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 | |
|---|---|---|---|---|---|---|
|
HIBB
3401
CALL
DELISTED
Hibbett, Inc. Common Stock
HIBB
| $16K | ﹤0.01% |
+93
| New | +$1.38K |
|
3402
CALL
Acco Brands
ACCO
$381M
| $15K | ﹤0.01% |
353
-122
| -26% | -$1.39K |
|
3403
CALL
AGCO
AGCO
$8.71B
| $15K | ﹤0.01% |
70
+61
| +678% | +$4.28K |
|
3404
AAR Corp
AIR
$5.46B
| $15K | ﹤0.01% |
+409
| New | +$14.8K |
|
3405
Airgain
AIRG
$72.8M
| $15K | ﹤0.01% |
+1,727
| New | +$19.4K |
|
3406
PUT
Amphenol
APH
$184B
| $15K | ﹤0.01% |
152
+16
| +12% | +$314 |
|
3407
PUT
Accuray
ARAY
$26.8M
| $15K | ﹤0.01% |
531
+389
| +274% | +$1.67K |
|
3408
CALL
AngloGold Ashanti
AU
$40.7B
| $15K | ﹤0.01% |
540
-628
| -54% | -$6.07K |
|
3409
CALL
American Vanguard Corp
AVD
$75.2M
| $15K | ﹤0.01% |
+50
| New | +$990 |
|
3410
CALL
Baker Hughes
BKR
$60.1B
| $15K | ﹤0.01% |
+248
| New | +$8.8K |
|
3411
PUT
Conagra Brands
CAG
$7.29B
| $15K | ﹤0.01% |
96
-46
| -32% | -$1.56K |
|
3412
CALL
Chubb
CB
$139B
| $15K | ﹤0.01% |
111
-102
| -48% | -$14.8K |
|
3413
CALL
Coeur Mining
CDE
$15.8B
| $15K | ﹤0.01% |
410
+71
| +21% | +$603 |
|
3414
PUT
Costamare
CMRE
$1.89B
| $15K | ﹤0.01% |
120
+78
| +186% | +$505 |
|
3415
CALL
Enterprise Products Partners
EPD
$82.5B
| $15K | ﹤0.01% |
591
+32
| +6% | +$846 |
|
3416
PUT
Gold Fields
GFI
$29.4B
| $15K | ﹤0.01% |
1,096
+135
| +14% | +$553 |
|
3417
PUT
GameStop
GME
$9.66B
| $15K | ﹤0.01% |
2,032
-652
| -24% | -$3.38K |
|
|
HDSN
3418
PUT
Hudson Technologies
HDSN
$263M
| $15K | ﹤0.01% |
+79
| New | +$684 |
|
3419
Harmony Gold Mining
HMY
$9.92B
| $15K | ﹤0.01% |
8,268
+1,330
| +19% | +$2.44K |
|
3420
CALL
IDT Corp
IDT
$1.63B
| $15K | ﹤0.01% |
357
+92
| +35% | +$1.13K |
|
3421
CALL
ITT
ITT
$17.7B
| $15K | ﹤0.01% |
64
+3
| +5% | +$124 |
|
|
JNPR
3422
PUT
DELISTED
Juniper Networks
JNPR
| $15K | ﹤0.01% |
263
-48
| -15% | -$1.34K |
|
3423
PUT
Kodak
KODK
$788M
| $15K | ﹤0.01% |
138
+90
| +188% | +$748 |
|
3424
Kilroy Realty
KRC
$4.58B
| $15K | ﹤0.01% |
+216
| New | +$15.2K |
|
3425
Kearny Financial
KRNY
$595M
| $15K | ﹤0.01% |
1,039
+615
| +145% | +$8.96K |
|
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.