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 |
CELG
Celgene Corp
CELG
|
+$31.6M |
| 2 |
Citigroup
C
|
+$19.5M |
| 3 |
AGN
Allergan plc
AGN
|
+$18.4M |
| 4 |
Baidu
BIDU
|
+$18M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$14.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$81.3M |
| 2 |
NVIDIA
NVDA
|
+$60.2M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$48.2M |
| 4 |
Apple
AAPL
|
+$48.2M |
| 5 |
Meta Platforms (Facebook)
META
|
+$31.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 11.27% |
| 2 | Technology | 10.64% |
| 3 | Healthcare | 7.06% |
| 4 | Communication Services | 6.92% |
| 5 | Industrials | 5.66% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3251
PUT
FirstEnergy
FE
$28.5B
| $21K | ﹤0.01% |
258
-40
| -13% | -$1.3K |
|
3252
PUT
Genesis Energy
GEL
$1.81B
| $21K | ﹤0.01% |
152
+99
| +187% | +$2.29K |
|
3253
CALL
GoPro
GPRO
$119M
| $21K | ﹤0.01% |
374
-46
| -11% | -$408 |
|
3254
CALL
Goodyear
GT
$2.04B
| $21K | ﹤0.01% |
168
-217
| -56% | -$6.89K |
|
3255
Hooker Furnishings Corp
HOFT
$149M
| $21K | ﹤0.01% |
+509
| New | +$23.7K |
|
|
HOLX
3256
DELISTED
Hologic
HOLX
| $21K | ﹤0.01% |
+505
| New | +$20.1K |
|
3257
CALL
HP
HPQ
$24.3B
| $21K | ﹤0.01% |
406
-28
| -6% | -$596 |
|
3258
PUT
Immersion
IMMR
$256M
| $21K | ﹤0.01% |
233
+225
| +2,813% | +$1.63K |
|
3259
PUT
Jazz Pharmaceuticals
JAZZ
$16B
| $21K | ﹤0.01% |
101
-88
| -47% | -$12.2K |
|
3260
State Street SPDR S&P Insurance ETF
KIE
$654M
| $21K | ﹤0.01% |
+715
| New | +$21.9K |
|
3261
PUT
Kimberly-Clark
KMB
$37B
| $21K | ﹤0.01% |
624
-55
| -8% | -$6.42K |
|
3262
Kearny Financial
KRNY
$595M
| $21K | ﹤0.01% |
1,464
+425
| +41% | +$6.31K |
|
3263
PUT
Southwest Airlines
LUV
$22.2B
| $21K | ﹤0.01% |
731
-58
| -7% | -$3.41K |
|
3264
PUT
Melco Resorts & Entertainment
MLCO
$2.18B
| $21K | ﹤0.01% |
1,439
+149
| +12% | +$3.8K |
|
3265
CALL
Marcus & Millichap
MMI
$1.18B
| $21K | ﹤0.01% |
+83
| New | +$2.47K |
|
3266
PUT
Repligen
RGEN
$7.39B
| $21K | ﹤0.01% |
57
-18
| -24% | -$652 |
|
3267
CALL
Ralph Lauren
RL
$22.6B
| $21K | ﹤0.01% |
46
-211
| -82% | -$19.5K |
|
3268
PUT
SAP
SAP
$200B
| $21K | ﹤0.01% |
194
-230
| -54% | -$26K |
|
3269
abrdn Physical Silver Shares ETF
SIVR
$4.06B
| $21K | ﹤0.01% |
1,295
-4,216
| -77% | -$68.8K |
|
|
SRDX
3270
DELISTED
Surmodics
SRDX
| $21K | ﹤0.01% |
+755
| New | +$23K |
|
3271
PUT
Travel + Leisure Co
TNL
$4.68B
| $21K | ﹤0.01% |
594
-66
| -10% | -$3.27K |
|
3272
PUT
Tractor Supply
TSCO
$16.7B
| $21K | ﹤0.01% |
1,680
-270
| -14% | -$3.47K |
|
3273
CALL
Textron
TXT
$16.7B
| $21K | ﹤0.01% |
45
-474
| -91% | -$25.8K |
|
3274
PUT
Corpay
CPAY
$24.8B
| $21K | ﹤0.01% |
276
-208
| -43% | -$36.6K |
|
|
VJET
3275
DELISTED
VOXELJET AG American Depositary Shares (each representing one Ordinary Share)
VJET
| $21K | ﹤0.01% |
955
+293
| +44% | +$7.51K |
|
Similar funds
Simplex Trading's Q4 2017 Portfolio in Review
As of Q4 2017, Simplex Trading held 7,407 positions worth $2.32B, down 5.1% from $2.45B the previous quarter. Its ten largest holdings account for 17% of the portfolio.
Simplex Trading withdrew a net $315M in Q4 2017, closing 1,460 positions and reducing 2,239 holdings. Its most notable exit was iShares 20+ Year Treasury Bond ETF, an estimated $21.1M position sold in full.
By sector, the portfolio is most concentrated in Consumer Discretionary at 11% of assets, down from 14% a quarter earlier, followed by Technology and Healthcare.
Against the trend, Simplex Trading opened a new position in Celgene Corp worth $29.2M.
- Simplex Trading's largest Q4 2017 buy was Celgene Corp: 280,194 shares worth $29.2M.
- Simplex Trading added most to Baidu in Q4 2017, an estimated $18M increase.
- Simplex Trading's biggest Q4 2017 reduction was Amazon, cutting an estimated $81.3M.
- Simplex Trading fully exited iShares 20+ Year Treasury Bond ETF in Q4 2017, selling an estimated $21.1M.
- Simplex Trading's ten largest holdings make up 17% of its $2.32B portfolio in Q4 2017.
- Simplex Trading opened 1,548 new positions and closed 1,460 in Q4 2017.
- Simplex Trading's portfolio value fell 5.1% quarter-over-quarter to $2.32B.
Based on Simplex Trading's 13F filing for Q4 2017, filed 10 Jan 2018.