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 | |
|---|---|---|---|---|---|---|
726
PUT
Verizon
VZ
$185B
| $282K | 0.02% |
550
-3
| -0.5% | -$138 |
|
|
GPOR
727
DELISTED
Gulfport Energy Corp.
GPOR
| $282K | 0.02% |
9,521
+6,916
| +265% | +$238K |
|
728
American Airlines Group
AAL
$9.78B
| $278K | 0.02% |
7,167
-143,672
| -95% | -$5.9M |
|
729
PUT
Shake Shack
SHAK
$2.26B
| $278K | 0.02% |
+221
| New | +$12K |
|
|
WW
730
PUT
DELISTED
WW International
WW
| $278K | 0.02% |
323
-213
| -40% | -$1.14K |
|
|
YHOO
731
CALL
DELISTED
Yahoo Inc
YHOO
| $278K | 0.02% |
3,319
+1,186
| +56% | +$41.2K |
|
732
PUT
Invesco CurrencyShares Euro Currency Trust
FXE
$332M
| $277K | 0.02% |
1,345
-88
| -6% | -$9.6K |
|
|
RJET
733
CALL
DELISTED
REPUBLIC AWYS HLDGS INC
RJET
| $275K | 0.02% |
+1,081
| New | +$5.51K |
|
734
CALL
Citigroup
C
$222B
| $274K | 0.02% |
5,534
+3,155
| +133% | +$172K |
|
|
OPLN
735
Openlane
OPLN
$4.2B
| $274K | 0.02% |
20,428
+20,214
| +9,446% | +$287K |
|
736
Lithia Motors
LAD
$7.75B
| $274K | 0.02% |
+2,538
| New | +$285K |
|
737
CALL
Synaptics
SYNA
$4.71B
| $274K | 0.02% |
315
+197
| +167% | +$14.9K |
|
738
CALL
lululemon athletica
LULU
$12.9B
| $272K | 0.02% |
1,681
+1,496
| +809% | +$91.2K |
|
739
PUT
Zoetis
ZTS
$31.1B
| $272K | 0.02% |
568
-103
| -15% | -$4.78K |
|
740
Lennox International
LII
$18.5B
| $271K | 0.02% |
2,400
+1,075
| +81% | +$126K |
|
741
BlackBerry
BB
$5.25B
| $270K | 0.02% |
44,200
-45,032
| -50% | -$336K |
|
742
CALL
JPMorgan Chase
JPM
$926B
| $270K | 0.02% |
2,081
+1,152
| +124% | +$75.5K |
|
743
CALL
Walmart Inc
WMT
$870B
| $270K | 0.02% |
8,196
+6,753
| +468% | +$155K |
|
|
HZNP
744
PUT
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
| $270K | 0.02% |
525
+502
| +2,183% | +$15.9K |
|
|
BDSI
745
PUT
DELISTED
BioDelivery Sciences International, Inc.
BDSI
| $270K | 0.02% |
710
+518
| +270% | +$3.82K |
|
746
United Therapeutics
UTHR
$26.2B
| $269K | 0.02% |
2,051
+1,473
| +255% | +$236K |
|
|
RVNC
747
DELISTED
Revance Therapeutics, Inc.
RVNC
| $269K | 0.02% |
+9,065
| New | +$275K |
|
748
GSK
GSK
$102B
| $268K | 0.02% |
5,586
-15,503
| -74% | -$807K |
|
749
CALL
Precigen
PGEN
$1.9B
| $268K | 0.02% |
358
+180
| +101% | +$8.78K |
|
750
PUT
United States Natural Gas Fund
UNG
$472M
| $268K | 0.02% |
50
+23
| +85% | +$4.8K |
|
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.