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 | |
|---|---|---|---|---|---|---|
476
CALL
Capital One
COF
$124B
| $831K | 0.04% |
887
-798
| -47% | -$72.8K |
|
477
Molson Coors Class B
TAP
$7.7B
| $826K | 0.04% |
10,076
-12,808
| -56% | -$1.04M |
|
478
Under Armour Class C
UA
$3.02B
| $824K | 0.04% |
61,905
+22,710
| +58% | +$297K |
|
479
PUT
Applied Materials
AMAT
$440B
| $821K | 0.04% |
3,579
+577
| +19% | +$31.3K |
|
480
CALL
Morgan Stanley
MS
$343B
| $821K | 0.04% |
2,824
-567
| -17% | -$28.7K |
|
|
MNK
481
PUT
DELISTED
MALLINCKRODT PUBLIC LIMITED COMPANY
MNK
| $820K | 0.04% |
1,525
+1,011
| +197% | +$27.1K |
|
482
Golar LNG
GLNG
$5.06B
| $818K | 0.04% |
27,474
-42,101
| -61% | -$1.01M |
|
|
TFCF
483
DELISTED
Twenty-First Century Fox, Inc. Class B
TFCF
| $817K | 0.04% |
23,949
-2,847
| -11% | -$83.2K |
|
484
Galicia Financial Group
GGAL
$8.55B
| $816K | 0.04% |
+12,399
| New | +$711K |
|
|
GRUB
485
DELISTED
Just Eat Takeaway.com N.V. American Depositary Shares
GRUB
| $813K | 0.04% |
+5,667
| New | +$711K |
|
|
ATVI
486
DELISTED
Activision Blizzard
ATVI
| $810K | 0.03% |
12,807
-12,262
| -49% | -$775K |
|
|
AMAG
487
DELISTED
AMAG Pharmaceuticals
AMAG
| $806K | 0.03% |
+60,897
| New | +$918K |
|
488
Monster Beverage
MNST
$93.6B
| $804K | 0.03% |
+25,422
| New | +$761K |
|
489
iShares MSCI Singapore ETF
EWS
$1.03B
| $802K | 0.03% |
30,954
+27,814
| +886% | +$715K |
|
490
Waste Management
WM
$94.9B
| $802K | 0.03% |
+9,302
| New | +$757K |
|
491
PUT
Biogen
BIIB
$29.2B
| $801K | 0.03% |
1,626
+366
| +29% | +$117K |
|
492
CALL
Amgen
AMGN
$198B
| $797K | 0.03% |
1,709
-1,447
| -46% | -$256K |
|
|
MB
493
DELISTED
MINDBODY, Inc. Class A Common Stock
MB
| $795K | 0.03% |
+26,112
| New | +$804K |
|
494
PUT
Intel
INTC
$516B
| $793K | 0.03% |
6,825
+2,429
| +55% | +$106K |
|
495
Melco Resorts & Entertainment
MLCO
$2.12B
| $792K | 0.03% |
27,273
+17,070
| +167% | +$435K |
|
496
CALL
Western Digital
WDC
$192B
| $790K | 0.03% |
6,209
+3,062
| +97% | +$197K |
|
497
UFP Industries
UFPI
$4.9B
| $789K | 0.03% |
20,978
+16,724
| +393% | +$615K |
|
|
PPLC
498
PUT
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $783K | 0.03% |
845
-1,567
| -65% | -$54.7K |
|
499
Fluor
FLR
$7.21B
| $782K | 0.03% |
15,153
+11,529
| +318% | +$537K |
|
|
HDS
500
DELISTED
HD Supply Holdings, Inc.
HDS
| $782K | 0.03% |
+19,553
| New | +$718K |
|
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.