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 | |
|---|---|---|---|---|---|---|
1326
Take-Two Interactive
TTWO
$43B
| $132K | 0.01% |
2,688
+311
| +13% | +$14.7K |
|
1327
CALL
Wabtec
WAB
$51.1B
| $132K | 0.01% |
248
+203
| +451% | +$16.7K |
|
|
XCRA
1328
DELISTED
Xcerra Corporation
XCRA
| $132K | 0.01% |
17,311
+10,589
| +158% | +$68.3K |
|
1329
CALL
Air Products & Chemicals
APD
$66.3B
| $131K | 0.01% |
157
-268
| -63% | -$37.5K |
|
1330
PUT
Becton Dickinson
BDX
$43.1B
| $131K | 0.01% |
191
+103
| +117% | +$17.1K |
|
|
NEWR
1331
DELISTED
New Relic, Inc.
NEWR
| $131K | 0.01% |
+4,663
| New | +$154K |
|
|
TIVO
1332
CALL
DELISTED
Tivo Inc
TIVO
| $131K | 0.01% |
609
-909
| -60% | -$18.5K |
|
|
SAND
1333
CALL
DELISTED
Sandstorm Gold
SAND
| $130K | 0.01% |
1,545
+991
| +179% | +$4.15K |
|
1334
Thor Industries
THO
$3.99B
| $130K | 0.01% |
+1,304
| New | +$118K |
|
1335
CALL
Thermo Fisher Scientific
TMO
$211B
| $130K | 0.01% |
177
+64
| +57% | +$9.44K |
|
|
ILG
1336
CALL
DELISTED
ILG, Inc Common Stock
ILG
| $130K | 0.01% |
1,107
+1,039
| +1,528% | +$18.2K |
|
|
EMWP
1337
DELISTED
Eros Media World PLC
EMWP
| $129K | 0.01% |
+496
| New | +$154K |
|
1338
PUT
Canadian Solar
CSIQ
$906M
| $128K | 0.01% |
398
+49
| +14% | +$640 |
|
1339
CALL
Herbalife
HLF
$1.23B
| $128K | 0.01% |
2,310
-1,454
| -39% | -$39.7K |
|
|
SAGE
1340
DELISTED
Sage Therapeutics
SAGE
| $128K | 0.01% |
2,523
-461
| -15% | -$21.7K |
|
1341
Tesla
TSLA
$1.24T
| $128K | 0.01% |
9,000
-111,195
| -93% | -$1.46M |
|
1342
CALL
Vanguard S&P 500 ETF
VOO
$968B
| $128K | 0.01% |
753
-300
| -28% | -$60.2K |
|
|
HCR
1343
PUT
DELISTED
Hi-Crush Inc. Common Stock
HCR
| $128K | 0.01% |
239
-41
| -15% | -$714 |
|
|
PRXL
1344
CALL
DELISTED
Parexel International Corp
PRXL
| $128K | 0.01% |
360
+228
| +173% | +$14.3K |
|
1345
Beazer Homes USA
BZH
$907M
| $127K | 0.01% |
9,578
+960
| +11% | +$11.9K |
|
1346
CALL
Consolidated Edison
ED
$41.6B
| $127K | 0.01% |
582
+251
| +76% | +$18.1K |
|
1347
ESCO Technologies
ESE
$8.49B
| $127K | 0.01% |
2,246
+598
| +36% | +$30.5K |
|
1348
CALL
HF Sinclair
DINO
$15.9B
| $126K | 0.01% |
379
+200
| +112% | +$5.54K |
|
1349
CALL
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $126K | 0.01% |
1,546
+1,220
| +374% | +$128K |
|
1350
Lumentum
LITE
$59.4B
| $126K | 0.01% |
3,266
-5,210
| -61% | -$207K |
|
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.