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
|
+$45.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$30.1M |
| 3 |
TWX
Time Warner Inc
TWX
|
+$25.8M |
| 4 |
Booking.com
BKNG
|
+$22.5M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$17.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$43.6M |
| 2 |
Amgen
AMGN
|
+$33.2M |
| 3 |
Baidu
BIDU
|
+$19.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$17.3M |
| 5 |
Micron Technology
MU
|
+$17.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 14.31% |
| 2 | Technology | 13.17% |
| 3 | Communication Services | 11.81% |
| 4 | Healthcare | 4.06% |
| 5 | Financials | 3.84% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
876
PUT
Bank of America
BAC
$427B
| $342K | 0.01% |
2,339
-5,869
| -72% | -$142K |
|
877
Brookdale Senior Living
BKD
$3.5B
| $342K | 0.01% |
32,341
+32,141
| +16,071% | +$407K |
|
878
KB Home
KBH
$3.38B
| $342K | 0.01% |
+14,206
| New | +$320K |
|
879
CALL
Protolabs
PRLB
$1.86B
| $342K | 0.01% |
260
-82
| -24% | -$5.93K |
|
880
Verisk Analytics
VRSK
$25.2B
| $342K | 0.01% |
4,122
+3,154
| +326% | +$261K |
|
881
Hecla Mining
HL
$10.1B
| $341K | 0.01% |
67,973
+9,317
| +16% | +$47.8K |
|
882
PUT
MGM Resorts International
MGM
$11.5B
| $341K | 0.01% |
2,128
+330
| +18% | +$10.6K |
|
|
FITB
883
CALL
Fifth Third Bancorp
FITB
$51.2B
| $340K | 0.01% |
991
+446
| +82% | +$11.8K |
|
884
PUT
Herbalife
HLF
$1.23B
| $339K | 0.01% |
3,380
-1,798
| -35% | -$61.5K |
|
|
VR
885
DELISTED
Validus Hold Ltd
VR
| $339K | 0.01% |
+6,898
| New | +$350K |
|
886
Regency Centers
REG
$15B
| $337K | 0.01% |
5,447
+3,077
| +130% | +$198K |
|
887
CALL
ASML
ASML
$689B
| $336K | 0.01% |
148
+25
| +20% | +$3.83K |
|
888
PUT
Medtronic
MDT
$105B
| $336K | 0.01% |
1,404
+41
| +3% | +$3.4K |
|
889
CALL
STMicroelectronics
STM
$48.2B
| $336K | 0.01% |
2,016
+323
| +19% | +$5.58K |
|
890
PUT
Charter Communications
CHTR
$15.4B
| $335K | 0.01% |
523
-22
| -4% | -$8.19K |
|
|
SNP
891
DELISTED
CHINA PETROLEUM & CHEMICAL CORPORATION ADS (REP 100 ORDINARY H SHARES)
SNP
| $335K | 0.01% |
4,427
+2,275
| +106% | +$174K |
|
892
CALL
Ambarella
AMBA
$2.96B
| $334K | 0.01% |
861
+518
| +151% | +$25.6K |
|
893
CALL
Delta Air Lines
DAL
$53.5B
| $334K | 0.01% |
1,883
-1,609
| -46% | -$80.2K |
|
894
La-Z-Boy
LZB
$1.55B
| $334K | 0.01% |
+12,420
| New | +$362K |
|
895
Owens Corning
OC
$11B
| $334K | 0.01% |
+4,327
| New | +$303K |
|
|
AHGP
896
DELISTED
Alliance Holdings GP
AHGP
| $334K | 0.01% |
12,037
-3,434
| -22% | -$90.9K |
|
897
CNX Resources
CNX
$4.95B
| $333K | 0.01% |
23,653
+16,663
| +238% | +$214K |
|
|
UWC
898
PUT
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $333K | 0.01% |
2,151
+512
| +31% | +$79.3K |
|
899
Enovis
ENOV
$1.47B
| $332K | 0.01% |
4,636
+862
| +23% | +$60K |
|
900
PUT
Kroger
KR
$34B
| $331K | 0.01% |
1,472
-562
| -28% | -$12.7K |
|
Similar funds
Simplex Trading's Q3 2017 Portfolio in Review
As of Q3 2017, Simplex Trading held 7,357 positions worth $2.45B, up 6.4% from $2.3B the previous quarter. Its ten largest holdings account for 24% of the portfolio.
Simplex Trading's Q3 2017 filing shows 1,313 new, 2,078 increased, 2,339 reduced and 1,500 closed positions. Its largest new stake was iShares Russell 2000 ETF: 214,170 shares worth $31.7M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $43.6M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 14% of assets, up from 9.7% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q3 2017 buy was iShares Russell 2000 ETF: 214,170 shares worth $31.7M.
- Simplex Trading added most to Amazon in Q3 2017, an estimated $45.9M increase.
- Simplex Trading's biggest Q3 2017 reduction was Baidu, cutting an estimated $19.3M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q3 2017, selling an estimated $43.6M.
- Simplex Trading's ten largest holdings make up 24% of its $2.45B portfolio in Q3 2017.
- Simplex Trading opened 1,313 new positions and closed 1,500 in Q3 2017.
- Simplex Trading's portfolio value rose 6.4% quarter-over-quarter to $2.45B.
Based on Simplex Trading's 13F filing for Q3 2017, filed 25 Oct 2017.