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 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$49.8M |
| 2 |
Apple
AAPL
|
+$24.5M |
| 3 |
Citigroup
C
|
+$23.5M |
| 4 |
Amazon
AMZN
|
+$22.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$18.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
LNKD
LinkedIn Corporation
LNKD
|
+$17.4M |
| 2 |
Wells Fargo
WFC
|
+$13.5M |
| 3 |
MDVN
MEDIVATION, INC.
MDVN
|
+$8.62M |
| 4 |
Goldman Sachs
GS
|
+$8.5M |
| 5 |
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
|
+$8.15M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 8.76% |
| 2 | Technology | 7.19% |
| 3 | Healthcare | 6.91% |
| 4 | Consumer Discretionary | 6.53% |
| 5 | Financials | 5.37% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
QGENF
1376
DELISTED
QIAGEN NV
QGENF
| $123K | 0.01% |
4,390
-2,118
| -33% | -$59.3K |
|
1377
Coherent
COHR
$55.2B
| $122K | 0.01% |
4,115
-12,014
| -74% | -$342K |
|
1378
CALL
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$105M
| $122K | 0.01% |
1,648
-343
| -17% | -$6.72K |
|
1379
CALL
Kohl's
KSS
$2.03B
| $122K | 0.01% |
916
+251
| +38% | +$12.4K |
|
1380
PUT
Neurocrine Biosciences
NBIX
$17.7B
| $122K | 0.01% |
263
+229
| +674% | +$10.4K |
|
1381
PUT
United Rentals
URI
$71.1B
| $122K | 0.01% |
615
+211
| +52% | +$19.2K |
|
1382
PUT
Vipshop
VIPS
$6.84B
| $122K | 0.01% |
617
+130
| +27% | +$1.68K |
|
1383
PUT
Altisource Portfolio Solutions
ASPS
$65.4M
| $121K | 0.01% |
62
-20
| -24% | -$4.46K |
|
1384
Insulet
PODD
$11.3B
| $121K | 0.01% |
+3,214
| New | +$120K |
|
1385
PUT
Workday
WDAY
$33.4B
| $121K | 0.01% |
143
+2
| +1% | +$161 |
|
|
SWIR
1386
PUT
DELISTED
Sierra Wireless
SWIR
| $121K | 0.01% |
549
+9
| +2% | +$134 |
|
|
AERI
1387
PUT
DELISTED
Aerie Pharmaceuticals
AERI
| $121K | 0.01% |
343
-433
| -56% | -$16.4K |
|
|
WUBA
1388
PUT
DELISTED
58.com Inc
WUBA
| $121K | 0.01% |
366
+333
| +1,009% | +$12.4K |
|
1389
CALL
Albemarle
ALB
$13.5B
| $120K | 0.01% |
337
+132
| +64% | +$11.2K |
|
1390
Dolby
DLB
$4.72B
| $120K | 0.01% |
+2,660
| New | +$128K |
|
1391
PUT
Ford
F
$57.3B
| $120K | 0.01% |
1,506
+411
| +38% | +$4.99K |
|
1392
PUT
GameStop
GME
$9.5B
| $120K | 0.01% |
3,844
+1,188
| +45% | +$7.34K |
|
1393
PUT
Kroger
KR
$34.8B
| $120K | 0.01% |
1,391
+78
| +6% | +$2.54K |
|
1394
PUT
Royal Gold
RGLD
$17.1B
| $120K | 0.01% |
334
-55
| -14% | -$3.74K |
|
1395
CALL
Southern Company
SO
$110B
| $120K | 0.01% |
1,037
-520
| -33% | -$25.5K |
|
1396
Energous
WATT
$80.3M
| $120K | 0.01% |
+12
| New | +$115K |
|
|
GRUB
1397
CALL
DELISTED
Just Eat Takeaway.com N.V. American Depositary Shares
GRUB
| $120K | 0.01% |
219
+5
| +2% | +$385 |
|
|
RNET
1398
CALL
DELISTED
RigNet, Inc.
RNET
| $120K | 0.01% |
148
-233
| -61% | -$4.13K |
|
1399
Barings BDC
BBDC
$862M
| $119K | 0.01% |
+6,534
| New | +$122K |
|
1400
Genesis Energy
GEL
$1.84B
| $119K | 0.01% |
+3,313
| New | +$116K |
|
Similar funds
Simplex Trading's Q4 2016 Portfolio in Review
As of Q4 2016, Simplex Trading held 7,301 positions worth $1.67B, up 13% from $1.48B the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $181M of net new capital in Q4 2016, opening 1,543 new positions and adding to 2,137 existing holdings. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
By sector, the portfolio is most concentrated in Communication Services at 8.8% of assets, up from 8.4% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Goldman Sachs, an estimated $8.5M trimmed.
- Simplex Trading's largest Q4 2016 buy was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
- Simplex Trading added most to Apple in Q4 2016, an estimated $24.5M increase.
- Simplex Trading's biggest Q4 2016 reduction was Goldman Sachs, cutting an estimated $8.5M.
- Simplex Trading fully exited LinkedIn Corporation in Q4 2016, selling an estimated $17.4M.
- Simplex Trading's ten largest holdings make up 20% of its $1.67B portfolio in Q4 2016.
- Simplex Trading opened 1,543 new positions and closed 1,480 in Q4 2016.
- Simplex Trading's portfolio value rose 13% quarter-over-quarter to $1.67B.
Based on Simplex Trading's 13F filing for Q4 2016, filed 11 Jan 2017.