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 |
Goldman Sachs
GS
|
+$40.4M |
| 2 |
NVIDIA
NVDA
|
+$23.1M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$21.5M |
| 4 |
Wells Fargo
WFC
|
+$20.8M |
| 5 |
Micron Technology
MU
|
+$20M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Citigroup
C
|
+$21.4M |
| 2 |
Apple
AAPL
|
+$15.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$14.4M |
| 4 |
Eli Lilly
LLY
|
+$10.5M |
| 5 |
iShares Biotechnology ETF
IBB
|
+$8.06M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 9.73% |
| 2 | Communication Services | 9.25% |
| 3 | Consumer Discretionary | 8.76% |
| 4 | Healthcare | 8.53% |
| 5 | Financials | 7.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4726
PUT
AdvanSix
ASIX
$546M
| $4K | ﹤0.01% |
39
+16
| +70% | +$414 |
|
4727
CALL
Credicorp
BAP
$31.1B
| $4K | ﹤0.01% |
95
+86
| +956% | +$14.1K |
|
4728
CALL
Black Hills Corp
BKH
$5.68B
| $4K | ﹤0.01% |
20
-1
| -5% | -$63 |
|
|
BRKL
4729
DELISTED
Brookline Bancorp
BRKL
| $4K | ﹤0.01% |
313
+99
| +46% | +$1.56K |
|
|
SLAI
4730
PUT
DELISTED
SOLAI Ltd ADS
SLAI
| $4K | ﹤0.01% |
+3
| New | +$2.79K |
|
4731
PUT
Credit Acceptance
CACC
$5.78B
| $4K | ﹤0.01% |
27
-121
| -82% | -$24.4K |
|
4732
Camtek
CAMT
$7.07B
| $4K | ﹤0.01% |
+1,107
| New | +$4K |
|
4733
CBIZ
CBZ
$2.39B
| $4K | ﹤0.01% |
298
-2,688
| -90% | -$36.1K |
|
4734
PUT
Cullen/Frost Bankers
CFR
$10.3B
| $4K | ﹤0.01% |
88
-49
| -36% | -$4.41K |
|
4735
CALL
Chegg
CHGG
$110M
| $4K | ﹤0.01% |
39
-48
| -55% | -$370 |
|
|
CLDT
4736
CALL
Chatham Lodging
CLDT
$643M
| $4K | ﹤0.01% |
169
+151
| +839% | +$3.04K |
|
4737
CALL
Compass Minerals
CMP
$1.25B
| $4K | ﹤0.01% |
81
+63
| +350% | +$4.8K |
|
4738
PUT
Canadian National Railway
CNI
$78B
| $4K | ﹤0.01% |
45
-10
| -18% | -$709 |
|
4739
CALL
CNO Financial Group
CNO
$4.96B
| $4K | ﹤0.01% |
126
-254
| -67% | -$5.09K |
|
4740
PUT
Compass Diversified
CODI
$755M
| $4K | ﹤0.01% |
36
-22
| -38% | -$375 |
|
4741
CALL
Comstock Resources
CRK
$3.82B
| $4K | ﹤0.01% |
392
+378
| +2,700% | +$3.82K |
|
4742
Ceragon Networks
CRNT
$197M
| $4K | ﹤0.01% |
1,486
+957
| +181% | +$3.4K |
|
4743
Dana Inc
DAN
$2.93B
| $4K | ﹤0.01% |
221
+141
| +176% | +$2.73K |
|
4744
PUT
Darling Ingredients
DAR
$9.62B
| $4K | ﹤0.01% |
111
+89
| +405% | +$1.17K |
|
4745
Diodes
DIOD
$3.95B
| $4K | ﹤0.01% |
200
-363
| -64% | -$9.03K |
|
4746
PUT
DNOW Inc
DNOW
$2.59B
| $4K | ﹤0.01% |
31
-54
| -64% | -$1.06K |
|
4747
CALL
Emergent Biosolutions
EBS
$378M
| $4K | ﹤0.01% |
15
+5
| +50% | +$152 |
|
4748
Enterprise Financial Services Corp
EFSC
$2.4B
| $4K | ﹤0.01% |
+101
| New | +$4.28K |
|
4749
PUT
Enovis
ENOV
$1.63B
| $4K | ﹤0.01% |
177
+171
| +2,850% | +$11.4K |
|
4750
CALL
Evercore
EVR
$13.2B
| $4K | ﹤0.01% |
25
+21
| +525% | +$1.63K |
|
Similar funds
Simplex Trading's Q1 2017 Portfolio in Review
As of Q1 2017, Simplex Trading held 7,485 positions worth $2.31B, up 38% from $1.67B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading deployed $551M of net new capital in Q1 2017, opening 1,662 new positions and adding to 2,374 existing holdings. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
By sector, the portfolio is most concentrated in Technology at 9.7% of assets, up from 7.2% a quarter earlier, followed by Communication Services and Consumer Discretionary.
On the sell side, the largest reduction was Citigroup, an estimated $21.4M trimmed.
- Simplex Trading's largest Q1 2017 buy was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
- Simplex Trading added most to Goldman Sachs in Q1 2017, an estimated $40.4M increase.
- Simplex Trading's biggest Q1 2017 reduction was Citigroup, cutting an estimated $21.4M.
- Simplex Trading fully exited Invesco QQQ Trust in Q1 2017, selling an estimated $14.4M.
- Simplex Trading's ten largest holdings make up 18% of its $2.31B portfolio in Q1 2017.
- Simplex Trading opened 1,662 new positions and closed 1,369 in Q1 2017.
- Simplex Trading's portfolio value rose 38% quarter-over-quarter to $2.31B.
Based on Simplex Trading's 13F filing for Q1 2017, filed 21 Apr 2017.