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 | |
|---|---|---|---|---|---|---|
776
Lands' End
LE
$361M
| $256K | 0.02% |
9,487
+8,188
| +630% | +$205K |
|
777
Sempra
SRE
$61.1B
| $256K | 0.02% |
+5,308
| New | +$261K |
|
|
GRMN
778
PUT
Garmin
GRMN
$46.2B
| $255K | 0.02% |
153
+13
| +9% | +$517 |
|
779
PUT
PepsiCo
PEP
$184B
| $255K | 0.02% |
870
-1,205
| -58% | -$115K |
|
780
Box
BOX
$3.92B
| $254K | 0.02% |
20,226
+19,845
| +5,209% | +$295K |
|
781
CALL
Costco
COST
$408B
| $254K | 0.02% |
1,027
+143
| +16% | +$20.4K |
|
782
PUT
Trinity Industries
TRN
$2.92B
| $254K | 0.02% |
279
-197
| -41% | -$3.74K |
|
783
PUT
BlackBerry
BB
$5.18B
| $252K | 0.02% |
558
-332
| -37% | -$2.48K |
|
784
KB Home
KBH
$3.45B
| $249K | 0.02% |
+18,420
| New | +$281K |
|
785
CALL
Charter Communications
CHTR
$15.7B
| $248K | 0.02% |
184
+99
| +116% | +$18.1K |
|
786
CALL
Cencora
COR
$58.5B
| $248K | 0.02% |
367
+302
| +465% | +$31.7K |
|
|
ADT
787
DELISTED
ADT Corp
ADT
| $248K | 0.02% |
8,323
+3,501
| +73% | +$114K |
|
788
CALL
Ionis Pharmaceuticals
IONS
$9.02B
| $247K | 0.02% |
651
+92
| +16% | +$4.76K |
|
|
RATE
789
DELISTED
Bankrate Inc
RATE
| $247K | 0.02% |
+23,959
| New | +$240K |
|
790
Suburban Propane Partners
SPH
$1.23B
| $246K | 0.02% |
+7,512
| New | +$277K |
|
791
CALL
Incyte
INCY
$23.1B
| $245K | 0.02% |
103
+6
| +6% | +$673 |
|
792
Restaurant Brands International
QSR
$25.2B
| $245K | 0.02% |
6,830
+2,692
| +65% | +$107K |
|
793
ProShares UltraPro Russell2000
URTY
$330M
| $245K | 0.02% |
+7,144
| New | +$320K |
|
|
ITCI
794
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $245K | 0.02% |
+6,143
| New | +$200K |
|
|
XLRN
795
DELISTED
Acceleron Pharma
XLRN
| $245K | 0.02% |
+9,852
| New | +$296K |
|
|
MDCO
796
DELISTED
Medicines Co
MDCO
| $245K | 0.02% |
6,471
-10,054
| -61% | -$353K |
|
797
Akamai
AKAM
$18.1B
| $244K | 0.02% |
+3,538
| New | +$255K |
|
798
Nu Skin
NUS
$248M
| $244K | 0.02% |
5,911
-3,353
| -36% | -$144K |
|
799
PUT
Wells Fargo
WFC
$260B
| $244K | 0.02% |
1,522
+1,128
| +286% | +$62K |
|
800
Northrop Grumman
NOC
$76.8B
| $242K | 0.02% |
1,461
-1,194
| -45% | -$200K |
|
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.