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 | Miscellaneous | 65.37% |
| 2 | Healthcare | 6.71% |
| 3 | Communication Services | 4.77% |
| 4 | Technology | 4.7% |
| 5 | Consumer Discretionary | 4.67% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
ONIT
851
Onity Group
ONIT
$296M
| $220K | 0.02% |
2,188
+1,767
| +420% | +$224K |
|
|
GREK
852
Global X MSCI Greece ETF
GREK
$350M
| $219K | 0.02% |
+7,609
| New | +$226K |
|
853
ProShares UltraShort MidCap400
MZZ
$4.27M
| $219K | 0.02% |
+1,261
| New | +$199K |
|
|
INVN
854
PUT
DELISTED
Invensense Inc
INVN
| $219K | 0.02% |
789
+583
| +283% | +$6.55K |
|
855
CALL
Expedia Group
EXPE
$35.8B
| $218K | 0.02% |
380
+233
| +159% | +$26.9K |
|
856
PUT
Oneok
OKE
$60.2B
| $218K | 0.02% |
107
+18
| +20% | +$657 |
|
857
PUT
Precigen
PGEN
$2.54B
| $218K | 0.02% |
201
+16
| +9% | +$781 |
|
858
PUT
XPO
XPO
$22.6B
| $218K | 0.02% |
330
+188
| +132% | +$2.47K |
|
|
DMND
859
DELISTED
DIAMOND FOODS, INC.
DMND
| $218K | 0.02% |
7,096
-10,406
| -59% | -$326K |
|
860
Freeport-McMoran
FCX
$104B
| $217K | 0.02% |
22,494
+8,982
| +66% | +$108K |
|
861
PUT
Nike
NKE
$57B
| $217K | 0.02% |
4,714
+2,538
| +117% | +$144K |
|
862
SLB Ltd
SLB
$85.3B
| $217K | 0.02% |
3,157
-8,135
| -72% | -$644K |
|
|
KKD
863
PUT
DELISTED
KRISPY KREME DOUGHNUTS INC
KKD
| $217K | 0.02% |
665
+30
| +5% | +$526 |
|
|
WPRT
864
PUT
Westport Fuel Systems
WPRT
$36.3M
| $215K | 0.02% |
11
-11
| -50% | -$409 |
|
|
PHH
865
DELISTED
PHH Corporation
PHH
| $215K | 0.02% |
+15,252
| New | +$298K |
|
866
PUT
Plains All American Pipeline
PAA
$18.1B
| $214K | 0.02% |
311
+40
| +15% | +$1.46K |
|
|
SWIR
867
PUT
DELISTED
Sierra Wireless
SWIR
| $214K | 0.02% |
606
+533
| +730% | +$12.3K |
|
|
PERY
868
DELISTED
Perry Ellis International Inc
PERY
| $214K | 0.02% |
9,763
+7,040
| +259% | +$167K |
|
|
THOR
869
CALL
DELISTED
THORATEC CORPORATION
THOR
| $214K | 0.02% |
396
+375
| +1,786% | +$22.3K |
|
|
SYT
870
PUT
DELISTED
Syngenta Ag
SYT
| $213K | 0.02% |
253
+205
| +427% | +$15.6K |
|
|
LNCO
871
PUT
DELISTED
LINNCO LLC COM SHS REPSTG LTD LIABILITY
LNCO
| $213K | 0.02% |
180
-2
| -1% | -$9 |
|
872
CALL
Myriad Genetics
MYGN
$305M
| $212K | 0.02% |
182
-92
| -34% | -$3.27K |
|
873
PUT
Allstate
ALL
$65.6B
| $211K | 0.02% |
385
+155
| +67% | +$9.69K |
|
874
PUT
Eaton
ETN
$160B
| $211K | 0.02% |
299
+204
| +215% | +$12K |
|
875
Illinois Tool Works
ITW
$76.9B
| $211K | 0.02% |
+2,569
| New | +$225K |
|
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 withdrew a net $47.8M in Q3 2015, closing 1,420 positions and reducing 1,391 holdings. Its most notable exit was IBM, an estimated $12.7M position sold in full.
By sector, the portfolio is most concentrated in Miscellaneous at 65% of assets, up from 42% a quarter earlier, followed by Healthcare and Communication Services.
Against the trend, Simplex Trading opened a new position in iShares Russell 2000 ETF worth $27.5M.
- 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.