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 | |
|---|---|---|---|---|---|---|
4201
PUT
ScottsMiracle-Gro
SMG
$4.14B
| $4K | ﹤0.01% |
+18
| New | +$1.11K |
|
|
SNBR
4202
PUT
DELISTED
Sleep Number
SNBR
| $4K | ﹤0.01% |
55
+2
| +4% | +$51 |
|
4203
PUT
Sasol
SSL
$7.07B
| $4K | ﹤0.01% |
4
-5
| -56% | -$160 |
|
4204
Stratasys
SSYS
$691M
| $4K | ﹤0.01% |
153
-12,954
| -99% | -$400K |
|
4205
PUT
Tredegar Corp
TG
$266M
| $4K | ﹤0.01% |
+15
| New | +$251 |
|
4206
CALL
Tenet Healthcare
THC
$22.1B
| $4K | ﹤0.01% |
177
-199
| -53% | -$10.3K |
|
4207
CALL
Teekay
TK
$983M
| $4K | ﹤0.01% |
+163
| New | +$5.83K |
|
4208
CALL
Talphera
TLPH
$65.9M
| $4K | ﹤0.01% |
+17
| New | +$1.4K |
|
4209
PUT
Tronox
TROX
$991M
| $4K | ﹤0.01% |
+8
| New | +$74 |
|
4210
CALL
Toro Company
TTC
$9.07B
| $4K | ﹤0.01% |
+64
| New | +$2.22K |
|
4211
PUT
Tetra Tech
TTEK
$8.65B
| $4K | ﹤0.01% |
+150
| New | +$767 |
|
4212
PUT
TETRA Technologies
TTI
$1.06B
| $4K | ﹤0.01% |
+11
| New | +$70 |
|
4213
United States Gasoline Fund
UGA
$142M
| $4K | ﹤0.01% |
+152
| New | +$5.24K |
|
4214
CALL
United Therapeutics
UTHR
$26.1B
| $4K | ﹤0.01% |
43
-40
| -48% | -$6.42K |
|
4215
CALL
Valmont Industries
VMI
$9.33B
| $4K | ﹤0.01% |
+208
| New | +$22.8K |
|
4216
PUT
VeriSign
VRSN
$25.7B
| $4K | ﹤0.01% |
+85
| New | +$5.79K |
|
4217
Vishay Intertechnology
VSH
$5.08B
| $4K | ﹤0.01% |
480
+209
| +77% | +$2.22K |
|
|
4218
PUT
Vishay Intertechnology
VSH
$5.08B
| $4K | ﹤0.01% |
+15
| New | +$159 |
|
4219
CALL
WIX.com
WIX
$2.42B
| $4K | ﹤0.01% |
309
+88
| +40% | +$1.97K |
|
4220
CALL
Wipro
WIT
$19B
| $4K | ﹤0.01% |
+347
| New | +$786 |
|
4221
PUT
W.R. Berkley
WRB
$28.3B
| $4K | ﹤0.01% |
+57
| New | +$934 |
|
4222
W&T Offshore
WTI
$478M
| $4K | ﹤0.01% |
1,384
-2,002
| -59% | -$7.45K |
|
4223
CALL
Xcel Energy
XEL
$50.5B
| $4K | ﹤0.01% |
18
-167
| -90% | -$5.68K |
|
4224
Xylem
XYL
$29.6B
| $4K | ﹤0.01% |
136
-13
| -9% | -$437 |
|
|
ENFY
4225
PUT
DELISTED
Enlightify Inc
ENFY
| $4K | ﹤0.01% |
8
+6
| +300% | +$136 |
|
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.