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 | |
|---|---|---|---|---|---|---|
|
NRF
1026
DELISTED
NorthStar Realty Finance Corp.
NRF
| $169K | 0.01% |
+6,857
| New | +$204K |
|
|
PRE
1027
DELISTED
PARTNERRE LTD
PRE
| $169K | 0.01% |
+1,217
| New | +$166K |
|
1028
FedEx
FDX
$74.7B
| $168K | 0.01% |
1,168
-15,683
| -93% | -$2.5M |
|
1029
PUT
Mattel
MAT
$4.14B
| $168K | 0.01% |
214
+68
| +47% | +$1.59K |
|
1030
PUT
Phillips 66
PSX
$83B
| $168K | 0.01% |
396
-59
| -13% | -$4.69K |
|
1031
CALL
United Airlines
UAL
$37.4B
| $168K | 0.01% |
698
-168
| -19% | -$9.48K |
|
1032
Xerox
XRX
$341M
| $168K | 0.01% |
6,584
+6,554
| +21,847% | +$182K |
|
|
P
1033
PUT
DELISTED
Pandora Media Inc
P
| $168K | 0.01% |
1,300
+1,148
| +755% | +$20.1K |
|
|
SPNC
1034
DELISTED
Spectranetics Corp
SPNC
| $168K | 0.01% |
+14,268
| New | +$256K |
|
|
RAX
1035
PUT
DELISTED
Rackspace Hosting Inc
RAX
| $168K | 0.01% |
247
+188
| +319% | +$6.06K |
|
1036
CALL
Adobe
ADBE
$84.3B
| $167K | 0.01% |
346
+306
| +765% | +$24.8K |
|
1037
Duke Energy
DUK
$101B
| $167K | 0.01% |
2,328
-19,356
| -89% | -$1.4M |
|
1038
NextEra Energy
NEE
$187B
| $167K | 0.01% |
6,880
-22,652
| -77% | -$576K |
|
1039
PUT
Simon Property Group
SPG
$73B
| $167K | 0.01% |
374
+64
| +21% | +$11.7K |
|
1040
PUT
Tenet Healthcare
THC
$17.1B
| $167K | 0.01% |
153
-596
| -80% | -$30.8K |
|
1041
Unisys
UIS
$238M
| $167K | 0.01% |
14,064
+12,678
| +915% | +$195K |
|
1042
Vanguard Total World Stock ETF
VT
$76.3B
| $167K | 0.01% |
3,022
-989
| -25% | -$58.7K |
|
1043
CALL
Illumina
ILMN
$29.8B
| $166K | 0.01% |
305
+22
| +8% | +$4.45K |
|
1044
CALL
Alaunos Therapeutics
TCRT
$4.69M
| $166K | 0.01% |
6
+1
| +20% | +$1.65K |
|
1045
CALL
Ulta Beauty
ULTA
$20.5B
| $166K | 0.01% |
88
+20
| +29% | +$3.29K |
|
|
ONCE
1046
CALL
DELISTED
Spark Therapeutics, Inc. Common Stock
ONCE
| $166K | 0.01% |
502
+467
| +1,334% | +$24.4K |
|
1047
Alerian MLP ETF
AMLP
$12.9B
| $165K | 0.01% |
2,653
+2,536
| +2,168% | +$184K |
|
|
RENT
1048
DELISTED
RENTRAK CORP
RENT
| $165K | 0.01% |
+3,068
| New | +$172K |
|
|
BEE
1049
DELISTED
STRATEGIC HOTELS & RESORTS, INC
BEE
| $165K | 0.01% |
11,987
+9,603
| +403% | +$130K |
|
1050
PUT
Baytex Energy
BTE
$3.13B
| $164K | 0.01% |
390
+252
| +183% | +$1.92K |
|
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.