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 |
iShares Russell 2000 ETF
IWM
|
+$29.8M |
| 2 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$17.1M |
| 3 |
Walt Disney
DIS
|
+$14.8M |
| 4 |
Gilead Sciences
GILD
|
+$11.8M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$11.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$92.9M |
| 2 |
Apple
AAPL
|
+$22.5M |
| 3 |
Meta Platforms (Facebook)
META
|
+$20.5M |
| 4 |
IBM
IBM
|
+$12.7M |
| 5 |
Baidu
BIDU
|
+$10M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Healthcare | 6.46% |
| 2 | Communication Services | 4.66% |
| 3 | Consumer Discretionary | 4.6% |
| 4 | Technology | 4.57% |
| 5 | Financials | 4.49% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
CUDA
926
PUT
DELISTED
Barracuda Networks, Inc.
CUDA
| $199K | 0.01% |
+264
| New | +$7.42K |
|
927
PUT
United Therapeutics
UTHR
$26.4B
| $196K | 0.01% |
143
+117
| +450% | +$18.8K |
|
|
ALDR
928
PUT
DELISTED
Alder Biopharmaceuticals
ALDR
| $196K | 0.01% |
410
+355
| +645% | +$15.1K |
|
|
FDML
929
PUT
DELISTED
Federal-Mogul Holdings Corporation
FDML
| $196K | 0.01% |
217
+197
| +985% | +$1.84K |
|
930
AES
AES
$10.6B
| $195K | 0.01% |
+20,000
| New | +$241K |
|
931
PUT
Fluor
FLR
$7.44B
| $195K | 0.01% |
305
+144
| +89% | +$6.76K |
|
932
PUT
ServiceNow
NOW
$94.8B
| $195K | 0.01% |
1,280
+620
| +94% | +$9.26K |
|
933
PUT
Nu Skin
NUS
$247M
| $195K | 0.01% |
236
-28
| -11% | -$1.2K |
|
934
PUT
YPF
YPF
$20.4B
| $195K | 0.01% |
200
-343
| -63% | -$7.67K |
|
935
CALL
Equinix
EQIX
$102B
| $194K | 0.01% |
37
-9
| -20% | -$2.47K |
|
936
Asbury Automotive
ABG
$4.14B
| $193K | 0.01% |
+2,387
| New | +$202K |
|
937
PUT
Blackrock
BLK
$161B
| $193K | 0.01% |
232
+118
| +104% | +$38.1K |
|
938
PUT
Lowe's Companies
LOW
$113B
| $193K | 0.01% |
333
+188
| +130% | +$12.9K |
|
|
LL
939
PUT
DELISTED
LL Flooring Holdings, Inc.
LL
| $193K | 0.01% |
303
-334
| -52% | -$5.48K |
|
|
CMA
940
DELISTED
Comerica
CMA
| $192K | 0.01% |
4,677
+1,935
| +71% | +$88K |
|
|
TAL
941
PUT
DELISTED
TAL INTERNATIONAL GROUP, INC.
TAL
| $192K | 0.01% |
109
+34
| +45% | +$716 |
|
942
Fidelity National Information Services
FIS
$20.7B
| $191K | 0.01% |
2,850
-6,710
| -70% | -$447K |
|
|
FLOW
943
DELISTED
SPX FLOW, Inc.
FLOW
| $191K | 0.01% |
+5,549
| New | +$189K |
|
|
PIR
944
PUT
DELISTED
Pier 1 Imports, Inc.
PIR
| $191K | 0.01% |
23
+19
| +475% | +$4.15K |
|
|
PNRA
945
CALL
DELISTED
Panera Bread Co
PNRA
| $191K | 0.01% |
143
+122
| +581% | +$22.7K |
|
|
RPTP
946
PUT
DELISTED
RAPTOR PHARMACEUTICAL CORP COM STK (DE)
RPTP
| $190K | 0.01% |
559
-63
| -10% | -$772 |
|
947
Gildan
GIL
$9.18B
| $189K | 0.01% |
6,292
+5,143
| +448% | +$164K |
|
948
Integer Holdings
ITGR
$3.31B
| $189K | 0.01% |
+3,683
| New | +$184K |
|
949
Opko Health
OPK
$883M
| $189K | 0.01% |
22,502
+4,677
| +26% | +$61.9K |
|
950
W.P. Carey
WPC
$16.7B
| $189K | 0.01% |
3,349
+3,251
| +3,317% | +$189K |
|
Similar funds
Simplex Trading's Q3 2015 Portfolio in Review
As of Q3 2015, Simplex Trading held 7,014 positions worth $1.36B, up 14% from $1.19B the previous quarter. Its ten largest holdings account for 15% of the portfolio.
Simplex Trading's Q3 2015 filing shows 1,810 new, 2,203 increased, 1,391 reduced and 1,420 closed positions. Its largest new stake was iShares Russell 2000 ETF: 251,486 shares worth $27.5M. The largest sale was Alphabet (Google) Class C, an estimated $92.9M.
By sector, the portfolio is most concentrated in Healthcare at 6.5% of assets, down from 7.8% a quarter earlier, followed by Communication Services and Consumer Discretionary.
- Simplex Trading's largest Q3 2015 buy was iShares Russell 2000 ETF: 251,486 shares worth $27.5M.
- Simplex Trading added most to iShares MSCI Emerging Markets ETF in Q3 2015, an estimated $11.2M increase.
- Simplex Trading's biggest Q3 2015 reduction was Alphabet (Google) Class C, cutting an estimated $92.9M.
- Simplex Trading fully exited IBM in Q3 2015, selling an estimated $12.7M.
- Simplex Trading's ten largest holdings make up 15% of its $1.36B portfolio in Q3 2015.
- Simplex Trading opened 1,810 new positions and closed 1,420 in Q3 2015.
- Simplex Trading's portfolio value rose 14% quarter-over-quarter to $1.36B.
Based on Simplex Trading's 13F filing for Q3 2015, filed 8 Oct 2015.