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 | |
|---|---|---|---|---|---|---|
3801
CALL
Chegg
CHGG
$122M
| $12K | ﹤0.01% |
85
+46
| +118% | +$500 |
|
3802
CALL
Clean Harbors
CLH
$17B
| $12K | ﹤0.01% |
82
+48
| +141% | +$2.76K |
|
3803
CALL
Cimpress
CMPR
$2.4B
| $12K | ﹤0.01% |
25
+1
| +4% | +$88 |
|
3804
CALL
Copart
CPRT
$28.9B
| $12K | ﹤0.01% |
508
-884
| -64% | -$6.77K |
|
3805
CALL
DigitalBridge
DBRG
$2.93B
| $12K | ﹤0.01% |
39
-7
| -15% | -$380 |
|
3806
PUT
Delek Logistics
DKL
$3.12B
| $12K | ﹤0.01% |
352
+159
| +82% | +$5K |
|
3807
PUT
Enbridge
ENB
$122B
| $12K | ﹤0.01% |
183
-306
| -63% | -$12.3K |
|
3808
CALL
Essex Property Trust
ESS
$19B
| $12K | ﹤0.01% |
+39
| New | +$9.8K |
|
3809
CALL
Diamondback Energy
FANG
$56B
| $12K | ﹤0.01% |
334
+231
| +224% | +$22.4K |
|
|
FARO
3810
DELISTED
Faro Technologies
FARO
| $12K | ﹤0.01% |
+341
| New | +$12.1K |
|
3811
CALL
FirstEnergy
FE
$29B
| $12K | ﹤0.01% |
955
+91
| +11% | +$2.7K |
|
3812
CALL
Green Plains
GPRE
$1.15B
| $12K | ﹤0.01% |
351
-798
| -69% | -$18.2K |
|
|
HOUS
3813
PUT
DELISTED
Anywhere Real Estate
HOUS
| $12K | ﹤0.01% |
+142
| New | +$4.3K |
|
3814
PUT
Innodata
INOD
$1.78B
| $12K | ﹤0.01% |
40
| – | – |
|
3815
CALL
KBR
KBR
$4.58B
| $12K | ﹤0.01% |
504
+197
| +64% | +$2.92K |
|
3816
PUT
Kennametal
KMT
$2.61B
| $12K | ﹤0.01% |
57
-227
| -80% | -$8.88K |
|
3817
CALL
LCI Industries
LCII
$2.58B
| $12K | ﹤0.01% |
37
+17
| +85% | +$1.63K |
|
3818
PUT
Lennox International
LII
$15.3B
| $12K | ﹤0.01% |
+64
| New | +$11.2K |
|
|
LNW
3819
PUT
DELISTED
Light & Wonder
LNW
| $12K | ﹤0.01% |
146
-451
| -76% | -$10.7K |
|
3820
CALL
ManpowerGroup
MAN
$2.61B
| $12K | ﹤0.01% |
13
-4
| -24% | -$413 |
|
3821
MDU Resources
MDU
$4.29B
| $12K | ﹤0.01% |
1,304
+1,220
| +1,452% | +$12.5K |
|
|
NOAH
3822
Noah Holdings
NOAH
$597M
| $12K | ﹤0.01% |
+441
| New | +$11.7K |
|
3823
NWPX Infrastructure Inc
NWPX
$1.18B
| $12K | ﹤0.01% |
+740
| New | +$10.9K |
|
3824
PUT
Okta
OKTA
$23.5B
| $12K | ﹤0.01% |
+91
| New | +$2.25K |
|
3825
CALL
OSI Systems
OSIS
$3.55B
| $12K | ﹤0.01% |
177
-74
| -29% | -$5.6K |
|
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.