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 | |
|---|---|---|---|---|---|---|
|
DDC
2876
DELISTED
Dominion Diamond Corporation
DDC
| $31K | ﹤0.01% |
2,477
-27,642
| -92% | -$351K |
|
2877
PUT
Affiliated Managers Group
AMG
$9.46B
| $30K | ﹤0.01% |
142
-136
| -49% | -$21.7K |
|
|
AMWD
2878
DELISTED
American Woodmark
AMWD
| $30K | ﹤0.01% |
318
-1,240
| -80% | -$114K |
|
2879
American Vanguard Corp
AVD
$73.5M
| $30K | ﹤0.01% |
1,790
-14,873
| -89% | -$256K |
|
2880
Becton Dickinson
BDX
$43.1B
| $30K | ﹤0.01% |
+160
| New | +$29.2K |
|
2881
PUT
Cytokinetics
CYTK
$11B
| $30K | ﹤0.01% |
125
+4
| +3% | +$56 |
|
2882
CALL
Editas Medicine
EDIT
$399M
| $30K | ﹤0.01% |
310
-119
| -28% | -$2.15K |
|
2883
Elevance Health
ELV
$81.9B
| $30K | ﹤0.01% |
162
-174
| -52% | -$31.3K |
|
2884
PUT
Element Solutions
ESI
$9.12B
| $30K | ﹤0.01% |
+762
| New | +$9.96K |
|
2885
PUT
Energy Transfer Partners
ET
$70.1B
| $30K | ﹤0.01% |
424
-181
| -30% | -$3.22K |
|
2886
CALL
Ford
F
$57.3B
| $30K | ﹤0.01% |
388
-719
| -65% | -$8.03K |
|
2887
HealthEquity
HQY
$7.91B
| $30K | ﹤0.01% |
+608
| New | +$28.4K |
|
2888
Kinross Gold
KGC
$28.5B
| $30K | ﹤0.01% |
+7,386
| New | +$29.4K |
|
|
KNDI
2889
PUT
Kandi Technologies Group
KNDI
$65.3M
| $30K | ﹤0.01% |
97
-27
| -22% | -$111 |
|
2890
CALL
LKQ Corp
LKQ
$6.58B
| $30K | ﹤0.01% |
421
+342
| +433% | +$10.6K |
|
|
MRSH
2891
CALL
Marsh
MRSH
$86.3B
| $30K | ﹤0.01% |
95
-70
| -42% | -$5.29K |
|
2892
Nokia
NOK
$50.8B
| $30K | ﹤0.01% |
4,892
-5,076
| -51% | -$30.4K |
|
|
NVO
2893
CALL
Novo Nordisk
NVO
$216B
| $30K | ﹤0.01% |
240
-300
| -56% | -$6.05K |
|
2894
PUT
Realty Income
O
$61.2B
| $30K | ﹤0.01% |
196
-29
| -13% | -$1.6K |
|
|
OBE
2895
Obsidian Energy
OBE
$707M
| $30K | ﹤0.01% |
+3,440
| New | +$30.6K |
|
2896
POSCO
PKX
$15.8B
| $30K | ﹤0.01% |
494
+106
| +27% | +$6.39K |
|
2897
uniQure
QURE
$2.68B
| $30K | ﹤0.01% |
4,918
+4,456
| +965% | +$24.1K |
|
|
SGMO
2898
PUT
DELISTED
SANGAMO THERAPEUTICS INC
SGMO
| $30K | ﹤0.01% |
285
-244
| -46% | -$1.56K |
|
2899
PUT
Tapestry
TPR
$28.8B
| $30K | ﹤0.01% |
694
+57
| +9% | +$2.5K |
|
2900
Uranium Energy
UEC
$4.71B
| $30K | ﹤0.01% |
19,042
+193
| +1% | +$269 |
|
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.