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 |
Alphabet (Google) Class C
GOOG
|
+$54.6M |
| 2 |
Apple
AAPL
|
+$29.1M |
| 3 |
Meta Platforms (Facebook)
META
|
+$15.7M |
| 4 |
IBM
IBM
|
+$13.8M |
| 5 |
Baidu
BIDU
|
+$10.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$10.1M |
| 2 |
McDonald's
MCD
|
+$8.46M |
| 3 |
Ralph Lauren
RL
|
+$5.36M |
| 4 |
Intel
INTC
|
+$5.04M |
| 5 |
WBA
Walgreens Boots Alliance
WBA
|
+$4.76M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 14.27% |
| 2 | Technology | 10.3% |
| 3 | Healthcare | 7.76% |
| 4 | Consumer Discretionary | 6.32% |
| 5 | Financials | 5.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
ETFC
601
DELISTED
E*Trade Financial Corporation
ETFC
| $289K | 0.02% |
9,678
-20,046
| -67% | -$589K |
|
602
PUT
ConocoPhillips
COP
$145B
| $288K | 0.02% |
927
+333
| +56% | +$21.7K |
|
603
Flowserve
FLS
$8.77B
| $288K | 0.02% |
5,480
+4,726
| +627% | +$263K |
|
|
STJ
604
DELISTED
St Jude Medical
STJ
| $288K | 0.02% |
3,947
+1,009
| +34% | +$72.9K |
|
|
BBL
605
DELISTED
BHP Group Plc American Depositary Shares (Each representing two Ordinary Shares)
BBL
| $288K | 0.02% |
+7,297
| New | +$322K |
|
606
Banco Macro
BMA
$6.24B
| $287K | 0.02% |
+6,312
| New | +$335K |
|
607
CALL
Starbucks
SBUX
$119B
| $287K | 0.02% |
311
-1,025
| -77% | -$52K |
|
608
Bankunited
BKU
$3.34B
| $286K | 0.02% |
7,981
+6,080
| +320% | +$207K |
|
609
Opko Health
OPK
$891M
| $286K | 0.02% |
17,825
+12,015
| +207% | +$187K |
|
610
PUT
Banco Santander
SAN
$197B
| $286K | 0.02% |
965
+953
| +7,942% | +$6.64K |
|
|
PTR
611
DELISTED
PETROCHINA COMPANY LIMITED ADS (REP 100 H SHARES)
PTR
| $286K | 0.02% |
2,590
+2,193
| +552% | +$267K |
|
|
B
612
Barrick Mining
B
$62.8B
| $285K | 0.02% |
26,805
+19,093
| +248% | +$233K |
|
613
Lesaka Technologies
LSAK
$396M
| $285K | 0.02% |
15,643
+15,176
| +3,250% | +$229K |
|
|
PARA
614
CALL
DELISTED
Paramount Global Class B
PARA
| $284K | 0.02% |
414
-372
| -47% | -$22.5K |
|
|
WBA
615
CALL
DELISTED
Walgreens Boots Alliance
WBA
| $284K | 0.02% |
1,336
+634
| +90% | +$54.7K |
|
616
CALL
Yum! Brands
YUM
$40.7B
| $284K | 0.02% |
682
-382
| -36% | -$24.2K |
|
|
TERP
617
DELISTED
TerraForm Power, Inc
TERP
| $284K | 0.02% |
+7,502
| New | +$296K |
|
618
Jones Lang LaSalle
JLL
$15B
| $283K | 0.02% |
1,657
+1,297
| +360% | +$219K |
|
|
AAIC
619
DELISTED
Arlington Asset Investment Corp.
AAIC
| $283K | 0.02% |
14,479
+8,281
| +134% | +$181K |
|
|
DNB
620
DELISTED
Dun & Bradstreet
DNB
| $283K | 0.02% |
+2,324
| New | +$299K |
|
621
PUT
Chord Energy
CHRD
$7.74B
| $282K | 0.02% |
167
-188
| -53% | -$3.17K |
|
622
Jack in the Box
JACK
$272M
| $282K | 0.02% |
3,207
+2,671
| +498% | +$240K |
|
623
GameStop
GME
$9.69B
| $281K | 0.02% |
+26,256
| New | +$270K |
|
624
Herc Holdings
HRI
$5.04B
| $281K | 0.02% |
5,180
-3,637
| -41% | -$225K |
|
625
Incyte
INCY
$23.1B
| $281K | 0.02% |
2,705
-946
| -26% | -$97.9K |
|
Similar funds
Simplex Trading's Q2 2015 Portfolio in Review
As of Q2 2015, Simplex Trading held 6,639 positions worth $1.19B, up 39% from $860M the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $279M of net new capital in Q2 2015, opening 1,607 new positions and adding to 1,829 existing holdings. Its largest new stake was IBM: 85,948 shares worth $13.4M.
By sector, the portfolio is most concentrated in Communication Services at 14% of assets, up from 7.8% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Intel, an estimated $5.04M trimmed.
- Simplex Trading's largest Q2 2015 buy was IBM: 85,948 shares worth $13.4M.
- Simplex Trading added most to Alphabet (Google) Class C in Q2 2015, an estimated $54.6M increase.
- Simplex Trading's biggest Q2 2015 reduction was Intel, cutting an estimated $5.04M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q2 2015, selling an estimated $10.1M.
- Simplex Trading's ten largest holdings make up 20% of its $1.19B portfolio in Q2 2015.
- Simplex Trading opened 1,607 new positions and closed 1,438 in Q2 2015.
- Simplex Trading's portfolio value rose 39% quarter-over-quarter to $1.19B.
Based on Simplex Trading's 13F filing for Q2 2015, filed 8 Jul 2015.