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 | |
|---|---|---|---|---|---|---|
701
PUT
PepsiCo
PEP
$185B
| $472K | 0.02% |
2,306
-534
| -19% | -$61.7K |
|
|
SRCL
702
DELISTED
Stericycle Inc
SRCL
| $472K | 0.02% |
6,604
+3,838
| +139% | +$282K |
|
|
LL
703
CALL
DELISTED
LL Flooring Holdings, Inc.
LL
| $472K | 0.02% |
585
+20
| +4% | +$665 |
|
|
OPLN
704
Openlane
OPLN
$4.2B
| $471K | 0.02% |
26,079
+19,889
| +321% | +$328K |
|
705
CALL
Target
TGT
$62.6B
| $471K | 0.02% |
1,449
-743
| -34% | -$41.6K |
|
706
PUT
Intuitive Surgical
ISRG
$122B
| $470K | 0.02% |
6,057
+720
| +13% | +$78.4K |
|
707
CALL
EOG Resources
EOG
$76.7B
| $468K | 0.02% |
1,498
-306
| -17% | -$27.6K |
|
708
Graco
GGG
$12.3B
| $468K | 0.02% |
+11,361
| New | +$433K |
|
|
SKX
709
DELISTED
Skechers
SKX
| $467K | 0.02% |
18,648
-3,273
| -15% | -$89.4K |
|
|
TFCF
710
PUT
DELISTED
Twenty-First Century Fox, Inc. Class B
TFCF
| $466K | 0.02% |
2,019
+1,109
| +122% | +$30.1K |
|
|
OA
711
DELISTED
Orbital ATK, Inc.
OA
| $466K | 0.02% |
+3,500
| New | +$384K |
|
712
Host Hotels & Resorts
HST
$16.8B
| $465K | 0.02% |
+25,193
| New | +$458K |
|
713
CALL
SLB Ltd
SLB
$71.3B
| $463K | 0.02% |
3,296
+799
| +32% | +$52.8K |
|
714
PUT
AutoZone
AZO
$48.5B
| $462K | 0.02% |
377
+202
| +115% | +$108K |
|
715
Cenovus Energy
CVE
$54.1B
| $461K | 0.02% |
46,032
-23,269
| -34% | -$190K |
|
716
Energy Recovery
ERII
$440M
| $461K | 0.02% |
58,410
+49,978
| +593% | +$357K |
|
717
ProShares UltraShort QQQ
QID
$252M
| $460K | 0.02% |
+372
| New | +$477K |
|
|
GAP
718
CALL
The Gap Inc
GAP
$7.07B
| $455K | 0.02% |
1,241
+444
| +56% | +$10.9K |
|
719
PUT
Shopify
SHOP
$154B
| $454K | 0.02% |
21,240
+7,290
| +52% | +$74.5K |
|
|
CLVS
720
CALL
DELISTED
Clovis Oncology, Inc.
CLVS
| $454K | 0.02% |
246
-427
| -63% | -$33.9K |
|
|
DYN
721
DELISTED
Dynegy, Inc.
DYN
| $452K | 0.02% |
46,270
+1,026
| +2% | +$9.16K |
|
|
WRD
722
DELISTED
WildHorse Resource Development
WRD
| $451K | 0.02% |
33,912
+22,696
| +202% | +$272K |
|
723
CALL
Domino's
DPZ
$10.6B
| $449K | 0.02% |
290
+205
| +241% | +$39.9K |
|
|
WW
724
CALL
DELISTED
WW International
WW
| $449K | 0.02% |
714
-107
| -13% | -$4.44K |
|
725
Direxion Daily S&P Oil & Gas Exp. & Prod. Bull 2X ETF
GUSH
$254M
| $448K | 0.02% |
185
+159
| +612% | +$307K |
|
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.