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 | |
|---|---|---|---|---|---|---|
3701
PUT
Nektar Therapeutics
NKTR
$2.39B
| $9K | ﹤0.01% |
5
| – | – |
|
3702
Northern Oil and Gas
NOG
$2.16B
| $9K | ﹤0.01% |
337
-146
| -30% | -$5.33K |
|
3703
CALL
Novartis
NVS
$304B
| $9K | ﹤0.01% |
397
+108
| +37% | +$7.87K |
|
3704
CALL
Progressive
PGR
$128B
| $9K | ﹤0.01% |
162
+148
| +1,057% | +$4.82K |
|
3705
PUT
Parker-Hannifin
PH
$125B
| $9K | ﹤0.01% |
48
+12
| +33% | +$1.43K |
|
3706
Plug Power
PLUG
$2.73B
| $9K | ﹤0.01% |
5,552
-4,200
| -43% | -$6.98K |
|
3707
PUT
Protalix BioTherapeutics
PLX
$188M
| $9K | ﹤0.01% |
18
-10
| -36% | -$62 |
|
3708
PUT
CPI Card Group
PMTS
$243M
| $9K | ﹤0.01% |
6
| – | – |
|
3709
PUT
Post Holdings
POST
$4.27B
| $9K | ﹤0.01% |
34
-24
| -41% | -$1.32K |
|
3710
PUT
Sinclair Inc
SBGI
$1.02B
| $9K | ﹤0.01% |
166
+124
| +295% | +$3.59K |
|
3711
Stepan Co
SCL
$1.32B
| $9K | ﹤0.01% |
+131
| New | +$8.8K |
|
3712
CALL
SolarEdge
SEDG
$2.44B
| $9K | ﹤0.01% |
93
-101
| -52% | -$1.78K |
|
3713
CALL
Sprouts Farmers Market
SFM
$7.31B
| $9K | ﹤0.01% |
197
-36
| -15% | -$798 |
|
3714
Silgan Holdings
SLGN
$5.07B
| $9K | ﹤0.01% |
358
-1,956
| -85% | -$48.8K |
|
3715
CALL
Super Micro Computer
SMCI
$18.4B
| $9K | ﹤0.01% |
630
+200
| +47% | +$445 |
|
3716
CALL
Smith & Nephew
SNN
$13.7B
| $9K | ﹤0.01% |
381
+295
| +343% | +$9.89K |
|
|
NSLR
3717
Neostellar Capital Corp
NSLR
$269M
| $9K | ﹤0.01% |
2,274
+43
| +2% | +$187 |
|
3718
PUT
Tidewater
TDW
$3.71B
| $9K | ﹤0.01% |
1
| – | – |
|
3719
CALL
Atlassian
TEAM
$25.4B
| $9K | ﹤0.01% |
62
-13
| -17% | -$380 |
|
3720
TriNet
TNET
$3.14B
| $9K | ﹤0.01% |
+429
| New | +$9.13K |
|
3721
PUT
Toll Brothers
TOL
$14.5B
| $9K | ﹤0.01% |
78
-51
| -40% | -$1.47K |
|
3722
CALL
Tetra Tech
TTEK
$8.7B
| $9K | ﹤0.01% |
+295
| New | +$2K |
|
3723
PUT
Travere Therapeutics
TVTX
$5.2B
| $9K | ﹤0.01% |
95
+22
| +30% | +$419 |
|
3724
VOC Energy
VOC
$58M
| $9K | ﹤0.01% |
+3,020
| New | +$9.35K |
|
|
VTLE
3725
DELISTED
Vital Energy
VTLE
| $9K | ﹤0.01% |
+36
| New | +$8.21K |
|
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.