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 | |
|---|---|---|---|---|---|---|
|
SUM
576
DELISTED
Summit Materials, Inc. Class A Common Stock
SUM
| $663K | 0.03% |
+21,450
| New | +$646K |
|
577
CALL
General Motors
GM
$71.8B
| $661K | 0.03% |
5,138
-230
| -4% | -$9.98K |
|
578
CALL
Kohl's
KSS
$2.04B
| $661K | 0.03% |
1,148
-75
| -6% | -$3.45K |
|
|
SGMO
579
CALL
DELISTED
SANGAMO THERAPEUTICS INC
SGMO
| $659K | 0.03% |
1,240
-34
| -3% | -$506 |
|
580
BP
BP
$114B
| $658K | 0.03% |
+17,107
| New | +$620K |
|
581
Alcoa
AA
$11.9B
| $655K | 0.03% |
+12,174
| New | +$557K |
|
582
CALL
Stellantis
STLA
$16.5B
| $652K | 0.03% |
1,634
-752
| -32% | -$13.2K |
|
583
CALL
Alnylam Pharmaceuticals
ALNY
$35.4B
| $651K | 0.03% |
282
-350
| -55% | -$44K |
|
|
LVNTA
584
CALL
DELISTED
Liberty Interactive Corporation Series A Liberty Ventures
LVNTA
| $648K | 0.03% |
889
-371
| -29% | -$21.1K |
|
|
PXD
585
CALL
DELISTED
Pioneer Natural Resource Co.
PXD
| $647K | 0.03% |
394
-82
| -17% | -$12.6K |
|
586
PUT
Palo Alto Networks
PANW
$264B
| $645K | 0.03% |
10,500
+2,190
| +26% | +$53.3K |
|
587
PUT
Morgan Stanley
MS
$337B
| $644K | 0.03% |
6,486
+3,503
| +117% | +$177K |
|
588
CALL
Autodesk
ADSK
$42.8B
| $642K | 0.03% |
826
+164
| +25% | +$19.1K |
|
|
OAK
589
DELISTED
OAKTREE CAPITAL GROUP, LLC
OAK
| $641K | 0.03% |
15,236
+11,667
| +327% | +$516K |
|
|
S
590
DELISTED
Sprint Corporation
S
| $640K | 0.03% |
108,702
+107,437
| +8,493% | +$682K |
|
591
PUT
Skyworks Solutions
SWKS
$9.07B
| $639K | 0.03% |
1,299
+37
| +3% | +$3.86K |
|
592
Olin
OLN
$2.74B
| $636K | 0.03% |
17,892
+9,194
| +106% | +$327K |
|
593
CALL
PepsiCo
PEP
$184B
| $636K | 0.03% |
1,507
+1,133
| +303% | +$129K |
|
|
CSRA
594
DELISTED
CSRA Inc.
CSRA
| $636K | 0.03% |
+21,277
| New | +$643K |
|
595
CALL
TJX Companies
TJX
$169B
| $635K | 0.03% |
3,358
+1,826
| +119% | +$66.2K |
|
596
Copa Holdings
CPA
$5.46B
| $632K | 0.03% |
4,721
-3,311
| -41% | -$431K |
|
597
Jacobs Solutions
J
$15.5B
| $632K | 0.03% |
11,595
+9,251
| +395% | +$474K |
|
|
SCHW
598
CALL
Charles Schwab
SCHW
$177B
| $632K | 0.03% |
1,375
+888
| +182% | +$41.7K |
|
599
Viatris
VTRS
$19.8B
| $630K | 0.03% |
+14,899
| New | +$570K |
|
600
PUT
3D Systems Corp
DDD
$426M
| $628K | 0.03% |
675
-1,002
| -60% | -$10.3K |
|
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.