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 | |
|---|---|---|---|---|---|---|
3551
PUT
Evolent Health
EVH
$421M
| $15K | ﹤0.01% |
754
+501
| +198% | +$9.62K |
|
3552
PUT
Flowserve
FLS
$9.38B
| $15K | ﹤0.01% |
+109
| New | +$5.28K |
|
3553
Freshpet
FRPT
$3.01B
| $15K | ﹤0.01% |
+1,387
| New | +$15K |
|
3554
PUT
Invesco CurrencyShares Japanese Yen Trust
FXY
$426M
| $15K | ﹤0.01% |
438
-340
| -44% | -$28.9K |
|
|
TDAY
3555
USA Today Co
TDAY
$1.27B
| $15K | ﹤0.01% |
+1,109
| New | +$16.9K |
|
3556
CALL
The GEO Group
GEO
$4.11B
| $15K | ﹤0.01% |
144
-351
| -71% | -$10.1K |
|
3557
PUT
Gerdau
GGB
$9.72B
| $15K | ﹤0.01% |
640
+564
| +742% | +$1.75K |
|
|
GOGL
3558
CALL
DELISTED
Golden Ocean Group
GOGL
| $15K | ﹤0.01% |
259
+184
| +245% | +$1.15K |
|
3559
PUT
Hasbro
HAS
$13.6B
| $15K | ﹤0.01% |
428
+361
| +539% | +$33.4K |
|
3560
CALL
Heron Therapeutics
HRTX
$92M
| $15K | ﹤0.01% |
119
-2
| -2% | -$28 |
|
|
PPLI
3561
CALL
People Inc
PPLI
$3.13B
| $15K | ﹤0.01% |
582
-61
| -9% | -$794 |
|
3562
PUT
Infosys
INFY
$50B
| $15K | ﹤0.01% |
1,892
+916
| +94% | +$6.83K |
|
3563
PUT
Keurig Dr Pepper
KDP
$42.3B
| $15K | ﹤0.01% |
145
+95
| +190% | +$8.86K |
|
3564
CALL
Kirby Corp
KEX
$7.77B
| $15K | ﹤0.01% |
+174
| New | +$11.9K |
|
3565
PUT
Kennametal
KMT
$2.71B
| $15K | ﹤0.01% |
284
+212
| +294% | +$7.81K |
|
3566
PUT
Kodak
KODK
$812M
| $15K | ﹤0.01% |
82
+8
| +11% | +$109 |
|
3567
PUT
Grand Canyon Education
LOPE
$3.99B
| $15K | ﹤0.01% |
179
+25
| +16% | +$1.55K |
|
3568
CALL
Mattel
MAT
$4.49B
| $15K | ﹤0.01% |
657
+574
| +692% | +$15.4K |
|
3569
PUT
Magna International
MGA
$18.8B
| $15K | ﹤0.01% |
90
+56
| +165% | +$2.45K |
|
3570
PUT
Martin Marietta Materials
MLM
$35B
| $15K | ﹤0.01% |
86
-33
| -28% | -$7.28K |
|
|
CALY
3571
PUT
Callaway Golf Company
CALY
$3.28B
| $15K | ﹤0.01% |
211
-93
| -31% | -$1.02K |
|
|
MPT
3572
CALL
Medical Properties Trust
MPT
$2.89B
| $15K | ﹤0.01% |
232
+17
| +8% | +$217 |
|
3573
CALL
Nabors Industries
NBR
$1.12B
| $15K | ﹤0.01% |
8
-9
| -53% | -$6.88K |
|
3574
CALL
NewtekOne
NEWT
$425M
| $15K | ﹤0.01% |
+71
| New | +$1.15K |
|
3575
PUT
NRG Energy
NRG
$26.9B
| $15K | ﹤0.01% |
399
+386
| +2,969% | +$6.4K |
|
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.