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 |
Gilead Sciences
GILD
|
+$17.3M |
| 2 |
Apple
AAPL
|
+$15.2M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$14.9M |
| 4 |
Booking.com
BKNG
|
+$14.7M |
| 5 |
Wells Fargo
WFC
|
+$12.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
SPDR Gold Trust
GLD
|
+$38.3M |
| 2 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$30.7M |
| 3 |
LNKD
LinkedIn Corporation
LNKD
|
+$15.2M |
| 4 |
CELG
Celgene Corp
CELG
|
+$12.6M |
| 5 |
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
|
+$10.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 8.39% |
| 2 | Healthcare | 8.28% |
| 3 | Consumer Discretionary | 6.84% |
| 4 | Technology | 6.06% |
| 5 | Financials | 4.39% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
SSRI
2901
PUT
DELISTED
Silver Standard Resources
SSRI
| $22K | ﹤0.01% |
296
-44
| -13% | -$594 |
|
|
LXK
2902
PUT
DELISTED
Lexmark Intl Inc
LXK
| $22K | ﹤0.01% |
1,077
-262
| -20% | -$9.53K |
|
2903
PUT
American Electric Power
AEP
$73.7B
| $21K | ﹤0.01% |
461
+108
| +31% | +$7.26K |
|
2904
CALL
Autohome
ATHM
$2.43B
| $21K | ﹤0.01% |
+82
| New | +$1.91K |
|
2905
Donaldson
DCI
$10.8B
| $21K | ﹤0.01% |
+567
| New | +$20.7K |
|
|
FITB
2906
PUT
Fifth Third Bancorp
FITB
$52B
| $21K | ﹤0.01% |
541
+334
| +161% | +$6.45K |
|
2907
Frontline
FRO
$8.75B
| $21K | ﹤0.01% |
+2,958
| New | +$22.9K |
|
2908
The GEO Group
GEO
$4.13B
| $21K | ﹤0.01% |
+1,364
| New | +$25.7K |
|
|
2909
PUT
The GEO Group
GEO
$4.13B
| $21K | ﹤0.01% |
339
+237
| +232% | +$4.47K |
|
2910
CALL
Gray Television
GTN
$407M
| $21K | ﹤0.01% |
340
+303
| +819% | +$3.3K |
|
2911
Hooker Furnishings Corp
HOFT
$148M
| $21K | ﹤0.01% |
+864
| New | +$20.6K |
|
2912
CALL
Interactive Brokers
IBKR
$40.9B
| $21K | ﹤0.01% |
1,192
+64
| +6% | +$567 |
|
2913
PUT
Icon
ICLR
$12.8B
| $21K | ﹤0.01% |
82
+76
| +1,267% | +$5.71K |
|
2914
CALL
Mattel
MAT
$4.17B
| $21K | ﹤0.01% |
618
+468
| +312% | +$15.3K |
|
2915
PUT
MarketAxess Holdings
MKTX
$4.15B
| $21K | ﹤0.01% |
49
-27
| -36% | -$4.38K |
|
2916
PUT
National Healthcare
NHC
$3.53B
| $21K | ﹤0.01% |
277
+164
| +145% | +$10.6K |
|
2917
OneMain Financial
OMF
$6.9B
| $21K | ﹤0.01% |
680
-20,991
| -97% | -$604K |
|
2918
CALL
OSI Systems
OSIS
$3.57B
| $21K | ﹤0.01% |
+50
| New | +$3.15K |
|
2919
PUT
ResMed
RMD
$28.3B
| $21K | ﹤0.01% |
91
+48
| +112% | +$3.19K |
|
|
SAFE
2920
CALL
Safehold
SAFE
$1.19B
| $21K | ﹤0.01% |
42
-29
| -41% | -$1.48K |
|
|
SAND
2921
CALL
DELISTED
Sandstorm Gold
SAND
| $21K | ﹤0.01% |
554
+435
| +366% | +$2.44K |
|
2922
PUT
Shopify
SHOP
$148B
| $21K | ﹤0.01% |
4,110
+3,010
| +274% | +$11.5K |
|
2923
CALL
S&P Global
SPGI
$126B
| $21K | ﹤0.01% |
108
+49
| +83% | +$5.88K |
|
2924
PUT
Truist Financial
TFC
$63.2B
| $21K | ﹤0.01% |
394
+15
| +4% | +$559 |
|
|
TGNA
2925
DELISTED
TEGNA Inc
TGNA
| $21K | ﹤0.01% |
+1,513
| New | +$21.3K |
|
Similar funds
Simplex Trading's Q3 2016 Portfolio in Review
As of Q3 2016, Simplex Trading held 7,235 positions worth $1.48B, down 1.4% from $1.5B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading withdrew a net $87.1M in Q3 2016, closing 1,479 positions and reducing 1,939 holdings. Its most notable exit was SPDR Gold Trust, an estimated $38.3M position sold in full.
By sector, the portfolio is most concentrated in Communication Services at 8.4% of assets, up from 6.6% a quarter earlier, followed by Healthcare and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Booking.com worth $15.6M.
- Simplex Trading's largest Q3 2016 buy was Booking.com: 264,225 shares worth $15.6M.
- Simplex Trading added most to Gilead Sciences in Q3 2016, an estimated $17.3M increase.
- Simplex Trading's biggest Q3 2016 reduction was LinkedIn Corporation, cutting an estimated $15.2M.
- Simplex Trading fully exited SPDR Gold Trust in Q3 2016, selling an estimated $38.3M.
- Simplex Trading's ten largest holdings make up 18% of its $1.48B portfolio in Q3 2016.
- Simplex Trading opened 1,460 new positions and closed 1,479 in Q3 2016.
- Simplex Trading's portfolio value fell 1.4% quarter-over-quarter to $1.48B.
Based on Simplex Trading's 13F filing for Q3 2016, filed 7 Oct 2016.