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 | |
|---|---|---|---|---|---|---|
|
AJRD
1451
CALL
DELISTED
Aerojet Rocketdyne Holdings
AJRD
| $159K | 0.01% |
686
-56
| -8% | -$1.77K |
|
1452
CALL
Cleveland-Cliffs
CLF
$6.52B
| $158K | 0.01% |
1,468
+849
| +137% | +$5.65K |
|
1453
iShares MSCI France ETF
EWQ
$325M
| $158K | 0.01% |
5,092
+3,963
| +351% | +$123K |
|
|
EXAS
1454
PUT
DELISTED
Exact Sciences
EXAS
| $158K | 0.01% |
617
+10
| +2% | +$534 |
|
|
LL
1455
CALL
DELISTED
LL Flooring Holdings, Inc.
LL
| $158K | 0.01% |
472
-113
| -19% | -$3.58K |
|
1456
CALL
Apollo Global Management
APO
$70.1B
| $157K | 0.01% |
551
-103
| -16% | -$3.23K |
|
1457
CALL
Peabody Energy
BTU
$2.82B
| $157K | 0.01% |
296
+243
| +458% | +$7.89K |
|
|
PARA
1458
CALL
DELISTED
Paramount Global Class B
PARA
| $157K | 0.01% |
1,681
+1,181
| +236% | +$67.9K |
|
1459
PUT
Valero Energy
VLO
$90.1B
| $157K | 0.01% |
2,630
+1,068
| +68% | +$88.1K |
|
1460
Coty
COTY
$2.33B
| $156K | 0.01% |
7,853
-46,345
| -86% | -$791K |
|
1461
CALL
Energy Transfer Partners
ET
$70.2B
| $156K | 0.01% |
1,468
-1,772
| -55% | -$30.2K |
|
1462
Helios Technologies
HLIO
$2.65B
| $156K | 0.01% |
+2,414
| New | +$141K |
|
1463
PUT
Coca-Cola
KO
$354B
| $156K | 0.01% |
3,378
+2,166
| +179% | +$99.6K |
|
1464
CALL
Liberty Latin America Class C
LILAK
$1.51B
| $156K | 0.01% |
889
-1,484
| -63% | -$27.9K |
|
1465
MarketAxess Holdings
MKTX
$4.08B
| $156K | 0.01% |
+776
| New | +$146K |
|
|
TGNA
1466
CALL
DELISTED
TEGNA Inc
TGNA
| $156K | 0.01% |
391
+303
| +344% | +$3.96K |
|
1467
Unisys
UIS
$233M
| $156K | 0.01% |
19,263
+3,567
| +23% | +$29.2K |
|
|
SAVE
1468
CALL
DELISTED
Spirit Airlines, Inc.
SAVE
| $156K | 0.01% |
206
+7
| +4% | +$269 |
|
1469
CALL
Axogen
AXGN
$2.15B
| $155K | 0.01% |
289
+210
| +266% | +$4.96K |
|
1470
Dolby
DLB
$4.7B
| $155K | 0.01% |
2,506
-5,026
| -67% | -$304K |
|
1471
PUT
Devon Energy
DVN
$52B
| $155K | 0.01% |
1,337
+321
| +32% | +$12.1K |
|
1472
PUT
National Beverage
FIZZ
$2.87B
| $155K | 0.01% |
562
+308
| +121% | +$15.8K |
|
|
MAG
1473
DELISTED
MAG Silver
MAG
| $155K | 0.01% |
12,604
+5,691
| +82% | +$64.2K |
|
1474
POSCO
PKX
$16B
| $155K | 0.01% |
1,994
+1,879
| +1,634% | +$139K |
|
1475
Travel + Leisure Co
TNL
$4.57B
| $155K | 0.01% |
2,979
-27,404
| -90% | -$1.36M |
|
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.