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 | |
|---|---|---|---|---|---|---|
3201
CALL
NNN REIT
NNN
$9.36B
| $946K | ﹤0.01% |
20,200
+19,988
| +9,428% | +$936K |
|
|
CRON
3202
Cronos Group
CRON
$1.07B
| $945K | ﹤0.01% |
109,981
-10,685
| -9% | -$88.4K |
|
3203
PUT
W.R. Berkley
WRB
$28.1B
| $945K | ﹤0.01% |
28,575
+28,136
| +6,409% | +$974K |
|
|
MAPS
3204
PUT
DELISTED
WM TECHNOLOGY INC A
MAPS
| $943K | ﹤0.01% |
52,800
+52,353
| +11,712% | +$909K |
|
|
SUNW
3205
CALL
DELISTED
Sunworks, Inc.
SUNW
| $943K | ﹤0.01% |
89,800
+89,094
| +12,620% | +$920K |
|
3206
PUT
Mondelez International
MDLZ
$77.9B
| $942K | ﹤0.01% |
15,100
+14,239
| +1,654% | +$877K |
|
3207
Performance Food Group
PFGC
$18B
| $942K | ﹤0.01% |
+19,437
| New | +$1.03M |
|
3208
Procure Space ETF
UFO
$613M
| $942K | ﹤0.01% |
30,313
+256
| +0.9% | +$7.64K |
|
|
BFX
3209
DELISTED
BowFlex Inc.
BFX
| $942K | ﹤0.01% |
55,914
-62,882
| -53% | -$1.06M |
|
3210
PUT
Rithm Capital
RITM
$5.15B
| $941K | ﹤0.01% |
88,900
+87,486
| +6,187% | +$929K |
|
3211
PUT
The Beachbody Company
BODI
$79.1M
| $941K | ﹤0.01% |
1,810
+1,759
| +3,449% | +$892K |
|
3212
CALL
Aemetis
AMTX
$109M
| $940K | ﹤0.01% |
84,200
+82,716
| +5,574% | +$1.3M |
|
|
HOUS
3213
CALL
DELISTED
Anywhere Real Estate
HOUS
| $940K | ﹤0.01% |
51,600
+51,519
| +63,604% | +$880K |
|
3214
CALL
Bentley Systems
BSY
$10.2B
| $939K | ﹤0.01% |
14,500
+14,496
| +362,400% | +$797K |
|
3215
PUT
XPEL
XPEL
$1.18B
| $939K | ﹤0.01% |
11,200
+11,178
| +50,809% | +$824K |
|
3216
CALL
Shift4
FOUR
$3.96B
| $937K | ﹤0.01% |
10,000
+9,149
| +1,075% | +$864K |
|
3217
Hecla Mining
HL
$10.2B
| $936K | ﹤0.01% |
125,905
+18,815
| +18% | +$141K |
|
3218
Thor Industries
THO
$3.98B
| $936K | ﹤0.01% |
+8,292
| New | +$1.05M |
|
3219
PUT
Barclays
BCS
$96.3B
| $935K | ﹤0.01% |
+96,900
| New | +$990K |
|
3220
PUT
Fidelity National Information Services
FIS
$22.3B
| $935K | ﹤0.01% |
6,600
+6,181
| +1,475% | +$918K |
|
3221
Manchester United
MANU
$3.96B
| $935K | ﹤0.01% |
61,605
+60,415
| +5,077% | +$970K |
|
3222
PUT
Equifax
EFX
$20.8B
| $934K | ﹤0.01% |
3,900
+3,861
| +9,900% | +$863K |
|
|
CODX
3223
PUT
Co-Diagnostics
CODX
$7.52M
| $933K | ﹤0.01% |
3,773
+3,738
| +10,680% | +$961K |
|
|
VWE
3224
CALL
DELISTED
Vintage Wine Estates, Inc. Common Stock
VWE
| $933K | ﹤0.01% |
+77,800
| New | +$829K |
|
3225
PUT
SiriusXM
SIRI
$10.5B
| $932K | ﹤0.01% |
14,260
+14,190
| +20,271% | +$890K |
|
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.