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
|
+$83.1M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37.2M |
| 3 |
Amgen
AMGN
|
+$30.5M |
| 4 |
Micron Technology
MU
|
+$28.8M |
| 5 |
Qualcomm
QCOM
|
+$18.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$29.5M |
| 2 |
Goldman Sachs
GS
|
+$27.8M |
| 3 |
Gilead Sciences
GILD
|
+$27.6M |
| 4 |
Booking.com
BKNG
|
+$25.4M |
| 5 |
AT&T
T
|
+$19.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 13.55% |
| 2 | Communication Services | 11.57% |
| 3 | Consumer Discretionary | 9.69% |
| 4 | Healthcare | 7.28% |
| 5 | Financials | 4.17% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
801
CALL
Weibo
WB
$1.91B
| $383K | 0.02% |
870
+249
| +40% | +$16.2K |
|
|
PERY
802
DELISTED
Perry Ellis International Inc
PERY
| $383K | 0.02% |
19,718
+18,448
| +1,453% | +$362K |
|
803
PUT
3D Systems Corp
DDD
$418M
| $382K | 0.02% |
865
-560
| -39% | -$10.6K |
|
804
CALL
General Motors
GM
$72.6B
| $382K | 0.02% |
3,480
-309
| -8% | -$10.5K |
|
805
PUT
Home Depot
HD
$324B
| $381K | 0.02% |
2,632
-3,285
| -56% | -$504K |
|
806
PUT
Altria Group
MO
$120B
| $381K | 0.02% |
3,377
-356
| -10% | -$26K |
|
807
JB Hunt Transport Services
JBHT
$27.1B
| $380K | 0.02% |
4,164
-3,448
| -45% | -$305K |
|
808
Lincoln National
LNC
$7.84B
| $380K | 0.02% |
5,623
-13,541
| -71% | -$895K |
|
|
PBPB
809
DELISTED
Potbelly
PBPB
| $380K | 0.02% |
33,075
+11,203
| +51% | +$137K |
|
810
PUT
Lowe's Companies
LOW
$113B
| $379K | 0.02% |
3,641
-625
| -15% | -$51.1K |
|
811
CALL
Exelixis
EXEL
$14B
| $377K | 0.02% |
841
-697
| -45% | -$14.7K |
|
812
Tenaris
TS
$29.1B
| $377K | 0.02% |
+12,129
| New | +$382K |
|
|
CLVS
813
DELISTED
Clovis Oncology, Inc.
CLVS
| $377K | 0.02% |
4,030
-37,343
| -90% | -$2.29M |
|
814
PUT
Helmerich & Payne
HP
$3.5B
| $374K | 0.02% |
485
+110
| +29% | +$6.45K |
|
|
DYN
815
DELISTED
Dynegy, Inc.
DYN
| $374K | 0.02% |
+45,244
| New | +$343K |
|
816
Direxion Daily FTSE China Bull 3X ETF
YINN
$651M
| $373K | 0.02% |
855
+487
| +132% | +$205K |
|
817
PUT
McDonald's
MCD
$186B
| $372K | 0.02% |
3,051
+1,241
| +69% | +$179K |
|
|
818
CALL
Qualcomm
QCOM
$178B
| $372K | 0.02% |
1,766
-2,676
| -60% | -$149K |
|
819
Sprouts Farmers Market
SFM
$6.8B
| $372K | 0.02% |
16,453
-120,276
| -88% | -$2.79M |
|
820
CALL
United Rentals
URI
$71.5B
| $372K | 0.02% |
448
-146
| -25% | -$16.3K |
|
821
Vornado Realty Trust
VNO
$7.34B
| $372K | 0.02% |
+4,902
| New | +$380K |
|
|
SAVE
822
DELISTED
Spirit Airlines, Inc.
SAVE
| $372K | 0.02% |
+7,212
| New | +$395K |
|
823
PUT
Avis
CAR
$5.64B
| $371K | 0.02% |
1,474
+1,015
| +221% | +$26.1K |
|
824
Nelnet
NNI
$4.73B
| $371K | 0.02% |
7,904
-11,722
| -60% | -$511K |
|
825
Vanguard FTSE Emerging Markets ETF
VWO
$119B
| $371K | 0.02% |
9,104
-10,913
| -55% | -$442K |
|
Similar funds
Simplex Trading's Q2 2017 Portfolio in Review
As of Q2 2017, Simplex Trading held 7,527 positions worth $2.3B, down 0.39% from $2.31B the previous quarter. Its ten largest holdings account for 23% of the portfolio.
Simplex Trading withdrew a net $114M in Q2 2017, closing 1,474 positions and reducing 2,320 holdings. Its most notable exit was AT&T, an estimated $19.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 14% of assets, up from 9.7% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amgen worth $32.3M.
- Simplex Trading's largest Q2 2017 buy was Amgen: 187,633 shares worth $32.3M.
- Simplex Trading added most to Amazon in Q2 2017, an estimated $83.1M increase.
- Simplex Trading's biggest Q2 2017 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $29.5M.
- Simplex Trading fully exited AT&T in Q2 2017, selling an estimated $19.6M.
- Simplex Trading's ten largest holdings make up 23% of its $2.3B portfolio in Q2 2017.
- Simplex Trading opened 1,408 new positions and closed 1,474 in Q2 2017.
- Simplex Trading's portfolio value fell 0.39% quarter-over-quarter to $2.3B.
Based on Simplex Trading's 13F filing for Q2 2017, filed 12 Jul 2017.