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 | |
|---|---|---|---|---|---|---|
3676
PUT
D.R. Horton
DHI
$42.3B
| $11K | ﹤0.01% |
756
+19
| +3% | +$692 |
|
3677
CALL
DaVita
DVA
$15.4B
| $11K | ﹤0.01% |
108
-214
| -66% | -$12.9K |
|
3678
PUT
Ecolab
ECL
$79.6B
| $11K | ﹤0.01% |
54
+48
| +800% | +$6.31K |
|
3679
PUT
Ericsson
ERIC
$32.7B
| $11K | ﹤0.01% |
+225
| New | +$1.39K |
|
3680
Gerdau
GGB
$9.72B
| $11K | ﹤0.01% |
+4,191
| New | +$11.8K |
|
3681
CALL
Globant
GLOB
$1.52B
| $11K | ﹤0.01% |
80
-282
| -78% | -$11.6K |
|
3682
CALL
Hilton Worldwide
HLT
$73.4B
| $11K | ﹤0.01% |
17
-25
| -60% | -$1.59K |
|
3683
PUT
Herc Holdings
HRI
$4.95B
| $11K | ﹤0.01% |
30
+8
| +36% | +$347 |
|
|
ICAD
3684
PUT
DELISTED
iCAD Inc
ICAD
| $11K | ﹤0.01% |
+20
| New | +$77 |
|
3685
CALL
IMAX
IMAX
$2.59B
| $11K | ﹤0.01% |
63
-82
| -57% | -$1.69K |
|
3686
CALL
Jacobs Solutions
J
$16.6B
| $11K | ﹤0.01% |
+74
| New | +$3.31K |
|
3687
PUT
Johnson Controls International
JCI
$85.6B
| $11K | ﹤0.01% |
839
+225
| +37% | +$9.1K |
|
3688
PUT
Lincoln National
LNC
$8.19B
| $11K | ﹤0.01% |
333
-32
| -9% | -$2.26K |
|
3689
PUT
ArcelorMittal
MT
$50.7B
| $11K | ﹤0.01% |
343
-1,655
| -83% | -$42.8K |
|
3690
CALL
Murphy Oil
MUR
$5.25B
| $11K | ﹤0.01% |
145
-81
| -36% | -$2.03K |
|
3691
Newmont
NEM
$96.4B
| $11K | ﹤0.01% |
305
-66,549
| -100% | -$2.42M |
|
3692
CALL
Global X MSCI Norway ETF
NORW
$85M
| $11K | ﹤0.01% |
134
-107
| -44% | -$2.52K |
|
3693
Ocular Therapeutix
OCUL
$1.85B
| $11K | ﹤0.01% |
+1,927
| New | +$12.4K |
|
3694
CALL
Principal Financial Group
PFG
$24.6B
| $11K | ﹤0.01% |
84
+6
| +8% | +$386 |
|
3695
PUT
RadNet
RDNT
$4.97B
| $11K | ﹤0.01% |
+201
| New | +$1.84K |
|
3696
RPC Inc
RES
$1.14B
| $11K | ﹤0.01% |
+459
| New | +$9.54K |
|
3697
PUT
Ross Stores
ROST
$80.5B
| $11K | ﹤0.01% |
204
-365
| -64% | -$21K |
|
|
RYZ
3698
Ryerson Holding Corp
RYZ
$1.61B
| $11K | ﹤0.01% |
1,046
+878
| +523% | +$7.74K |
|
3699
PUT
Banco Santander
SAN
$200B
| $11K | ﹤0.01% |
231
-35
| -13% | -$223 |
|
|
SEE
3700
CALL
DELISTED
Sealed Air
SEE
| $11K | ﹤0.01% |
434
-895
| -67% | -$39.6K |
|
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.