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 | |
|---|---|---|---|---|---|---|
3526
PUT
Copart
CPRT
$28.4B
| $9K | ﹤0.01% |
+360
| New | +$1.59K |
|
3527
PUT
Criteo
CRTO
$1.06B
| $9K | ﹤0.01% |
11
-3
| -21% | -$137 |
|
3528
PUT
Dick's Sporting Goods
DKS
$18.9B
| $9K | ﹤0.01% |
35
+16
| +84% | +$808 |
|
3529
CALL
eBay
EBAY
$52.1B
| $9K | ﹤0.01% |
372
-2,584
| -87% | -$69.5K |
|
3530
CALL
Eastman Chemical
EMN
$7.79B
| $9K | ﹤0.01% |
95
+27
| +40% | +$1.99K |
|
3531
CALL
Exelon
EXC
$48.4B
| $9K | ﹤0.01% |
+468
| New | +$10.5K |
|
|
KYNB
3532
PUT
Kyntra Bio
KYNB
$28.2M
| $9K | ﹤0.01% |
+2
| New | +$1.21K |
|
3533
PUT
Flowserve
FLS
$9.38B
| $9K | ﹤0.01% |
10
-13
| -57% | -$595 |
|
3534
Fortuna Silver Mines
FSM
$2.55B
| $9K | ﹤0.01% |
4,214
-343
| -8% | -$916 |
|
3535
PUT
Cedar Fair
FUN
$1.91B
| $9K | ﹤0.01% |
+18
| New | +$977 |
|
3536
PUT
Goodyear
GT
$2.12B
| $9K | ﹤0.01% |
100
-36
| -26% | -$1.08K |
|
3537
CALL
Hain Celestial
HAIN
$44.8M
| $9K | ﹤0.01% |
86
+8
| +10% | +$506 |
|
3538
CALL
Honda
HMC
$39.3B
| $9K | ﹤0.01% |
+41
| New | +$1.31K |
|
3539
CALL
Harley-Davidson
HOG
$2.66B
| $9K | ﹤0.01% |
1,042
+869
| +502% | +$49K |
|
|
IMOS
3540
CALL
ChipMOS TECHNOLOGIES
IMOS
$1.73B
| $9K | ﹤0.01% |
+93
| New | +$1.84K |
|
3541
PUT
Infosys
INFY
$50B
| $9K | ﹤0.01% |
334
-1,306
| -80% | -$11.2K |
|
|
K
3542
PUT
DELISTED
Kellanova
K
| $9K | ﹤0.01% |
38
+14
| +58% | +$873 |
|
3543
PUT
Liberty Latin America Class C
LILAK
$1.65B
| $9K | ﹤0.01% |
+29
| New | +$982 |
|
3544
Lattice Semiconductor
LSCC
$16.4B
| $9K | ﹤0.01% |
2,367
-1,132
| -32% | -$5.21K |
|
3545
PUT
Macerich
MAC
$7.52B
| $9K | ﹤0.01% |
20
+12
| +150% | +$929 |
|
3546
PUT
MiMedx Group
MDXG
$649M
| $9K | ﹤0.01% |
77
+22
| +40% | +$232 |
|
3547
PUT
OneSpan
OSPN
$572M
| $9K | ﹤0.01% |
37
-98
| -73% | -$2.01K |
|
3548
PUT
Open Text
OTEX
$6.02B
| $9K | ﹤0.01% |
42
-34
| -45% | -$735 |
|
3549
CALL
Children's Place
PLCE
$55.8M
| $9K | ﹤0.01% |
280
+115
| +70% | +$6.92K |
|
3550
CALL
PVH
PVH
$4.01B
| $9K | ﹤0.01% |
83
+8
| +11% | +$909 |
|
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.