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 | |
|---|---|---|---|---|---|---|
|
CTRA
851
DELISTED
Coterra Energy
CTRA
| $349K | 0.02% |
13,947
-63,530
| -82% | -$1.5M |
|
|
P
852
Everpure Inc
P
$25B
| $348K | 0.02% |
27,184
+9,401
| +53% | +$109K |
|
|
ARRY
853
DELISTED
Array Biopharma Inc
ARRY
| $348K | 0.02% |
41,613
+40,378
| +3,269% | +$330K |
|
854
Crown Castle
CCI
$32.5B
| $347K | 0.02% |
3,470
-17,831
| -84% | -$1.75M |
|
855
PUT
FedEx
FDX
$74.7B
| $347K | 0.02% |
4,591
+1,711
| +59% | +$338K |
|
|
WBA
856
PUT
DELISTED
Walgreens Boots Alliance
WBA
| $347K | 0.02% |
2,398
-773
| -24% | -$63.6K |
|
857
West Pharmaceutical
WST
$25.1B
| $347K | 0.02% |
3,676
+3,592
| +4,276% | +$330K |
|
|
ALDR
858
DELISTED
Alder Biopharmaceuticals
ALDR
| $347K | 0.02% |
30,369
+29,103
| +2,299% | +$538K |
|
|
FDC
859
CALL
DELISTED
First Data Corporation
FDC
| $346K | 0.02% |
1,621
+416
| +35% | +$6.96K |
|
860
CALL
Ulta Beauty
ULTA
$20.5B
| $345K | 0.02% |
569
-69
| -11% | -$20.1K |
|
|
SXCP
861
DELISTED
SunCoke Energy Partners, L.P.
SXCP
| $345K | 0.02% |
19,712
+8,326
| +73% | +$139K |
|
|
GIMO
862
CALL
DELISTED
Gigamon Inc.
GIMO
| $345K | 0.02% |
752
+661
| +726% | +$24.9K |
|
|
SAFM
863
DELISTED
Sanderson Farms Inc
SAFM
| $344K | 0.01% |
+2,981
| New | +$347K |
|
864
CALL
ArcelorMittal
MT
$49.9B
| $343K | 0.01% |
1,822
+1,732
| +1,924% | +$38.8K |
|
865
CALL
Newmont
NEM
$101B
| $343K | 0.01% |
1,102
-1,547
| -58% | -$52.1K |
|
|
KS
866
DELISTED
KapStone Paper and Pack Corp.
KS
| $343K | 0.01% |
+16,664
| New | +$359K |
|
867
Zillow
ZG
$6.76B
| $340K | 0.01% |
6,966
+486
| +8% | +$20.3K |
|
|
LL
868
DELISTED
LL Flooring Holdings, Inc.
LL
| $340K | 0.01% |
+13,584
| New | +$341K |
|
|
AUY
869
DELISTED
Yamana Gold, Inc.
AUY
| $340K | 0.01% |
139,974
+113,334
| +425% | +$306K |
|
870
Entravision Communication
EVC
$969M
| $339K | 0.01% |
51,419
+39,876
| +345% | +$241K |
|
871
Teleflex
TFX
$5.81B
| $339K | 0.01% |
1,633
-17
| -1% | -$3.41K |
|
|
WMGI
872
DELISTED
Wright Medical Group Inc
WMGI
| $339K | 0.01% |
12,342
-15,408
| -56% | -$436K |
|
|
APU
873
DELISTED
AmeriGas Partners, L.P.
APU
| $339K | 0.01% |
+7,515
| New | +$337K |
|
874
Azenta
AZTA
$1.3B
| $338K | 0.01% |
15,624
+1,162
| +8% | +$29.4K |
|
875
Cedar Fair
FUN
$1.76B
| $338K | 0.01% |
+4,699
| New | +$331K |
|
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.