
| $569K | 0.02% |
674
+279
| +71% | +$11.2K |
|
|
VIAB
603
DELISTED
Viacom Inc. Class B
VIAB
| $568K | 0.02% |
20,429
+11,337
| +125% | +$350K |
|
604
Transocean
RIG
$6.53B
| $567K | 0.02% |
52,778
+35,432
| +204% | +$305K |
|
605
CALL
Honeywell
HON
$66.4B
| $566K | 0.02% |
1,262
-415
| -25% | -$51.5K |
|
606
Baker Hughes
BKR
$63B
| $565K | 0.02% |
+15,451
| New | +$548K |
|
607
CALL
Skyworks Solutions
SWKS
$11.1B
| $565K | 0.02% |
698
-112
| -14% | -$11.6K |
|
|
ATVI
608
PUT
DELISTED
Activision Blizzard
ATVI
| $565K | 0.02% |
2,351
+501
| +27% | +$31.3K |
|
609
Ameriprise Financial
AMP
$49.5B
| $564K | 0.02% |
+3,801
| New | +$531K |
|
|
JUNO
610
CALL
DELISTED
Juno Therapeutics, Inc.
JUNO
| $562K | 0.02% |
593
+68
| +13% | +$2.32K |
|
611
CALL
Live Nation Entertainment
LYV
$40.4B
| $561K | 0.02% |
929
+86
| +10% | +$3.34K |
|
612
ProShares Ultra NASDAQ Biotechnology
BIB
$104M
| $560K | 0.02% |
+9,149
| New | +$520K |
|
|
EGN
613
DELISTED
Energen
EGN
| $560K | 0.02% |
10,252
-11,737
| -53% | -$598K |
|
614
Textron
TXT
$13.6B
| $559K | 0.02% |
+10,390
| New | +$516K |
|
615
Philips
PHG
$25.3B
| $556K | 0.02% |
17,789
-4,083
| -19% | -$119K |
|
616
CALL
iShares MSCI Global Gold Miners ETF
RING
$2.53B
| $552K | 0.02% |
2,907
+951
| +49% | +$17.8K |
|
617
Tenaris
TS
$28.5B
| $552K | 0.02% |
19,524
+7,395
| +61% | +$216K |
|
618
PUT
Wells Fargo
WFC
$272B
| $549K | 0.02% |
3,947
-2,755
| -41% | -$146K |
|
|
HES
619
CALL
DELISTED
Hess
HES
| $548K | 0.02% |
1,819
+247
| +16% | +$10.4K |
|
|
GGP
620
DELISTED
GGP Inc.
GGP
| $548K | 0.02% |
26,431
-31,047
| -54% | -$679K |
|
621
Star Bulk Carriers
SBLK
$3.62B
| $547K | 0.02% |
56,385
+14,121
| +33% | +$147K |
|
|
TYNS
622
CALL
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $547K | 0.02% |
1,547
+104
| +7% | +$2.91K |
|
623
Bath & Body Works
BBWI
$3.93B
| $546K | 0.02% |
16,246
+4,850
| +43% | +$163K |
|
624
CALL
Dollar General
DG
$29.4B
| $546K | 0.02% |
459
-670
| -59% | -$50.2K |
|
625
Vanguard FTSE Europe ETF
VGK
$31.1B
| $546K | 0.02% |
9,371
+7,154
| +323% | +$406K |
|
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 Miscellaneous at 40% of assets, down from 40% a quarter earlier, followed by Consumer Discretionary and Technology.
- 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.