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 | |
|---|---|---|---|---|---|---|
726
PUT
ConocoPhillips
COP
$145B
| $447K | 0.02% |
3,676
-1,716
| -32% | -$77.1K |
|
727
Quanta Services
PWR
$96.5B
| $447K | 0.02% |
+11,988
| New | +$420K |
|
|
CONN
728
CALL
DELISTED
Conn's Inc.
CONN
| $447K | 0.02% |
548
+194
| +55% | +$4.07K |
|
729
Arrow Electronics
ARW
$11.2B
| $446K | 0.02% |
5,556
+2,519
| +83% | +$199K |
|
730
CALL
DuPont de Nemours
DD
$18.9B
| $446K | 0.02% |
482
-419
| -47% | -$69.9K |
|
731
Northrop Grumman
NOC
$74.6B
| $446K | 0.02% |
1,553
-5,002
| -76% | -$1.35M |
|
732
Euronet Worldwide
EEFT
$2.97B
| $444K | 0.02% |
+4,691
| New | +$445K |
|
733
ProShares UltraPro Short QQQ
SQQQ
$2.02B
| $444K | 0.02% |
+7
| New | +$497K |
|
734
Darden Restaurants
DRI
$22.2B
| $443K | 0.02% |
+5,633
| New | +$475K |
|
735
CALL
Snap
SNAP
$7.52B
| $443K | 0.02% |
3,278
-4,153
| -56% | -$60.1K |
|
736
Ares Capital
ARCC
$13.5B
| $441K | 0.02% |
+26,907
| New | +$436K |
|
737
PUT
iShares Morningstar Value ETF
ILCV
$1.3B
| $440K | 0.02% |
8,518
-4,462
| -34% | -$217K |
|
|
SAGE
738
PUT
DELISTED
Sage Therapeutics
SAGE
| $440K | 0.02% |
397
+116
| +41% | +$9.11K |
|
739
Cirrus Logic
CRUS
$7.04B
| $438K | 0.02% |
8,216
+4,443
| +118% | +$260K |
|
740
CALL
US Bancorp Series B Preferred Stock
USB.PRH
$747M
| $438K | 0.02% |
4,067
-1,361
| -25% | -$32.3K |
|
|
LOGM
741
DELISTED
LogMein, Inc.
LOGM
| $438K | 0.02% |
+3,984
| New | +$447K |
|
|
BNY
742
Bank of New York Mellon
BNY
$109B
| $437K | 0.02% |
+8,261
| New | +$434K |
|
743
Citizens Financial Group
CFG
$30.6B
| $437K | 0.02% |
11,541
+6,938
| +151% | +$243K |
|
744
CALL
Lam Research
LRCX
$399B
| $437K | 0.02% |
2,810
-810
| -22% | -$13.1K |
|
|
SNC
745
DELISTED
State National Companies, Inc.
SNC
| $436K | 0.02% |
+20,818
| New | +$422K |
|
|
K
746
PUT
DELISTED
Kellanova
K
| $435K | 0.02% |
2,108
+1,256
| +147% | +$79.3K |
|
747
CALL
CVS Health
CVS
$138B
| $433K | 0.02% |
2,574
-786
| -23% | -$62.2K |
|
748
Dolby
DLB
$4.65B
| $433K | 0.02% |
+7,532
| New | +$395K |
|
749
CALL
RTX Corp
RTX
$262B
| $433K | 0.02% |
2,598
+621
| +31% | +$45.9K |
|
750
CALL
Capital One
COF
$124B
| $432K | 0.02% |
1,685
+835
| +98% | +$68.8K |
|
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.