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 Financial Select Sector SPDR ETF
XLF
|
+$42.6M |
| 2 |
Shopify
SHOP
|
+$39.6M |
| 3 |
iShares China Large-Cap ETF
FXI
|
+$35.4M |
| 4 |
Verizon
VZ
|
+$34.1M |
| 5 |
KraneShares CSI China Internet ETF
KWEB
|
+$34.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
AMC Entertainment Holdings
AMC
|
+$49.5M |
| 2 |
GE Aerospace
GE
|
+$35.2M |
| 3 |
Carnival Corporation Ltd
CCL
|
+$30.5M |
| 4 |
Advanced Micro Devices
AMD
|
+$28.8M |
| 5 |
Micron Technology
MU
|
+$23.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.61% |
| 2 | Consumer Discretionary | 0.43% |
| 3 | Healthcare | 0.35% |
| 4 | Communication Services | 0.23% |
| 5 | Financials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
GCP
3401
DELISTED
GCP Applied Technologies Inc.
GCP
| $680K | ﹤0.01% |
+21,505
| New | +$549K |
|
3402
Viasat
VSAT
$9.77B
| $679K | ﹤0.01% |
15,267
-12,285
| -45% | -$636K |
|
|
ANAT
3403
PUT
DELISTED
American National Group, Inc. Common Stock
ANAT
| $679K | ﹤0.01% |
3,600
+3,500
| +3,500% | +$662K |
|
3404
Century Communities
CCS
$2.07B
| $678K | ﹤0.01% |
8,300
-3,042
| -27% | -$217K |
|
3405
Varonis Systems
VRNS
$5.3B
| $678K | ﹤0.01% |
13,902
+10,010
| +257% | +$570K |
|
|
PDCE
3406
PUT
DELISTED
PDC Energy, Inc.
PDCE
| $678K | ﹤0.01% |
13,900
-30,500
| -69% | -$1.57M |
|
3407
PUT
Beyond Air
XAIR
$3.91M
| $677K | ﹤0.01% |
180
-59
| -25% | -$263K |
|
3408
Invesco Water Resources ETF
PHO
$2.04B
| $676K | ﹤0.01% |
11,115
+6,555
| +144% | +$381K |
|
3409
PUT
Blue Owl Capital
OWL
$6.53B
| $675K | ﹤0.01% |
45,300
-24,900
| -35% | -$393K |
|
3410
CALL
Navient
NAVI
$828M
| $674K | ﹤0.01% |
31,800
+9,800
| +45% | +$198K |
|
3411
AerCap
AER
$23.8B
| $673K | ﹤0.01% |
+10,302
| New | +$638K |
|
3412
CALL
AST SpaceMobile
ASTS
$16.8B
| $673K | ﹤0.01% |
84,800
-140,800
| -62% | -$1.45M |
|
3413
CALL
Huron Consulting
HURN
$2.02B
| $673K | ﹤0.01% |
13,500
+600
| +5% | +$30K |
|
3414
CALL
Protagonist Therapeutics
PTGX
$8.7B
| $673K | ﹤0.01% |
19,700
+18,300
| +1,307% | +$578K |
|
3415
CALL
LKQ Corp
LKQ
$6.86B
| $672K | ﹤0.01% |
11,200
-26,500
| -70% | -$1.5M |
|
3416
PUT
Cerus
CERS
$593M
| $671K | ﹤0.01% |
98,600
+54,700
| +125% | +$368K |
|
|
ATCO
3417
DELISTED
Atlas Corp.
ATCO
| $670K | ﹤0.01% |
47,274
-17,168
| -27% | -$243K |
|
3418
PUT
Franklin Resources
BEN
$17.2B
| $669K | ﹤0.01% |
20,000
-63,700
| -76% | -$2.1M |
|
3419
Stride
LRN
$4.01B
| $669K | ﹤0.01% |
20,092
-4,727
| -19% | -$163K |
|
3420
Planet Labs
PL
$7.16B
| $669K | ﹤0.01% |
+108,863
| New | +$1.03M |
|
3421
PubMatic
PUBM
$613M
| $669K | ﹤0.01% |
19,666
+14,842
| +308% | +$484K |
|
3422
PUT
Axsome Therapeutics
AXSM
$12.3B
| $668K | ﹤0.01% |
17,700
+16,200
| +1,080% | +$596K |
|
3423
CALL
Helmerich & Payne
HP
$3.33B
| $668K | ﹤0.01% |
28,200
-19,600
| -41% | -$558K |
|
3424
CALL
Remitly
RELY
$4.83B
| $668K | ﹤0.01% |
+32,400
| New | +$928K |
|
3425
PUT
PagerDuty
PD
$797M
| $667K | ﹤0.01% |
19,200
-21,100
| -52% | -$816K |
|
Similar funds
Simplex Trading's Q4 2021 Portfolio in Review
As of Q4 2021, Simplex Trading held 12,077 positions worth $99B, down 7.5% from $107B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading withdrew a net $10.8B in Q4 2021, closing 1,645 positions and reducing 4,258 holdings. Its most notable exit was Carnival Corporation Ltd, an estimated $30.5M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.61% of assets, up from 0.49% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in iShares China Large-Cap ETF worth $33M.
- Simplex Trading's largest Q4 2021 buy was iShares China Large-Cap ETF: 902,666 shares worth $33M.
- Simplex Trading added most to State Street Financial Select Sector SPDR ETF in Q4 2021, an estimated $42.6M increase.
- Simplex Trading's biggest Q4 2021 reduction was AMC Entertainment Holdings, cutting an estimated $49.5M.
- Simplex Trading fully exited Carnival Corporation Ltd in Q4 2021, selling an estimated $30.5M.
- Simplex Trading's ten largest holdings make up 33% of its $99B portfolio in Q4 2021.
- Simplex Trading opened 2,269 new positions and closed 1,645 in Q4 2021.
- Simplex Trading's portfolio value fell 7.5% quarter-over-quarter to $99B.
Based on Simplex Trading's 13F filing for Q4 2021, filed 4 Feb 2022.