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 |
AMC Entertainment Holdings
AMC
|
+$39.3M |
| 2 |
AT&T
T
|
+$29.8M |
| 3 |
NVIDIA
NVDA
|
+$28.3M |
| 4 |
Micron Technology
MU
|
+$22.9M |
| 5 |
Baidu
BIDU
|
+$22.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$36.1M |
| 2 |
Tesla
TSLA
|
+$35.2M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.9M |
| 4 |
Palantir
PLTR
|
+$25.7M |
| 5 |
Wells Fargo
WFC
|
+$20.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.47% |
| 2 | Consumer Discretionary | 0.39% |
| 3 | Communication Services | 0.27% |
| 4 | Healthcare | 0.26% |
| 5 | Financials | 0.25% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3901
CALL
Denison Mines
DNN
$2.49B
| $586K | ﹤0.01% |
492,500
+488,581
| +12,467% | +$586K |
|
|
XEC
3902
CALL
DELISTED
CIMAREX ENERGY CO
XEC
| $586K | ﹤0.01% |
8,100
+7,845
| +3,076% | +$530K |
|
|
GTLS
3903
CALL
DELISTED
Chart Industries
GTLS
| $585K | ﹤0.01% |
+4,000
| New | +$587K |
|
3904
CALL
Innoviz Technologies
INVZ
$99.5M
| $585K | ﹤0.01% |
+55,400
| New | +$575K |
|
|
TBHC
3905
CALL
DELISTED
The Brand House Collective
TBHC
| $585K | ﹤0.01% |
25,600
+25,446
| +16,523% | +$684K |
|
3906
CALL
Skywest
SKYW
$4.51B
| $585K | ﹤0.01% |
13,600
+13,371
| +5,839% | +$659K |
|
3907
PUT
Organon & Co
OGN
$3.55B
| $584K | ﹤0.01% |
+19,300
| New | +$635K |
|
3908
PUT
Q2 Holdings
QTWO
$3.71B
| $584K | ﹤0.01% |
5,700
+5,598
| +5,488% | +$560K |
|
|
HZON
3909
DELISTED
Horizon Acquisition Corporation II
HZON
| $584K | ﹤0.01% |
59,861
-114,209
| -66% | -$1.14M |
|
|
CMPS
3910
CALL
Compass Pathways
CMPS
$1.46B
| $583K | ﹤0.01% |
15,300
+15,237
| +24,186% | +$544K |
|
3911
LifeMD
LFMD
$186M
| $583K | ﹤0.01% |
+49,501
| New | +$570K |
|
3912
PUT
Tiptree Inc
TIPT
$678M
| $582K | ﹤0.01% |
+62,600
| New | +$661K |
|
3913
Vanguard Real Estate ETF
VNQ
$40B
| $582K | ﹤0.01% |
+5,726
| New | +$568K |
|
|
DGNS
3914
CALL
DELISTED
Dragoneer Growth Opportunities Corp. II Class A Ordinary Shares
DGNS
| $582K | ﹤0.01% |
57,700
+57,409
| +19,728% | +$585K |
|
|
UFS
3915
CALL
DELISTED
DOMTAR CORPORATION (New)
UFS
| $582K | ﹤0.01% |
10,600
+10,329
| +3,811% | +$500K |
|
3916
CALL
Compass Diversified
CODI
$777M
| $581K | ﹤0.01% |
22,800
+22,531
| +8,376% | +$569K |
|
3917
CALL
Valley National Bancorp
VLY
$8.01B
| $581K | ﹤0.01% |
43,300
+42,426
| +4,854% | +$592K |
|
|
COHR
3918
CALL
DELISTED
Coherent Inc
COHR
| $581K | ﹤0.01% |
2,200
+2,175
| +8,700% | +$572K |
|
3919
PUT
Lamb Weston
LW
$7.51B
| $580K | ﹤0.01% |
7,200
+7,012
| +3,730% | +$562K |
|
|
PIPP
3920
PUT
DELISTED
Pine Island Acquisition Corp.
PIPP
| $580K | ﹤0.01% |
59,700
+59,161
| +10,976% | +$585K |
|
3921
PUT
Kiniksa Pharmaceuticals
KNSA
$6.11B
| $578K | ﹤0.01% |
41,500
+41,426
| +55,981% | +$629K |
|
|
HAPN
3922
Happen Inc
HAPN
$2.19B
| $578K | ﹤0.01% |
31,921
-89,214
| -74% | -$1.39M |
|
3923
CALL
USA Compression Partners
USAC
$3.75B
| $578K | ﹤0.01% |
+35,100
| New | +$547K |
|
3924
CALL
TC Energy
TRP
$70.5B
| $577K | ﹤0.01% |
11,680
+11,074
| +1,827% | +$554K |
|
3925
CALL
AquaBounty Technologies
AQB
$4.74M
| $576K | ﹤0.01% |
5,380
+5,363
| +31,547% | +$615K |
|
Similar funds
Simplex Trading's Q2 2021 Portfolio in Review
As of Q2 2021, Simplex Trading held 11,184 positions worth $104B, up 86% from $55.7B the previous quarter. Its ten largest holdings account for 40% of the portfolio.
Simplex Trading deployed $97.5B of net new capital in Q2 2021, opening 2,250 new positions and adding to 6,673 existing holdings. Its largest new stake was AT&T: 1,311,180 shares worth $28.5M.
By sector, the portfolio is most concentrated in Technology at 0.47% of assets, down from 0.65% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, an estimated $25.9M trimmed.
- Simplex Trading's largest Q2 2021 buy was AT&T: 1,311,180 shares worth $28.5M.
- Simplex Trading added most to AMC Entertainment Holdings in Q2 2021, an estimated $39.3M increase.
- Simplex Trading's biggest Q2 2021 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $25.9M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2021, selling an estimated $36.1M.
- Simplex Trading's ten largest holdings make up 40% of its $104B portfolio in Q2 2021.
- Simplex Trading opened 2,250 new positions and closed 1,197 in Q2 2021.
- Simplex Trading's portfolio value rose 86% quarter-over-quarter to $104B.
Based on Simplex Trading's 13F filing for Q2 2021, filed 12 Aug 2021.