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 | |
|---|---|---|---|---|---|---|
3426
CALL
Ashland
ASH
$3.14B
| $17K | ﹤0.01% |
20
-6
| -23% | -$414 |
|
3427
CALL
AngloGold Ashanti
AU
$40.3B
| $17K | ﹤0.01% |
578
+38
| +7% | +$366 |
|
3428
PUT
BHP
BHP
$214B
| $17K | ﹤0.01% |
503
-619
| -55% | -$23.3K |
|
3429
CALL
Bankunited
BKU
$3.4B
| $17K | ﹤0.01% |
98
+6
| +7% | +$218 |
|
3430
Barnes & Noble Education
BNED
$439M
| $17K | ﹤0.01% |
21
-11
| -34% | -$7.27K |
|
|
3431
PUT
Barnes & Noble Education
BNED
$439M
| $17K | ﹤0.01% |
+1
| New | +$661 |
|
3432
PUT
Burlington
BURL
$23.4B
| $17K | ﹤0.01% |
123
-201
| -62% | -$20.5K |
|
3433
PUT
Credit Acceptance
CACC
$5.86B
| $17K | ﹤0.01% |
103
+73
| +243% | +$21.7K |
|
3434
PUT
Cal-Maine
CALM
$4.39B
| $17K | ﹤0.01% |
383
+104
| +37% | +$4.64K |
|
3435
COPT Defense Properties
CDP
$4.35B
| $17K | ﹤0.01% |
+613
| New | +$19.2K |
|
3436
CALL
Carvana
CVNA
$46.7B
| $17K | ﹤0.01% |
560
-1,410
| -72% | -$4.67K |
|
3437
8x8 Inc
EGHT
$274M
| $17K | ﹤0.01% |
1,261
-1,529
| -55% | -$21.1K |
|
3438
CALL
Howard Hughes
HHH
$3.95B
| $17K | ﹤0.01% |
+63
| New | +$7.51K |
|
|
HOLX
3439
PUT
DELISTED
Hologic
HOLX
| $17K | ﹤0.01% |
60
-215
| -78% | -$8.58K |
|
3440
PUT
Howmet Aerospace
HWM
$115B
| $17K | ﹤0.01% |
318
-51
| -14% | -$992 |
|
3441
Alliant Energy
LNT
$19.2B
| $17K | ﹤0.01% |
+419
| New | +$18.3K |
|
3442
CALL
MPLX
MPLX
$60B
| $17K | ﹤0.01% |
162
-724
| -82% | -$25.5K |
|
3443
CALL
Match Group
MTCH
$9.2B
| $17K | ﹤0.01% |
63
-300
| -83% | -$8.41K |
|
3444
PUT
NETSCOUT
NTCT
$2.9B
| $17K | ﹤0.01% |
+58
| New | +$1.77K |
|
3445
Regal Rexnord
RRX
$13.7B
| $17K | ﹤0.01% |
+231
| New | +$18K |
|
3446
CALL
Republic Services
RSG
$66.7B
| $17K | ﹤0.01% |
57
+42
| +280% | +$2.71K |
|
3447
PUT
Sinclair Inc
SBGI
$1.01B
| $17K | ﹤0.01% |
372
+106
| +40% | +$3.51K |
|
|
SCS
3448
CALL
DELISTED
Steelcase
SCS
| $17K | ﹤0.01% |
349
+245
| +236% | +$3.6K |
|
|
SNV
3449
CALL
DELISTED
Synovus
SNV
| $17K | ﹤0.01% |
79
-1
| -1% | -$47 |
|
|
NSLR
3450
Neostellar Capital Corp
NSLR
$269M
| $17K | ﹤0.01% |
3,934
+3,636
| +1,220% | +$18K |
|
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.