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 | |
|---|---|---|---|---|---|---|
876
CALL
Ambarella
AMBA
$3.09B
| $262K | 0.02% |
950
+213
| +29% | +$12.8K |
|
877
CALL
Bunge Global
BG
$23.7B
| $262K | 0.02% |
362
+212
| +141% | +$14.1K |
|
878
CALL
Kinder Morgan
KMI
$72.9B
| $262K | 0.02% |
3,294
-2,359
| -42% | -$49.9K |
|
|
NVTA
879
DELISTED
Invitae Corporation
NVTA
| $261K | 0.02% |
32,931
+32,734
| +16,616% | +$245K |
|
880
PUT
Comcast
CMCSA
$78.3B
| $260K | 0.02% |
5,608
+1,086
| +24% | +$36.3K |
|
881
McKesson
MCK
$96.5B
| $260K | 0.02% |
1,853
+1,659
| +855% | +$244K |
|
882
Entergy
ETR
$54B
| $258K | 0.02% |
7,028
+4,220
| +150% | +$151K |
|
883
CALL
PTC Therapeutics
PTCT
$6.51B
| $257K | 0.02% |
1,234
+614
| +99% | +$6.44K |
|
|
ONIT
884
Onity Group
ONIT
$327M
| $257K | 0.02% |
3,180
-4,089
| -56% | -$288K |
|
|
BBBY
885
PUT
DELISTED
Bed Bath & Beyond Inc
BBBY
| $257K | 0.02% |
745
-182
| -20% | -$7.89K |
|
|
PRMW
886
DELISTED
Primo Water Corporation
PRMW
| $255K | 0.02% |
22,560
+12,631
| +127% | +$157K |
|
|
KANG
887
PUT
DELISTED
iKang Healthcare Group, Inc.
KANG
| $255K | 0.02% |
1,773
+724
| +69% | +$12.3K |
|
|
CEMP
888
PUT
DELISTED
Cempra, Inc.
CEMP
| $255K | 0.02% |
819
+754
| +1,160% | +$9.14K |
|
889
CALL
Blackrock
BLK
$161B
| $254K | 0.02% |
247
+52
| +27% | +$19.1K |
|
890
CALL
Elevance Health
ELV
$82.3B
| $254K | 0.02% |
351
-69
| -16% | -$9.24K |
|
891
ArcelorMittal
MT
$49.9B
| $254K | 0.02% |
11,612
+120
| +1% | +$2.56K |
|
892
CALL
Cummins
CMI
$91.8B
| $253K | 0.02% |
600
+376
| +168% | +$50.3K |
|
|
SWN
893
DELISTED
Southwestern Energy Company
SWN
| $253K | 0.02% |
+23,448
| New | +$268K |
|
894
PUT
Boeing
BA
$165B
| $252K | 0.02% |
3,527
+1,457
| +70% | +$213K |
|
|
FIT
895
DELISTED
Fitbit, Inc. Class A common stock
FIT
| $252K | 0.02% |
34,447
-82,233
| -70% | -$842K |
|
896
iShares TIPS Bond ETF
TIP
$14.5B
| $251K | 0.02% |
2,221
+1,287
| +138% | +$147K |
|
|
FRC
897
DELISTED
First Republic Bank
FRC
| $251K | 0.02% |
+2,729
| New | +$223K |
|
898
Canadian Imperial Bank of Commerce
CM
$106B
| $250K | 0.01% |
+6,142
| New | +$241K |
|
|
MACK
899
DELISTED
Merrimack Pharmaceuticals, Inc.
MACK
| $250K | 0.01% |
7,792
-1,628
| -17% | -$69.4K |
|
900
CALL
Gen Digital
GEN
$15.1B
| $248K | 0.01% |
1,049
-387
| -27% | -$9.5K |
|
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.